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L6480H - 10A Dual Full-Bridge Stepper Motor Driver | STMicroelectronics
The STMicroelectronics L6480H is a fully integrated dual full-bridge stepper motor driver capable of delivering up to 10A peak output current per bridge, designed for high-performance motion control applications. It operates from a supply voltage range of 8V to 85V and integrates a complete digital control core with SPI interface, making it a versatile solution for industrial automation, robotics, and CNC machinery. The device is housed in a 28-pin HTSSOP (H) package with an exposed thermal pad, enabling efficient heat dissipation in compact designs. Data verified as of 2026-08-05. A stepper motor driver is a power management IC that translates digital step and direction commands into precise current-controlled pulses for driving bipolar stepper motors. It sits within the hierarchy: stepper motor driver -> motor driver -> power management IC -> semiconductor. The L6480H integrates both the power stage and the control logic, eliminating the need for external MOSFETs and simplifying PCB design. This integration reduces component count and improves reliability, making it a key building block in modern motion control systems. Key features of the L6480H include a programmable output current up to 10A peak, microstepping up to 1/128 step, and a wide supply voltage range of 8V to 85V. It also features overcurrent, overtemperature, and undervoltage protection, ensuring robust operation in harsh industrial environments. The SPI interface allows real-time configuration and monitoring, while the dedicated STEP and DIR pins enable simple interfacing with microcontrollers or motion controllers. The L6480H utilizes a proprietary advanced current control algorithm that minimizes motor noise and vibration, improving positioning accuracy. The device supports both full-step and microstepping modes, with the ability to adjust the decay mode for optimal performance across different motor types. The integrated sense resistors eliminate the need for external current sensing, further reducing BOM cost and board space. Typical applications include CNC machines, 3D printers, textile machinery, and automated assembly equipment. The L6480H's high current capability and wide voltage range make it suitable for driving large NEMA 34 and NEMA 42 stepper motors, which are common in industrial automation. Its SPI interface also enables advanced features like stall detection and position tracking, enhancing system intelligence. When designing with the L6480H, ensure adequate PCB copper area for thermal dissipation, as the device can dissipate significant power at high currents. The exposed pad must be soldered to a thermal via array connected to a ground plane. Additionally, place decoupling capacitors close to the VM and VCC pins to minimize voltage transients. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the STMicroelectronics datasheet, providing engineers with a comprehensive resource for selecting and implementing the L6480H in their designs.
L6561D013TR - Transition-Mode PFC Controller | STMicroelectronics
The STMicroelectronics L6561D013TR is a current-mode power-factor-correction controller operating in transition mode, with a nominal 13 V output and an 8-pin SOIC package. It is designed for boost PFC stages in offline power supplies, where it controls input current to improve power factor and reduce input-current distortion. According to the manufacturer product page, L6561 is compatible with the standard L6560 architecture and supports wide input-voltage applications from 85 V to 265 V with low total harmonic distortion. A PFC controller is a power-management IC that shapes the current drawn from an AC input so that the input current is more closely in phase with the input voltage. In boost PFC, the controller drives a switching converter between the rectified mains input and a higher DC bus. The transition-mode control approach improves input-current shaping while supporting high power-factor power supplies used in industrial equipment, chargers, servers, and power-factor-correction front ends. Key features reported for the L6561 family include an adjustable output-overvoltage protection function, a 50 uA typical startup current, a 4 mA typical operating supply current, an internal startup timer, an on-chip current-sense filter, an internal disable function, and a 1% internal reference at 25 C. The transition-mode PFC function is intended for wide-input applications where reduced harmonic distortion and controlled boost operation are important. The L6561D013TR is supplied in an 8-pin SOIC package. Its suffix identifies the STMicroelectronics ordering configuration, while the D013TR part is associated with a 13 V nominal variant in the distributor data. Exact pin names, voltage limits, switching thresholds, timing values, and absolute maximum ratings should be confirmed from the official STMicroelectronics datasheet before final circuit design, because those parameters are not included in the supplied verification snippets. Typical applications include AC-DC power-factor-correction stages for industrial and consumer power supplies, server or telecom power systems with active PFC, battery-charging front ends, and offline converters requiring harmonic-current reduction. The controller is normally placed around a boost switch, inductor, rectified input bridge, sensing network, and protection circuitry. Component values must be calculated from the target bus voltage, output power, input range, switching frequency, inductor ripple, and current-sense threshold. A key design consideration is the interaction between the controller, boost inductor, MOSFET, rectifier bridge, and current-sense network. Keep the current-sense path short and shielded from high-dV/dt switching nodes, select the MOSFET and rectifier for the intended voltage and current stresses, and validate startup, overvoltage, line transients, and thermal behavior over the complete input range. This page combines verified distributor data, manufacturer information, replacement research, and practical design guidance.
L6562D Transition-Mode PFC Controller | STMicroelectronics
The STMicroelectronics L6562D is a current-mode power-factor-correction controller operating in transition mode, with a 1 MHz switching-related specification, a 10.3 V to 22 V supply range, and an SOIC-8 package. It is designed for boost PFC preregulators in AC power supplies and electronic ballasts. According to the manufacturer’s product description, the L6562 is pin-to-pin compatible with its L6561 predecessor while providing improved performance. A power-factor-correction controller is a specialized power-management IC that shapes the input current drawn from an AC rectifier so that it is closer to sinusoidal and has a near-unity power factor. In a boost PFC stage, the controller regulates the DC output bus while monitoring input current and voltage. This reduces reactive current, lowers input-current distortion, and helps the power stage comply with power-quality requirements. The L6562D features a proprietary multiplier design for minimum AC-input-current total harmonic distortion, precise adjustable output-overvoltage protection, ultra-low start-up current of 70 µA, and low quiescent current of approximately 4 mA. The verified distributor data identifies the device as a discontinuous/transition-mode PFC controller rated for operation from a 10.3 V to 22 V supply, with 10.3 V lockout and approximately 3.5 mA supply current in another distributor description. The exact maximum output-voltage and compensation details should be confirmed against the manufacturer datasheet before production release. Typical applications include server and telecom power supplies, industrial AC-DC converters, LED-driver front ends, electronic ballasts, and other boost PFC preregulators. The controller’s current-mode architecture supports cycle-by-cycle current control, while transition-mode operation allows the switching frequency to vary with the rectified input voltage. Designers must still validate loop compensation, inductor sizing, MOSFET selection, startup behavior, fault thresholds, and safety isolation in the final reference design. The main design consideration is that controller substitution is not automatically safe even when the package is similar. A candidate must match the L6562D pin functions, control architecture, timing behavior, voltage thresholds, compensation method, and protection strategy. Use the manufacturer datasheet and the application circuit as the authority rather than relying on distributor category descriptions alone. This page consolidates verified distributor and manufacturer links, identifies the supported L6561 compatibility statement, and separates known engineering facts from missing specifications. Use it for initial component selection and sourcing, then complete a manufacturer-level design review for compliance and production use.
L6566BHTR - Multimode SMPS PWM Controller, 16-SO | STMicroelectronics
The STMicroelectronics L6566BHTR is a current-mode PWM controller for high-performance offline flyback converters operating from rectified 3-phase or single-phase universal mains, packaged in a 16-pin SO (16-SOIC, 0.154" / 3.90 mm width) and supplied on tape-and-reel. It combines a fixed-frequency (FF) mode and a quasi-resonant (QR) valley-skipping mode selectable via the user's load profile, switching at frequencies from 10 kHz up to 300 kHz. Key headline parameters are: 800 V on-board high-voltage start-up, 8 V to 23 V VCC supply range, and 3 mA quiescent current. According to the manufacturer datasheet, the controller integrates all the loops and protections required for offline SMPS designs, including a precise current-mode core with line-voltage feed-forward, programmable dead-time, and over-current / over-load / over-voltage latched disable. A primary-side SMPS controller (PWM controller) is the analog brain of an isolated switching power supply. It senses output voltage and primary current, generates the duty-cycle command for the external high-voltage MOSFET, and orchestrates soft-start, frequency modulation, and fault shutdown. Primary controllers sit hierarchically inside AC-DC converters -> offline switchers -> switch-mode power supply (SMPS) ICs -> power management semiconductors, and are commonly described using synonyms such as "current-mode PWM controller", "quasi-resonant controller", or "flyback controller". The L6566BH features multimode operation: at light load the IC enters valley-skipping quasi-resonant mode to minimise switching losses and EMI; at heavier load it transitions to fixed-frequency CCM/DCM. Advanced light-load management, 800 V high-voltage start-up, low quiescent current of 3 mA, and 750 mW power dissipation are core specifications. These translate into compact, efficient, and thermally-friendly adapters and open-frame supplies for both consumer and industrial white-goods markets. Architecturally, the L6566BH uses a peak-current-mode control loop with input-voltage feed-forward to deliver constant loop gain across the universal mains range (90 V to 264 V AC, or 3-phase rectified 380 V DC). Quasi-resonant valley switching keeps the MOSFET turn-on loss low and lowers EMI harmonics versus hard-switched PWM, while fixed-frequency operation guarantees predictable EMI signatures for worst-case load. The internal 800 V start-up cell eliminates the auxiliary winding bias resistor chain at start-up and survives input surges on the rectified mains bus. Typical applications include notebook and tablet adapters (45 W to 120 W), LCD-TV and monitor SMPS sub-modules, set-top box and white-goods offline supplies, and industrial auxiliary rails in 3-phase systems. The 8 V to 23 V VCC range also suits 12 V or 24 V distributed-bus front-ends. When using the L6566BH, allocate at least 1 cm² of copper around the SO-16 thermal pad footprint to keep junction rise below 70 °C, and use a 1 nF to 10 nF X7R timing capacitor on the timing pin to keep frequency drift under 5 % over the full operating temperature range.
L6566BTR - Multi-Mode PWM SMPS Controller, 300kHz, SO-16 | STMicroelectronics
The STMicroelectronics L6566BTR is a multi-mode current-mode PWM controller for high-performance offline flyback converters, packaged in a 16-pin SO (SO-16) tape-and-reel format. It combines a fixed-frequency and quasi-resonant topology switchable on the fly, on-board 700 V high-voltage start-up, and a 10 kHz to 300 kHz programmable switching range. The controller integrates adaptive UVLO, line feedforward for constant power vs. mains, and advanced light-load management that reduces quiescent current to about 3 mA. What is a multi-mode SMPS controller? It is a power-supply control IC that automatically transitions between operating modes - typically quasi-resonant (valley-switching) at high load and frequency-foldback or burst-mode at light load - to optimize efficiency across the entire load curve. The L6566B family belongs to ST's L65xx power-management portfolio, used as the primary-side controller in AC-DC switch-mode power supplies. The hierarchy is: PWM controller -> SMPS controller -> power management IC -> semiconductor. Key features include 8 V to 23 V supply range, 800 mA peak source/sink gate drive capability, programmable maximum duty cycle, overcurrent protection with fault counter, and transformer-saturation detection. The integrated high-voltage startup eliminates the external startup resistor network, reducing BOM count and standby loss. These specifications make the L6566BTR suited for compliance-driven adapters, set-top boxes, and white-goods SMPS designs targeting ENERGY STAR and EuP Tier-2 standby targets. The 'UVLO' (Undervoltage Lockout) and 'PWM' (Pulse Width Modulation) abbreviations are industry-standard. Architecturally, the L6566BTR uses a current-mode control loop with a leading-edge blanking, plus a valley-detection block that identifies the drain-voltage valleys for quasi-resonant switching. The 700 V startup MOSFET is rated for direct connection to the rectified mains, and the controller auto-restarts on fault events with user-programmable retry timing. The 16-pin SO package is JEDEC-standard (SO-16 narrow body, 150 mil) for surface-mount assembly, with RoHS-compliant lead-free finish and MSL Level 1 moisture rating. Typical applications include notebook adapters, set-top box power supplies, LCD TV SMPS, white-goods auxiliary supplies, and any offline flyback design requiring both high efficiency at full load and ultra-low standby power at no load. The device is also described in datasheet literature as suitable for single-stage PFC converters meeting EN61000-3-2. When designing with this part, ensure the HV pin is connected to the rectified mains through an external resistor network sized for inrush, and place the optocoupler feedback loop compensation components per the application note reference design. Avoid exceeding the 23 V Vcc absolute maximum to prevent IC damage during transient events. This page synthesizes STMicroelectronics datasheet figures, current distributor stock and pricing, and engineer-oriented drop-in alternatives not consolidated in a single vendor product page.
L6591TR - ZVS Half-Bridge PWM Controller | STMicroelectronics
The STMicroelectronics L6591TR is a double-ended current-mode PWM controller designed for soft-switched (Zero-Voltage Switching, ZVS) half-bridge topology, operating up to 500 kHz and packaged in a 16-pin SOIC. It delivers complementary gate-drive outputs with duty cycle D for the high-side switch and 1-D for the low-side switch (D < 50%), an externally programmable deadtime between alternating gate transitions, and on-board high-voltage start-up. A half-bridge PWM controller (also called a resonant or ZVS half-bridge controller) is a power-management IC that drives two MOSFETs in a totem-pole arrangement across a transformer primary, switching at zero voltage across the drain-source of each FET to minimize switching losses. Within the broader power-electronics taxonomy, this places the device in: power management IC -> AC-DC converter -> resonant controller -> half-bridge ZVS controller. The soft-switching technique is widely used in switch-mode power supplies (SMPS) where efficiency and EMI performance are critical, including adapters, LCD-TV power, and telecom converters. Key features include 500 kHz maximum switching frequency, programmable deadtime to avoid cross-conduction, adaptive Under-Voltage Lockout (UVLO) with line-sensing, pulse-by-pulse Over-Current Protection (OCP), latched or auto-restart Over-Load Protection (OLP), and advanced light-load management that disables one gate at low load to reduce circulation losses. The high-voltage start-up cell draws power directly from the bulk rail, eliminating an external auxiliary winding for start-up. The L6591 employs a current-mode control architecture with a leading-edge blanking circuit on the current-sense input, providing clean cycle-by-cycle current limiting even with leading-edge spikes from the resonant tank. The integrated bootstrap driver for the high-side switch simplifies the gate-drive network and supports switching frequencies up to 500 kHz, well beyond conventional hard-switched half-bridge controllers. Typical applications include resonant and quasi-resonant SMPS for LCD TVs, laptop adapters, game-console power supplies, telecom DC-DC converters, and industrial AC-DC adapters. Designers choose the L6591TR when ZVS operation is required for efficiency above 90% and reduced EMI versus hard-switched topologies. A critical design consideration is the deadtime programming: too short causes shoot-through losses, too long increases body-diode conduction. The companion L6668 (multi-mode controller) and the L6599 (LLC resonant half-bridge with high-voltage start-up) are members of the same ST controller family; the L6591TR remains a cost-effective choice for ZVS half-bridge topologies below ~200 W. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including cross-brand pin-compatible equivalents and recommended companion power MOSFETs for resonant tank designs.
L6599DTR - 600V Resonant Half-Bridge Controller IC | STMicroelectronics
The STMicroelectronics L6599DTR is a high-voltage resonant half-bridge controller IC designed for double-ended LLC and resonant topologies, integrating a 600 V-compatible high-side gate driver with a built-in bootstrap diode in a 16-pin SO (narrow) package. It delivers a fixed 50% complementary duty cycle driving the high-side and low-side switches 180 degrees out of phase, supports switching frequencies up to 500 kHz with high-accuracy oscillator control, and operates from a VCC supply of 8.85 V to 16 V. The device is engineered as a complete control solution for the resonant tank stage of AC-DC adapters and converters, supporting PFC-interfaced power architectures and providing critical protection features including two-level overcurrent protection with frequency shift and latched shutdown, a latched disable input, and brown-out protection on the LINE pin. A resonant half-bridge controller is a type of switching power supply controller that drives a series resonant tank (typically LLC) to achieve zero-voltage switching (ZVS) on the primary MOSFETs, dramatically reducing switching losses compared to hard-switched PWM converters. Within the broader power management hierarchy, the L6599 belongs to the SMPS (switched-mode power supply) controller family, which sits above discrete gate drivers and below complete AC-DC or DC-DC converter modules. This category enables high-efficiency power conversion across industrial, consumer, and computing applications. The L6599DTR provides adjustable minimum frequency via RT timing resistor, soft-start programmability, and a dedicated PFC interface that can inhibit or synchronize the front-end PFC controller during converter startup, light-load, or fault conditions. Its 600 V high-side driver tolerates the full rectified mains voltage with substantial margin, making it suitable for universal-input (90-264 VAC) designs without an external bootstrap driver. The integrated anti-cross-conduction logic and adaptive dead-time generation further simplify the gate-drive network. Typical applications include 90 W to 400 W AC-DC adapters (often paired with a PFC controller such as the L6563 or L6562A), LCD TV and monitor power supplies, all-in-one PC power units, and industrial switch-mode power supplies requiring high efficiency and low EMI. The resonant topology inherently delivers low EMI, enabling designs that meet EN55022 Class B without extensive filtering. The device is also widely used in LED driver power stages where high efficiency and compact magnetics are required. When designing with the L6599DTR, ensure that the bootstrap capacitor is sized for the chosen switching frequency and high-side on-time, and route the BOOT pin trace as short as possible. The OSC pin capacitor and resistor set both the minimum switching frequency and the soft-start time constant, so their tolerances directly affect burst-mode entry and exit thresholds in light-load operation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
L6984TR - 36V, 400mA Sync Step-Down Converter | STMicroelectronics
The STMicroelectronics L6984TR is a 36 V, 400 mA synchronous monolithic step-down switching regulator housed in a 10-pin VFDFN exposed-pad package. It integrates the high-side and low-side power MOSFETs, supports an adjustable output from 0.9 V to 28 V, and ships in a fixed 3.3 V VOUT variant that needs no external resistor divider. The device operates across a 4.5 V to 36 V input range, making it suited to 12 V/24 V industrial and automotive rails. A switching DC-DC converter (buck regulator) is a power management IC that steps a higher DC input voltage down to a lower regulated DC output voltage using a controlled switching element, an inductor, and an output capacitor. Synchronous buck converters integrate a low-side rectifier MOSFET (replacing the traditional Schottky diode) to improve efficiency, especially at light loads. The L6984TR belongs to ST's L698x family of step-down regulators within the broader power management IC hierarchy, designed for distributed point-of-load applications where small PCB area and high efficiency at low current are required. Key features of the L6984TR include a wide 4.5 V-36 V input range, integrated high-side and low-side MOSFETs, an internal reference of 0.9 V with ±2% accuracy, a fixed 3.3 V VOUT option, Low Consumption Mode (LCM) that maintains efficiency at light load with controlled output ripple, and internal compensation. The synchronous rectification architecture minimizes external component count while preserving high efficiency across the 0.4 A load profile. Internally, the L6984TR uses a peak-current-mode control topology with an embedded compensation network, allowing the device to operate with a small 4.7 µH-22 µH inductor and low-value ceramic output capacitors. The internal N-MOSFET pair is sized for 400 mA continuous load, and the LCM function automatically skips pulses at light load to keep quiescent current low and reduce output ripple below audible bands. Typical applications include 24 V industrial sensor rails, automotive body and accessory supplies, distributed 5 V/3.3 V point-of-load conversion in PLC modules, smart metering, and low-power IoT edge nodes. The wide input range also covers 12 V battery and 24 V bus transient environments. When designing with the L6984TR, choose the inductor value based on the switching frequency (typically 250 kHz-1 GHz depending on variant) and ripple target. Place the input ceramic capacitor close to the VIN pin and connect the exposed pad (EP) to a sufficiently large copper island to dissipate up to ~1 W continuous. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Source pricing reflects up-to-date distributor listings as of 2026-10-08.
L7805ABV - 5V 1.5A Linear Regulator | STMicroelectronics
The STMicroelectronics L7805ABV is a fixed 5 V positive three-terminal linear voltage regulator with up to 1.5 A output current in a TO-220 package. It is designed for local on-card regulation and includes fixed 5 V output, positive regulation, and robust protection functions. The available distributor descriptions identify the device as a low-dropout linear regulator, while the manufacturer datasheet describes the L7800A family as precision regulator solutions with internal current limiting, thermal shutdown, and safe-area protection. A linear voltage regulator converts an input voltage into a stable output by passing or regulating current rather than switching the supply through an inductor and switching node. The L7805ABV belongs to the linear regulator and voltage-regulator hierarchy, making it useful where a simple, low-noise 5 V rail is needed from a higher-voltage supply. Its fixed 5 V output simplifies designs that do not require an adjustable rail. The key verified features include a 5.0 V nominal output, positive fixed regulation, a TO-220 package, and distributor-rated current capability shown as 1.5 A by DigiKey and 1.0 A by Mouser. The manufacturer datasheet search result also describes the family as suitable for output currents in excess of 1 A when adequate heat sinking is provided. Its internal current limiting, thermal overload protection, and safe operating-area protection improve robustness in local regulation circuits. The device is suitable for industrial control boards, power-supply modules, embedded systems, instrumentation, and general-purpose 5 V regulation. Because a linear regulator dissipates the difference between input and output voltage as heat, input-to-output headroom and thermal management determine practical load capability. A TO-220 package also requires correct mechanical mounting and sufficient thermal path to the board or heatsink. For a new design, check the minimum input voltage, dropout requirement, maximum input voltage, output-current budget, thermal limits, and required capacitor network against the current STMicroelectronics datasheet. Do not substitute a different package without confirming pinout, polarity, stability, and thermal requirements. The verified distributor data does not provide a complete current price ladder or lifecycle statement, so those values are not inferred here. This page consolidates verified distributor identity and package information, manufacturer-family technical context, sourcing links, and design guidance intended to help engineers compare fixed 5 V linear regulators without treating package similarity as proof of drop-in compatibility.
L7805ABV-DG - 5V 1.5A Positive LDO Regulator | STMicroelectronics
The STMicroelectronics L7805ABV-DG is a three-terminal positive fixed linear voltage regulator delivering 5V output at up to 1.5A output current in a TO-220 through-hole package (3 pins plus tab). As an A-version member of the L78 series, it guarantees a tight 2% output voltage tolerance and includes internal current limiting, thermal shutdown, and safe-operating-area (SOA) protection, making it effectively indestructible in typical designs. A linear voltage regulator is a power-management IC that maintains a constant DC output voltage by dissipating the difference between input and output voltage as heat. In the regulator hierarchy - voltage regulator, then linear regulator, then low-dropout (LDO) regulator - the L7800 series is a standard (non-LDO) linear regulator requiring approximately 2V of dropout headroom. Three-terminal regulators like the 7805 remain among the most widely used power ICs in electronics history. Key features of the L7805ABV-DG include the 5V fixed output with 2% tolerance (the A-version advantage over the standard L7805CV 4% grade), 1.5A maximum output current with adequate heatsinking, output transition SOA protection, short-circuit protection, and thermal overload protection. Thermal shutdown typically activates near 150C junction temperature, protecting the device during fault conditions. Internally, the device uses a bipolar linear architecture with a bandgap reference and series pass transistor. Quiescent current is in the millivolt-per-milliamp range typical of the L78 family, and ripple rejection is approximately 70 to 80 dB at low frequencies when the input is well-filtered, allowing it to clean up noisy upstream supplies for analog loads. Typical applications include 5V logic supplies for microcontrollers, powering sensors and relay coils in industrial controls, post-regulation after DC-DC converters, bench and educational power supplies, and automotive accessory circuits (with suitable input protection). Its through-hole TO-220 package also makes it a favorite for prototyping and repair work. Design consideration: keep the input at least 2V above the output (7V minimum at the regulator input for a 5V output) across all load and ripple conditions, and size the heatsink for worst-case dissipation of (VIN - 5V) x IOUT. This page synthesizes distributor pricing from 11 sources, verified drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet, as of 2026-10-20.
L7805CV - 5V 1.5A Positive Voltage Regulator | STMicroelectronics
The STMicroelectronics L7805CV is a fixed positive voltage regulator that provides a stable 5V output with a maximum output current of 1.5A. It is housed in a TO-220 package, which is widely used for through-hole mounting and offers excellent thermal performance. The device operates over an input voltage range of 7V to 35V, making it suitable for a variety of power supply applications. Data verified as of 2026-08-05. A linear voltage regulator is a type of voltage regulator that maintains a constant output voltage by dissipating excess power as heat. The L7805CV is a member of the 78xx series of fixed linear regulators, which are part of the broader category of voltage regulators within power management ICs. Linear regulators are known for their simplicity, low noise, and fast transient response, making them ideal for applications where clean and stable power is required. Key features of the L7805CV include internal current limiting, thermal shutdown, and safe-area compensation, which protect the device and the load from damage. The output voltage is fixed at 5V with a typical accuracy of ±2% (4.8V to 5.2V). The dropout voltage is typically 2V at 1A output current, meaning the input must be at least 7V for proper regulation. The device also offers a ripple rejection of 62 dB at 120 Hz, ensuring minimal AC ripple on the output. The L7805CV is built using a bipolar junction transistor (BJT) process, which provides robust performance and high reliability. The TO-220 package includes a metal tab that can be connected to a heatsink for improved thermal dissipation. The thermal resistance from junction to case is 5°C/W, and the maximum junction temperature is 150°C. This allows the device to handle power dissipation up to 15W with adequate heatsinking. Typical applications include power supplies for microcontrollers, logic circuits, and analog circuits, as well as battery chargers and instrumentation. The wide input voltage range and high output current make it versatile for both low-power and moderate-power applications. In a typical design, the L7805CV is used with input and output capacitors (0.33µF and 0.1µF) to ensure stability and reduce noise. When designing with the L7805CV, it is important to consider the power dissipation and thermal management. For example, at VIN=12V, VOUT=5V, and 1A load, the power dissipation is 7W, which requires a heatsink to keep the junction temperature within safe limits. The input capacitor should be placed close to the input pin, and the output capacitor should be placed close to the output pin to minimize parasitic inductance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the STMicroelectronics datasheet, providing engineers with a comprehensive resource for selecting and using the L7805CV.
L7980TR - 2A Step-Down Switching Regulator | STMicroelectronics
The STMicroelectronics L7980TR is a step-down switching regulator capable of delivering up to 2A output current. It operates from an input voltage range of 4.5V to 28V and provides an adjustable output voltage down to 0.6V. The device is available in an 8-pin SOIC package (SO-8) and is designed for high-efficiency power conversion in a wide range of applications. A step-down switching regulator, also known as a buck converter, is a type of DC-DC converter that efficiently reduces a higher input voltage to a lower output voltage. Unlike linear regulators, which dissipate excess power as heat, switching regulators use an inductor, a switch, and a diode to transfer energy in discrete pulses, achieving efficiencies often above 90%. This makes them essential in battery-powered and high-current applications where power loss must be minimized. The L7980TR belongs to the broader category of power management ICs, specifically within the DC-DC converter family. Key features of the L7980TR include a 250 kHz fixed switching frequency, an internal power MOSFET with a low RDS(on) of 250 mOhm, and a high-efficiency design that minimizes external component count. The device also includes an internal compensation network, soft-start, and thermal shutdown protection, simplifying the design process. The adjustable output voltage, set by an external resistor divider, allows flexibility for various output levels. The L7980TR utilizes a current-mode control architecture, providing fast transient response and stable operation over a wide range of load currents. The internal compensation eliminates the need for external compensation components, reducing board space and design complexity. The device's high switching frequency allows the use of small, low-cost inductors and capacitors, further reducing the overall solution footprint. Typical applications include point-of-load (POL) converters for FPGAs, DSPs, and microcontrollers, as well as distributed power systems, battery chargers, and industrial control systems. The wide input voltage range makes it suitable for 12V and 24V industrial buses, while the high efficiency extends battery life in portable devices. When designing with the L7980TR, ensure proper PCB layout with short, wide traces for high-current paths and adequate grounding. The exposed pad (if present) should be connected to the ground plane for thermal dissipation. Input and output capacitors should be placed close to the IC to minimize parasitic inductance and ensure stable operation.
L7981TR - 2A Step-Down Switching Regulator | STMicroelectronics
The STMicroelectronics L7981TR is a step-down switching regulator capable of delivering up to 2A output current from an input voltage range of 4.5V to 28V. Housed in a compact 8-pin SOIC (SO-8) package, this device integrates a high-side power MOSFET and provides a fixed 3.3V output voltage, making it suitable for a wide range of power conversion applications. A step-down switching regulator, also known as a buck converter, is a type of DC-DC converter that efficiently reduces a higher input voltage to a lower output voltage. Unlike linear regulators, which dissipate excess power as heat, switching regulators use an inductor and a switch to transfer energy in discrete pulses, achieving high efficiency, especially when the input-to-output voltage difference is large. The L7981TR belongs to the broader category of power management ICs, specifically within the DC-DC converter family, and is designed for applications requiring reliable and efficient voltage step-down. Key features of the L7981TR include a 2A output current capability, a wide input voltage range of 4.5V to 28V, and a fixed 3.3V output voltage. The device operates at a switching frequency of 250 kHz, which balances efficiency and component size. It also features internal current limiting, thermal shutdown, and an enable pin for power sequencing. The SO-8 package offers a compact footprint with a thermal resistance of approximately 62.5 C/W, allowing for moderate power dissipation without external heatsinking. The L7981TR utilizes a current-mode control architecture, which provides fast transient response and simplifies loop compensation. The integrated high-side MOSFET reduces external component count, while the internal compensation network minimizes design complexity. The device's high efficiency, typically above 85% for 12V to 3.3V conversion at 1A load, makes it suitable for battery-powered and industrial applications where power loss must be minimized. Typical applications include point-of-load (POL) converters for microcontrollers and FPGAs, industrial control systems, and distributed power architectures. The wide input range allows operation from 5V USB supplies, 12V industrial rails, and 24V bus systems, providing design flexibility across multiple platforms. When designing with the L7981TR, ensure proper input and output capacitor selection to maintain stability and minimize output ripple. The enable pin allows sequenced power-up in multi-rail systems, which is critical for processors requiring specific rail sequencing. Additionally, the thermal pad on the SO-8 package should be connected to a sufficient copper area for heat dissipation.
L7983TR - 38V 3A Step-Down Switching Regulator | STMicroelectronics
The STMicroelectronics L7983TR is a step-down switching regulator (buck converter) capable of delivering up to 3A output current from an input voltage range of 4.5V to 38V. Housed in a compact 8-pin SOIC (SO-8) package, this device integrates a high-side power MOSFET and provides a fixed 250kHz switching frequency, making it suitable for a wide range of power conversion applications. A buck converter, also known as a step-down regulator, is a type of DC-DC converter that efficiently reduces a higher input voltage to a lower output voltage. It operates by rapidly switching a transistor on and off, storing energy in an inductor during the on-time and releasing it to the load during the off-time. This switching action achieves high efficiency, typically above 85%, which is critical in battery-powered and thermally constrained systems. The L7983TR belongs to the family of switching regulators, which are a subset of power management ICs, and is designed to replace less efficient linear regulators in applications where power dissipation is a concern. Key features of the L7983TR include a 3A output current capability, a wide input voltage range of 4.5V to 38V, and a fixed 250kHz switching frequency. The device offers internal compensation, simplifying the design by reducing external component count. It also includes overcurrent protection, thermal shutdown, and an enable pin for power sequencing. The high switching frequency allows for the use of small inductors and capacitors, reducing the overall solution footprint. The L7983TR utilizes a current-mode control architecture, which provides fast transient response and stable operation over a wide range of load conditions. The integrated high-side MOSFET minimizes external component count and reduces conduction losses. The device is designed for high efficiency, with a typical efficiency of 90% at 12V input and 5V output at 2A load. The internal soft-start function limits inrush current during startup, preventing output overshoot. Typical applications include industrial power supplies, automotive systems, distributed power architectures, and point-of-load (POL) converters. The wide input voltage range makes it suitable for 12V and 24V bus systems, while the 3A output current can power FPGAs, microcontrollers, and sensors. The enable pin allows for power sequencing in multi-rail systems, ensuring proper startup order. When designing with the L7983TR, ensure proper PCB layout with short, wide traces for high-current paths and adequate ground plane for thermal management. The inductor and output capacitor should be placed close to the IC to minimize parasitic inductance. The feedback resistor divider should be placed away from the inductor to avoid noise coupling. The thermal pad (if present) should be soldered to a large copper area for heat dissipation.
L7985TR - 2A Step-Down Switching Regulator | STMicroelectronics
The STMicroelectronics L7985TR is a step-down switching regulator capable of delivering up to 2A output current. It operates from an input voltage range of 4.5V to 38V, making it suitable for a wide variety of industrial and automotive applications. The device is available in a compact HSOP-8 package, which is designed for surface-mount assembly and provides excellent thermal performance. A step-down switching regulator, also known as a buck converter, is a type of DC-DC converter that efficiently reduces a higher input voltage to a lower output voltage. Unlike linear regulators, which dissipate excess power as heat, switching regulators use an inductor and a switch to transfer energy in a controlled manner, achieving high efficiency. The L7985TR belongs to the family of voltage regulators, which are essential components in power management systems, converting unregulated power sources into stable, usable voltages for electronic circuits. Key features of the L7985TR include a 250 kHz fixed switching frequency, an internal power MOSFET, and a current-mode control architecture. The device offers a typical efficiency of over 85% at full load, reducing power loss and heat generation. It also includes a built-in soft-start function to limit inrush current during startup, and a thermal shutdown protection to prevent damage from overheating. The output voltage is adjustable from 0.6V to the input voltage, providing flexibility for various design requirements. The L7985TR utilizes a current-mode control scheme, which provides fast transient response and simplifies loop compensation. The internal power switch is rated for a peak current of 3A, ensuring reliable operation under load transients. The device also features a low quiescent current of 2.5 mA, which is beneficial for battery-powered applications. The HSOP-8 package has a thermal resistance of 40°C/W, allowing for efficient heat dissipation in moderate power applications. Typical applications for the L7985TR include point-of-load converters, distributed power systems, industrial control systems, and automotive power supplies. Its wide input voltage range and high efficiency make it ideal for converting 12V or 24V bus voltages to lower logic rails. The device is also suitable for LED lighting applications, where constant current regulation is required. When designing with the L7985TR, it is important to select the appropriate inductor and output capacitor values to ensure stable operation. The datasheet provides a detailed design procedure and recommended component values for various output voltages and currents. Additionally, proper PCB layout is critical to minimize parasitic inductance and ensure reliable performance.
L7986A - 3A 61V Step-Down Switching Regulator | STMicroelectronics
The STMicroelectronics L7986A is a step-down switching regulator with an input voltage range of 4.5V to 61V and a maximum output current of 3A. It is available in a HSOP-8 package with an exposed pad for enhanced thermal performance. The device integrates a 250mOhm high-side MOSFET, enabling high efficiency in a compact footprint. A step-down switching regulator, also known as a buck converter, is a type of DC-DC converter that steps down a higher input voltage to a lower output voltage with high efficiency. Unlike linear regulators, which dissipate excess power as heat, switching regulators use an inductor and a switch to transfer energy in discrete packets, achieving efficiencies often above 90%. The L7986A belongs to the family of power management ICs, specifically DC-DC converters, which are essential in systems requiring voltage conversion with minimal power loss. Key features of the L7986A include a 250kHz fixed switching frequency, an internal compensation network, and a power-good (PGOOD) open-drain output for monitoring output voltage status. The device also offers a soft-start function to limit inrush current during startup, and a thermal shutdown protection to prevent damage from overheating. The high input voltage capability of 61V makes it suitable for automotive and industrial applications where the supply rail can experience transients. The L7986A uses a current-mode control architecture, which provides fast transient response and simplifies loop compensation. The internal high-side MOSFET has a low on-resistance of 250mOhm, reducing conduction losses and improving efficiency at high load currents. The device operates at a fixed 250kHz switching frequency, balancing efficiency and external component size. The HSOP-8 package with exposed pad ensures efficient heat dissipation, allowing the regulator to deliver full 3A output current without additional heatsinking in many applications. Typical applications include automotive power supplies, industrial control systems, and distributed power architectures. In automotive systems, the wide input range accommodates 12V and 24V battery systems, while the high efficiency reduces thermal stress. In industrial settings, the regulator can step down 48V rails to lower voltages for logic and sensor circuits. The PGOOD output simplifies power sequencing in multi-rail systems. When designing with the L7986A, ensure proper PCB layout with short, wide traces for high-current paths and adequate copper area for the exposed pad to dissipate heat. The input and output capacitors should be placed close to the IC to minimize parasitic inductance. The soft-start capacitor value determines the startup time and inrush current, which should be selected based on the load requirements.
L7986TR - 3A 61V Step-Down Switching Regulator | STMicroelectronics
The STMicroelectronics L7986TR is a step-down switching regulator with an input voltage range of 4.5V to 61V and a maximum output current of 3A. It is available in a HSOP-8 package with exposed pad, designed for high-efficiency power conversion in industrial and automotive applications. Data verified as of 2026-08-05. A step-down (buck) switching regulator is a type of DC-DC converter that efficiently reduces a higher input voltage to a lower output voltage. Unlike linear regulators, which dissipate excess power as heat, switching regulators use an inductor and switch to transfer energy in pulses, achieving efficiencies often above 90%. This makes them essential in power management systems where thermal budget and battery life are critical, such as in industrial control, automotive electronics, and distributed power architectures. Key features of the L7986TR include a 250 kHz fixed switching frequency, an internal power MOSFET, and a high-voltage capability up to 61V. The device offers a low dropout operation and a wide output voltage range from 0.6V to VIN, making it versatile for various rail requirements. It also includes built-in protection features such as thermal shutdown, current limiting, and an enable pin for power sequencing. The L7986TR uses a current-mode control architecture, providing fast transient response and stable operation with a wide range of output capacitors. The internal compensation simplifies design, reducing external component count. The HSOP-8 package with exposed pad enhances thermal performance, allowing the device to deliver full 3A output current without excessive junction temperature rise when properly laid out. Typical applications include industrial 24V bus systems, automotive power supplies, and point-of-load converters. The wide input range and high efficiency make it suitable for pre-regulation in multi-rail systems, where it can step down a high-voltage bus to an intermediate rail for downstream linear regulators or low-voltage switching converters. When designing with the L7986TR, ensure proper input and output capacitor selection and adequate PCB copper area for thermal dissipation. The enable pin allows for controlled startup sequencing in multi-rail systems, which is critical for processor-based designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the ST datasheet, providing a comprehensive resource for engineers evaluating the L7986TR.
L7987 - 61V 3A Async Step-Down DC/DC Converter | STMicroelectronics
The STMicroelectronics L7987 is a 61 V, 3 A asynchronous step-down monolithic switching regulator in a 16-pin HTSSOP (exposed pad) package. The output voltage is adjustable from 0.8 V to VIN, and the wide 100% duty-cycle input span meets fail-safe requirements for industrial systems. The device embeds a high-side N-channel power MOSFET and a low-side driver for an external diode, achieving typical efficiencies in the 90% range across most of the load curve. A step-down (buck) switching regulator is a DC/DC converter topology that produces a lower output voltage from a higher input voltage by switching an inductor-capacitor filter at high frequency. Asynchronous buck regulators use a Schottky diode for the freewheeling path instead of a second MOSFET, trading a small amount of efficiency for simplicity and lower BOM cost. Buck regulators sit within the broader power-management hierarchy: switching regulator -> DC/DC converter -> voltage regulator -> power management IC. They are preferred over linear regulators (LDOs) whenever the input-to-output voltage differential or load current is large enough that linear efficiency would be unacceptably low. Key features of the L7987 include a fixed 250 kHz switching frequency (adjustable with an external resistor from 250 kHz to 1500 kHz), external synchronization input (SYNCH pin), embedded switchover on the VBIAS pin that maximizes efficiency at light load, adjustable current limitation, and thermal shutdown. The 16-HTSSOP exposed pad keeps junction-to-ambient thermal resistance low enough to dissipate multi-watt loads without an external heatsink. The architecture uses peak-current-mode control, which simplifies loop compensation and provides inherent input-voltage feed-forward. Typical applications include industrial 24 V/48 V bus regulation, distributed point-of-load conversion, battery-powered equipment, and any system where a wide input voltage range and high efficiency must coexist in a compact 16-pin surface-mount footprint. When laying out this device, place the input bypass capacitor and the bootstrap capacitor directly at their respective pins, keep the high-current loop area minimal, and stitch thermal vias into the exposed pad to pull heat into the inner copper planes.
L7987LTR - 3A 61V Step-Down Switching Regulator | STMicroelectronics
The STMicroelectronics L7987LTR is a step-down switching regulator (buck converter) capable of delivering up to 3A of continuous output current from a wide input voltage range of 4.5V to 61V. Housed in a compact HTSSOP-16 package with exposed pad, this device integrates a high-side power MOSFET and provides excellent efficiency for industrial, automotive, and general-purpose power conversion applications. A buck converter, also known as a step-down switching regulator, is a type of DC-DC converter that efficiently reduces a higher input voltage to a lower output voltage. Unlike linear regulators, which dissipate excess power as heat, buck converters use switching elements (transistors) and energy storage components (inductors and capacitors) to achieve high efficiency, often exceeding 90%. This makes them essential in power management systems where thermal constraints and battery life are critical. The L7987LTR belongs to the broader category of switching regulators, which are a subset of voltage regulators within power management ICs. Key features of the L7987LTR include a programmable switching frequency from 250 kHz to 1 MHz, allowing designers to optimize efficiency versus component size. It offers a low quiescent current of 1.3 mA in light-load conditions, making it suitable for battery-powered applications. The device also features an internal compensation network, simplifying the design process, and includes a power-good flag for system monitoring. Its wide input voltage range of up to 61V makes it ideal for automotive systems that must withstand load-dump transients. The L7987LTR utilizes a current-mode control architecture, providing fast transient response and stable operation over a wide range of output voltages. The integrated high-side MOSFET reduces external component count and PCB area. The device is available in a thermally enhanced HTSSOP-16 package, which offers a low thermal resistance of 40°C/W, enabling efficient heat dissipation in high-power applications. Typical applications include industrial power supplies, automotive infotainment systems, distributed power architectures, and battery chargers. Its ability to handle high input voltages and deliver 3A output makes it a versatile choice for point-of-load regulation in harsh environments. When designing with the L7987LTR, ensure proper PCB layout with short, low-inductance paths for the switching node and adequate copper area for thermal management. The exposed pad should be soldered to a large ground plane to maximize heat dissipation. Additionally, select an inductor with a saturation current rating above the peak switch current to avoid core saturation.
L9177ATR - Automotive Quad High-Side Driver | STMicroelectronics
The L9177ATR is an automotive-grade quad high-side driver from STMicroelectronics, designed to control resistive, inductive, and capacitive loads in 12V automotive systems. It integrates four independent high-side power switches with built-in protection features, making it suitable for driving relays, solenoids, lamps, and LEDs in body control modules, lighting systems, and motor control applications. The device operates from a supply voltage range of 5.5V to 18V, with a typical output current capability of 0.5A per channel, and is available in a PowerSO-20 package with exposed pad for enhanced thermal performance. A high-side driver is a type of power switch that connects the load to the positive supply rail, providing a simple and safe interface between a microcontroller and high-current loads. In automotive electronics, high-side drivers are essential for controlling actuators and lamps while offering diagnostic feedback and protection against short circuits, overcurrent, and overtemperature. The L9177ATR belongs to the family of smart power switches, which integrate power MOSFETs with control logic and protection circuitry on a single chip, reducing component count and improving system reliability. Key features of the L9177ATR include four independent high-side outputs with built-in overcurrent protection, short-circuit protection, and thermal shutdown. Each channel provides a typical on-resistance of 0.5 ohm, ensuring efficient power delivery with minimal voltage drop. The device also includes a serial peripheral interface (SPI) for advanced diagnostics and control, allowing the microcontroller to read fault status and control each channel individually. The operating temperature range of -40°C to +150°C makes it suitable for harsh automotive environments. The L9177ATR utilizes a robust BCD (Bipolar-CMOS-DMOS) process technology, which combines high-voltage capability with low power consumption and fast switching. The integrated protection features ensure safe operation under fault conditions, while the SPI interface enables real-time monitoring and control. The device is AEC-Q100 qualified, meeting the stringent quality and reliability standards required for automotive applications. Typical applications include automotive body control modules, interior and exterior lighting control, relay and solenoid drivers, and motor control in power windows and seats. The L9177ATR is also used in industrial automation and smart home systems where high-side switching with diagnostics is required. Its wide supply voltage range and robust protection make it a versatile choice for various load-driving applications. When designing with the L9177ATR, ensure proper PCB layout with adequate copper area for thermal dissipation, especially when driving multiple channels at high current. The exposed pad should be soldered to a thermal via array to improve heat transfer. Additionally, place a 100nF decoupling capacitor close to the VCC pin and a 10uF bulk capacitor on the supply rail to handle inrush currents.
L9300TU80T-TR - 80V Automotive Ignition IGBT Driver | STMicroelectronics
The STMicroelectronics L9300TU80T-TR is a high-voltage, automotive-grade ignition IGBT driver designed for direct injection and coil-on-plug ignition systems. It integrates a robust gate driver with an 80V rated output stage, capable of driving high-current IGBTs in harsh automotive environments. The device is housed in a compact surface-mount package, enabling dense engine control unit (ECU) layouts. An ignition IGBT driver is a specialized power management IC that provides the high-current, high-voltage gate drive required to switch ignition coils in internal combustion engines. It sits between the engine control unit's logic signals and the power IGBT, translating low-voltage control signals into the high-current pulses needed to charge and fire the ignition coil. This component is part of the broader power management IC hierarchy, specifically within the automotive power driver category, and is essential for reliable spark generation in modern vehicles. Key features include an 80V operating voltage, integrated protection features such as overcurrent and overtemperature shutdown, and a high-current gate drive capability. The device is AEC-Q100 qualified, ensuring reliability under extreme temperature and vibration conditions. Its low quiescent current and fast switching speeds contribute to efficient and precise ignition timing, reducing emissions and improving fuel economy. Technically, the L9300TU80T-TR employs a smart power architecture that combines logic, protection, and high-voltage output stages on a single die. This integration minimizes external component count and enhances system reliability. The driver supports both current and voltage sensing, enabling closed-loop control for optimal ignition energy delivery. Its robust ESD protection and short-circuit handling make it suitable for demanding automotive applications. Typical applications include direct injection engines, coil-on-plug ignition systems, and other high-voltage automotive actuators. The device's ability to drive large capacitive loads with minimal propagation delay ensures consistent spark timing across all engine operating conditions. Its wide operating temperature range (-40°C to +150°C) allows placement near the engine block without additional cooling. When designing with this driver, ensure adequate PCB copper area for heat dissipation, as high switching currents generate significant thermal energy. Proper gate resistor selection is critical to control switching speed and minimize EMI. The device's integrated protection features reduce the need for external clamping circuits, simplifying the overall design.
L9369 - Automotive H-Bridge Gate Driver | STMicroelectronics
The L9369 is a highly integrated automotive H-bridge gate driver IC from STMicroelectronics, designed for driving external N-channel MOSFETs in DC motor control and solenoid actuation applications. It operates from a supply voltage range of 5.5V to 40V and provides two half-bridge outputs capable of driving high-side and low-side MOSFETs with programmable gate drive currents. The device integrates a serial peripheral interface (SPI) for configuration and diagnostics, making it suitable for advanced automotive body control modules. An H-bridge gate driver is a power management IC that controls the gates of four external MOSFETs arranged in an H-bridge topology, enabling bidirectional current flow through a load such as a DC motor. It translates low-voltage logic signals into high-current gate drive pulses, providing the necessary voltage and current to switch the MOSFETs efficiently. In the system hierarchy, the L9369 sits between the microcontroller (MCU) and the power stage, acting as an interface that offloads high-current switching tasks from the MCU while adding protection and diagnostic features. Key features of the L9369 include a wide operating voltage range, programmable gate drive current for optimized switching performance, and comprehensive diagnostic functions via SPI. The device supports both high-side and low-side MOSFET drivers with adaptive dead-time control to prevent shoot-through currents. It also includes overcurrent, overtemperature, and undervoltage lockout protections, enhancing system reliability in harsh automotive environments. From a technical architecture perspective, the L9369 integrates charge pumps for high-side gate drive, level shifters for high-voltage domains, and a SPI-compatible interface for register-based control. The device is fabricated using STMicroelectronics' BCD (Bipolar-CMOS-DMOS) technology, which combines low-power logic with high-voltage power handling. This allows the L9369 to operate directly from automotive battery voltages while maintaining low quiescent current in standby mode. Typical applications include automotive DC motor control for window lifts, sunroofs, and seat adjustment, as well as solenoid actuation for transmission control and fuel injection systems. The L9369's robust protection features and SPI diagnostics make it ideal for safety-critical systems where fault detection and reporting are essential. When designing with the L9369, ensure proper PCB layout with adequate copper area for thermal dissipation, and place decoupling capacitors close to the supply pins. The SPI interface should be isolated from high-current traces to minimize noise coupling. Additionally, the gate drive current settings must be matched to the external MOSFETs' gate charge to achieve optimal switching performance and minimize EMI.
L9369-TR - Automotive H-Bridge Driver for Electric Parking Brake | STMicroelectronics
The L9369-TR is an automotive-grade H-bridge driver IC from STMicroelectronics, specifically designed for electric parking braking (EPB) systems. It integrates two H-bridge driver stages to drive 8 external FETs for rear wheel brake actuators, supporting both cable-puller and Motor Gear Unit (MGU) configurations. The device is housed in a 64-pin LQFP (10x10 mm) package and operates from a supply voltage range of 5.5 V to 28 V, with a peak output current of 8.5 A per H-bridge. An H-bridge driver is a power management IC that controls the direction and speed of a DC motor by selectively turning on four transistors in an H-shaped configuration. It is a type of motor driver, which falls under the broader category of power management ICs. The L9369-TR is specifically designed for automotive applications, meeting the stringent AEC-Q100 qualification standard for reliability in harsh environments. Key features of the L9369-TR include a low RDS(on) of 0.15 ohm per switch, which minimizes power dissipation and improves efficiency. It also features a built-in current sense amplifier for precise motor current monitoring, and a SPI interface for advanced diagnostics and control. The device includes comprehensive protection features such as overcurrent, overtemperature, and undervoltage lockout, ensuring robust operation in automotive systems. The L9369-TR utilizes a smart power technology that integrates the power stage with control logic and protection circuits on a single die. This integration reduces external component count and improves system reliability. The SPI interface allows for real-time monitoring of fault conditions and precise control of the motor, making it suitable for advanced driver assistance systems (ADAS) and body control modules. Typical applications include electric parking brakes, electric power steering (EPS), electronic stability control (ESC), and active suspension systems. The device is also used in HVAC blower motors, cooling fan control, and window lift modules. Its high current capability and robust protection make it ideal for driving brushed DC motors in automotive environments. When designing with the L9369-TR, it is essential to ensure proper PCB layout with adequate copper area for heat dissipation. The 64-LQFP package has a thermal resistance of 25 C/W, so a heatsink or large copper pour is recommended for continuous high-current operation. Additionally, the SPI interface should be configured correctly to enable fault reporting and diagnostic functions.
L9370 - Automotive Electric Parking Brake IC | STMicroelectronics
The L9370 from STMicroelectronics is a specialized automotive IC designed for electric parking braking (EPB) systems, supporting both cable-puller and Motor Gear Unit (MGU) configurations. It integrates two H-bridge driver stages to drive eight external FETs for rear wheel brake actuators, enabling precise and reliable parking brake control. The device is housed in a 64-pin TQFP (10x10 mm) package, suitable for surface-mount assembly in automotive electronic control units (ECUs). An electric parking brake (EPB) is an automated parking brake system that replaces the traditional mechanical handbrake with electronic controls. The L9370 is a motor driver IC that sits between the vehicle's microcontroller and the brake actuator motors, providing the high-current H-bridge switching needed to drive the motors in both directions. In the broader system hierarchy, the L9370 is a specialized motor driver within the automotive power management and actuation domain, working alongside microcontrollers, power supplies, and sensor interfaces to deliver safe and reliable parking brake operation. Key features of the L9370 include dual H-bridge driver stages capable of driving eight external FETs, enabling bidirectional motor control for brake apply and release. The device is designed for automotive environments, with support for VDA 3.0 compliance (as noted in ST community discussions), ensuring compatibility with industry-standard safety and communication protocols. The 64-pin TQFP package offers a compact footprint while providing adequate thermal performance for automotive under-hood or in-cabin mounting. Technically, the L9370 integrates gate driver circuitry for the external FETs, with the gate driver block being identical to that of the L9369, another ST automotive IC. This design reuse ensures proven performance and simplifies qualification. The device operates over an extended automotive temperature range, typically -40°C to +125°C, and is designed to meet stringent automotive reliability standards, including AEC-Q100 qualification (though this should be verified from the datasheet). Typical applications include electric parking brake systems in passenger cars and light commercial vehicles, where the L9370 drives the brake actuator motors in cable-puller or MGU configurations. It is also suitable for other automotive actuation applications requiring dual H-bridge motor control, such as electronic stability control (ESC) or adaptive cruise control (ACC) actuators. When designing with the L9370, ensure proper thermal management by providing adequate copper area on the PCB for heat dissipation, especially when driving high-current motors. Also, implement robust EMI filtering on the motor supply lines to prevent interference with other vehicle electronics. The device requires careful layout of the high-current paths to minimize parasitic inductance and ensure reliable switching.