Power Management
Subcategories
Products (2,800+)
RT8077GQW - 2A, 2MHz Sync Step-Down Converter | Richtek
The Richtek RT8077GQW is a high-efficiency, 2 MHz synchronous step-down DC/DC converter that delivers up to 2 A of output current from a 2.6 V to 5.5 V input rail, packaged in an 8-pin WDFN (2x2 mm) with an exposed thermal pad. It provides an adjustable regulated output from 0.8 V to 5 V, an internal synchronous power stage that eliminates the need for an external Schottky diode, and a switching frequency programmable up to 2 MHz via an external resistor. The 100% maximum duty cycle allows low-dropout operation, which extends runtime in battery-powered portable systems where headroom shrinks as the cell discharges. A synchronous buck converter (also called a step-down switching regulator) is a switched-mode power supply topology that converts a higher DC input voltage to a lower DC output voltage using two MOSFET switches, an inductor, and output capacitance. Compared to linear regulators, buck converters achieve 90-95% efficiency at moderate load currents because they cycle energy through an inductor rather than dissipating it as heat. Synchronous buck converters replace the conventional rectifier diode with a low-Rdson MOSFET to further reduce conduction loss. Within the power management IC hierarchy, this places the RT8077GQW in the DC-DC converter family, which sits above simple LDO regulators and below system PMICs in terms of integration and complexity. Key features include 2 A continuous output current, a programmable switching frequency up to 2 MHz (which keeps the inductor and capacitors very small), 100% duty-cycle low-dropout operation, internal soft-start, cycle-by-cycle current limit, and thermal shutdown. The exposed-pad WDFN-8 package provides a low thermal resistance path, enabling 2 A delivery without an external heatsink in typical 3.3 V to 1.8 V or 3.3 V to 1.2 V point-of-load applications. The RT8077GQW uses a peak current-mode control architecture with internal compensation, which simplifies the external BOM to a minimum of five components: input capacitor, output capacitor, inductor, feedback resistor divider, and frequency-setting resistor. The high 2 MHz switching frequency minimizes output ripple and allows the use of a small 1 µH to 2.2 µH chip inductor, which is essential in space-constrained portable and wearable designs. Typical applications include single-cell Li-ion powered portable devices, USB-powered peripherals, set-top box and HDTV point-of-load rails, solid-state drive (SSD) power, and FPGA/CPU core voltage generation in 5 V input systems. The wide 2.6 V to 5.5 V input covers both USB 5 V and single-cell Li-ion (3.0 V to 4.2 V) rails directly without a pre-regulator. When designing with this part, select the inductor based on the chosen switching frequency and ripple target - typically 1 µH to 2.2 µH at 2 MHz with less than 30% peak-to-peak inductor current ripple. Place the input ceramic capacitor as close as possible to the PGND and VIN pins to minimize switching-node ringing. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
RT8299AZSP - 3A, 24V Synchronous Step-Down Converter | Richtek
The Richtek RT8299AZSP is a 3 A continuous-output, 24 V synchronous step-down DC/DC converter with internal power MOSFETs, packaged in an 8-pin SOP with exposed pad (SOP-8EP). It operates from a 3 V to 24 V input range, delivers an adjustable 0.8 V to 15 V output, and switches at a fixed 500 kHz, balancing small external magnetics with respectable transient response. Current-mode control with cycle-by-cycle current limit is used for short-circuit protection and loop stability. What is a synchronous step-down converter? A synchronous buck regulator is a type of switched-mode power supply (SMPS) that uses both a high-side and a low-side MOSFET (often integrated) to convert a higher DC input voltage to a lower DC output voltage. Compared to an asynchronous buck (with a freewheeling diode), a synchronous buck replaces the diode with a MOSFET, which dramatically reduces conduction loss, raises efficiency (typically 90%+), and eliminates the rectifier reverse-recovery loss. Within the broader taxonomy, a buck converter is a DC/DC converter, which is a sub-category of voltage regulator, itself part of power management ICs. The RT8299 family is targeted at distributed point-of-load (POL) rails where high efficiency at moderate current is required. Key specifications include the 3 V-24 V input range, 0.8 V-15 V adjustable output, 3 A continuous load, fixed 500 kHz switching frequency, internal high-side and low-side MOSFETs, and SOP-8EP package with an exposed thermal pad for improved heat spreading. Current-mode control eases loop compensation, while internal soft-start reduces inrush current at power-up. Architecturally, the RT8299 integrates a high-side N-MOSFET, a low-side N-MOSFET, a 0.8 V reference, an error amplifier, a PWM controller, and protection circuitry (OCP, OVP, UVLO, thermal shutdown) into one die. The exposed pad on the SOP-8EP package reduces thermal resistance to roughly 40 C/W (per the manufacturer datasheet thermal table), enabling full 3 A output at elevated ambient temperatures with proper board layout. Typical applications include 12 V bus to 3.3 V/5 V point-of-load conversion for industrial controllers, consumer electronics (set-top boxes, LCD TVs), USB Type-C powered devices, distributed POL supplies in networking equipment, and battery-powered systems running from 2- to 4-cell Li-ion packs (8.4 V-16.8 V nominal). At light loads the device still operates in forced-PWM, so efficiency is moderate at very low currents. When designing with the RT8299AZSP, choose an inductor with low DCR (typically 2.2 µH to 4.7 µH), use ceramic input and output capacitors rated for the switching ripple current, and keep the high-current loop (IN-SW-PGND) tight on the PCB. Ensure the exposed pad is soldered to a copper area of at least 1 sq inch for the full 3 A continuous rating. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design guidance not found in the manufacturer datasheet.
RT8462GS - High-Voltage LED Driver Controller | Richtek | Buck/Boost
The Richtek RT8462GS is a high-voltage, high-current LED driver controller built on a current-mode PWM architecture that drives an external MOSFET for high-power LED applications. The device integrates a 36 V rated input section with an output stage capable of 60 V, supports step-down (Buck), step-up (Boost), and step-down/step-up (Buck-Boost) topologies from a single 14-SOP package, and provides analog plus PWM dimming capability. Operating at a fixed switching frequency up to 1 MHz, the RT8462GS gives designers flexibility to optimize the inductor and EMI filter while still meeting tight current regulation across the load range. An LED driver controller is a power management integrated circuit (PMIC) that regulates the current flowing through a string of high-brightness LEDs. It belongs to the broader hierarchy of LED drivers -> power management IC -> power management -> semiconductor. Unlike a fixed-voltage regulator that targets a DC rail, an LED driver maintains constant current so that LED brightness and color temperature stay consistent regardless of supply variation, temperature drift, or forward-voltage bin spread. Key features of the RT8462GS include a low-side current sense amplifier with programmable threshold, an internal soft-start to limit inrush current, under-voltage lockout (UVLO), over-current protection (OCP), and over-temperature protection (OTP). The analog dimming input accepts a 0 to 1.2 V DC signal and the PWM dimming input accepts a TTL-level duty cycle from 100 Hz to 20 kHz, both supporting high-contrast dimming ratios needed for display backlight and architectural lighting. The RT8462GS uses peak current-mode control with a transconductance error amplifier referenced to an internal bandgap. The high-side gate driver output swings to the BST pin voltage, allowing use with logic-level N-channel MOSFETs. This topology provides simple loop compensation with a single Type-II network and inherent cycle-by-cycle current limiting. Typical applications include LCD monitor and TV LED backlight drivers, automotive interior and exterior lighting, architectural and stage lighting fixtures, and high-power portable lighting where efficiency and dimming flexibility matter. When designing with the RT8462GS, choose the external MOSFET and inductor to match the LED string current and switching frequency; ensure the BST capacitor and gate-drive resistor are sized per the manufacturer's typical application circuit. Provide adequate PCB copper for the power-stage ground return and route the current-sense traces as a Kelvin connection to avoid ground bounce. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet summary.
RT8475GS - 36V 350kHz LED Driver PWM Controller | Richtek
The Richtek RT8475GS is a current-mode PWM controller IC designed to drive an external MOSFET for high-current LED applications, housed in a 14-pin SOP (Small-Outline Package). With a current-sense amplifier threshold of 190 mV and a maximum operating input voltage of 36 V, the device supports output voltages up to 90 V, making it ideal for buck, boost, and buck-boost topologies in lighting and backlight designs. Typical switching frequency is 350 kHz, with an analog and PWM dimming control interface for brightness adjustment. An LED driver controller is a specialized power management IC that regulates the brightness of solid-state light sources by controlling the current flowing through one or more LEDs. Unlike simple resistor-based current limiters, an LED driver maintains constant current regardless of input voltage variation, temperature drift, or forward-voltage spread between LED batches. The RT8475GS falls into the PWM-controller sub-category of LED drivers (LED driver controller -> LED driver -> power management IC -> semiconductor), where it generates a PWM gate-drive signal for an external switching MOSFET rather than integrating the switch itself - giving designers freedom to choose MOSFET RDS(on), package, and thermal performance for high-power strings. Key features of the RT8475GS include analog and PWM dimming capability, a 350 kHz typical switching frequency that balances magnetics size against switching loss, and an enable/soft-start pin for controlled startup. The 190 mV low-side current-sense threshold minimizes losses on the sense resistor while preserving regulation, and the wide VIN range (4.5 V to 36 V) accommodates both 5 V/12 V bus systems and 24 V industrial rails. Analog dimming is supported via a linear DIM input, while PWM dimming accepts an external logic signal for high-contrast dimming ratios exceeding 1000:1. The RT8475GS uses a peak-current-mode control architecture with internal slope compensation, providing good line rejection, simple loop compensation, and cycle-by-cycle current limiting. The external MOSFET topology means designers can scale LED current simply by selecting a lower-inductance sense resistor (RSNS = 190 mV / ILED) - a critical advantage over integrated-switch LED drivers when currents exceed 1 A or when thermal budgets require spreading heat across the PCB rather than concentrating it inside the IC. Typical applications include high-brightness LED backlighting for LCD panels, architectural and stage lighting, automotive interior/exterior lighting, signage illumination, and DC/DC LED drivers in industrial machine-vision systems. The wide VIN range also suits portable lighting and battery-powered torches when paired with a boost topology. When designing with this controller, select the external MOSFET and inductor based on peak LED current, switching frequency (350 kHz), and maximum VIN. The sense resistor must be a low-inductance, low-drift type (1% tolerance or better), and the loop bandwidth should remain well below the switching frequency to avoid subharmonic oscillation when operating above 50% duty cycle. This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the same Richtek controller family, and practical design notes not found in the manufacturer datasheet.
RT8475ZS - 350kHz LED Driver Buck/Boost Controller | Richtek
The Richtek RT8475ZS is a 350 kHz constant-current LED driver controller with one DC-DC output supporting both step-down (Buck) and step-up (Boost) topologies, housed in a 14-pin SOP (Small Outline Package) with 3.90 mm body width. The device integrates analog and PWM dimming interfaces, making it suitable for driving high-brightness LED strings from a wide range of input voltages. According to distributor catalog descriptions, it functions as a PMIC LED Driver IC 1-Output DC-DC Controller with analog/PWM dimming in a 14-SOP package. An LED driver controller is a power management IC that regulates current through one or more strings of LEDs, maintaining brightness uniformity and protecting the LEDs from overcurrent conditions. In the broader taxonomy, LED driver controllers belong to PMIC -> power management IC -> driver IC -> constant-current regulator -> semiconductor. By regulating current rather than voltage, these controllers compensate for variations in LED forward voltage (Vf), temperature drift, and aging, ensuring consistent lumen output across the operating range. Key features of the RT8475ZS include its 350 kHz switching frequency, which keeps the converter above the AM band and allows compact inductor selection, and its dual topology flexibility (Buck or Boost) that lets a single part handle both step-down and step-up LED strings. The controller supports both analog dimming and PWM dimming, allowing brightness control from either a DC level or a duty-cycle signal for high-contrast dimming down to sub-1% levels. The 14-SOP package provides adequate thermal dissipation in surface-mount designs and supports standard reflow profiles. The RT8475ZS uses Richtek's proprietary constant-current control architecture to regulate the high-side MOSFET switch current through an external sense resistor, achieving cycle-by-cycle current limiting. The 350 kHz oscillator is internally trimmed, eliminating the need for an external RT resistor, and the dual dimming inputs (ADIM and PDIM) interface easily to microcontrollers or analog reference voltages. A typical application circuit uses an N-channel MOSFET, a Schottky diode, an inductor, and a sense resistor to form a complete buck or boost LED driver capable of driving strings of 1 W to 5 W LEDs. Typical applications include LED backlight drivers for LCD panels, architectural and decorative LED lighting, automotive interior lighting, and signage or indicator illumination. The wide input voltage tolerance of the controller supports both 12 V and 24 V bus systems commonly found in these applications. The analog dimming input is particularly useful for closed-loop feedback designs where ambient light sensing adjusts the LED current automatically. When designing with the RT8475ZS, ensure that the external MOSFET, inductor, and sense resistor are chosen for the target LED string voltage and current. PCB layout should minimize the loop area of the power stage to reduce EMI and use a ground plane for stable operation. The PWM dimming frequency should be selected above 100 Hz to avoid visible flicker in lighting applications. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes for the RT8475ZS, providing engineering guidance that goes beyond the standard distributor product listing.
RT9161-33PX - 300mA 3.3V LDO Regulator | Richtek | SOT-89
The Richtek RT9161-33PX is a fixed 3.3V output, 300mA low-dropout (LDO) linear voltage regulator housed in a SOT-89 surface-mount package. It belongs to the RT9161/A series of CMOS LDOs that deliver low quiescent current (typically 110 µA from zero to full load) and tight output accuracy (±2% on the 3.3V option), making it suitable for portable, battery-powered, and embedded applications where efficiency and board real-estate matter. An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. LDOs sit within the broader category hierarchy of linear regulators -> voltage regulators -> power management ICs -> semiconductors. Unlike switching regulators, an LDO introduces no switching noise onto the output rail but dissipates the difference between input and output as heat. Key features of the RT9161-33PX include a fixed 3.3V output with ±2% tolerance, 300mA continuous output current, built-in current-limit protection, thermal shutdown, and a low quiescent ground current of approximately 110 µA across the entire load range. The SOT-89 package provides an exposed die attach pad (lead frame tab) that enables reasonable power dissipation for the 300mA load class with modest copper area on the PCB. Architecturally, the RT9161-33PX is built around a CMOS pass-element topology with an internal bandgap reference and error amplifier, providing fast transient response and stable operation with low-ESR ceramic capacitors. The low dropout voltage - typically around 250 mV at full 300 mA load - allows the regulator to maintain regulation directly from a single-cell Li-ion source as it discharges. Typical applications include single-cell Li-ion powered systems, USB peripherals, microcontroller core rails, real-time-clock (RTC) backup supplies, and post-regulation stages following switching converters. Its low quiescent current makes it especially attractive for always-on power domains in IoT endpoints and wearable devices where standby drain directly governs battery life. When designing with the RT9161-33PX, observe the input/output voltage headroom for dropout, ensure the input capacitor is placed within a few millimetres of the IN pin to control input impedance, and follow SOT-89 thermal layout guidance - a small copper pour tied to the tab acts as the heatsink. This page synthesizes distributor pricing, verified drop-in alternatives in the same SOT-89 footprint, and practical design notes not consolidated in the manufacturer datasheet - useful information gain for engineers shortlisting 3.3V LDO candidates.
RT9478M - 24V 4-Switch NVDC Buck-Boost Charger | Richtek
The Richtek RT9478M is a 4-switch bidirectional buck-boost Narrow Voltage DC (NVDC) battery charge controller for 2- to 4-cell Li-ion battery packs, accepting a wide 3.8V to 24V input range and packaged in a thermally enhanced QFN package. It integrates power-path MOSFET drivers and supports USB-C Power Delivery (PD) sources, conventional AC-DC adapters, and mobile battery inputs. The device delivers up to 5A charging current and integrates a 5V NMOSFET gate driver plus an 8-bit ADC for accurate telemetry and system monitoring. A buck-boost charge controller is a switching power-supply topology that can step the input voltage either up or down to match the battery voltage, enabling seamless charging from sources whose voltage may lie above, below, or equal to the battery stack voltage. NVDC (Narrow Voltage DC) specifically refers to power-path architecture in which the system rail is held slightly above the battery voltage via a buck converter, allowing the system to operate directly from the adapter when present and seamlessly transition to battery power when unplugged. The RT9478M belongs to the Battery Management -> Multi-Cell Switching Charger family, a hypernym hierarchy of charger IC -> power management IC -> semiconductor. Key differentiating features include nine operating modes - Low Power, Performance, Active VBUS, Charging, Supplement, OTG, VAP, HiZ, and Learn - giving the system designer fine-grained control over system power states. Integrated protections include over-voltage, under-voltage, over-current, thermal shutdown, and battery temperature sensing through an external thermistor interface. The OTG (On-The-Go) mode allows the battery pack to source 5V back to a USB-C port for powering external devices, supporting modern USB-PD DRP (Dual Role Port) applications. Architecturally, the RT9478M uses a 4-switch H-bridge buck-boost topology with peak-current-mode control and adaptive dead-time insertion, achieving high efficiency across the entire input voltage range. The internal state machine coordinates the bidirectional power flow between adapter, system rail, and battery, while the integrated ADC monitors voltage, current, and temperature for both telemetry and protection. Compared to discrete solutions, the RT9478M dramatically reduces BOM count by integrating drivers, switches coordination logic, and the protection/monitoring ADC. Typical applications include USB-C PD charging for 2-4S notebook computers, power banks, portable medical equipment, industrial tablets, and drone battery stations. The wide input range makes it compatible with USB-PD 5V/9V/15V/20V profiles without requiring a separate front-end regulator. The bidirectional OTG capability also enables the same pack to power USB-PD powered accessories. When designing with the RT9478M, careful attention must be paid to inductor selection and input/output capacitor sizing to maintain stability across the buck and boost operating regions. The thermal pad must be soldered to a sufficiently large copper pour on the PCB, as the device dissipates significant power during boost-mode operation at high VIN. Designers should consult the Richtek reference design for recommended external component values. This page synthesizes the official datasheet, parametric cross-reference data, and practical design guidance for the RT9478M, providing context beyond what the manufacturer datasheet alone offers for engineers evaluating this part for a multi-cell USB-C PD application.
RT9711CGB - 80mΩ, 600mA USB High-Side Power Switch | Richtek
The Richtek RT9711CGB is a 1.5A/0.6A-rated, 80mΩ single N-MOSFET high-side power switch with FLAG output, packaged in a 5-pin SOT-23 (GB) outline. It is optimized for self-powered and bus-powered Universal Serial Bus (USB) applications and integrates a charge pump to fully enhance the internal N-channel MOSFET, providing a true 80mΩ on-resistance that meets USB voltage-drop budget requirements. A high-side power switch (also called a load switch or power distribution switch) is a semiconductor that sits between a system rail and a downstream load, providing controlled turn-on, fault protection, and isolation. In USB applications, these switches implement per-port current limiting and over-current protection, sitting above the system hierarchy as a sub-class of power management ICs (PMIC) and ultimately belonging to the broader semiconductor / integrated circuit family. The RT9711CGB features 1.5A continuous / 0.6A continuous current ratings depending on operating conditions, low quiescent current, over-current protection, over-temperature shutdown, under-voltage lockout, and an open-drain FLAG signal that asserts when a fault occurs. The low RDS(ON) of 80mΩ minimizes voltage drop and conduction loss on the VBUS rail, while the FLAG output simplifies fault reporting back to the USB host controller or system MCU. Typical applications include USB downstream ports, USB hubs, self-powered and bus-powered USB peripherals, hot-plug power rails, and any system requiring controlled load switching with fault indication. The SOT-23-5 footprint is one of the smallest USB switch packages available, enabling high port density on hub PCBs. When designing with the RT9711CGB, place input and output bypass capacitors as close to the IC as possible to suppress transient ringing during turn-on. The FLAG pin requires a pull-up resistor; an RC delay network can be added to debounce transient faults. Always observe the datasheet's SOA curve when sizing upstream protection. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
RT9718 - 30V Overvoltage Protection IC | Richtek
The Richtek RT9718 is an overvoltage protection IC designed to safeguard low-voltage systems from abnormal high input voltages up to 30V. Housed in a compact 8-pin WDFN (2x2 mm) package, the device integrates input voltage monitoring, battery voltage sensing, and charging current supervision into a single die, making it a space-efficient solution for single-cell lithium-ion battery protection circuits. An overvoltage protection IC is a battery management semiconductor that disconnects the load or charging path when the input or battery voltage exceeds a preset safe threshold, preventing damage to downstream components and the cell itself. Overvoltage protection ICs sit beneath supervisors and reset ICs in the power management hierarchy, and above discrete Zener-diode clamping solutions, delivering higher accuracy and programmable thresholds. Key specifications of the RT9718 include a wide input voltage range up to 30V maximum, internal overvoltage threshold detection, low quiescent current consumption, and integrated MOSFET control for high-side switching. The IC operates from typical 1-cell Li-ion/Li-poly battery voltages (nominally 3.0V to 4.4V) while tolerating abnormal charger insertion up to 30V without damage. The RT9718 uses a precision bandgap reference and comparator architecture to detect overvoltage conditions with millivolt-level accuracy. According to the manufacturer datasheet DS9718-05, the device latches off the internal pass element when the input voltage exceeds the programmed threshold, protecting downstream USB controllers, PMICs, and battery cells. The integrated current-sense path also monitors charging current against an externally programmable limit. Typical applications include single-cell Li-ion battery packs, USB charger front-end protection, mobile phone power-path management, handheld portable devices, and any 1S battery-powered system exposed to faulty or non-compliant adapters. The device is widely used as a discrete replacement for protection FETs combined with a separate supervisor IC. When designing with the RT9718, observe the absolute maximum input voltage of 30V and select external sense resistors to set the desired overvoltage and overcurrent trip thresholds. Place input decoupling capacitors as close to the IN pin as possible to suppress transient events. This page synthesizes distributor pricing, drop-in package-compatible alternatives, application circuit guidance, and detailed design notes that complement the Richtek datasheet for engineers evaluating the RT9718 for new designs or as a second-source part.
RTQ2183-QA - 3A 5.5V Automotive Sync Buck Converter | Richtek
The Richtek RTQ2183-QA is a 3 A automotive-grade synchronous buck converter operating from 2.5 V to 5.5 V input and producing an adjustable output from 0.6 V to 3.3 V, housed in a compact WET-VDFN-8J2L 2x1.5 (FC) package. According to the Richtek datasheet, the device integrates 65 mΩ high-side and 35 mΩ low-side power MOSFETs, switching at a nominal 2.4 MHz to minimize external inductor and capacitor size while keeping fundamental and harmonic noise out of sensitive AM-radio bands. A synchronous buck (step-down) converter is a switching DC-DC topology that uses a high-side MOSFET, a low-side synchronous rectifier, an LC output filter, and a control loop to deliver a lower regulated voltage from a higher input rail with high efficiency. Synchronous designs replace the traditional Schottky rectifier with a low-RDS(on) MOSFET to reduce conduction losses, and the RTQ2183-QA integrates both FETs inside the package for the smallest possible footprint. ACOT® (Advanced Constant On-Time) is Richtek's proprietary control architecture that delivers fast transient response without requiring loop compensation, making the part well-suited to point-of-load applications where the load steps quickly. Key specifications include 3 A continuous output current, 2.5 V to 5.5 V input range, 0.6 V to 3.3 V adjustable output, 2.4 MHz nominal switching frequency, and integrated 65 mΩ/35 mΩ MOSFETs. Comprehensive protection is built in: input undervoltage-lockout (UVLO), output undervoltage protection (UVP), output overvoltage protection (OVP), overcurrent protection (OCP) with cycle-by-cycle current limit, and over-temperature protection (OTP). The part is AEC-Q100 qualified for automotive environments. The ACOT® control loop eliminates the external compensation network typically required by peak-current-mode or voltage-mode buck converters, simplifying PCB layout and reducing BOM count. The 2.4 MHz switching frequency enables a 1 µH inductor and small ceramic output capacitors, allowing a complete 3 A point-of-load solution under 25 mm². Soft-start is internally trimmed to limit inrush current during power-up, and the device supports 100% duty-cycle operation for low-dropout conditions at VIN close to VOUT. Typical applications include automotive infotainment systems, ADAS camera/sensor rails, body electronics, USB Type-C VBUS buck regulation, and industrial 5 V distributed-bus point-of-load converters. The wide VIN range also covers USB-PD source applications, portable instrumentation, and FPGA/CPU core rails powered from a single Li-ion cell. When designing with this device, place the input ceramic capacitor within 2 mm of the VIN and PGND pins to suppress switching-node ringing, and keep the feedback trace away from the SW node to avoid noise coupling. The exposed pad must be soldered to a continuous ground plane to meet the thermal rating at 3 A continuous load. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with verified guidance for automotive buck-converter selection and PCB implementation.
RTQ2533WGQV(2) - 3A Ultra-Low Noise LDO, 6.5V, VQFN-20 | Richtek
The Richtek RTQ2533WGQV(2) is a 3 A ultra-low-noise, ultra-low-dropout (LDO) linear regulator with a 1.1 V to 6.5 V input range and adjustable output up to 5.5 V, packaged in a 20-pin VQFN (3.5 mm x 3.5 mm). It delivers 6.8 uVrms output noise at 0.8 V and 10 uVrms at 3.3 V, with 40 dB PSRR at 500 kHz and a maximum dropout of 180 mV at 3 A load. Output voltage is pin-selectable up to 3.95 V via PCB layout without external resistors, or up to 5.5 V using a resistive divider, with 1% accuracy over line, load, and temperature. An LDO (Low-Dropout) linear regulator is a type of linear voltage regulator that maintains a regulated output voltage even when the input-to-output differential approaches the minimum pass-element headroom. Within the broader product hierarchy, an LDO is a linear regulator is a voltage regulator is a power management IC. Because the pass element operates in the linear region (not switching), the LDO adds no high-frequency switching noise to the output - this is the defining advantage over switch-mode converters for noise-sensitive analog and RF rails. Key features of the RTQ2533WGQV(2) include pin-programmable output voltage that eliminates feedback resistors for the most common voltages (reducing BOM count and PCB area), an exposed thermal pad for high-current operation, internal soft-start to limit inrush current, and built-in protection including current limit and thermal shutdown. The combination of 3 A continuous load and 180 mV maximum dropout supports tight point-of-load regulation in systems where headroom is constrained. The regulator uses a PNP pass architecture with a precision bandgap reference and trimmed feedback network, achieving 1% output accuracy across the entire VIN/VOUT/load/temperature envelope. The exposed thermal pad on the VQFN-20 package provides a low thermal-resistance path (theta_JC substantially lower than theta_JA) for sustained 3 A operation without external heatsinking. Typical applications include FPGA and ASIC core/IO rail regulation, server and networking point-of-load supplies, audio codec and DAC power rails, RF transceiver local regulation, and industrial 5 V/3.3 V point-of-load conversion. The wide input range and 3 A output suit multi-rail systems where one input rail feeds several regulated outputs. When designing with this part, follow the manufacturer's PCB layout guidelines: place input and output capacitors as close as possible to the IC, use sufficient copper pour on the exposed thermal pad to keep junction temperature below 125 C, and select the output voltage via proper PCB routing as documented in the datasheet to avoid needing external resistors. This page synthesizes distributor pricing, drop-in Richtek same-family alternatives, and practical thermal/layout guidance not consolidated in the manufacturer datasheet alone, giving engineers a single source for selection and procurement decisions.
RTQ2811A - 17V/20A ACOT Buck Converter for Server POL | Richtek
The Richtek RTQ2811A is a 17V-tolerant, 20A synchronous step-down DC/DC converter built on Richtek's proprietary ACOT (Adaptive Constant On-Time) control architecture, housed in a compact QFN package with exposed thermal pad. It targets data-center server SSDs and high-density point-of-load (POL) power modules where high efficiency, fast transient response, and small PCB footprint are mandatory. The device supports an input voltage range that covers typical 12V bus rails and outputs programmable voltages well below 1V for ASIC/SoC core rails. A DC/DC buck converter (step-down switching regulator) is a type of switched-mode power supply (SMPS) that uses high-side and low-side MOSFET switches plus an LC output filter to convert a higher DC input voltage into a lower, regulated DC output voltage. Within the power management hierarchy, a buck converter sits under DC-DC converters, which sit under voltage regulators, which sit under power management ICs (PMICs), which sit under integrated circuits. The ACOT topology used in the RTQ2811A is a fast-transient variant of the constant on-time control family that minimizes output capacitance while maintaining tight DC regulation. Key differentiating features include ACOT control for sub-microsecond transient response, integrated high-side and low-side MOSFETs supporting up to 20A continuous output current, programmable switching frequency, internal compensation, and integrated protection features including OCP, OVP, UVP, and thermal shutdown. The exposed-pad QFN package keeps thermal resistance low for sustained high-current operation in confined server environments. According to the manufacturer application note AN094, the RTQ2811A is specifically designed for next-generation AI server SSDs and POL power modules. Typical applications include server/datacenter SSD power, AI accelerator cards, point-of-load modules for ASICs, FPGA core rails, networking switch ASICs, and high-current PoL converters for telecom boards. When designing, prioritize input capacitor placement adjacent to the high-side MOSFET return path and use a sufficient copper pour on the exposed pad to keep junction rise within safe limits at 20A load.
RTQ6060 - 36V Bidirectional Zero-Drift Current Monitor | Richtek
The Richtek RTQ6060 is a high-precision, bidirectional, zero-drift current monitor designed for accurate current sensing in current-reporting and system-optimization circuits. It operates over a wide common-mode voltage range of -0.3V to 36V and senses a low voltage drop of 10mV across an external shunt resistor, providing analog output that scales linearly with load current. A zero-drift current monitor is a precision analog current-sense amplifier that uses continuous auto-zeroing or chopper techniques to minimize input offset voltage and offset drift over time and temperature. This category sits within the broader hierarchy of current-sense amplifiers -> analog signal conditioning -> amplifiers -> power management ICs. Compared with traditional shunt monitors that require a 100mV full-scale drop for adequate accuracy, zero-drift topologies such as the RTQ6060 achieve comparable performance with a much smaller 10mV full-scale, dramatically reducing power dissipation in the sense resistor. Key specifications of the RTQ6060 series include an extremely low input offset voltage, near-zero offset drift, a fixed gain (variant-dependent), and an SC-70-6 surface-mount package measuring only 2.0mm x 1.25mm. The bidirectional variants (suffix A and B) support both charge and discharge monitoring, making them well suited to battery-powered systems. The combination of wide common-mode range, low sense voltage, and miniature package supports integration into high-density power-conversion, battery-management, and motor-control designs. Architecturally, the RTQ6060 uses an internal auto-zeroing chopper-stabilized input stage combined with a precision gain block and output buffer. This topology cancels the 1/f noise and offset drift that would otherwise dominate low-side measurements, while the output stage is designed to drive ADC inputs, microcontroller GPIO, or analog comparator inputs directly. Typical applications include battery fuel-gauging in portable electronics, current-sharing monitoring in multi-rail power supplies, motor stall detection in DC fan and pump drives, and over-current protection in hot-swap controllers. For telecom 48V rails, the 36V common-mode rating (with proper derating) covers the negative transients encountered during load steps. Designers should choose the sense-resistor value carefully to balance full-scale voltage (10mV typical) against ADC dynamic range, and place the sense resistor close to the shunt input pins to minimize ground-loop errors.
S-13A1A10-U5T1U3 - 1A Low Iq LDO, 1V Fixed | ABLIC
The ABLIC S-13A1A10-U5T1U3 is a 1A low-dropout CMOS linear voltage regulator with 1.0 V fixed output, housed in a 5-pin SOT-89-5 (HSOP-6 equivalent) surface-mount package. It combines high ripple rejection, low dropout voltage, and ultra-low quiescent current for energy-sensitive single-cell Li-ion and multi-cell alkaline power systems. The device is part of the ABLIC S-13A1 Series, designed using CMOS technology and qualified for portable and industrial applications. An LDO (low-dropout) linear regulator is a type of linear voltage regulator that can maintain a regulated output voltage even when the input voltage approaches the output voltage within a few hundred millivolts. Within the broader hierarchy, an LDO is a subtype of linear regulator, which itself belongs to the voltage regulator family inside the power management IC category. LDOs are preferred over switching regulators in noise-sensitive analog and RF rails because they introduce no switching ripple, at the cost of lower efficiency at large input-to-output voltage differentials. Key specifications include a 5.5 V maximum input voltage, 1 A continuous output current, low quiescent current rated in the low-microamp range for the A1 sub-family, and built-in protections for thermal shutdown, overcurrent limiting, and short-circuit protection. The S-13A1A10-U5T1U3 ships with a fixed 1.0 V output, eliminating external resistor dividers and reducing PCB footprint. Output accuracy is specified at plus or minus 1.5 percent typical, sufficient for digital logic rails and low-voltage ASIC cores. The device uses a CMOS pass element that achieves low dropout and low ground-pin current simultaneously, an advantage over older bipolar LDOs that drew higher quiescent current at full load. The internal reference and feedback network are trimmed during production, providing stable output across the -40C to +85C operating range. The exposed tab on the SOT-89-5 package provides a low thermal resistance path to PCB copper, enabling 1 A delivery without an external heatsink when the layout includes adequate copper area. Typical applications include single-cell Li-ion powered portable devices, microcontroller core rails, sensor and module supplies, USB-powered peripherals, point-of-load regulation after a switching converter, and standby rails in white goods. The 1.0 V fixed variant is commonly paired with 1.2 V or 1.8 V variants of the same family when multiple low-voltage rails are required. When designing with this part, ensure input and output ceramic capacitors placed within 2-3 mm of the device pins, use the exposed thermal pad as the primary heat-dissipation path, and respect the absolute maximum input voltage of 6.5 V (recommended 5.5 V operating maximum). For higher output voltages, select the corresponding fixed-voltage variant from the S-13A1 Series rather than attempting resistor programming on a fixed-output MPN. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical layout guidance not consolidated on any single manufacturer or distributor page.
S-13R1B33-A4T2U3 - 3.3V 150mA CMOS LDO | ABLIC | HSNT-4-B
The ABLIC S-13R1B33-A4T2U3 is a positive fixed-voltage CMOS low-dropout (LDO) linear regulator that delivers up to 150 mA of output current at a fixed 3.3 V output, integrated in a 4-pin HSNT-4-B surface-mount package with an exposed thermal pad. Designed using CMOS process technology, the part provides low dropout voltage, high output voltage accuracy, and low current consumption while integrating reverse-current protection to safeguard downstream circuitry from back-feeding through the regulator. The -A4T2U3 suffix denotes fixed 3.3 V output, the A4 package code (HSNT-4-B, 4-pin, flat-lead with exposed pad), T2 tape-and-reel orientation, and U3 production-grade temperature designation. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable DC output voltage even when the input-to-output differential is very small, often just a few hundred millivolts. LDOs belong to the broader linear regulator family, which sits alongside switching regulators inside the voltage regulator category of power management ICs. Unlike switching regulators that use energy-storage magnetics and switching pulses, an LDO dissipates excess input voltage as heat, which trades efficiency for exceptionally low output noise and high power-supply rejection ratio (PSRR). Key features of the S-13R1B33-A4T2U3 include 150 mA continuous output current, fixed 3.3 V output with high accuracy, low quiescent current consumption, and integrated reverse-current protection that prevents current flow from the output back into the input when VIN collapses. The CMOS process enables small package footprint and low standby power, while the HSNT-4-B exposed thermal pad keeps junction temperature in check at moderate ambient loads. The part is also available across the wider S-13R1 series with output voltages ranging from approximately 1.0 V to 3.6 V, all sharing the same HSNT-4-B footprint. Typical applications for the S-13R1B33-A4T2U3 include portable and battery-powered devices (sensor nodes, wearables, remote controls), IoT endpoints, low-power MCUs and BLE modules with 3.3 V rails, and as a post-filter stage after a switching DC-DC converter to deliver clean power to noise-sensitive analog blocks. The 3.3 V fixed output is especially useful for digital logic rails. When designing with this regulator, observe the maximum input voltage limit and verify that the input-output voltage differential at minimum VIN remains above the dropout specification at the worst-case 150 mA load. Place input and output ceramic bypass capacitors as close as possible to the device pins to ensure loop stability.
S-13R1B33-M5T1U3 - 150mA, 3.3V LDO | ABLIC | SOT-23-5
The ABLIC S-13R1B33-M5T1U3 is a fixed-output, low-dropout (LDO) linear voltage regulator IC delivering 3.3 V at up to 150 mA, housed in a 5-pin SOT-23-5 surface-mount package. The part is part of the S-13R1 family, built on CMOS technology, with integrated over-current protection, over-temperature (thermal shutdown) protection, and a built-in reverse-current protection circuit that prevents current flow from output back to input when VIN < VOUT. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the desired output voltage. Within the broader power-management hierarchy, an LDO belongs to the linear regulator class, which itself sits under voltage regulators and ultimately power management ICs. Unlike switching regulators, LDOs introduce no switching noise or EMI, making them ideal for noise-sensitive analog and digital loads. Key specifications include a 3.3 V fixed output with high output voltage accuracy, a maximum input voltage of 5.5 V, a typical PSRR of 70 dB at 1 kHz, and low quiescent current consumption. The dropout voltage remains low across the 150 mA load range, allowing the regulator to maintain regulation with minimal VIN-VOUT headroom and extending battery life in portable equipment. The S-13R1B33-M5T1U3 uses CMOS process technology combined with an internal reference and feedback loop, giving high-accuracy output voltage in a small SOT-23-5 footprint. The internal reverse-current protection eliminates the need for an external series protection diode, simplifying the BOM in battery-backup and rail-sequencing designs. Operating temperature range is -40C to +85C, suitable for consumer, industrial, and IoT applications. Typical applications include battery-powered IoT sensor nodes, wearable device power rails, microcontroller and Bluetooth Low Energy (BLE) module supply lines, and as a post-regulator following a switching converter to provide a low-noise rail for analog/RF circuitry. Reverse-current protection makes it well-suited for backup battery and OR-ing topologies. When designing with this part, ensure the output capacitor is a ceramic type with capacitance of at least 1.0 uF over the full operating temperature range, as required for phase compensation per the manufacturer datasheet. Keep the input-output voltage differential within the rated limits and verify thermal dissipation under maximum load and minimum VIN. This page synthesizes distributor pricing, drop-in alternatives within the same SOT-23-5 footprint, and practical design notes that complement the manufacturer datasheet, giving engineers a faster path from selection to working prototype.
SC189HSKTRT - 1.5A 1.5V Synchronous Buck | Semtech
The Semtech Corporation SC189HSKTRT is a fixed 1.5 V, 1.5 A synchronous step-down DC-DC converter in the SC-74A, SOT-753 surface-mount package. It converts an input of 2.9 V to 5.5 V into a regulated 1.5 V rail for compact electronic systems. Its 2.5 MHz switching architecture supports efficient point-of-load conversion where board area and transient response are important. A synchronous buck converter, or synchronous step-down regulator, is a DC-DC converter that uses an active high-side switch and a synchronous rectifier to transfer energy from an input rail to a lower output voltage. It belongs to the broader hierarchy of DC-DC converters, voltage regulators, power-management ICs, and semiconductors. This topology is useful when a system rail must be reduced efficiently while keeping external magnetics and board area manageable. The verified distributor data identifies the SC189HSKTRT as a positive, fixed-output, single-output buck regulator with one output, 1.5 A maximum output current, and 1.5 V output. Additional circuit details such as switching frequency, compensation approach, output capacitance requirements, startup behavior, shutdown current, efficiency curves, and thermal limits were not supplied in the verified data and therefore require confirmation from the manufacturer datasheet before design release. Its SC-74A, SOT-753 package is especially relevant to portable, embedded, and compact industrial products. A single output rail does not limit the IC to one use: it can supply core input, memory termination, communications circuitry, analog blocks, or sensor electronics when the load and voltage requirements remain within verified limits. The package also allows placement near a load to shorten sensitive supply paths and reduce distribution-board area. When designing around this device, begin with a stable 2.9 V to 5.5 V source, calculate copper and component heating at the worst sustained load, and validate startup into the selected inductor and capacitors. Because the visible search results disagree between six-pin MLPD-UT, SOT-753, and SOT23-5 descriptions, engineers should verify the exact terminal mapping and exposed-pad arrangement against the official SC189HSKTRT datasheet before layout. This product page combines verified distributor specifications, package guidance, sourcing links, and explicit data gaps to support engineering research. It distinguishes confirmed parameters from values that still require datasheet validation, reducing the risk of treating search snippets as a complete regulator design record.
SC21150ACSTRT - 1.2A Sync Buck Regulator, 5.5V Input | Semtech
The Semtech SC21150ACSTRT is a tiny, ultra-high-efficiency 1.2 A synchronous DC/DC buck regulator housed in a 6-ball WLCSP (Wafer-Level Chip-Scale Package). It accepts an input voltage range of 2.5 V to 5.5 V and delivers an adjustable output from 0.8 V to 5.5 V, making it ideal for point-of-load conversion in space-constrained portable and IoT designs. A buck converter (step-down switching regulator) is a power management IC that efficiently reduces a higher DC input voltage to a lower DC output voltage using high-frequency switching, an inductor, and output capacitance. Within the power management hierarchy, the SC21150 belongs to the synchronous buck converter family, which integrates both high-side and low-side MOSFETs to eliminate the external Schottky diode, achieving peak efficiencies typically above 90% and substantially reducing solution size compared to asynchronous topologies. Key features of the SC21150 include 1.2 A continuous output current, internal MOSFETs, a fixed or adjustable output voltage, low quiescent current suited for light-load efficiency, programmable switching frequency, and internal soft-start. Because the synchronous switch is integrated, total solution area is dominated only by the small inductor and two ceramic capacitors. Designers gain a complete POL (point-of-load) regulator with minimal external component count. Architecturally, the device uses peak-current-mode control for fast transient response and simplified loop compensation. The high-side P-channel and low-side N-channel MOSFETs are co-packaged in the WLCSP, and the controller employs adaptive synchronous rectification to maximize efficiency across the load range. Built-in protection features typically include input under-voltage lockout, over-current protection, and thermal shutdown. Typical applications include single-cell Li-ion powered portable electronics, wearables, IoT sensor nodes, USB-powered accessories, and as a post-DCDC stage for powering MCUs, FPGAs, or RF transceivers from a 3.3 V or 5 V rail. The tiny WLCSP footprint makes it especially attractive for wearables, hearables, and other compact battery-powered products. When designing with this regulator, pay careful attention to PCB layout: place the input capacitor, inductor, and output capacitor as close to the device as possible to minimize switching noise and EMI, and provide a low-impedance return path under the WLCSP balls to ensure stable operation. This page synthesizes distributor pricing, drop-in alternatives, and practical PCB design notes not consolidated in the manufacturer datasheet itself, giving engineers a single reference for evaluating SC21150ACSTRT in a new design.
SC441303MFU - NXP USB Charger Interface IC | DPAK
The NXP Semiconductors SC441303MFU is a USB charger detection and port-controller interface IC supplied in a DPAK (TO-252) surface-mount package. It is designed to identify USB charger types and coordinate current negotiation in downstream charging ports used in adapters, hubs, and embedded systems. The device integrates charger-type detection, current-limit handshake logic, and a power-path control interface to safely negotiate power with connected USB hosts or charger bricks. A USB charger interface IC is a specialized power management companion that sits between a DC input rail and a USB Type-A downstream port. Its role in the system hierarchy is: USB charger IC -> port controller -> power management IC -> interface IC -> integrated circuit. By identifying what is plugged in (legacy 500 mA, USB BC1.2, or higher-current adapters), the part enables the host system to draw the negotiated current without exceeding the port's safety limits. This is a common requirement for wall adapters, automotive chargers, and powered USB hubs. Key features include USB Battery Charging Specification 1.2 (BC1.2) compliant detection, automatic current-limit advertisement, low quiescent current draw, and integrated thermal protection. The DPAK package provides a thermal pad that allows the IC to sink moderate power dissipation directly into the PCB copper pour without requiring a discrete heatsink. The device operates from a single supply rail suitable for adapter or 12 V bus systems. From a technical perspective, the SC441303MFU implements the BC1.2 detection state machine, including the data-line contact-typing and primary/secondary detection phases. It uses an internal reference and a current-mirror scheme to set the load current advertised to the host, while a thermal foldback loop protects the IC from over-temperature events at high ambient temperatures or sustained maximum loads. Typical applications include USB wall adapters and travel chargers, 12 V automotive USB power ports, powered USB hubs, and embedded industrial chargers. It is particularly useful where USB-A ports must reliably detect and respect the negotiated current of the connected device. When designing with this part, ensure the DPAK thermal pad is soldered to a sufficiently large copper area (at least 1 square inch recommended) to keep junction temperature below the thermal shutdown threshold. Place input bypass capacitors close to the supply pin and follow the manufacturer's reference layout to minimize ground-loop noise on the detection pins.
SC4524FSETRT - 2A 18V Step-Down Switching Regulator | Semtech
The Semtech SC4524FSETRT is a 2 A, 18 V constant-frequency peak current-mode step-down switching regulator with a programmable switching frequency up to 2 MHz, adjustable positive output, and an 8-pin SOIC exposed-pad package. Its 3 V to 18 V input range supports compact point-of-load, communications, industrial, and consumer power-conversion systems. A switching regulator, commonly called a buck converter, is a DC-DC converter in an electronics power hierarchy. It reduces a higher input voltage to a lower regulated rail by rapidly switching an inductor through energy storage and energy transfer. The SC4524FSETRT uses peak current-mode control to regulate the output while providing a straightforward adjustable-output implementation. The manufacturer datasheet describes a 2 A output-current capability, a 3 V to 18 V input range, and switching frequency programmable up to 2 MHz. The adjustable output is identified as a single positive output starting at 1 V. High switching frequency permits small inductors and ceramic capacitors, helping reduce board size in distributed power, telecom, notebook-computing, and portable-equipment designs. The SC4524FSETRT is the F variant of the SC4524 regulator family. Compared with the C variant, the available comparison information identifies a 3 V to 18 V input range for the F part versus 3 V to 28 V for the C part. Because the input-voltage ceilings differ substantially, engineers should not treat those variants as interchangeable unless their complete requirements remain inside 18 V. Typical applications include 12 V-to-5 V and 5 V-to-3.3 V conversion, communications-equipment rails, portable-device power, industrial control systems, and compact embedded systems. The exposed pad improves heat transfer into the PCB copper, but thermal performance depends strongly on the thermal design and actual dissipation. For a new design, place the switching node and input loop compactly, use manufacturer-recommended inductor and capacitor values, and provide adequate copper around the exposed pad. Verify output ripple, current-limit behavior, startup transients, efficiency, and junction temperature across the full input, output, and ambient ranges. This page consolidates distributor sourcing information, verified architecture and voltage specifications, replacement guidance, and practical PCB design considerations. Because the supplied data does not establish certified drop-in equivalents or expose a complete manufacturer pin table, unresolved engineering details are marked explicitly rather than inferred.
SC600DIMLTRT - 120mA Dimming Charge-Pump LED Driver | Semtech
Semtech SC600DIMLTRT is a one-output, switched-capacitor charge-pump LED driver rated for 120 mA and packaged in a 10-lead MLPD measuring 3 x 3 mm. It accepts a 2.5 V to 6.5 V input range and offers selectable fixed outputs of 5.0 V, 4.5 V, or 4.0 V, depending on the specific device option. This version also supports LED dimming for portable-lighting and battery-powered products. A charge-pump LED driver is a power-management IC that transfers energy through switched capacitors rather than using an inductive DC-DC converter. This topology can provide a regulated LED drive voltage from a battery while avoiding the inductor used in a conventional buck or boost converter. The SC600 belongs to the LED-driver, DC-DC regulator, and power-management IC hierarchy. Key benefits include peak efficiency above 90%, short-circuit and over-temperature protection, a soft-start function, and shutdown current below 1 microamp. The small MLPD-10 package enables compact PCB layouts. The verified product listing identifies SC600DIMLTRT as a dimmable 120 mA LED driver, while the family datasheet describes 120 mA versions at 4.5 V and 4.0 V and 60 mA versions at other output settings. The SC600 uses a charge-pump topology to regulate the LED drive rail and includes selectable fixed output options. Soft start reduces the initial current surge during startup, while the protection functions improve robustness in portable applications. The exposed-pad package also requires attention to thermal layout when operating continuously near its rated current. Typical uses include battery-powered LED flashlights, portable lighting, status indicators, and compact consumer devices where a small, efficient LED drive voltage is useful. The 2.5 V to 6.5 V input range suits systems powered from one or more low-voltage cells. Dimming support makes the device relevant to products that need adjustable LED brightness. For PCB design, place the input, flying, and output capacitors close to their associated pins and follow the manufacturer’s recommended layout. Confirm the actual output-voltage option and pin configuration before placing a replacement. Keep exposed-pad copper available for thermal dissipation and verify startup, shutdown, dimming, and fault behavior in the finished system. This page consolidates verified distributor listings, the SC600 family datasheet information, package details, application guidance, and replacement-status notes. Pricing is referenced only where a verified amount was supplied; otherwise, request a current quote from XAIPART. The listed alternatives are functional comparison leads, not guaranteed drop-in replacements, because package and pin-level cross-reference data were not supplied.
SC900844JVK - 14-LDO PMIC for Ultra-Mobile Apps | NXP
The NXP SC900844JVK is a highly integrated power management IC (PMIC) designed for ultra-mobile and embedded applications. Housed in a 338-ball MAP-BGA package measuring 11x11 mm, this PMUIC integrates 5 switching regulators, 14 LDOs, 10 buck converters, and an ADC for comprehensive multi-rail power management in space-constrained designs. A power management IC (PMIC) is a single-chip semiconductor device that consolidates multiple voltage regulators, supervision functions, and often battery management onto one die to power complex SoCs, processors, and peripheral subsystems. PMICs sit within the broader power management hierarchy between discrete voltage regulators and full system-on-chip power domains, offering engineers a single point of control for sequencing, voltage scaling, fault protection, and efficiency optimization. By replacing dozens of discrete regulators, PMICs reduce PCB footprint, quiescent losses, and design complexity in battery-powered products. Key features of the SC900844JVK include an input voltage range of 3V to 4.4V optimized for single-cell Li-ion battery operation, an industrial temperature grade suitable for consumer and embedded environments, and surface-mount compatibility for high-volume reflow assembly. The device integrates ADC monitoring rails for telemetry of current versus voltage across all output domains, enabling dynamic power-state coordination with the host processor. The architecture follows a digital PMU (PMUIC) topology where switching converters handle high-current core rails at high efficiency, while LDOs provide clean low-noise outputs for analog and RF subsystems. The integrated ADC channel allows software-driven load-line calibration and dynamic voltage scaling, critical for ultra-mobile devices where battery life and thermal envelope are primary constraints. Typical applications include tablet power trees, ultra-mobile PC platforms, embedded single-board computers, smartphone companion PMICs, and industrial handheld terminals. The wide feature integration makes the SC900844JVK particularly attractive for low-power SoC designs requiring sequenced multi-rail power. Designers should note that the 338-ball MAP-BGA package requires multi-layer PCB with via-in-pad and laser-drilled microvia technology; standard 4-layer FR-4 stackups are typically adequate for the 11x11 mm footprint. Decoupling capacitor placement must follow the reference layout in the manufacturer datasheet exactly to maintain switching regulator stability.
SC900844JVKR2 - 20-Rail PMIC for Ultra-Mobile | NXP
The NXP SC900844JVKR2 is an integrated power management IC (PMIC) engineered for ultra-mobile and embedded platforms, delivering up to 20 output voltage rails from a 338-pin MAP-BGA package (11x11 mm). It combines five switching power supplies with frequencies programmable from 1.0 MHz to 4.0 MHz and fourteen highly efficient low-dropout (LDO) regulators, supplying the multi-rail voltage domains required by netbooks, tablets, smartphones, and other ultra-mobile platforms. A Power Management IC (PMIC) is a single integrated circuit that consolidates multiple DC-DC converters, LDOs, battery chargers, and supervisory functions into one package. Within the broader taxonomy it sits as: PMIC -> power management -> mixed-signal IC -> semiconductor. By collapsing what would otherwise require 8-12 discrete regulators into one BGA, the PMIC shrinks board area, reduces bill of materials, and provides centralized sequencing, monitoring, and fault response across the entire platform. Key features of the SC900844JVKR2 include five switching regulators operating between 1.0 MHz and 4.0 MHz to enable small external inductors, fourteen LDOs for low-noise analog and memory rails, ten bit-count programmable voltage control bits, and an integrated ADC for monitoring. The switching rails can be configured as buck or boost stages for core, I/O, and memory domains; the LDOs support always-on housekeeping rails. The 338-TFBGA (Thin Fine-pitch Ball Grid Array) provides dense interconnect while the 11x11 mm footprint keeps the solution area modest for tablet-class boards. Architecture-wise, the SC900844JVKR2 uses NXP/Freescale's mixed-signal PMIC platform with one-time-programmable (OTP) configuration, I2C or SPI control interfaces (per the variant), and per-rail enable and voltage-scaling support. The wide switching-frequency range (1.0-4.0 MHz) lets designers trade off inductor size against efficiency: higher frequency shrinks magnetics, lower frequency reduces switching losses. Real-time monitoring via the integrated ADC allows platform firmware to read back each rail's voltage for telemetry and fault logging. Typical applications include ultra-mobile PCs (netbooks), tablets, single-board computers (SBCs), industrial HMI panels, and embedded computing platforms requiring multiple voltage rails from a single battery or 5V/12V supply. Its 20-rail capacity and integrated ADC make it particularly suitable for designs that otherwise need a discrete regulator tree plus a separate fuel-gauge/monitor IC. When designing with the SC900844JVKR2, attention to PCB layout is critical: place input bulk capacitors within 2 mm of the BGA balls, provide at least four PCB layers with a continuous ground plane beneath the package, and follow the manufacturer's reference layout for thermal vias under the exposed die-pad area. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design considerations not duplicated in the manufacturer datasheet, giving engineers a single, queryable reference for the SC900844JVKR2 PMIC.
SCW12A-12 - 12W Isolated DC-DC Converter 9-18V In 12V Out | MEAN WELL
The MEAN WELL SCW12A-12 is a 12W isolated DC-DC converter module delivering a regulated 12V output at up to 1A (minimum load 200mA) from a 2:1 wide input range of 9V to 18V DC, housed in a five-sided shielded metal case with through-hole pins. A board-mount isolated DC-DC converter is a power module that converts one DC voltage to another while providing galvanic isolation between input and output. Within the power management hierarchy - power supply, converter module, DC-DC converter, board-mount module - these parts sit between a raw DC bus (battery, rectified AC, or another rail) and a load that needs a clean, regulated, isolated supply. Isolation prevents ground loops, breaks up common-mode noise paths, and protects downstream circuitry from upstream faults. Key features of the SCW12A-12 include 1500VDC input-to-output isolation, a built-in remote ON/OFF control for power sequencing, an integrated EMI input filter that reduces external filtering requirements, and comprehensive protection against short circuit and overload. The module is cooled by free-air convection, requiring no heatsink or forced airflow at rated load, and every unit passes a 100% full-load burn-in test before shipment. The SCW12 series uses a compact regulated single-output topology with a five-sided metal case that provides both electrostatic shielding and mechanical protection on the PCB. Regulation is maintained across the full 9V to 18V input span at rated load, making the part tolerant of battery sag and supply transients in nominal 12V systems. Typical applications include industrial control boards, distributed power architectures fed from a 12V backplane, battery-powered instrumentation, telecommunications auxiliary supplies, and any design where a small isolated 12V auxiliary or main rail is required from a 9-18V source. When designing with the SCW12A-12, observe the 200mA minimum load requirement: operating below minimum load can increase output ripple and shift regulation accuracy, so a small pre-load may be needed in light-load designs. This page synthesizes distributor pricing from 14 sources, drop-in alternatives within the SCW12 family, and practical design guidance not found in the one-page manufacturer datasheet.