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LM5176QPWPRQ1 - 55V 4-Switch Buck-Boost Controller | TI
The Texas Instruments LM5176QPWPRQ1 is an AEC-Q100 qualified synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. It operates from a 4.2 V to 55 V input (60 V absolute maximum) with a programmable switching frequency of 100 kHz to 600 kHz, in a 28-pin HTSSOP (PWP) package with PowerPAD. A buck-boost controller is a type of switching regulator that steps voltage up or down as needed. The four-switch buck-boost topology uses four external MOSFETs to transition seamlessly between buck and boost operation, making it ideal where input voltage varies above and below the output, as in automotive 12 V buses during cranking and load-dump. In the power management hierarchy: buck-boost controller -> DC-DC controller -> switching regulator -> power management IC. Key features include current-mode control in both buck and boost modes for superior load and line regulation, integrated cycle-by-cycle current limiting, output overvoltage protection, thermal shutdown, and PWM/PFM operation for improved light-load efficiency. AEC-Q100 qualification with -40C to +125C ambient operation (junction up to +150C) targets harsh automotive environments. Architecturally, the LM5176-Q1 drives external N-channel MOSFETs, allowing designers to scale output power freely. The proprietary current-mode scheme simplifies loop compensation and delivers fast transient response, while the four-switch topology maintains high efficiency across wide input-to-output ratios. Typical applications include automotive USB power delivery, battery-backup and holdup power supplies, industrial 12 V/24 V bus systems, LED drivers, and renewable energy interfaces. Its transient immunity keeps output regulation during automotive input disturbances. Design with care: keep MOSFET gate-drive loops short, place high-frequency decoupling close to the IC, and select the switching frequency to balance efficiency versus component size. Tune the compensation network for stable operation across buck, boost, and buck-boost transition regions.
LM5176QPWPTQ1 - 55V 4-Switch Buck-Boost Controller | TI
The Texas Instruments LM5176QPWPTQ1 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. It operates over a wide input voltage range of 4.2V to 55V (60V absolute maximum), making it suitable for automotive, industrial, and telecom applications. The device is offered in a 28-pin HTSSOP (PWP) surface-mount package and is AEC-Q100 qualified for automotive reliability. A buck-boost controller is a type of power management IC that maintains a regulated output voltage regardless of whether the input voltage is higher or lower than the desired output. Unlike a buck converter that steps down, or a boost converter that steps up, a 4-switch buck-boost controller uses four external MOSFETs to achieve both functions, maximizing battery usage and supporting wide input fluctuations. This makes it essential in systems like automotive cold-crank, solar power, and USB PD where the input can vary significantly. Key features include current-mode control in both buck and boost modes for superior line and load transient response, synchronous switching for high efficiency, and a wide 4.2V-55V input range. The device supports frequencies up to [DATA_NEEDED: switching frequency] and drives four external NMOS transistors. The controller also includes [DATA_NEEDED: additional features]. The LM5176QPWPTQ1 employs a 4-switch topology with a high-side and low-side MOSFET for each of the buck and boost stages. Current-mode control ensures smooth transition between modes and protects against overcurrent. The device is designed for rugged automotive environments, operating over a temperature range of [DATA_NEEDED: operating temperature]. With an exposed thermal pad, it efficiently dissipates heat in compact layouts. Typical applications include automotive 12V/24V power distribution, industrial 24V buses, USB PD hubs, battery-powered systems, telecom backplanes, and solar energy harvesters. Its wide input range and high efficiency make it a versatile choice for systems requiring a single controller for both step-up and step-down regulation. When designing with the LM5176QPWPTQ1, ensure adequate input capacitor placement reduces ripple and that the bootstrap diode/capacitor network is correctly sized for the external MOSFETs. A 4-layer PCB with a solid ground plane is recommended for optimal thermal and noise performance.
LM5180NGUR - 65V No-Opto Flyback Converter | Texas Instruments
The Texas Instruments LM5180NGUR is a 65-VIN primary-side regulated (PSR) flyback DC/DC converter with an integrated 100-V, 1.5-A power MOSFET, packaged in an 8-pin WSON (NGU) with exposed thermal pad. It delivers up to 7 W of output power from a wide 4.5 V to 65 V input range while eliminating the need for an optocoupler or TL431 feedback component across the isolation barrier. A flyback converter is an isolated switching-mode power supply (SMPS) topology that stores energy in a transformer during the switch-on period and releases it to the output during the switch-off period. The primary-side regulation (PSR) technique samples the output voltage from the auxiliary winding during the flyback interval, eliminating the secondary-side feedback loop. The LM5180 sits within the converter hierarchy as: switching regulator -> DC-DC converter -> flyback topology -> PSR flyback -> power management IC. Key features include boundary conduction mode (BCM) switching that enables valley switching and a compact magnetic solution, integrated 100-V MOSFET for line-transient headroom, and better than +/-1.5 percent load and line regulation. The device also offers internal compensation, programmable soft-start, and cycle-by-cycle overcurrent limiting. The exposed pad (EP) WSON-8 package provides low thermal resistance suitable for industrial temperature ranges. The LM5180 architecture uses peak current-mode control with built-in ramp generation for inherent input voltage feedforward, simplifying loop compensation. BCM operation reduces switching losses by turning on the MOSFET at the valley of the drain-voltage ringing, while the 100-V MOSFET rating provides ample margin for high-voltage automotive load-dump and industrial transient events. Quasi-resonant switching keeps EMI low without forcing the designer to operate at a fixed frequency. Typical applications include isolated IGBT gate-drive supplies in industrial motor drives, factory-automation analog input modules with 4-20 mA loops, automotive battery-powered HVAC systems, and bias supplies for isolated sensors and interface ICs. The wide input range suits 12-V/24-V industrial bus and 48-V telecom rail applications alike. When designing with the LM5180, choose the flyback transformer turns ratio based on minimum and maximum input voltage, then verify CCM/BCM boundary at full load. Use the TI quick-start calculator to select RFB1, RFB2, Rt, and soft-start capacitor values for the desired regulation and startup behavior. This page synthesizes distributor stock and pricing, drop-in pin-compatible alternatives, and engineering design notes not found in the standalone manufacturer datasheet.
LM536353QRNLTQ1 - 3.5A 36V Sync Step-Down DC-DC | TI Automotive
The Texas Instruments LM536353QRNLTQ1 is a 3.5-A, 36-V synchronous, 2.1-MHz, AEC-Q100-qualified automotive step-down DC-DC converter housed in a 22-pin VQFN-HR (RNL) package. It delivers a fixed 3.3V rail at 3.5A from a 3.5V to 36V input range and integrates both high-side and low-side MOSFETs, eliminating the need for an external FET bridge. The device operates at a fixed 2.1 MHz switching frequency that avoids the AM band, simplifying EMI filtering in infotainment and ADAS platforms. A synchronous buck (step-down) DC-DC converter is a switched-mode power supply topology that reduces a higher DC input voltage to a lower, well-regulated DC output voltage by rapidly switching an inductor-capacitor energy-transfer network. Within the broader hierarchy, the LM536353QRNLTQ1 belongs to: synchronous buck regulator -> step-down (buck) converter -> switched-mode DC-DC converter -> power management IC -> semiconductor. Synchronous designs replace the conventional Schottky rectifier with a low-side MOSFET, raising efficiency at moderate-to-high load currents, reducing conduction losses, and supporting tighter thermal budgets in compact automotive modules. Key features include a 3.5A continuous output current rating, a wide 3.5V to 36V (42V transient) input operating range that tolerates automotive load-dump events, 2.1 MHz fixed-frequency operation, internal high-/low-side synchronous MOSFETs, and integrated bootstrap, compensation, and soft-start circuitry. The fixed 3.3V output version (suffix "33") requires no external resistor divider, simplifying BOM and reducing PCB area. AEC-Q100 Grade 1 (TJ = -40C to +125C) qualification, plus TI's automotive-grade reliability flow, makes the part directly suitable for cabin electronics, infotainment head units, ADAS sensors, and body-control modules. Typical applications include automotive infotainment systems, ADAS sensor power rails (camera, radar, lidar front-end), body-control modules (BCM), instrument clusters, USB charging ports (Type-A/C), and always-on battery-powered subsystems. The 2.1 MHz switching frequency falls above the AM broadcast band, easing CE/RE EMI compliance for OEM vehicle platforms. When designing with the LM536353QRNLTQ1, place the input bypass ceramic (typically 10uF X7R) directly across PVIN and PGND to suppress switching spikes, and follow the datasheet's recommended copper-pour thermal layout. The exposed thermal pad must be soldered to a continuous ground plane to keep junction temperature within the AEC-Q100 envelope under worst-case load-dump conditions. This page synthesizes distributor pricing, verified drop-in alternatives within the LM53635-Q1 family, and practical layout/design notes not collected in a single location in the manufacturer datasheet.
LM536355QRNLRQ1 - 3.5A 36V Auto Sync Step-Down DC-DC | TI
The Texas Instruments LM536355QRNLRQ1 is a 3.5-A, 36-V synchronous, 2.1-MHz, automotive-qualified step-down DC-DC converter housed in a 22-pin VQFN-HR (RNL) package. It belongs to the LM53625-Q1/LM53635-Q1 family, providing a fixed 5-V output from a wide 3.5-V to 42-V input range while supporting automotive load-dump and cold-crank transients. The 2.1-MHz switching frequency keeps the fundamental and harmonics above the AM-band, eliminating the need for shielding on automotive infotament harnesses. A buck (step-down) switching regulator is a DC-DC converter topology that uses an integrated high-side MOSFET, a low-side synchronous rectifier, an inductor, and output capacitors to deliver a lower regulated voltage from a higher input rail. Buck regulators sit in the power-management hierarchy: switching regulator -> DC-DC converter -> power management IC. They outperform linear regulators at large VIN/VOUT ratios because the synchronous rectification keeps efficiency in the 80-95% range, dramatically reducing thermal dissipation in space-constrained automotive ECUs. Key features of the LM536355QRNLRQ1 include 3.5-A continuous output current, 2.1-MHz fixed-frequency operation, AEC-Q100 qualification, 18-V minimum input for a 3.3-V output (per TI product page), internal synchronous FETs, and an adjustable or fixed 5-V output option. The 22-pin VQFN-HR package exposes a thermal pad that, with proper copper area, keeps junction temperature within the 150C automotive Grade-1 limit. Advanced high-speed control loops deliver sub-1% load regulation and fast line transient response for processor rails. The LM536355QRNLRQ1 uses peak-current-mode control with internal compensation, eliminating the need for an external compensation network. The architecture supports spread-spectrum frequency modulation (optional) to ease CISPR 25 EMI compliance in automotive designs. Cycle-by-cycle current limit and thermal shutdown protect the IC from overload and short-circuit faults typical in body-electronics harnesses. Typical applications include automotive infotainment head units, ADAS camera/sensor power, instrument clusters, and body-control modules where a clean 5-V rail is required from a noisy 12-V or 24-V battery bus. The 3.5-A rating also suits USB-PD car chargers and lighting controllers. Designers also use it in industrial PoE point-of-load stages that need 5-V at high current from a 24-V bus. When designing with the LM536355QRNLRQ1, follow the datasheet recommended inductor (typically 1.0 uH to 2.2 uH) and use X7R 10 uF/25-V ceramic input capacitors plus 22 uF/10-V ceramic output capacitors to keep ripple under 30 mV. Place the input capacitors within 5 mm of the PVIN pin and the exposed pad over a 4-cm^2 top-side copper pour to control thermal resistance. This page synthesizes distributor pricing, AEC-Q100 drop-in alternatives, application block diagrams, and PCB-layout guidance not found in the manufacturer datasheet, providing an at-a-glance reference for automotive power-stage selection.
LM61440 - 4A 36V Low EMI Sync Buck Converter | TI
The Texas Instruments LM61440 is a high-performance, synchronous step-down DC-DC converter with integrated high-side and low-side MOSFETs, delivering up to 4 A of output current over a wide input voltage range of 3.0 V to 36 V with 42 V transient tolerance, easing input surge protection design. It is available in a 14-pin PowerVFQFN (RJR) package with exposed pad. A synchronous buck converter is a DC-DC step-down regulator that uses both high-side and low-side switches to efficiently convert a higher input voltage to a lower output voltage. Unlike asynchronous converters that use a diode for the low-side path, synchronous converters replace the diode with a low-resistance MOSFET, reducing conduction losses and improving efficiency at high output currents. Synchronous buck converters are a cornerstone of power management ICs, enabling compact, high-efficiency point-of-load power supplies across automotive, industrial, and networking systems. Key features of the LM61440 include soft recovery from dropout, which eliminates output overshoot when the input voltage dips close to the regulated output, ensuring stable behavior during cold-crank and sag conditions. The device incorporates pseudo-random spread spectrum to reduce peak EMI, adjustable SW node rise time to optimize the efficiency-versus-EMI trade-off, and a low-EMI VQFN-HR package with minimized switch node ringing. Technically, the LM61440 uses current-mode control with integrated compensation, providing fast transient response and stability across a wide range of output capacitors. The adjustable output goes down to 1 V, suiting modern low-voltage digital cores. The integrated MOSFETs eliminate external FETs, reducing board space and BOM complexity, while the PowerVFQFN exposed pad enables high power density designs. Typical applications include automotive power supplies, industrial control, telecom and networking equipment, and general-purpose point-of-load conversion from 12 V or 24 V rails. The wide input range and 42 V tolerance make it ideal where input spikes are common, and the low EMI features benefit automotive and communications designs with strict CISPR-class requirements. When designing with the LM61440, select input and output capacitors per the TI datasheet recommendations to maintain stability and low ripple; the adjustable SW slew rate lets you trade efficiency for EMI margin.
LM61440-Q1 - 36V, 4A Automotive Low-Noise Buck | Texas Instruments
The Texas Instruments LM61440-Q1 is an automotive-focused, high-performance DC-DC synchronous step-down converter delivering up to 4 A of output current over a wide input range of 3 V to 36 V, tolerant of 42 V transients to ease input surge protection design. It integrates high-side and low-side MOSFETs in a 14-pin HotRod VQFN-HR (RJR, PowerVFQFN) package, minimizing switch-node ringing and parasitic inductance through a parallel input path. A synchronous buck converter (also called a step-down switching regulator) is a type of DC-DC converter within the power management IC hierarchy that uses two internal switches plus an inductor to efficiently convert a higher input voltage to a regulated lower output voltage. Compared to linear regulators, synchronous buck converters achieve efficiency typically above 90%, making them the default choice for automotive and industrial point-of-load power rails. Key features include low EMI optimization for CISPR-class automotive requirements, a pin-selectable light-load mode trading efficiency versus ripple, adjustable switching frequency, and functional-safety-capable documentation to support ISO 26262 system designs. The HotRod package eliminates bond wires, reducing parasitic inductance and switch-node overshoot, which directly lowers radiated emissions. Architecturally, the LM61440-Q1 uses a current-mode control topology with integrated FETs, achieving fast transient response and simplified external component selection. The 42 V transient tolerance protects against automotive load-dump and cold-crank conditions without expensive front-end suppression circuitry. Typical applications include ADAS domain controllers, infotainment power trees, automotive body electronics, gateway modules, and industrial 24 V bus point-of-load conversion. Its wide 3 V to 36 V range covers 12 V and 24 V battery systems directly. Design tip: keep the input capacitor loop as tight as possible to the VIN and PGND pins to fully exploit the HotRod parallel input path and minimize EMI; use spread-spectrum or adjustable frequency settings to avoid sensitive radio bands. Pin-compatible family members (LM61460, 6 A) allow current-scaling without PCB redesign.
LM61440AANRJRR - 4A Low-EMI Buck Converter | Texas Instruments
The Texas Instruments LM61440AANRJRR is a 4 A synchronous step-down DC-DC converter with a 3 V to 36 V input range, 1 V adjustable output, 2.2 MHz switching frequency, and low-EMI operation. It is packaged in a 14-pin PowerVQFN and tolerates input transients to 42 V for additional surge margin. Integrated high-side and low-side MOSFETs simplify implementation and improve conversion efficiency. The LM61440 is designed for low-EMI operation and soft recovery from dropout, reducing output overshoot. Its 3 V to 36 V operating range suits industrial 24 V buses and multi-rail systems, while the adjustable output supports power rails from 1 V upward. According to the TI product page, the device delivers up to 4 A over the wide input range and uses integrated power stages to eliminate an external Schottky diode. The switching architecture is suitable for noise-sensitive analog, communications, computing, and test equipment. Designers should follow TI’s recommended input and output capacitor values, place the high-current loop compactly, and provide adequate copper for thermal dissipation. The 14-pin PowerVQFN package also requires attention to exposed-pad layout and assembly requirements. This LM61440AANRJRR is useful when a compact, high-current buck regulator is needed with integrated MOSFETs, low switching EMI, and flexible output-voltage adjustment.
LM62435BPPQRJRRQ1 - 3.5A, 36V Automotive Sync Step-Down | TI
The Texas Instruments LM62435BPPQRJRRQ1 is an automotive-qualified, high-performance, low-EMI synchronous DC-DC step-down converter delivering up to 3.5 A of continuous output current from a wide 3.0 V to 36 V input range, with 42 V transient tolerance that supports automotive load-dump events for 400 ms. Housed in a 14-pin PowerVQFN (RJY) package, it integrates both high-side and low-side MOSFETs and a fixed 3.3 V output option, and it implements soft recovery from dropout to eliminate output overshoot during line transients. A buck converter (also called a step-down switching regulator) is a switched-mode power supply topology that efficiently converts a higher DC input voltage to a lower DC output voltage by rapidly switching an inductor between charge and discharge cycles. The LM62435BPPQRJRRQ1 belongs to the synchronous buck family, meaning the freewheeling diode is replaced by a low-side FET for higher efficiency and smaller solution size. Within the broader system hierarchy, it sits as a DC-DC converter -> switching regulator -> power management IC -> semiconductor. This category dominates automotive 12 V/24 V POL rails where step-down conversion at high current and high efficiency is mandatory. Key features include up to 3.5 A continuous load, 3.0 V to 36 V operating input (42 V load-dump tolerant), integrated 65 mΩ/35 mΩ HS/LS MOSFETs, and a fixed 3.3 V output variant with adjustable cousins in the family. The device offers low-EMI operation with spread-spectrum frequency modulation, programmable switching frequency, internal compensation, and a 7 µA Iq in PFM at light load. The 14-pin PowerVQFN (RJY) package provides a low-thermal-resistance path for sustained high-current automotive operation. The architecture uses peak-current mode control with an internal compensation network, achieving fast transient response and cycle-by-cycle current limiting. The AEC-Q100 Grade 1 qualification confirms operation across -40 °C to +125 °C ambient, and the wide VIN range absorbs cold-crank and load-dump disturbances. Internal MOSFETs eliminate the need for external switches, shrinking the BOM. Typical applications include automotive infotainment systems, ADAS sensor power, body electronics and lighting, USB-PD vehicle charging ports, and industrial 24 V distributed-bus POL converters. The wide VIN also suits eMobility and battery-powered industrial equipment. Design consideration: prioritize input capacitance placement to handle load-dump transients up to 42 V, and verify the inductor saturation current exceeds the peak inductor current by at least 30% to avoid saturation during transients. A 2.2 µH to 10 µH inductor is typical; choose a lower value for smaller ripple at the cost of higher inductor peak current. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet. Source: Texas Instruments LM62435-Q1 datasheet.
LM73100RPWR - 5.5A Ideal Diode Load Switch, 2.7-23V, VQFN-HR-10 | TI
The Texas Instruments LM73100RPWR is a 2.7 V to 23 V, 5.5 A integrated ideal diode / load switch with an on-resistance of 28 mOhm (typical), housed in a 10-pin VQFN-HR (RPW) package measuring 2 mm x 2 mm. The device integrates an N-channel MOSFET, an ideal-diode controller for reverse-current blocking, and a comprehensive set of protection features including overvoltage, overcurrent, and short-circuit protection, plus thermal shutdown. What is an ideal diode? An ideal diode is an active circuit that emulates a forward-biased rectifier using a MOSFET and a control loop, achieving much lower forward voltage drop than a Schottky diode while also providing reverse-current blocking. Ideal diodes belong to the broader ORing controller / power-path protection category within power management ICs, and they are widely used in N+1 redundant supply architectures, battery backup systems, and USB Type-C power delivery paths where minimizing conduction loss and heat is critical. Key features of the LM73100RPWR include 28 mOhm Rds(on) (typ), 5.5 A continuous load current capability, an analog current monitor output (IMON) for accurate load-current sensing, input reverse-polarity protection, overvoltage lockout, inrush-current control with adjustable slew rate, and an operating junction temperature range of -40C to +125C. The HotRod QFN package provides low parasitic inductance and improved thermal performance versus conventional wire-bonded QFN packages of similar size. The architecture combines a charge-pump-driven N-channel pass FET with a fast ideal-diode control loop that responds to reverse current within microseconds. The current-monitor pin produces an analog current proportional to the load current, enabling closed-loop power budgeting, fault telemetry, and system health monitoring without a discrete sense resistor. Internal diagnostics include thermal warning, fault flag output, and load-fault timer. Typical applications include USB Type-C Power Delivery (PD) power-path switching in laptops and tablets, N+1 redundant power supply ORing, battery backup systems in industrial and telecom equipment, eFuse / hot-swap circuits in enterprise servers, and high-side load switching with reverse-polarity protection in factory automation modules. When designing with this part, place input and output bulk capacitors close to the VIN and VOUT pins to minimize ringing. Use the ILIM resistor to set the fast-trip threshold and the dVdt capacitor to control the inrush slew rate, both per the datasheet typical-application circuit. For 5 A continuous operation, provide at least 100 mm^2 of copper pour on the RPW thermal pad to keep the junction below 125C. This page synthesizes distributor pricing, drop-in alternatives in the same VQFN-HR-10 footprint, and practical layout and protection guidance drawn from the manufacturer datasheet - information not consolidated on a single distributor page.
LM74502DDFR - 65V RPP & Load Switch Controller | TI
The Texas Instruments LM74502DDFR is a low-IQ high-side switch controller with reverse polarity protection (RPP) and overvoltage protection, operating from a 3.2 V to 65 V supply input in an 8-pin TSOT-23-8 (DDF) surface-mount package. A reverse polarity protection controller governs external N-channel MOSFETs to block reversed or negative supply conditions while adding near-zero series resistance. Within the power-management hierarchy (RPP controller -> high-side controller -> power management IC), it replaces lossy series Schottky diodes, cutting conduction losses from hundreds of milliwatts to a few milliwatts. The back-to-back MOSFET arrangement also enables full load disconnect for safety-critical power paths. Key features include the wide 3.2 V to 65 V industrial operating range that covers 12 V, 24 V, and 48 V DC buses, low quiescent current for always-on systems, integrated overvoltage protection (OVP) with programmable threshold, and an ultra-small TSOT-23-8 footprint. The controller drives common-source N-FET pairs, giving designers freedom to scale current rating through MOSFET selection rather than changing the controller. Architecturally, the LM74502 uses an internal charge pump to enhance the external gate drivers above the source rail, keeping RDS(on) low during forward conduction and pulling the gate down quickly on reverse or overvoltage events. Precision comparators monitor input and output voltage to distinguish normal transients from fault conditions, asserting load disconnect only when required to minimize nuisance trips. Typical applications include 12 V and 24 V industrial power supplies, 48 V telecom and PoE front ends, automotive-adjacent industrial loads, and battery-input systems where reverse battery insertion must not destroy downstream circuitry. DigiKey classifies the device under OR Controllers/Ideal Diodes, reflecting its diode-replacement role. Design-wise, size the external FETs for both continuous current and the SOA during turn-off of a faulted supply, and keep gate-drive loops short. Verify that the OVP resistor divider tolerates the full transient rating of the bus. This page adds distributor pricing, drop-in alternative cross-references, and practical design notes synthesized beyond the TI datasheet.
LM74700-Q1 - 65V AEC-Q100 Ideal Diode Controller | TI
The Texas Instruments LM74700-Q1 is an automotive AEC-Q100 qualified ideal diode controller that operates with an external N-channel MOSFET as an ideal diode rectifier for low-loss reverse battery polarity protection, achieving a regulated forward voltage drop of only 20 mV in a 6-pin SOT-23 (DBV) package. An ideal diode controller is a power management IC that drives a MOSFET to emulate a diode with near-zero conduction loss. Instead of dissipating P = I x Vf watts in a Schottky diode (typically 0.4-0.7 V of forward drop), the controller servos the MOSFET gate to regulate the forward drop at roughly 20 mV, cutting conduction losses by more than an order of magnitude in battery-feed paths. Ideal diode controllers sit within the broader hierarchy of power-path protection ICs, alongside ORing controllers, hot-swap controllers, and reverse-polarity protection devices. Key features include a wide supply input range of 3.2 V to 65 V, an ultra-low operating quiescent current of 80 uA, and a shutdown current of approximately 1 uA when the enable pin is pulled low. The 65 V rating simplifies compliance with automotive ISO 7637 load-dump and transient requirements, while the 3.2 V floor supports severe cold-crank conditions in 12 V automotive battery systems. The controller integrates a charge pump that provides gate drive for the external N-channel MOSFET, allowing fast turn-on and low on-resistance operation. Internal regulation loop control holds the anode-to-cathode forward drop at 20 mV, emulating an ideal rectifier for ORing and reverse-battery blocking. Because the MOSFET conducts in either direction when enhanced, the controller must be placed appropriately for blocking topologies as described in the manufacturer datasheet. Typical applications include automotive reverse battery protection for ECUs and body electronics modules, N+1 redundant power supply ORing, industrial 24 V and 48 V rail protection, and cold-crank-tolerant front-end protection for infotainment and ADAS systems. A key design consideration: the enable pin allows the controller to be fully disabled, drawing roughly 1 uA, which is valuable in always-connected automotive systems where quiescent drain is tightly budgeted. This page synthesizes verified datasheet parameters, distributor listings, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
LM74910H-Q1 - 65V Automotive Ideal Diode Controller | TI
The Texas Instruments LM74910H-Q1 is an automotive ideal diode controller with integrated circuit breaker, undervoltage and overvoltage protection, and fault output, operating from a 3V to 65V input range in a 24-pin VQFN (4x4 mm) package. It drives external back-to-back N-channel MOSFETs in common-drain configuration and is AEC-Q100 qualified for -40C to +125C operation. An ideal diode controller is a power-management IC that replaces a physical diode in power path protection (PPP) and power ORing circuits. Instead of a silicon diode's fixed ~0.7V forward drop, the controller senses current direction and adjusts the gate of an external MOSFET to regulate the forward voltage to millivolts, dramatically reducing conduction loss and heat. Within the power management hierarchy, ideal diode controllers sit alongside hot-swap and eFuse controllers as front-end protection devices guarding automotive ECUs, industrial modules, and server power rails against reverse polarity, load dump, overcurrent, and faults. Key features of the LM74910H-Q1 include 74V absolute maximum rating, reverse input protection down to -65V, and 10.5mV anode-to-cathode forward voltage regulation for near-zero conduction loss. The low -10.5mV reverse detection threshold with fast 0.5us turn-off response blocks reverse current before it can flow. A 20mA peak DGATE drive enables fast MOSFET turn-on, and a 200-kHz analog current sense (ACS) output provides continuous current monitoring. An adjustable overcurrent threshold triggers the integrated circuit breaker, and a low-quiescent-current SLEEP mode conserves battery in always-connected modules. Technically, the LM74910H-Q1 uses a common-drain back-to-back MOSFET topology: one FET blocks reverse current in normal operation, while the pair isolates the load during faults or when input falls outside the programmed UV/OV window. The H-suffix variant offers extended protection headroom suited to 12V and 24V automotive battery rails exposed to ISO load-dump type transients. Fast comparator-based reverse detection minimizes body-diode conduction time, keeping power dissipation low during voltage transients between supplies. Typical applications include automotive reverse-battery and load-dump protection modules, N+1 redundant power ORing in ECUs and domain controllers, and front-end protection for infotainment, ADAS, and telematics units. The fault output simplifies diagnostics reporting to the vehicle host processor. Design consideration: keep the EN pin supply-conditioned rather than tied directly to a raw 12V battery rail if ISO 16750-2 transient immunity must be demonstrated - TI E2E discussions highlight this exact use case, and resistor conditioning with clamping preserves the device through reverse polarity tests. This page synthesizes distributor availability, drop-in alternatives within the LM749x0-Q1 and LM749xx-Q1 families, and practical design notes not consolidated in the manufacturer datasheet.
LM76005RNPR - 60V 5A Sync Step-Down Converter | Texas Instruments
The Texas Instruments LM76005RNPR is a 3.5-V to 60-V, 5-A synchronous step-down DC-DC converter housed in a 30-pin WQFN (RNP) package with exposed thermal pad. It integrates peak-current-mode control, dual MOSFET switches, and a seamless transition between PWM and PFM modes, delivering up to 5 A of continuous output current from input rails as high as 60 V (65 V tolerant for input surge events). A buck (step-down) converter is a switched-mode DC-DC topology that efficiently reduces a higher input voltage to a lower regulated output voltage by periodically storing and releasing energy through an LC filter. The LM76005RNPR belongs to the buck converter family within the broader switch-mode power supply (SMPS) hierarchy, which itself sits under DC-DC converters and the power management IC category. Synchronous variants replace the external Schottky rectifier with an integrated low-side MOSFET, improving efficiency and shrinking board area versus asynchronous designs. Key features include a wide 3.5 V to 60 V input range (with 65 V transient tolerance for automotive load-dump survival), 15 µA quiescent current in regulation, 95% efficiency at 400 kHz (12 V IN, 5 V OUT, 2 A), 92% PFM efficiency at 10 mA load, external clock synchronization, pin-selectable FPWM mode for low-EMI operation, and an adjustable soft-start of 6.3 ms default. Functional safety documentation is available for systems targeting ISO 26262 compliance. The device uses peak-current-mode control with internal compensation, minimizing external component count. Internal MOSFETs are optimized for low RDS(on) across the load spectrum, enabling high efficiency at both light and full loads. A precision reference provides ±1% output voltage accuracy, and seamless PWM-to-PFM transitions extend battery life in always-on applications by dropping quiescent losses. Typical applications include industrial 24 V rail conversion, automotive infotainment and ADAS power, factory automation PLC I/O, battery-powered e-mobility systems, point-of-load regulation downstream of a higher-voltage bus, and ruggedized field equipment. The wide input range makes it especially attractive for systems exposed to wide transients such as 24 V industrial busses and 12 V automotive rails. When designing with this part, ensure the input capacitor is sized to absorb the worst-case load-step ripple while keeping loop bandwidth stable. The exposed pad must be soldered to a continuous ground plane with thermal vias to handle up to 5 A continuous loads. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet alone, supporting engineers making sourcing and second-source decisions.
LM7805ACT - 5V 1A Fixed LDO Regulator, TO-220 | onsemi
The onsemi LM7805ACT is a monolithic fixed-output positive linear voltage regulator delivering a regulated 5.0 V at up to 1 A of output current, housed in a 3-pin TO-220-3 (TO-220AB) through-hole package with an industry-standard pinout of Input, Ground, and Output (left-to-right when viewed from the front with the tab up). It belongs to the LM78xx family of three-terminal regulators, offers ±2% output tolerance, and operates from a 10 V to 35 V input range with typical 2 V dropout, internal thermal shutdown, internal current limiting, and safe-area compensation that lets it deliver its full rated output when adequately heat-sunk. A linear regulator (LDO - Low-Dropout) is a type of voltage regulator that maintains a stable, low-ripple DC output even as the input voltage varies, by dissipating the excess voltage as heat across a pass element. Within the broader system hierarchy, the LM7805ACT sits in the linear-regulator branch of the power-management IC family, and is favored over switching regulators whenever the application values noise-free output, simplicity, low BOM cost, and fast transient response over efficiency. The 78xx series is the de-facto industry baseline for 5 V, 12 V, and 15 V analog rails. Key features include a 1 A continuous output rating (with peak inrush capability higher for short transients), ±2% output voltage tolerance (the "A" grade, versus ±4% on the non-A version), 2.0 V typical dropout at full load, internal short-circuit current limit, thermal-overload protection, and a TO-220 tab that doubles as the thermal pad. No external components are required beyond input and output bypass capacitors (typically 0.33 µF and 0.1 µF). The device uses a vertical NPN pass transistor architecture with a bandgap reference, Zener-based trimming, and on-chip safe-operating-area compensation. The architecture is intentionally simple - it has no enable pin, no soft-start, and no power-good flag - because the 7805 was designed as a "set-and-forget" rail for analog and digital subsystems where it can be left always-on behind a master switch. Its primary limitation is dropout (cannot produce 5 V from a 5 V rail) and efficiency (Pdiss = (VIN − 5 V) × IOUT, all of which becomes heat). Typical applications include 5 V digital logic supplies, microcontroller and sensor power, hobby/Arduino/Maker boards, USB device supplies, op-amp and ADC reference rails, replacement of legacy linear rails, and any application where a clean, low-noise, fixed 5 V rail is needed from a higher-voltage DC bus. Design consideration: at 1 A load the LM7805ACT dissipates approximately 7 W when dropping 12 V to 5 V, which demands a heatsink rated for at least 10 °C/W or larger copper area on the TO-220 tab. Always place input/output ceramic bypass capacitors close to the pins and respect the SOA of the internal pass transistor at high VIN. This page synthesizes live distributor pricing, parametric drop-in alternatives across onsemi, STMicroelectronics, Microchip, and TI, and practical thermal/layout design notes that go beyond what is in the manufacturer datasheet.
LM7805CT/NOPB - 5V 1.5A Linear Regulator TO-220 | Texas Instruments
The Texas Instruments LM7805CT/NOPB is a 1.5-A, 30-V linear voltage regulator with a fixed +5 V output in a 3-pin TO-220 (NDE) package. It is part of the industry-standard LM78xx family, employing internal current limiting, thermal shutdown, and safe-area compensation that make it essentially indestructible under normal overload conditions. This NOPB suffix variant is lead-free and RoHS compliant, qualifying it for modern manufacturing lines. What is a linear voltage regulator? A linear voltage regulator (also called an LDO when dropout voltage is low, or simply a three-terminal regulator in the LM78xx case) is a power management IC that maintains a constant DC output voltage from a higher, possibly variable DC input. Unlike a switching DC-DC converter, a linear regulator dissipates the difference between VIN and VOUT as heat, so efficiency equals VOUT/VIN. The taxonomy: three-terminal regulator -> linear regulator -> voltage regulator -> power management IC -> semiconductor. The LM78xx family is the most widely used fixed-output linear regulator series in history, with billions of units shipped across industrial, consumer, and hobby markets. Key features include 1.5 A peak output current, 5 V fixed output with typical +/-2% accuracy, 35 V maximum input voltage (per Mouser catalog listing), 2 V typical dropout, and internal thermal overload protection. The TO-220 package provides excellent thermal performance with a tab that can be soldered or screwed to a heatsink for continuous high-current operation. The LM7805CT/NOPB uses a bipolar Darlington pass element with bandgap reference and on-chip resistor dividers. Its safe-area compensation allows momentary output shorts without damage, and the thermal shutdown circuit typically trips around 170 C junction temperature. Quiescent current is typically 5 mA and rises only slightly with load. Typical applications include local 5 V regulation for digital logic (Arduino, microcontroller rails), USB charger / power-bank subsystems, hobby electronics, retrofit 5 V supplies in automotive 12 V systems, and as a quiet post-regulator after a switching converter to clean up ripple. When designing, always check worst-case dissipation (P = (VIN(max) - 5 V) x IOUT(max)) and select a heatsink accordingly. A heatsink is required whenever P exceeds about 1.5 W in free air at 25 C ambient. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet alone.
LM7805L-TA3-T - 5V 1A Fixed Positive LDO Regulator | UTC TO-220
The Unisonic Technologies LM7805L-TA3-T is a monolithic fixed positive voltage regulator delivering a fixed 5V output at up to 1A in a TO-220 through-hole package. It belongs to the UTC LM78XX family of 3-terminal regulators and provides the standard 7805 pinout (IN, GND, OUT) with a typical dropout voltage of 2V and a maximum input voltage rating of 35V. Output ripple rejection is specified at 80 dB at 120 Hz and output noise is 40 uV typical across the audio band, making the LM7805L-TA3-T well-suited for powering analog circuitry on a 5V rail. What is a linear voltage regulator? A linear voltage regulator is a power management integrated circuit that maintains a constant output voltage by varying its internal pass-element resistance. Within the broader taxonomy, the LM7805L-TA3-T is a fixed-output LDO/standard linear regulator -> linear regulator -> voltage regulator -> power management IC -> semiconductor. Compared to switching regulators, linear regulators add no switching noise to the output rail and require minimal external components, at the cost of lower efficiency when VIN-VOUT is large. Key features include built-in over-current protection (OCP) and over-temperature protection (OTP), fixed 5V ±4% output tolerance, an operating junction temperature range of -20C to +125C, and a quiescent current of approximately 8 mA. The bipolar pass transistor architecture provides robust short-circuit immunity and predictable thermal behavior under sustained load. Technically, the LM7805L-TA3-T uses a bandgap reference and error amplifier to drive an NPN Darlington pass element, with the dropout determined by the Vce(sat) of the Darlington plus base-drive headroom. The 80 dB PSRR at 120 Hz is more than sufficient to reject the dominant ripple component from a 50/60 Hz transformer-rectifier input stage. Typical applications include 5V logic supply rails for microcontrollers and TTL/CMOS logic, USB device power from a 12V or 24V bus, hobbyist and educational electronics, and as a post-regulator following a switching converter to clean up residual switching noise. When designing with this part, calculate worst-case power dissipation PD = (VIN - 5V) × IOUT and verify junction temperature using θJA = 100 °C/W (free-air) or with an attached heatsink; at 12V/1A the regulator must dissipate 7W and requires a heatsink. This page consolidates distributor pricing for the LM7805L-TA3-T, qualified drop-in 5V/1A TO-220 alternatives, and practical PCB layout notes beyond what the manufacturer datasheet alone provides.
LM7805MPX/NOPB - 1.5A, 30V Fixed 5V Linear Regulator | Texas Instruments
The Texas Instruments LM7805MPX/NOPB is a fixed-output positive linear regulator that delivers a stable 5.0 V at up to 1.5 A, packaged in a 4-pin SOT-223 (DCY) surface-mount format. It accepts input voltages from approximately 7 V to a maximum of 30 V and provides 1.5 A continuous output current, with internal thermal overload and short-circuit protection built into the silicon. A linear regulator is a type of voltage regulator that maintains a constant DC output voltage by dissipating excess input-to-output voltage as heat. Within the power management IC hierarchy, the LM7805 belongs to the linear regulator family, sitting above switching regulators in simplicity (no inductor needed) but below LDO regulators in dropout performance. This trade-off is why 7805-series regulators remain popular as simple, rugged 5 V rails. Key features include a fixed 5 V output (no external feedback resistors required), 1.5 A continuous output current, internal thermal shutdown and output short-circuit protection, and a wide 7 V to 30 V input operating range. The SOT-223 package offers a tab that doubles as a thermal pad, allowing direct soldering to PCB copper for heatsinking. Architecturally, the LM7805 uses a classic bipolar pass-transistor topology with a bandgap-derived reference. Unlike an LDO, it requires at least 2 V of input-to-output headroom to maintain regulation, which means it dissipates significant power at high VIN. The output impedance is low and line/load regulation are tight, giving clean DC for digital and analog loads. Typical applications include microcontroller 5 V rails, sensor signal protection, hobby electronics, and any 5 V supply where simplicity, robustness, and low cost outweigh efficiency. A practical design consideration is thermal dissipation. At VIN = 12 V and 1 A load, the part dissipates 7 W, so the SOT-223 tab MUST be soldered to a sufficient copper area (typically >=1 square inch) to keep Tj within safe limits. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LM7812CT - 12V 1A Positive Fixed LDO Regulator TO-220 | onsemi
The onsemi LM7812CT is a 12V positive fixed-output linear voltage regulator (LDO) delivering up to 1A of load current in a 3-pin TO-220 through-hole package. It accepts input voltages up to 35V (typical operating range 14.5V to 27V), provides a regulated 12V output with ±4% tolerance, and includes internal thermal overload protection, safe-area (SOA) current limiting, and output transistor safe-area compensation. What is a linear voltage regulator? A linear voltage regulator is a semiconductor device that maintains a constant DC output voltage by dissipating the difference between input and output as heat. The LDO (Low Dropout) variant can regulate with very small VIN-VOUT headroom. The LM7812 belongs to the 78xx positive fixed regulator family — a class of regulators characterized by three pins (Input, Ground, Output), fixed output voltages in the 78xx series (5V, 6V, 8V, 9V, 12V, 15V, 18V, 24V), and integrated protection. This family sits within the broader hierarchy of linear regulators → voltage regulators → power management ICs. Key features include 1A continuous output, internal thermal shutdown, and a typical output impedance of 0.01 Ω at 1 kHz. The device requires no external components beyond input and output bypass capacitors, simplifying PCB layout for legacy through-hole designs. Ripple rejection is typically 55 to 72 dB depending on output voltage and capacitor selection. The LM7812CT uses a bipolar pass-transistor architecture with a bandgap-derived voltage reference and on-chip error amplifier. Thermal performance is governed by TO-220 package thermal resistance (~50 °C/W junction-to-ambient free-air, or ~5 °C/W with a proper heatsink). The device is specified for 0 °C to +125 °C junction temperature operation. Typical applications include ATX peripheral power rails, hobby electronics, industrial 24V-to-12V step-down rails, motor driver auxiliary supplies, and replacement boards for legacy linear designs. The TO-220 package accepts hand-soldering and standardized heatsink mounting. When designing with this device, observe proper heatsinking for dissipation above 2W. Place input and output capacitors close to the pins to suppress oscillation and improve transient response. For higher-current or switching applications, consider an LM2596 or LM78S12 instead.
LM7812L-TA3-T - 12V 1A Fixed LDO Regulator, TO-220 | UTC
The Unisonic Technologies LM7812L-TA3-T is a monolithic fixed-voltage positive linear regulator delivering a nominal 12V output at up to 1A of load current, housed in a 3-pin TO-220 through-hole package (TA3-T suffix denoting the TO-220 lead-formed tape-and-ammo packing option). It accepts input voltages between 14.5V and 35V and provides internal thermal shutdown and over-current protection, making it suitable for cost-sensitive industrial, consumer, and hobby applications where a clean, stable 12V rail is required. A linear regulator - and the 78xx family specifically - is a type of power-management IC that drops a higher DC input voltage down to a fixed, regulated lower DC output voltage using a pass transistor and on-chip bandgap reference. In the broader system hierarchy, the LM7812 sits below switching converters in efficiency but excels in simplicity, low noise, and zero EMI, which is why it remains a default choice for analog rails, op-amp supplies, relay coils, fan drivers, and microcontroller peripheral power. Key specifications include a typical output voltage of 12V (regulated to within approximately +/-4% across line, load, and temperature), 1A continuous output current, a quiescent current of 8 mA, ripple rejection of 72 dB at 120 Hz, and an output noise floor of approximately 75 uV. The TO-220 package provides a tab that can be soldered or clipped to a PCB copper pour or external heatsink, supporting reliable operation at the upper end of the input-voltage and load-current range. The regulator uses a series NPN pass element with on-chip bandgap reference and error amplifier, providing closed-loop regulation without external feedback components. Its 72 dB ripple rejection at 120 Hz effectively attenuates rectified mains hum and downstream switching noise from upstream converters. Typical applications include 12V power rails for op-amps, relays, fans, LED drivers, motor drivers, microcontroller peripherals, and hobby robotics. The wide input range also supports industrial 24V systems with adequate headroom and 12V battery-powered equipment such as lead-acid battery stacks. When designing with this device, calculate power dissipation as (VIN - VOUT) x IOUT and ensure the TO-220 tab is heatsinked when dissipation exceeds approximately 1.5W. A minimum 0.33 uF input capacitor and 0.1 uF output capacitor are recommended for stability, per the UTC datasheet. This page synthesizes distributor pricing, drop-in alternatives across multiple manufacturers, and practical design notes not found in the standalone manufacturer datasheet, enabling engineers to source and qualify the LM7812L-TA3-T with confidence.
LMD18200T/NOPB - 3A 55V H-Bridge Motor Driver | Texas Instruments
The Texas Instruments LMD18200T/NOPB is a 3A continuous (6A peak) H-bridge motor driver IC designed for motion control applications, housed in an 11-pin TO-220 power package. Key headline specifications are 3A continuous output current, 55V absolute maximum supply voltage, and integrated DMOS power devices on a multi-technology Bi-CMOS/DMOS monolithic structure. An H-bridge motor driver is a four-switch power stage that allows a DC motor or stepper winding to be driven in both directions from a single supply rail. The H-bridge sits within the broader hierarchy of motor driver ICs -> motion controllers -> power management ICs -> semiconductor ICs, and is a foundational building block for brushed DC and bipolar stepper motion systems. By integrating both the high-side and low-side switches, plus direction and PWM control logic, an H-bridge IC eliminates the discrete MOSFET design effort for sub-50V applications. Key features of the LMD18200T/NOPB include continuous 3A output current with 6A peak capability, a wide 12V to 55V supply range, built-in shoot-through protection, thermal shutdown, and a low-loss current-sense output that eliminates the need for a discrete sense resistor. The Bi-CMOS/DMOS process combines bipolar/CMOS logic with DMOS power transistors on a single die, achieving typical R_DS(on) values in the sub-0.3-ohm per switch region. The TO-220-11 package provides a thermally efficient through-hole footprint with formed leads optimized for vertical mount with an external heatsink. The device accepts TTL/CMOS-compatible DIRECTION and PWM inputs and integrates anti-shoot-through dead-time control, so external microcontroller logic is sufficient for full bidirectional speed and position control. Internal charge-pump-driven high-side switches allow 100% duty-cycle operation - critical for accurate low-speed DC motor control where PWM-frequency ripple cannot be tolerated on the output stage. Typical applications include brushed DC servo motor drives, bipolar stepper motor amplifiers (one LMD18200 per winding), robotic actuator drivers, valve and solenoid controllers, and industrial automation motion subsystems. The device is well suited to industrial 24V and 36V bus systems where its 55V rating provides sufficient transient margin. When designing with the LMD18200T/NOPB, plan for an external heatsink sized for continuous worst-case dissipation: at 3A and a 24V supply, internal conduction losses alone can exceed 4W. Place a 1uF or larger bulk decoupling capacitor close to the supply pins and add a 0.1uF ceramic high-frequency bypass to suppress the charge-pump switching noise that otherwise couples back to the motor terminals. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the LMD18200T/NOPB that are not present in the manufacturer datasheet alone, and that are tailored to help engineers select, source, and qualify the part quickly.
LMG2104R022 - 100V 2.2mΩ GaN Half-Bridge Power Stage | TI
The Texas Instruments LMG2104R022 is a 100 V, 2.2 mΩ half-bridge GaN power stage with an integrated gate driver and built-in protection, supplied in a 4.5 mm × 7.0 mm QFN-18 (VBNR) package. It combines two enhancement-mode gallium nitride (GaN) FETs and a smart gate-driver IC into one compact module, delivering the low-loss switching, high slew-rate control, and protection features expected of a modern GaN integration. A GaN half-bridge power stage is an integrated circuit (IC) that contains the two power transistors (high-side and low-side) plus their driver circuitry in a single package. GaN FETs offer lower switching losses, lower gate charge, and zero reverse-recovery charge compared with silicon MOSFETs, making the device category - the GaN power stage - especially attractive for high-frequency, high-density DC-DC converters, Class-D audio amplifiers, and motor drives. Key features of the LMG2104R022 include a 2.2 mΩ typical on-resistance, 100 V drain-to-source rating, integrated bootstrap diode, under-voltage lockout (UVLO), over-current protection, and overtemperature protection. The smart switching features reduce EMI through controlled dV/dt and minimize dead time, which raises efficiency and shrinks the magnetics bill of materials in switched-mode power supply (SMPS) designs. Architecturally, the half-bridge topology is implemented with a high-side GaN FET and a low-side GaN FET, both e-mode (normally-off) devices. The silicon gate driver accepts low-voltage CMOS inputs and generates the rail-to-rail gate signals required to fully enhance the GaN transistors. Integrated dead-time control prevents shoot-through, while the on-package exposed pad provides a low thermal-resistance path to PCB copper. Typical applications include 48 V telecom and server point-of-load (POL) converters, industrial buck and buck-boost converters, Class-D audio amplifiers, BLDC motor drives, and USB-PD power adapters. The 100 V rating tolerates wide-input telecom rails as well as 24 V industrial buses. When designing with this part, ensure that the bootstrap capacitor and high-side bypass capacitor follow the manufacturer layout guidance in the datasheet. Keep the switching-node loop area minimal to avoid parasitic ringing - the integrated driver is designed to suppress most of it, but PCB layout discipline is still essential. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LMG2104R044 - 100V 4.4mΩ GaN Half-Bridge Power Stage | TI
The Texas Instruments LMG2104R044 is a 100 V, 4.4 mΩ half-bridge GaN power stage with an integrated gate driver, integrated bootstrap, and enhanced protection features, supplied in a 5 mm x 4 mm QFN package. It combines two enhancement-mode GaN FETs (high-side and low-side) with the driver circuitry needed to switch them cleanly at high frequency, providing up to 100 V drain-to-source blocking and a typical on-resistance of 4.4 mΩ per FET at room temperature. A GaN (Gallium Nitride) half-bridge power stage is a fully integrated switching building block that places two GaN transistors and their gate drive on one substrate. Compared to discrete Si MOSFET half-bridges, GaN devices offer much lower switching loss, lower gate charge, and zero reverse-recovery charge, allowing converters to switch at 1 MHz and above. The half-bridge power stage sits in the broader power electronics hierarchy as: GaN FET -> GaN half-bridge -> power stage -> DC-DC converter / motor driver / class-D amplifier. The LMG2104R044 also integrates protection and a proprietary bootstrap regulator, simplifying the high-side gate-drive design that normally requires an external bootstrap diode and bias supply. Key specifications include 100 V drain-source blocking voltage, 4.4 mΩ typical Rds(on), integrated half-bridge topology, TTL-compatible 3.3 V / 5 V logic inputs, integrated bootstrap voltage regulator, and smart switching features. Smart-switching technology auto-tunes dead-time to minimize body-diode conduction and prevents simultaneous turn-on of both FETs, increasing efficiency and reducing EMI. The device operates from a single supply and supports high-side and low-side PWM inputs with internal level shifting. The LMG2104R044 uses TI's enhancement-mode GaN-on-Si process and integrates the gate driver close to the die to minimize parasitic loop inductance. A proprietary bootstrap voltage control regulates the high-side gate within the safe operating range regardless of VCC level. Internal protection features include undervoltage lockout on both VCC and the bootstrap rail, thermal shutdown, and short-circuit / overcurrent protection that de-glitches the gate driver when excessive current is detected. Typical applications include 48 V to point-of-load DC-DC converters, class-D audio amplifiers, motor drives, telecom brick converters, and high-density synchronous rectification. The integrated driver and protection features significantly reduce PCB area versus equivalent discrete half-bridge implementations. When designing with the LMG2104R044, place input ceramic bypass capacitors as close as possible to the power and signal pins to minimize high-frequency loop inductance. The exposed pad must be soldered to a sufficiently large copper pour for thermal relief - GaN power stages can switch at MHz frequencies and dissipate meaningful conduction loss at high currents. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
LMG2652H - 650V 140mΩ GaN Half-Bridge With Integrated Driver | TI
The Texas Instruments LMG2652H is a 650V 140mΩ GaN power-FET half bridge with integrated gate drivers, bootstrap FET, and high-side gate-drive level shifter in a 6mm x 8mm QFN package. It delivers integrated current-sense emulation, low-side and high-side gate drive, and a smart-switched GaN bootstrap FET with no diode forward-voltage drop and zero reverse-recovery charge. The device targets switch-mode power supplies up to 650V with simplified PCB layout. A GaN (Gallium Nitride) half-bridge power stage is a type of integrated power semiconductor that combines two enhancement-mode GaN FETs in a half-bridge configuration with all necessary drive, level-shifting, and bootstrap support. Within the broader hierarchy of power electronics, GaN half-bridges sit between discrete GaN FETs + external driver ICs and fully integrated digital point-of-load (POL) modules, offering a compact and high-efficiency building block for high-voltage converters. Key features include a 650V drain-to-source rating, 140mΩ on-resistance per FET, support for converter light-load efficiency and burst-mode operation with low quiescent current, and fast start-up times. The integrated current-sense emulation eliminates the need for an external current-sense resistor or current transformer on the low side, reducing BOM count and power loss. The smart bootstrap switch avoids overcharging of the high-side supply during transients and removes the conventional bootstrap diode forward drop. The LMG2652H combines 650V GaN technology with TI's integrated driver IP to achieve faster switching edges, lower switching losses, and smaller magnetics compared with silicon MOSFET half bridges. The architecture is designed for hard-switched and soft-switched topologies including active-clamp flyback, totem-pole PFC, and high-frequency isolated DC-DC converters. The 6mm x 8mm QFN package has an exposed thermal pad enabling direct PCB cooling without an external heatsink at moderate power levels. Typical applications include switch-mode power supplies, USB-PD and laptop adapters, telecom and server AC-DC front ends, telecom DC-DC converters, and Class-D audio amplifiers. The 650V rating and high switching frequency capability make this device especially attractive for totem-pole PFC and active-clamp flyback designs where synchronous rectification and high efficiency are required. When designing with the LMG2652H, ensure the PCB layout minimizes high-side gate-drive loop inductance and places the bootstrap capacitor close to the BST pin. Confirm that peak switching node dV/dt stays within the device rating during dead-time transitions, and observe the recommended UVLO and start-up sequencing from the LMG2652H datasheet to avoid unwanted half-bridge shoot-through. This page synthesizes distributor pricing, drop-in alternatives, and practical design guidance distilled from the TI datasheet and third-party reference designs - information not available on a single distributor product page.