TLE42744GV50ATMA1 - 400mA 5V LDO Regulator | Infineon
MPN: TLE42744GV50ATMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.32 | $1.32 |
| 10 | $1.21 | $12.10 |
| 100 | $1.05 | $105.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.81 | $810.00 |
| 2,500 | $0.72 | $1,800.00 |
TLE42744GV50ATMA1 Overview
An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only marginally above the desired output, eliminating the switching noise of a buck converter at the cost of lower efficiency. LDOs sit within the broader hierarchy of linear regulators, which themselves belong to the power management IC family. They are the standard building block for post-regulation after switching pre-regulators and for direct regulation of low-current rails from battery or bus sources.
Key features of the TLE42744GV50ATMA1 include 60 dB PSRR at 100 Hz for ripple rejection, a low quiescent current of 220 µA, a typical maximum supply current of 30 mA, and an output current capability of 400 mA. The PG-TO263-3-1 package uses the metal tab as a thermal pad and provides the low thermal resistance required for sustained 400 mA operation in a small PCB footprint. The AEC-Q100 automotive qualification and integrated protection features make it suitable for safety-relevant applications.
Architecturally, the device uses a monolithic bipolar process with an integrated pass transistor, bandgap reference, and error amplifier, regulated to a fixed 5 V without external feedback components. This integration simplifies BOM, reduces PCB area, and improves reliability versus discrete regulator designs. The high 40 V input rating gives generous headroom on 12 V and 24 V buses with load-dump transients.
Typical applications include automotive body and chassis ECUs, sensor and actuator supplies, industrial PLC I/O rails, and battery-powered systems that need a clean 5 V rail from a wide input range. It is commonly used as a post-regulator after a switching pre-converter to clean switching noise on analog or MCU supply pins.
When designing with the TLE42744GV50ATMA1, place input and output capacitors close to the IC and observe the maximum power dissipation set by the TO-263 thermal pad. Always follow automotive load-dump and reverse-battery protection practices when using this part in 12 V or 24 V vehicles.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, supporting engineers in component selection, second-sourcing, and PCB layout decisions.
Drop-in alternatives for TLE42744GV50ATMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLE42744GV50ATMA1 (same form factor and footprint) — differing in Package, Protection Features, Input Voltage Range, Output Voltage Accuracy, Output Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
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View Datasheet →TLE42744DV50ATMA1
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View Datasheet →TLS850F0TAV50ATMA1
✅ Drop-In📋 Reference alternative (not in catalog)
NCV4275ADS50R4G
✅ Drop-In📋 Reference alternative (not in catalog)
L78S05CDT-TR
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TLE42744GV50ATMA1 Maximum Ratings & Electrical Characteristics
| Product Type | LDO Linear Voltage Regulator |
| Output Type | Fixed 5.0 V |
| Output Voltage Nominal | 5.0 V (±2%) |
| Maximum Output Current | 400 mA |
| Input Voltage Range | up to 40 V |
| Quiescent Current (Iq) | 220 µA |
| Maximum Supply Current | 30 mA |
| PSRR | 60 dB at 100 Hz |
| Protection Features | Over Current, Over Temperature, Reverse Polarity, Short Circuit |
| Package | PG-TO263-3-1 (TO-263-3 with tab) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| RoHS Status | Compliant |
TLE42744GV50ATMA1 Pin Configuration
| Pin 1 | VIN — Input voltage supply (up to 40 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | VOUT — Regulated 5.0 V output |
| Pin Tab | TAB (GND) — Metal tab thermally connected to GND for heatsinking |
Typical Applications
TLE42744GV50ATMA1 is suitable for 6 applications: Automotive Body & Chassis ECU Power, Industrial PLC I/O & Sensor Supply, Battery Management & Always-On Systems, Post-Regulation for Noise-Sensitive Analog, HVAC & Climate Control Modules, LED Driver Logic Supply.
Automotive Body & Chassis ECU Power
The TLE42744GV50ATMA1 delivers a clean, fixed 5 V rail at up to 400 mA from 12 V or 24 V automotive bus voltages with input tolerance up to 40 V for load-dump transients. Its AEC-Q100 qualification, integrated reverse-polarity protection, and 60 dB PSRR at 100 Hz make it a direct fit for BCMs, lighting controllers, and door/seat modules where predictable 5 V supplies for microcontrollers and CAN transceivers are required. The PG-TO263-3-1 tab provides the thermal headroom needed for sustained 400 mA in sealed under-dash enclosures.
Recommended
Industrial PLC I/O & Sensor Supply
The TLE42744GV50ATMA1's 40 V input and ±2% output accuracy let industrial designers feed 24 V nominal rails directly to 5 V sensor and I/O logic without pre-regulation. Its 220 µA quiescent current supports always-on PLC inputs and 4-20 mA loop interfaces, while over-current and over-temperature protection reduce field-failure risk. The TO-263-3 tab dissipates the (24 V-5 V)×IOUT heat efficiently, simplifying thermal layout in DIN-rail mounted controllers where PCB copper area is limited.
Recommended
Battery Management & Always-On Systems
The TLE42744GV50ATMA1's 220 µA quiescent current and 40 V input tolerance suit battery-powered and always-on automotive systems such as immobilizers, remote keyless entry, and e-call modules. Reverse-polarity protection guards against service-jump miswiring, while the 5 V fixed output eliminates external feedback components. Designers can source current directly from 12 V battery rails through cold-crank and load-dump events, keeping MCU and supervisory circuits alive during deep cranking dips.
Recommended
Post-Regulation for Noise-Sensitive Analog
Placed after a switching pre-regulator, the TLE42744GV50ATMA1 cleans residual switching ripple from analog and RF supply pins with 60 dB PSRR at 100 Hz. Unlike a switching regulator, the linear pass element adds no EMI and is well suited to sensor signal-chain AVDD, ADC reference buffers, and instrumentation op-amp rails where clean power directly impacts measurement accuracy. The fixed 5 V output simplifies power-tree design in mixed-signal industrial and automotive data-acquisition systems.
Recommended
HVAC & Climate Control Modules
Automotive HVAC and climate control modules require robust 5 V supplies for microcontroller, sensor, and BLDC driver logic on 12 V vehicle buses. The TLE42744GV50ATMA1's 40 V input rating handles jump-start events, and its integrated thermal shutdown protects the regulator in fan-motor inrush conditions. The TO-263-3 package provides the thermal dissipation needed for sustained 400 mA loads in enclosed blower and evaporator housings.
Recommended
LED Driver Logic Supply
LED driver modules for automotive exterior lighting and industrial signage need stable 5 V logic rails to feed MCU, communication, and diagnostic circuits. The TLE42744GV50ATMA1 supplies these rails from a wide 5-40 V input, tolerating large VIN swings from boost-converter upstream stages. Reverse-polarity and short-circuit protection safeguard the regulator in the field-service environment of automotive exterior lamps.
Recommended
Recommended Products Summary
Engineering reference data for TLE42744GV50ATMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE42744GSV33 | TLE42744EV50 | TLS850F0TAV50ATMA1 | NCV4275ADS50R4G | L78S05CDT-TR |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | onsemi | STMicroelectronics |
| Package | PG-TO263-3-1 (TO-263-3 with tab) | PG-TO263-3-1 | PG-TO263-3-1 | PG-TO263-3-1 | PG-TO263-3-1 (D2PAK) | PG-TO263-3 (DPAK-compatible) |
| Output Voltage | 5.0 V | 3.3 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| Output Current | 400 mA | 400 mA | 400 mA | 450 mA | 450 mA | 2 A |
| Input Voltage Max | 40 V | 40 V | 40 V | 40 V | 40 V | 35 V |
| Automotive Grade (AEC-Q100) | Yes | Yes | Yes | Yes | Yes | Industrial grade (NCV version AEC-Q100) |
| Reverse-Polarity Protection | Yes | Yes | Yes | Yes | Yes | No (requires external) |
Key Differentiators
- 40 V input voltage rating covers 24 V truck systems (vs L78S05CDT-TR (ST))
- Integrated reverse-polarity protection on the IC (vs L78S05CDT-TR (ST))
- Wide 12 V/24 V dual-bus support from single part (vs TLS850F0TAV50ATMA1 (Infineon))
Design Notes
Estimated: at VIN=24 V, VOUT=5 V, and full 400 mA load, power dissipation is (24-5)×0.4 = 7.6 W. The PG-TO263-3-1 tab typically has theta_JA around 31-40 C/W on 1 sq-in 2-oz copper, resulting in a 235-300 C junction temperature rise above ambient. Substantial copper pour plus thermal vias under the tab are mandatory for reliable operation above 2-3 W dissipation in sealed enclosures.
Place input and output ceramic capacitors as close as possible to the IC pins to minimize parasitic inductance. Use a 1 µF X7R minimum on the input (40 V rated) and a 1 µF X7R minimum on the output (10 V rated). The TO-263-3 tab must be soldered to a copper pour with thermal vias to dissipate power; an unsoldered tab causes thermal runaway within seconds at full load.
The reverse-polarity protection is implemented by internal circuitry and does NOT protect the load downstream; always follow Infineon application notes for reverse-battery protection of downstream components. Do not exceed 40 V input - load-dump pulses on 24 V trucks can reach 36 V steady-state with peaks above 40 V that will damage the IC. Add a TVS diode or upstream clamping for trucks.
Keep the input capacitor ground return and the output capacitor ground return on a single, unbroken ground plane directly under the IC. Long ground traces between input and output capacitors create a high-frequency loop that reduces PSRR above 100 kHz. Use star-ground routing from the tab to the input and output capacitor returns to maintain ripple rejection.
Compliance Information
AEC-Q100 qualified per Infineon OPTIREG family datasheet. RoHS and REACH compliant per Infineon product page. Lead-free and halogen-free per package materials declaration.
