TLE42744GV50ATMA1 - 400mA 5V LDO Regulator | Infineon
MPN： TLE42744GV50ATMA1 ✓ 啟用中TLE42744GV50ATMA1 概覽
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.
直接替換替代品，適用於 TLE42744GV50ATMA1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TLE42744GV50ATMA1 （相同外形與佔位） — 差異在於 Package, Protection Features, Input Voltage Range, Output Voltage Accuracy, Output Type.
TLE42744GSV33HTMA1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TLE42744EV50XUMA1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TLE42744DV50ATMA1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TLS850F0TAV50ATMA1
✅ 直接替換📋 參考替代品（不在目錄中）
NCV4275ADS50R4G
✅ 直接替換📋 參考替代品（不在目錄中）
L78S05CDT-TR
✅ 直接替換📋 參考替代品（不在目錄中）
TLE42744GV50ATMA1 最大額定值與電氣特性
| Product Type | LDO Linear Voltage Regulator |
| 輸出類型 | Fixed 5.0 V |
| Output Voltage Nominal | 5.0 V (±2%) |
| 最大輸出電流 | 400 mA |
| 輸入電壓範圍 | 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 |
| 封裝 | PG-TO263-3-1 (TO-263-3 with tab) |
| 安裝類型 | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| RoHS 狀態 | Compliant |
TLE42744GV50ATMA1 腳位配置
| 腳位 1 | VIN — Input voltage supply (up to 40 V) |
| 腳位 2 | GND — Ground reference |
| 腳位 3 | VOUT — Regulated 5.0 V output |
| 腳位 Tab | TAB (GND) — Metal tab thermally connected to GND for heatsinking |
典型應用
TLE42744GV50ATMA1 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 TLE42744GV50ATMA1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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) |
主要差異化特點
- 40 V input voltage rating covers 24 V truck systems (對比L78S05CDT-TR (ST))
- Integrated reverse-polarity protection on the IC (對比L78S05CDT-TR (ST))
- Wide 12 V/24 V dual-bus support from single part (對比TLS850F0TAV50ATMA1 (Infineon))
設計說明
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.
合規資訊
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.
