TLE42744DV50ATMA1 - 5V 400mA Automotive LDO Regulator | Infineon
MPN： TLE42744DV50ATMA1 ✓ 啟用中TLE42744DV50ATMA1 概覽
An LDO (Low-Dropout) linear regulator is a member of the linear regulator family inside the broader category of power management ICs (PMICs). Unlike switching regulators, an LDO uses a pass transistor in linear mode to drop excess input voltage, which produces an ultra-clean output at the cost of dissipating the input-to-output voltage difference as heat. This architecture makes LDOs the preferred choice when low noise, simplicity, and fast transient response matter more than conversion efficiency, especially in analog, sensor, and MCU supply rails.
Key features of the TLE42744D V50 include 400 mA continuous output current, 250 mV typical dropout at rated load, integrated protection functions (overvoltage, overtemperature, reverse polarity, short-circuit), and automotive-grade qualification per AEC-Q100. The output tolerance is ±2% over the full operating range, and the device is optimized for cranking-during-start conditions typical of automotive 12 V powernet systems. The PG-TO252-3 (DPAK) package has a metal tab that doubles as the output pin and the primary thermal path, allowing the part to dissipate meaningful power when properly soldered to a sufficiently large copper pour.
Technically, the regulator uses a PNP-Darlington-style pass element controlled by a bandgap-trimmed reference and an error amplifier. Current limiting, thermal shutdown, and a reverse-battery protection scheme are integrated, reducing external component count. The PG-TO252-3 (DPAK) footprint is one of the most widely adopted automotive LDO footprints and enables direct PCB-level interchangeability with several competing 400 mA 5 V LDOs.
Typical applications include automotive body and chassis ECUs, sensor and actuator supplies, instrument-cluster microcontrollers, infotainment head units, and any 12 V/24 V industrial bus that requires a clean 5 V rail. The wide input range also covers load-dump transients above 40 V with appropriate external protection.
When designing with this part, place the input capacitor close to the IC, ensure the DPAK tab has at least 1 cm^2 of copper, and verify worst-case dissipation during cold-crank (Vbat as low as ~5.5 V) where dropout can be marginal.
This page synthesizes distributor pricing from nine sources, real-world drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.
直接替換替代品，適用於 TLE42744DV50ATMA1 — 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： TLE42744DV50ATMA1 （相同外形與佔位） — 差異在於 Package, Protection Features, Input Voltage Range, Output Voltage Accuracy, Dropout Voltage.
TLE42744DV33ATMA1
✅ 直接替換聯絡詢價
查看資料表 →TLE42702DATMA1
✅ 直接替換聯絡詢價
查看資料表 →IFX25001TFV50ATMA1
✅ 直接替換📋 參考替代品（不在目錄中）
TLE4274DV50ATMA1
✅ 直接替換📋 參考替代品（不在目錄中）
TLS715B0EJV50XUMA1
✅ 直接替換聯絡詢價
查看資料表 →TLE42744DV50ATMA1 最大額定值與電氣特性
| 輸出類型 | Fixed |
| 輸出電壓 | 5 V |
| Output Voltage Accuracy | +/-2% |
| 最大輸出電流 | 400 mA |
| 輸入電壓範圍 | 5.5 V to 40 V |
| 壓降電壓 | 250 mV (typical at 400 mA) |
| 工作溫度範圍 | -40C to +150C (junction) |
| 封裝 | PG-TO252-3 (DPAK, 2 Leads + Tab, SC-63) |
| 安裝類型 | Surface Mount |
| 腳位數 | 3 |
| Protection Features | Short-circuit, overtemperature, overvoltage, reverse polarity |
| AEC-Q100 Qualification | Qualified |
| RoHS 狀態 | Compliant |
| Product Series | OPTIREG |
| 拓撲 | LDO (linear, fixed output) |
TLE42744DV50ATMA1 腳位配置
| 腳位 1 | IN — Input voltage (5.5 V to 40 V) |
| 腳位 2 | GND — Ground reference |
| 腳位 3 | OUT — Regulated 5 V output (also the metal tab for thermal dissipation) |
典型應用
TLE42744DV50ATMA1 適用於 6 應用s: Automotive Body Control Module (BCM) Supply, Instrument Cluster Microcontroller Power, Industrial 24V PLC Sensor Supply, Sensor and Actuator ECU Supply, Infotainment Head Unit Auxiliary Rail, Battery Management System Peripheral Supply.
Automotive Body Control Module (BCM) Supply
The TLE42744DV50ATMA1's 5.5 V to 40 V input range and AEC-Q100 qualification make it ideal for automotive body control modules that derive 5 V from a 12 V powernet. With 400 mA continuous load capability and 250 mV dropout, it reliably powers BCM microcontrollers, relay drivers, and LIN/CAN transceivers even during cold-crank dips to ~6 V. The integrated reverse-polarity and overvoltage protection eliminates the need for external TVS diodes at the input, reducing BOM cost and PCB area in space-constrained BCM housings. Per the Infineon OPTIREG datasheet, the part is specifically characterized for cranking profiles per ISO 7637 and ISO 16750, ensuring clean 5 V rails for sensitive digital logic throughout the entire automotive voltage transient envelope.
推薦
Instrument Cluster Microcontroller Power
Instrument cluster MCUs require a stable, low-noise 5 V rail for display drivers, stepper motor controllers, and CAN-FD transceivers. The TLE42744DV50ATMA1's fixed 5 V +/-2% output and linear topology provide ultra-clean DC with no switching noise, which is critical for analog gauge stepper-motor precision and avoids EMI interference with the cluster's display backlight PWM. The PG-TO252-3 (DPAK) package allows direct PCB mounting behind the cluster housing where ambient temperature reaches +85C; the device's 150C junction rating provides adequate thermal margin. Automotive OEM qualification per AEC-Q100 simplifies PPAP documentation for tier-1 cluster suppliers.
推薦
Industrial 24V PLC Sensor Supply
Industrial 24 V PLC systems often require a local 5 V rail to power analog sensor front-ends, ADC references, and isolated signal-conditioning circuitry. The TLE42744DV50ATMA1's 40 V maximum input comfortably covers 24 V nominal plus IEC 61131-2 transient margin, while its AEC-Q100 ruggedness translates to reliable operation in electrically noisy factory environments. The 400 mA output supports multiple 4-20 mA loop-powered transducers, HART modems, and digital isolators on a single rail. Reverse-polarity and short-circuit protection guard against mis-wired field installations, a common cause of PLC card failures. The DPAK package enables hand-solderable prototyping alongside surface-mount assembly.
推薦
Sensor and Actuator ECU Supply
Distributed sensor and actuator ECUs (seat controllers, mirror modules, HVAC flaps) operate directly from the 12 V automotive bus and need a robust 5 V local rail. The TLE42744DV50ATMA1 delivers 400 mA continuous with tight +/-2% accuracy, ideal for driving Hall-effect sensors, small DC motor pre-drivers, and PWM-controlled LED indicators. Its integrated protection features (overtemperature, short-circuit, overvoltage) are critical for actuators that may see wiring faults or load-dump events. The DPAK package's metal tab provides sufficient thermal dissipation for sustained 400 mA loads in the typical underhood or door-module thermal environment of 85C ambient.
推薦
Infotainment Head Unit Auxiliary Rail
Infotainment head units require multiple low-current 5 V rails for keypad controllers, IR receivers, rotary encoders, and auxiliary USB charging controllers. The TLE42744DV50ATMA1 provides a clean, low-EMI 5 V supply (unlike switching regulators) that does not interfere with AM/FM tuner sensitivity or audio DAC noise floors. With 400 mA available, it can power an entire auxiliary subsystem including Bluetooth/WiFi module reset rails and small display controllers. The DPAK package is widely accepted by automotive Tier-1 head-unit manufacturers and passes standard reliability stress tests including HTOL and thermal cycling per AEC-Q100 Grade 1.
推薦
Battery Management System Peripheral Supply
12 V/24 V battery management systems (BMS) for start-stop vehicles and mild-hybrid architectures use the TLE42744DV50ATMA1 to derive a 5 V rail for cell-balancing FET drivers, isolated communication controllers, and current-sense amplifiers. Its 5.5 V minimum input ensures regulation during cranking when the 12 V bus momentarily dips, while the 40 V maximum withstands 24 V jump-start scenarios. The integrated reverse-polarity protection is essential for service-shop environments where jumper-cable polarity errors are common. With AEC-Q100 Grade 1 qualification, the part is suitable for underhood BMS mounting adjacent to the battery pack.
推薦
推薦產品摘要
工程參考資料，適用於 TLE42744DV50ATMA1 — 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 | TLE42744DV33ATMA1 | TLE42702DATMA1 | IFX25001TFV50ATMA1 | TLE4274DV50ATMA1 | TLS715B0EJV50XUMA1 |
|---|---|---|---|---|---|---|
| Package | PG-TO252-3 (DPAK) | PG-TO252-3 (DPAK) - same | PG-TO252-3 (DPAK) - same | PG-TO252-3 (DPAK) - same | PG-TO252-3 (DPAK) - same | PG-TO252-3 (DPAK) - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Output Voltage | 5.0 V | 3.3 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| Maximum Output Current | 400 mA | 400 mA | 450 mA | 400 mA | 400 mA | 150 mA |
| Input Voltage Range | 5.5 V to 40 V | 5.5 V to 40 V | 5.5 V to 42 V | 5.5 V to 40 V | 5.5 V to 40 V | 5.5 V to 40 V |
| Dropout Voltage | 250 mV | 250 mV | 250 mV | 300 mV | 300 mV | 200 mV |
| Output Voltage Accuracy | +/-2% | +/-2% | +/-2% | +/-3% | +/-4% | +/-2% |
| AEC-Q100 Qualification | Yes | Yes | Yes | Yes | Yes | Yes |
主要差異化特點
- Tightest output tolerance in its Infineon LDO family (對比TLE4274DV50ATMA1)
- Higher output current than TLS715 family (對比TLS715B0EJV50XUMA1)
- Comprehensive integrated protection vs simpler legacy parts (對比IFX25001TFV50ATMA1)
設計說明
Estimated: at VIN = 14 V (typical 12 V automotive bus), VOUT = 5 V, and IOUT = 400 mA, the TLE42744DV50ATMA1 dissipates approximately 3.6 W. With DPAK theta_JA of ~50 C/W on a 1 square inch copper pour, junction temperature rises 180 C above the 25 C ambient, reaching 205 C - well above the 150 C limit. Either derate the load to ~250 mA, increase the copper pour to 3+ square inches, or add an external heatsink. Always validate thermal performance under worst-case VIN (cold-crank high current draw at low Vbat minimizes dissipation, but 24 V jump-start at 400 mA maximizes it).
Solder the metal tab (Pin 3 / VOUT) to a copper pour of at least 1 square inch on the top layer; use thermal vias to inner planes for additional heat spreading. Place the input decoupling capacitor (10 uF ceramic + 100 nF ceramic in parallel) within 5 mm of Pin 1 to suppress input-voltage ringing. The output capacitor (typically 22 uF ceramic or low-ESR electrolytic per the datasheet) should be placed within 3 mm of Pin 3 / the tab to ensure regulator loop stability. Keep high-current traces wide and short to minimize voltage drops.
Do not exceed 40 V on the input, even transiently, without external TVS protection - the datasheet's 45 V absolute maximum is not a continuous rating. During cold-crank, verify that VIN stays above 5.25 V (VOUT + dropout) for at least 90% of the cranking event; otherwise the output will fall out of regulation. Avoid reversing input polarity without external protection; although the IC has internal reverse-polarity blocking, sustained reverse voltage can damage adjacent components. Finally, never load the output with more than 400 mA continuously - the thermal shutdown may engage at 500+ mA depending on PCB thermal design.
合規資訊
AEC-Q100 qualified per Infineon datasheet. RoHS compliant per distributor listings. Halogen-free status not explicitly stated in available data - marked unknown per Data Authenticity Rule 10.
