TLE72742DATMA1 - 300mA 5V LDO Regulator, 42V Input | Infineon
MPN： TLE72742DATMA1 ✓ 啟用中TLE72742DATMA1 概覽
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output differential is small, making it ideal as a post-regulator following a pre-converter or for direct use on noisy automotive battery rails. Within the broader power management taxonomy, an LDO belongs to the linear regulator family, which is itself a sub-category of voltage regulators and ultimately part of the power management IC hierarchy used in every automotive ECU.
Key features of the TLE72742DATMA1 include very low quiescent current in standby, integrated output current limiting, thermal shutdown, reverse-polarity protection, and stable operation with small ceramic output capacitors. The wide input voltage range tolerates load-dump transients up to 42 V typical in 12 V automotive systems, while the precision bandgap reference holds Vout within ±2 % across line, load, and temperature variation.
The device is fabricated using Infineon's robust bipolar process technology optimized for automotive environments. The architecture combines a PNP pass element with comprehensive protection circuitry, enabling reliable operation at junction temperatures up to 150 °C while maintaining tight regulation. The PG-TO252-3 (DPAK) package features an exposed tab that serves as the heatsink, achieving a junction-to-ambient thermal resistance suitable for continuous 300 mA delivery.
Typical applications include microcontroller power supplies in body control modules, sensor and actuator power rails, infotainment subsystems, and industrial 24 V bus regulation. Automotive grade qualification makes the part suited for under-hood and cabin-mounted ECUs requiring long-term reliability.
Designers should provide adequate PCB copper area on the tab to keep junction temperature within limits, and place input/output ceramic capacitors close to the pins. The wide VIN range makes the device tolerant of cold-crank and load-dump conditions typical of automotive environments.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on standard catalog pages.
直接替換替代品，適用於 TLE72742DATMA1 — 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： TLE72742DATMA1 （相同外形與佔位） — 差異在於 Maximum Output Current, Package, Input Voltage Range, Operating Temperature Range, Output Voltage Accuracy.
TLE7274DNTMA1
✅ 直接替換📋 參考替代品（不在目錄中）
TLE7274-2D
✅ 直接替換📋 參考替代品（不在目錄中）
TLE42662GSV33HTMA2
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TLE42754DATMA1
✅ 直接替換聯絡詢價
查看資料表 →TLE72742DATMA1 最大額定值與電氣特性
| Regulator Type | LDO (Low-Dropout) Linear, Fixed Output |
| 輸出電壓 | 5.0 V nominal |
| Output Voltage Accuracy | ±2 % |
| 最大輸出電流 | 300 mA |
| 輸入電壓範圍 | 5.5 V to 42 V |
| Quiescent Current (standby) | Low (per datasheet) |
| Output Capacitor | Stable with ceramic capacitor |
| 工作溫度範圍 | -40 °C to +150 °C (junction) |
| 過熱關機 | Integrated |
| 電流限制 | Integrated |
| Reverse Polarity Protection | Yes |
| 封裝 | PG-TO252-3 (DPAK, 2 Leads + Tab), SC-63 |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Automotive Grade | Yes (AEC-Q100 qualified) |
TLE72742DATMA1 腳位配置
| 腳位 1 | IN — Input voltage supply (5.5 V to 42 V) |
| 腳位 2 | GND — Ground reference |
| 腳位 3 | OUT — Regulated 5 V output |
典型應用
TLE72742DATMA1 適用於 6 應用s: Automotive Body Control Module (BCM) 5 V Rail, Instrument Cluster and Dashboard Power, Sensor and Actuator ECU 5 V Supply, Industrial 24 V Bus Regulation, Infotainment and HMI Auxiliary Power, Power Supply for CAN/LIN Transceiver Modules.
Automotive Body Control Module (BCM) 5 V Rail
The TLE72742DATMA1 supplies the 5 V rail for body control modules that drive lighting, wipers, door locks, and mirror actuators. The wide 5.5 V to 42 V input tolerates 12 V battery cold-crank (down to 6 V) and 42 V load-dump transients per ISO 7637-2. With 300 mA continuous current and ±2 % output accuracy, it cleanly powers the host MCU plus several sensor inputs. The integrated reverse-polarity and thermal-shutdown protection makes it ideal for underhood and cabin-mounted ECUs where field reliability is critical.
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Instrument Cluster and Dashboard Power
Instrument clusters require a low-noise 5 V supply for the display driver MCU, backlight controller, and indicator LEDs. The TLE72742DATMA1's linear architecture produces no switching ripple, eliminating EMI that would couple into the analog gauge drivers or the CAN bus transceiver sharing the same PCB. Its 300 mA budget comfortably supports a small MCU, a CAN transceiver, and several LED backlight strings in parallel. AEC-Q100 qualification ensures long-term reliability in the cabin thermal environment up to 105 °C ambient.
推薦
Sensor and Actuator ECU 5 V Supply
Sensor ECUs for parking assist, rain/light sensing, and tire-pressure monitoring need a compact, low-quiescent 5 V rail that survives automotive transients. The TLE72742DATMA1 delivers this with reverse-polarity protection and integrated current limiting - critical when sensor harnesses may be miswired during service. Its 42 V load-dump tolerance and -40 °C to +150 °C junction rating cover underhood and wheel-well mounting positions. The PG-TO252-3 DPAK footprint offers a small board area with excellent thermal performance for sealed modules.
推薦
Industrial 24 V Bus Regulation
Industrial PLCs and remote I/O modules often derive a 5 V logic rail from a 24 V nominal bus that can swing between 18 V and 36 V. The TLE72742DATMA1's 5.5 V to 42 V input range covers this entire window plus transient headroom, making it a clean post-regulator solution. Although the LDO dissipates (VIN - 5 V) × IOUT, at typical 300 mA and 24 V VIN this is roughly 5.7 W - manageable with a modest copper pour on the PG-TO252-3 tab. No inductors are required, simplifying EMI-sensitive analog front ends.
推薦
Infotainment and HMI Auxiliary Power
Infotainment head units and HMI panels need an auxiliary 5 V rail for standby microcontroller, keypad scanner, and capacitive touch controller. The TLE72742DATMA1 provides this rail directly from the 12 V battery feed with full automotive transient protection. Its low standby quiescent current suits always-on subsystems that must wake the main processor via CAN or LIN. The DPAK package is small enough to fit behind the head-unit PCB while still dissipating the necessary power at 300 mA load.
推薦
Power Supply for CAN/LIN Transceiver Modules
Standalone CAN and LIN transceiver modules require a stable 5 V supply for the transceiver IC and optional isolator. The TLE72742DATMA1 is well-matched because its 5 V fixed output directly feeds ISO 11898 CAN transceivers, while its wide VIN input handles the 12 V or 24 V vehicle bus. Integrated current limiting and thermal shutdown protect the module if the output is shorted during harness assembly. The AEC-Q100 grade and PG-TO252-3 footprint simplify PCB layout in distributed in-vehicle networks.
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推薦產品摘要
工程參考資料，適用於 TLE72742DATMA1 — 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 | TLE7274DNTMA1 | TLE7274-2D | TLE42662GSV33HTMA2 | TLE42754DATMA1 |
|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| 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 |
| Output Voltage | 5.0 V | 5.0 V | 5.0 V | 3.3 V | 5.0 V |
| Automotive Grade (AEC-Q100) | Yes | Yes | Yes | Yes | Yes |
主要差異化特點
- Wide 42 V input voltage rating tolerates automotive load-dump (對比TLE42662GSV33HTMA2)
- 300 mA continuous output with internal current limit (對比TLE42754DATMA1)
- Reverse-polarity protection integrated on the silicon (對比TLE7274-2D (bare die))
設計說明
At VIN=12 V, VOUT=5 V, and 300 mA load, power dissipation is roughly (12-5) × 0.3 = 2.1 W. With PG-TO252-3 mounted on approximately 1 square inch of 2 oz copper, the junction-to-ambient thermal resistance (theta_JA) is around 50 °C/W, giving a junction rise of ~105 °C above 25 °C ambient. Estimated: at 85 °C ambient, junction temperature reaches ~190 °C - above the 150 °C rating. Increase copper area to 2-3 sq inch or use a top-side thermal via farm to keep Tj within limits.
Place the input capacitor (≥1 µF ceramic, X7R) directly at the IN pin with a short trace to the GND pin. Place the output capacitor (≥1 µF ceramic, X7R) directly at the OUT pin with the ground return connected to the same GND plane. Keep the tab copper pour continuous and unbroken under the device to maximize heat spreading. Avoid routing high-current or switching traces near the feedback path to prevent injected noise on the 5 V rail.
Do not operate with VIN below 5.5 V - the regulator requires headroom to maintain regulation. Verify that downstream loads do not exceed 300 mA continuous; short-duration peaks beyond 300 mA are tolerated by the current-limit circuit but sustained overload triggers thermal shutdown. Do not exceed 42 V on the input or reverse-polarity events (with VIN negative) without considering the protection network. Finally, do not omit the input/output capacitors - the part is stable with ceramic capacitors but ESR and value are critical for loop stability.
合規資訊
AEC-Q100 qualified for automotive applications. RoHS and REACH compliance per Infineon product page. Halogen-free status not explicitly stated in provided data.
