TLE4252DATMA1 - 250mA, 40V Tracking LDO Regulator | Infineon
MPN： TLE4252DATMA1 ✓ 啟用中TLE4252DATMA1 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 very close to the output voltage. LDOs are a subset of linear regulators, which in turn belong to the voltage regulator category within power management ICs. Tracking regulators such as the TLE4252D add a feedback loop that forces the output to follow an external reference voltage rather than an internal bandgap - this is critical for off-board sensor supplies and ECU rails where a remote reference must be reproduced accurately at the load.
Key features include very low dropout voltage of typically 200 mV at 100 mA, very low quiescent current of typically 60 µA in normal operation, integrated output current limiting, reverse polarity protection at the input, and overtemperature shutdown. The device also includes an enable input for power sequencing and a status output that signals regulation faults to a host microcontroller. The TO-252-5 package with an exposed tab offers low thermal resistance for sustained 250 mA loads on a moderate copper area.
The TLE4252D uses a PNP pass-element topology that combines low dropout with low quiescent current, achieving tracking accuracy within ±2 mV of the reference. This architecture makes the part especially well suited to supplying off-board sensors where the supply voltage must track an ECU reference without a level-shifting amplifier between them.
Typical applications include automotive sensor supplies, ECU sub-rails, body and chassis controllers, and industrial 24 V sensor signal conditioning. The wide input range tolerates load-dump transients up to 40 V common in 12 V automotive electrical systems.
When designing with this device, ensure that the input bulk capacitance is sized to suppress load-dump excursions and that the exposed tab is soldered to at least 1 cm² of copper to keep junction temperature within safe limits under sustained 250 mA load.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet to accelerate BOM validation and second-source planning.
直接替換替代品，適用於 TLE4252DATMA1 — 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： TLE4252DATMA1 （相同外形與佔位） — 差異在於 Maximum Output Current, Operating Temperature Range, Package, Input Voltage Range, AEC-Q100 Qualification.
TLE4253-1
✅ 直接替換📋 參考替代品（不在目錄中）
TLE4254G
✅ 直接替換📋 參考替代品（不在目錄中）
TLE42694G
✅ 直接替換📋 參考替代品（不在目錄中）
TLE42744DV50ATMA1
✅ 直接替換聯絡詢價
查看資料表 →TL720M05
✅ 直接替換📋 參考替代品（不在目錄中）
IFX1051LE
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TLE4252DATMA1 最大額定值與電氣特性
| 輸出類型 | Adjustable (tracking) |
| 輸出電壓範圍 | 1.5 V to 45 V |
| 最大輸出電流 | 250 mA |
| 輸入電壓範圍 | Up to 40 V |
| 壓降電壓 | 200 mV typical at 100 mA |
| 靜態電流 | 60 µA typical (normal operation) |
| Tracking Accuracy | ±2 mV to ADJ reference |
| 致能腳位 | Yes (active-high) |
| Status Output | Yes (open-drain fault indicator) |
| Reverse Polarity Protection | Yes (integrated) |
| Overtemperature Shutdown | Yes |
| 工作溫度範圍 | -40 °C to +150 °C (junction) |
| 封裝 | PG-TO252-5-11 (DPAK-5, 4 leads + tab) |
| 安裝類型 | Surface Mount |
| AEC-Q100 Qualification | Yes (automotive grade) |
| RoHS 狀態 | Compliant |
TLE4252DATMA1 腳位配置
| 腳位 1 | IN — Input voltage (up to 40 V) |
| 腳位 2 | EN — Enable (active-high) |
| 腳位 3 | GND — Ground reference |
| 腳位 4 | STATUS — Open-drain fault indicator |
| 腳位 5 | ADJ — Tracking reference input |
| 腳位 TAB | TAB — Thermal pad / package tab |
典型應用
TLE4252DATMA1 適用於 6 應用s: Automotive Sensor Power Supply, Engine Control Unit Sub-Rail, Body and Chassis Controller, Industrial 24 V Sensor Conditioning, Off-Board Sensor Supply with Remote Reference, Automotive Infotainment Auxiliary Rail.
Automotive Sensor Power Supply
The TLE4252DATMA1 delivers a tightly tracked voltage to off-board sensors that share the ECU ground reference. Its tracking topology forces VOUT to follow the ADJ reference within ±2 mV, eliminating level-shifting amplifiers for remote sensor loads. With 250 mA current capability, the part can power multiple sensor loads or a small signal-conditioning block from a single rail. The 40 V input range tolerates 12 V automotive load-dump transients without external clamping.
推薦
Engine Control Unit Sub-Rail
The TLE4252DATMA1 provides a clean, reverse-polarity-protected 5 V (or adjustable) sub-rail inside an ECU that must remain stable during cold-crank and load-dump events. Its 200 mV dropout at 100 mA holds regulation when the 12 V battery sags to 6 V during engine start. The AEC-Q100 qualification and -40 °C to +150 °C junction rating cover under-hood environments. Integrated status output drives a fault flag back to the microcontroller for diagnostics.
推薦
Body and Chassis Controller
Body controller modules (BCM) for lighting, door, and seat control need reliable low-current rails fed directly from the 12 V battery. The TLE4252DATMA1 handles the 40 V load-dump envelope and integrates reverse-polarity protection that survives accidental reverse-battery events during service. Its 60 µA quiescent current keeps standby drain minimal on always-on BCM rails, and the enable pin allows the MCU to switch the regulator in and out of low-power states.
推薦
Industrial 24 V Sensor Conditioning
In factory automation, 24 V PLC sensor rails often need a precise sub-rail that follows the analog backplane reference. The TLE4252DATMA1 tracks an external 5 V or 10 V reference with ±2 mV accuracy, generating a stable 24 V-compatible sub-rail without a level-shifting amplifier. Its 40 V input withstands 24 V industrial transients, and the DPAK-5 package dissipates moderate power on a small footprint for DIN-rail-mounted I/O modules.
推薦
Off-Board Sensor Supply with Remote Reference
The TLE4252DATMA1 is purpose-built for sensor heads located away from the ECU where the supply must track the ECU reference through long cable runs. The tracking topology cancels ground offsets between ECU and sensor, producing a clean, regulated rail at the sensor end. Integrated reverse-polarity protection on the input prevents damage from mis-wiring during harness assembly - a common failure mode in production.
推薦
Automotive Infotainment Auxiliary Rail
Infotainment head units and telematic modules need auxiliary rails that remain stable during cranking. The TLE4252DATMA1 produces a low-noise tracking rail from the 12 V battery rail that stays in regulation down to ~5.2 V at the input - ideal for keeping a small MCU or audio DSP rail alive during engine cranking. Its 60 µA quiescent current minimizes drain on the battery when the infotainment module is in standby.
推薦
推薦產品摘要
工程參考資料，適用於 TLE4252DATMA1 — 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 | TLE4253-1 | TLE4254G | TLE42694G | TLE42744DV50 | TL720M05 |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Texas Instruments |
| Package | PG-TO252-5-11 (DPAK-5) | PG-TO252-5-11 - same | PG-TO252-5-11 - same | PG-TO252-5-11 - same | PG-TO252-5-11 - same | TO-252-5 - same footprint |
| Output Type | Adjustable tracking | Fixed 5 V tracking | Adjustable tracking | Fixed 5 V LDO | Fixed 5 V LDO | Fixed 5 V tracking |
| Output Current | 250 mA | 250 mA (same) | 500 mA (+100%) | 150 mA (-40%) | 400 mA (+60%) | 450 mA (+80%) |
| Input Voltage (max) | 40 V | 40 V | 45 V | 45 V | 45 V | 45 V |
| Dropout Voltage | 200 mV at 100 mA | 200 mV at 100 mA | 300 mV at 250 mA | 250 mV at 100 mA | 250 mV at 200 mA | 300 mV at 250 mA |
| Quiescent Current | 60 µA | 60 µA | 80 µA | 65 µA | 85 µA | 100 µA |
| AEC-Q100 | Yes | Yes | Yes | Yes | Yes | Yes |
| Reverse Polarity Protection | Yes (integrated) | Yes | Yes | Yes | Yes | No (external required) |
主要差異化特點
- Tracking topology with ±2 mV accuracy to ADJ reference (對比TLE42644G)
- Integrated reverse polarity protection on input (對比TL720M05)
- 60 µA quiescent current for always-on automotive rails (對比TLE4254G)
設計說明
At VIN = 13.5 V, VOUT = 5 V, and 250 mA continuous load, the regulator dissipates approximately (13.5 - 5) × 0.25 = 2.1 W. Estimated: with theta_JA around 60 °C/W for the DPAK-5 package on 1 cm² of copper, junction rise is 2.1 W × 60 °C/W ≈ 126 °C above ambient. Use at least 2-3 cm² of copper on the exposed tab, and keep ambient below 70 °C for sustained full load at the 150 °C junction limit.
Place the input bulk capacitor as close as possible to the IN pin to suppress load-dump ringing. A 10 µF ceramic + 47 µF aluminum combination on the input is recommended for 12 V automotive rails. The output capacitor value depends on the ADJ reference impedance - typically 1 µF to 22 µF ceramic ESR < 1 Ω maintains loop stability. Connect the exposed tab to a copper pour that is electrically bonded to GND per the datasheet.
Do not exceed the 40 V absolute-maximum input voltage, even momentarily - load-dump pulses on 12 V automotive rails can reach 35-40 V. Verify the STATUS pin pull-up voltage does not exceed the host MCU's input rating (open-drain output can be pulled to any rail up to 40 V). Ensure the ADJ reference is low-impedance: a high-impedance reference degrades tracking accuracy and can cause oscillation.
Route the GND pin directly to the ground copper pour - avoid sharing GND paths with high-current switching nodes. Keep the ADJ trace short and shielded from switching noise to preserve the ±2 mV tracking accuracy. For off-board sensor applications, ensure the cable shield is bonded to GND at the ECU end only to prevent ground loops.
合規資訊
AEC-Q100 qualified per Infineon OPTIREG™ family datasheet. RoHS and REACH compliant. Halogen-free per Infineon product declarations. Lead-free reflow-compatible per JEDEC J-STD-020.
