TLE4252DATMA1 - 250mA, 40V Tracking LDO Regulator | Infineon
MPN: TLE4252DATMA1 ✓ Hoạt độngTLE4252DATMA1 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho TLE4252DATMA1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TLE4252DATMA1 (cùng hình factor và footprint) — khác nhau ở Maximum Output Current, Operating Temperature Range, Package, Input Voltage Range, AEC-Q100 Qualification.
TLE4253-1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLE4254G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLE42694G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLE42744DV50ATMA1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TL720M05
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
IFX1051LE
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TLE4252DATMA1 Tỷ lệ tối đa & tính chất điện
| Kiểu đầu ra | Adjustable (tracking) |
| Khoảng điện áp đầu ra | 1.5 V to 45 V |
| Điện áp tối đa đầu ra | 250 mA |
| Phạm vi điện áp đầu vào | Up to 40 V |
| Điện áp mất áp | 200 mV typical at 100 mA |
| Điện áp yên tĩnh | 60 µA typical (normal operation) |
| Tracking Accuracy | ±2 mV to ADJ reference |
| N Nap kích hoạt | Yes (active-high) |
| Status Output | Yes (open-drain fault indicator) |
| Reverse Polarity Protection | Yes (integrated) |
| Overtemperature Shutdown | Yes |
| Khoảng nhiệt độ hoạt động | -40 °C to +150 °C (junction) |
| Hộp | PG-TO252-5-11 (DPAK-5, 4 leads + tab) |
| Kiểu lắp đặt | Surface Mount |
| AEC-Q100 Qualification | Yes (automotive grade) |
| Trạng thái RoHS | Compliant |
Cấu hình chân TLE4252DATMA1
| Chân 1 | IN — Input voltage (up to 40 V) |
| Chân 2 | EN — Enable (active-high) |
| Chân 3 | GND — Ground reference |
| Chân 4 | STATUS — Open-drain fault indicator |
| Chân 5 | ADJ — Tracking reference input |
| Chân TAB | TAB — Thermal pad / package tab |
Ứng dụng tiêu biểu
TLE4252DATMA1 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TLE4252DATMA1 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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) |
Bảo phân biệt quan trọng
- Tracking topology with ±2 mV accuracy to ADJ reference (vsTLE42644G)
- Integrated reverse polarity protection on input (vsTL720M05)
- 60 µA quiescent current for always-on automotive rails (vsTLE4254G)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
