TLE72732GV33XUMA1 - 3.3V 180mA LDO w/ Window Watchdog | Infineon
MPN: TLE72732GV33XUMA1 ✓ Hoạt độngTLE72732GV33XUMA1 Tóm tắt
An LDO (Low-Dropout) regulator is a type of linear voltage regulator that can maintain a stable output voltage even when the input voltage approaches the output voltage, with dropout typically under 500 mV. Within the broader power-management IC hierarchy, LDOs sit beneath switching regulators and are preferred for low-noise rails where efficiency is secondary to ripple rejection. The TLE7273-2G family occupies the automotive microcontroller-supply sub-segment, where integrated supervision (watchdog + reset) reduces external component count on the ECU PCB.
Key features include ±2% output voltage accuracy, an integrated adjustable-window watchdog (via external resistor), a push-pull reset output with programmable reset delay, current limiting, thermal shutdown, and reverse-polarity protection on the input. The exposed pad on the PG-DSO-14 package provides low thermal resistance for sustained 180 mA loads at elevated ambient temperatures.
The regulator uses a bipolar pass-element architecture combined with a bandgap reference, optimized for automotive transient robustness including jump-start and load-dump immunity per ISO 7637. The wide VIN window (up to 45 V transient) and AEC-Q100 Grade 1 qualification (-40 °C to +125 °C junction) make it well suited to under-hood and chassis ECUs.
Typical applications include body control modules, gateway ECUs, sensor cluster power rails, HVAC controllers, and lighting ECUs. Any 12 V or 24 V automotive ECU requiring a regulated 3.3 V logic rail with built-in microcontroller supervision is a strong fit. When designing with this part, choose the external resistor at the WADJ pin carefully to set the watchdog window to match the microcontroller's service pulse timing - a misaligned window will trigger spurious resets. The exposed pad must be soldered to a sufficient copper pour to keep junction temperature within SOA at full 180 mA load.
Bộ thay thế dễ dàng lắp đặt cho TLE72732GV33XUMA1 — 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 TLE72732GV33XUMA1 (cùng hình factor và footprint) — khác nhau ở Input Voltage Range, Maximum Output Current, Operating Temperature, Package, RoHS Status.
TLE72732GV33XUMA2
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLE72732GV33XT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLE72732GV50XUMA1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLE72732GV26XUMA1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLS810A1LDV33XUMA1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TLE42702GATMA1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLE72732GV33XUMA1 Tỷ lệ tối đa & tính chất điện
| Manufacturer | Infineon |
| Product Type | LDO Linear Voltage Regulator |
| Kiểu đầu ra | Fixed |
| Điện áp đầu ra | 3.3 V |
| Output Voltage Accuracy | ±2% |
| Điện áp tối đa đầu ra | 180 mA |
| Phạm vi điện áp đầu vào | 5.5 V to 45 V |
| Watchdog Type | Integrated window watchdog |
| Reset Output | Yes, push-pull |
| Nhiệt độ hoạt động | -40 °C to +125 °C (AEC-Q100 Grade 1) |
| Hộp | PG-DSO-14 (exposed pad) |
| Số chân | 14 |
| Kiểu lắp đặt | Surface Mount |
| Automotive Grade | AEC-Q100 qualified |
| Trạng thái RoHS | Compliant |
Cấu hình chân TLE72732GV33XUMA1
| Chân 1 | I — Input voltage (battery rail) |
| Chân 2 | I — Input voltage (battery rail, second pin for high-current) |
| Chân 3 | GND — Ground |
| Chân 4 | RO — Reset output (push-pull) |
| Chân 5 | RT — Reset delay timing (external capacitor) |
| Chân 6 | WADJ — Watchdog window adjustment (external resistor) |
| Chân 7 | WI — Watchdog input (MCU service pulse) |
| Chân 8 | Q — Output voltage (3.3V regulated) |
| Chân 9 | Q — Output voltage (second pin for high-current) |
| Chân 10 | NC — Not connected (per datasheet) |
| Chân 11 | NC — Not connected (per datasheet) |
| Chân 12 | NC — Not connected (per datasheet) |
| Chân 13 | NC — Not connected (per datasheet) |
| Chân 14 | TAB — Exposed thermal pad (connect to GND) |
Ứng dụng tiêu biểu
TLE72732GV33XUMA1 phù hợp cho 6 Áp dụngs: Automotive Body Control Module (BCM), Automotive Gateway ECU, HVAC Control Module, Automotive Sensor Cluster, Automotive Lighting ECU, Industrial 24V Sensor / Controller.
Automotive Body Control Module (BCM)
The TLE72732GV33XUMA1 is purpose-built for 12V automotive body ECUs that must supervise a 3.3V microcontroller. Its 180 mA continuous load capability comfortably powers an MCU plus CAN/LIN transceivers and discrete logic. The integrated window watchdog catches stuck-at or runaway MCU firmware - a safety-critical requirement for BCMs controlling lighting, locks, and wipers - and the AEC-Q100 Grade 1 qualification plus 45V input tolerance handles jump-start and load-dump transients. Compared to a discrete LDO plus external watchdog IC, the TLE7273-2G cuts PCB area by roughly 40%.
Được đề xuất
Automotive Gateway ECU
Vehicle gateway ECUs route CAN/CAN-FD/LIN/Ethernet traffic between body, powertrain, and ADAS domains and require a reliable 3.3V rail for the host processor. The TLE72732GV33XUMA1's 5.5V-45V wide-VIN input tolerates the 24V battery systems increasingly common in heavy-truck and EV architectures. The integrated reset and window watchdog guarantee a deterministic MCU boot and ongoing firmware liveness, both mandatory for ASIL-rated gateway designs. The 14-pin PG-DSO-14 footprint minimizes PCB real estate in the typically space-constrained gateway housing.
Được đề xuất
HVAC Control Module
Heating, ventilation, and air-conditioning (HVAC) modules run MCUs that control blowers, valves, and temperature sensors, all powered from a 12V battery rail. The TLE72732GV33XUMA1's ±2% output accuracy keeps sensor readings and actuator PWM references precise, while its integrated window watchdog protects against MCU lock-ups that could disable cabin climate control. The 45V transient survival comfortably handles HVAC load-dump events from the blower-motor inductive kickback. AEC-Q100 Grade 1 qualification covers the wide -40°C to +125°C under-dash temperature range.
Được đề xuất
Automotive Sensor Cluster
Sensor clusters consolidate multiple IMU, pressure, and temperature sensors into a single ECU, each requiring a clean 3.3V supply. The TLE72732GV33XUMA1's low output noise and ±2% accuracy preserve sensor measurement precision, while 180 mA supports roughly 6-8 active sensors simultaneously. The integrated watchdog ensures the cluster's central MCU keeps servicing sensors and reporting data to the vehicle CAN bus - a missing reset could mask a critical sensor failure. PG-DSO-14 exposed pad simplifies thermal management in the cramped sensor housing.
Được đề xuất
Automotive Lighting ECU
LED headlamp and tail-light ECUs require stable 3.3V logic rails alongside high-current LED driver stages, with microcontroller supervision for adaptive-lighting and turn-signal logic. The TLE72732GV33XUMA1 supplies the MCU and housekeeping logic, while the integrated watchdog meets ISO 26262 functional-safety expectations for lighting control - a stuck MCU must not leave high beams stuck on. Reverse-polarity and load-dump protection on-chip reduce the external TVS/MOSFET bill of materials in the headlamp module.
Được đề xuất
Industrial 24V Sensor / Controller
Outside of automotive, the TLE72732GV33XUMA1 is also well suited to industrial 24V controllers and PLC I/O modules that benefit from its wide VIN tolerance and watchdog supervision. The 5.5V-45V range tolerates industrial 24V bus transients, and the window watchdog protects PLC firmware from lock-up on the factory floor. Although not specifically marketed as industrial-grade, the AEC-Q100 qualification provides headroom above typical commercial-grade temperature and reliability expectations, making the TLE7273-2G a popular choice for rugged industrial sensor platforms.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TLE72732GV33XUMA1 — 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 | TLE72732GV33XUMA2 | TLE72732GV33XT | TLE72732GV50XUMA1 | TLE72732GV26XUMA1 | TLS810A1LDV33XUMA1 | TLE42702GATMA1 |
|---|---|---|---|---|---|---|---|
| Package | PG-DSO-14 (exposed pad) | PG-DSO-14 (exposed pad) - same | PG-DSO-14 (exposed pad) - same | PG-DSO-14 (exposed pad) - same | PG-DSO-14 (exposed pad) - same | PG-DSO-14 (exposed pad) - same | PG-DSO-14 (exposed pad) - same |
| Brand | Infineon | Infineon - same | Infineon - same | Infineon - same | Infineon - same | Infineon - same | Infineon - same |
| Output Voltage | 3.3 V | 3.3 V | 3.3 V | 5.0 V | 2.6 V | 3.3 V | 5.0 V |
| Maximum Output Current | 180 mA | 180 mA | 180 mA | 180 mA | 180 mA | 180 mA | 550 mA |
| Input Voltage Range | 5.5 V to 45 V | 5.5 V to 45 V | 5.5 V to 45 V | 5.5 V to 45 V | 5.5 V to 45 V | 3.0 V to 40 V | 5.5 V to 42 V |
| Window Watchdog | Yes | Yes | Yes | Yes | Yes | No | No |
| Reset Output | Yes (push-pull) | Yes | Yes | Yes | Yes | No | Yes |
| AEC-Q100 Grade | Grade 1 | Grade 1 | Grade 1 | Grade 1 | Grade 1 | Grade 1 | Grade 1 |
| Approx. 1k Price (USD) | 1.55 | 1.55 | 1.55 | 1.55 | 1.55 | 1.20 | 1.10 |
Bảo phân biệt quan trọng
- Integrated window watchdog + reset on-chip (vsTLS810A1LDV33XUMA1)
- Wider 45 V input range vs 42 V on similar regulators (vsTLE42702GATMA1)
- Lower 180 mA continuous rating vs 550 mA on TLE42702GATMA1 (vsTLE42702GATMA1)
Ghi chú thiết kế
The PG-DSO-14 exposed pad must be soldered to a PCB copper pour of at least 1 square inch to keep junction temperature below the 125 °C AEC-Q100 ceiling. Estimated: at VIN=12V, VOUT=3.3V, IOUT=180 mA, dissipation ≈ 1.6 W; without a thermal pad, θJA would exceed 60 °C/W. With 1-2 sq-in of 2 oz copper, θJA falls to 35-45 °C/W, yielding a junction rise of 56-72 °C above 25 °C ambient - safe headroom for under-hood ECUs at 85 °C ambient.
Place input bulk capacitance (typically 22 µF) as close to pins 1-2 (I) as possible to handle 12V automotive transients. Output capacitors (≥ 4.7 µF ceramic, low-ESR) should be within 5 mm of pins 8-9 (Q) for loop stability. Keep the WADJ resistor and RT capacitor traces short - long traces pick up noise that can falsely trigger watchdog or reset events. The exposed pad (pin 14 / TAB) should be soldered to a continuous ground pour with multiple thermal vias to the inner/ground plane.
Selecting the wrong WADJ resistor value is the most common TLE7273-2G design error - it produces spurious watchdog resets (window too narrow) or fails to catch MCU faults (window too wide). Always calculate the resistor per the datasheet's WADJ equation based on the MCU's worst-case service-pulse period under all operating conditions. Do not omit the RT reset-delay capacitor; without it the reset pulse width is undefined and the MCU may boot unpredictably. Finally, verify that input transients (jump-start, load-dump) are within the 45V absolute-max rating - additional TVS protection may be required for 24V commercial-vehicle applications.
Thông tin tuân thủ
AEC-Q100 Grade 1 qualified per Infineon datasheet. RoHS and REACH compliant (PG = Plastic Green, lead-free). Halogen-free per Infineon product-family standard.
