TLE72732GV33XUMA1 - 3.3V 180mA LDO w/ Window Watchdog | Infineon
MPN: TLE72732GV33XUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.62 | $26.20 |
| 100 | $2.18 | $218.00 |
| 500 | $1.84 | $920.00 |
| 1,000 | $1.55 | $1,550.00 |
| 2,500 | $1.32 | $3,300.00 |
TLE72732GV33XUMA1 Overview
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 Β±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 Β°C to +125 Β°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.
Drop-in alternatives for TLE72732GV33XUMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLE72732GV33XUMA1 (same form factor and footprint) β differing in Input Voltage Range, Maximum Output Current, Operating Temperature, Package, RoHS Status.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TLE72732GV33XUMA2
β Drop-Inπ Reference alternative (not in catalog)
TLE72732GV33XT
β Drop-Inπ Reference alternative (not in catalog)
TLE72732GV50XUMA1
β Drop-Inπ Reference alternative (not in catalog)
TLE72732GV26XUMA1
β Drop-Inπ Reference alternative (not in catalog)
TLS810A1LDV33XUMA1
β Drop-Inβ In Stock
$0.68 / Unit
View Datasheet βTLE42702GATMA1
β Drop-Inπ Reference alternative (not in catalog)
TLE72732GV33XUMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon |
| Product Type | LDO Linear Voltage Regulator |
| Output Type | Fixed |
| Output Voltage | 3.3 V |
| Output Voltage Accuracy | Β±2% |
| Maximum Output Current | 180 mA |
| Input Voltage Range | 5.5 V to 45 V |
| Watchdog Type | Integrated window watchdog |
| Reset Output | Yes, push-pull |
| Operating Temperature | -40 Β°C to +125 Β°C (AEC-Q100 Grade 1) |
| Package | PG-DSO-14 (exposed pad) |
| Pin Count | 14 |
| Mounting Type | Surface Mount |
| Automotive Grade | AEC-Q100 qualified |
| RoHS Status | Compliant |
TLE72732GV33XUMA1 Pin Configuration
| Pin 1 | I β Input voltage (battery rail) |
| Pin 2 | I β Input voltage (battery rail, second pin for high-current) |
| Pin 3 | GND β Ground |
| Pin 4 | RO β Reset output (push-pull) |
| Pin 5 | RT β Reset delay timing (external capacitor) |
| Pin 6 | WADJ β Watchdog window adjustment (external resistor) |
| Pin 7 | WI β Watchdog input (MCU service pulse) |
| Pin 8 | Q β Output voltage (3.3V regulated) |
| Pin 9 | Q β Output voltage (second pin for high-current) |
| Pin 10 | NC β Not connected (per datasheet) |
| Pin 11 | NC β Not connected (per datasheet) |
| Pin 12 | NC β Not connected (per datasheet) |
| Pin 13 | NC β Not connected (per datasheet) |
| Pin 14 | TAB β Exposed thermal pad (connect to GND) |
Typical Applications
TLE72732GV33XUMA1 is suitable for 6 applications: 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%.
Recommended
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.
Recommended
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 Β±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 -40Β°C to +125Β°C under-dash temperature range.
Recommended
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 Β±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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for TLE72732GV33XUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Integrated window watchdog + reset on-chip (vs TLS810A1LDV33XUMA1)
- Wider 45 V input range vs 42 V on similar regulators (vs TLE42702GATMA1)
- Lower 180 mA continuous rating vs 550 mA on TLE42702GATMA1 (vs TLE42702GATMA1)
Design Notes
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 Β°C AEC-Q100 ceiling. Estimated: at VIN=12V, VOUT=3.3V, IOUT=180 mA, dissipation β 1.6 W; without a thermal pad, ΞΈJA would exceed 60 Β°C/W. With 1-2 sq-in of 2 oz copper, ΞΈJA falls to 35-45 Β°C/W, yielding a junction rise of 56-72 Β°C above 25 Β°C ambient - safe headroom for under-hood ECUs at 85 Β°C ambient.
Place input bulk capacitance (typically 22 Β΅F) as close to pins 1-2 (I) as possible to handle 12V automotive transients. Output capacitors (β₯ 4.7 Β΅F 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.
Compliance Information
AEC-Q100 Grade 1 qualified per Infineon datasheet. RoHS and REACH compliant (PG = Plastic Green, lead-free). Halogen-free per Infineon product-family standard.
