Infineon Technologies TLE72732GV33XUMA1

Overview

TLE72732GV33XUMA1 from Infineon Technologies is a monolithic automotive-grade LDO voltage regulator with integrated window watchdog and power-on reset, delivering 3.3 V ±2% output at up to 180 mA, ultra-low 36 µA quiescent current, and operation from 4.2 V to 45 V input across –40 °C to +150 °C junction temperature - deployed in always-on body control modules and microcontroller power supplies.

For engineers reviewing the TLE72732GV33XUMA1 datasheet, TLE72732GV33XUMA1 pinout, TLE72732GV33XUMA1 application, or TLE72732GV33XUMA1 equivalent, key selection criteria include its adjustable power-on reset delay, current-dependent watchdog deactivation, open-drain reset output requiring external pull-up, thermal shutdown behavior, and PG-DSO-14 package compatibility with high-temperature PCB layouts.

Technical Context

The TLE72732GV33XUMA1 integrates a bandgap-referenced LDO regulator, charge-pump-based window watchdog with mode selection via WM1/WM2 pins, and a reset generator with glitch immunity (t_RR = 10 µs). Its reset threshold (V_RT) is fixed at 2.97 V for 3.3 V output variants, and reset delay (t_RD) is typ. 16 ms.

Watchdog timing is configurable through WM1/WM2 logic states (four modes), with fast mode yielding ~32 ms open window and ~16 ms ignore window; watchdog deactivation occurs when WDI is held low and WM1/WM2 are both high. The device uses internal overtemperature shutdown and output current limiting (typ. 220 mA) for fault protection.

Key Specifications

Pinout & Package

Package: PG-DSO-14 (RoHS-compliant, thermally enhanced SOIC-14 with exposed pad connected to GND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO-with-watchdog applications.

Compared with TLV70733PDRVR and MAX16910ATA+T, the TLE72732GV33XUMA1 uniquely combines AEC-Q100 Grade 0 qualification, 150 °C operation, open-drain reset with external pull-up flexibility, and current-dependent watchdog disable - making it the only choice for safety-critical, high-temperature automotive domains requiring self-contained supervision.

Availability

TLE72732GV33XUMA1 is available at Aetrix Electronics and suitable for body control modules, engine control subsystems, transmission control units, and ADAS camera ECUs requiring stable component supply under extended temperature and automotive voltage stress conditions.

Supply support for TLE72732GV33XUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and AEC-Q100 validation infrastructure.

The TLE7273-2 product line delivers integrated power-supervision ICs for automotive microcontrollers - designed specifically to replace discrete reset ICs, watchdog timers, and LDOs in space-constrained, high-reliability vehicle domains.

FAQ

What is the minimum input voltage required for regulation at 180 mA output?

The TLE72732GV33XUMA1 maintains 3.3 V regulation down to 4.2 V input at full 180 mA load, verified per functional range Table 4.2.2. This enables reliable operation during automotive cold-crank events where battery voltage dips to 4.2 V, provided the dropout voltage (typically <300 mV) is accounted for in layout design.

How is the reset output configured for the TLE72732GV33XUMA1 variant?

This variant uses an open-drain RO pin requiring an external pull-up resistor. For 5 V systems, a ≥4.75 kΩ resistor is recommended; for 3.3 V systems, ≥2.2 kΩ ensures sufficient sink current (1 mA) while keeping V_RO ≤0.25 V during active reset. No internal pull-up is present - unlike the GV50/EV50 versions.

Can the watchdog be disabled permanently, and how?

Yes - tie WDI to GND and set both WM1 and WM2 to logic high (connected to Q output). This configuration disables watchdog monitoring entirely while preserving reset functionality and LDO regulation. The device remains fully operational except for watchdog supervision, confirmed in Figure 5 state diagram and Section 5.1.2.

What thermal performance can be expected with standard PCB layout?

On a 2-layer FR4 board (76.2 × 114.3 mm, 35 µm Cu), R_thJA is 53 K/W (PG-DSO-14). With a 600 mm² copper heatsink area connected to pins 2–5 and 10–12, junction-to-ambient resistance drops to 65 K/W - enabling 180 mA continuous output at 150 °C ambient if power dissipation stays ≤0.9 W (calculated as (45 V − 3.3 V) × 0.18 A × 0.065 K/W ≈ 0.49 °C rise).