Infineon Technologies TLE72732GV26XUMA1

Overview

TLE72732GV26XUMA1 from Infineon Technologies is an automotive-grade monolithic low-dropout voltage regulator with integrated window watchdog and power-on reset, delivering a fixed 2.6 V output at up to 180 mA, ±2% output tolerance, <36 µA quiescent current, and operation from 4.5 V to 45 V input across –40 °C to +150 °C junction temperature - deployed in engine control units for microcontroller core supply under battery-permanent connection.

For engineers reviewing the TLE72732GV26XUMA1 datasheet, TLE72732GV26XUMA1 pinout, TLE72732GV26XUMA1 application, or TLE72732GV26XUMA1 equivalent, key selection criteria include ultra-low quiescent current for always-on systems, adjustable power-on reset delay, current-dependent watchdog deactivation, thermal shutdown behavior, and PG-DSO-14 package compatibility with exposed-pad thermal management.

Technical Context

The TLE72732GV26XUMA1 implements a bandgap-referenced LDO regulator with charge-pump-assisted enable and reset generation. Its window watchdog uses a fraction of the internal oscillator clock, configurable via WM1/WM2 pins for four timing modes including disable, and features current-dependent deactivation during overcurrent events.

Reset functionality includes a 16 ms typ. power-up delay (t_RD), glitch immunity via t_RR (reset reaction time), and threshold-based assertion (V_RT) at V_Q < 1 V or falling below V_RT; the RO pin is open-drain for TLE7273-2GV26, requiring external pull-up.

Key Specifications

Pinout & Package

Package: PG-DSO-14 (14-pin plastic dual small outline, exposed pad variant not used for this marking; thermal path via pins 2–5 and 10–12 to GND plane).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV70726PDPWR and MAX16922ATG/V+T, the TLE72732GV26XUMA1 uniquely combines AEC-Q100 Grade 0 qualification, 45 V input tolerance, and current-dependent watchdog deactivation - making it the only choice for high-temperature, high-transient engine bay applications requiring single-chip safety supervision.

Availability

TLE72732GV26XUMA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and ADAS camera ECUs requiring stable component supply under automotive qualification and long-lifecycle support.

Supply support for TLE72732GV26XUMA1 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 security solutions, with global manufacturing and automotive qualification infrastructure.

The TLE7273-2 product line delivers integrated power-supervision ICs for automotive microcontrollers - combining LDO regulation, reset generation, and window watchdog in a single AEC-Q100-qualified device for functional safety compliance.

FAQ

What is the minimum input voltage required for regulation at 2.6 V output?

The TLE72732GV26XUMA1 maintains regulation down to 4.5 V input at full 180 mA load, per its functional range specification. Below 4.5 V, dropout occurs and output voltage drops linearly with input; the device remains operational but does not regulate. This threshold accommodates automotive cold-crank conditions per ISO 16750-2.

How is the reset output (RO) configured for TLE72732GV26XUMA1?

The RO pin is open-drain for the GV26 variant, requiring an external pull-up resistor to a voltage rail ≥2.6 V. A minimum value of 4.75 kΩ is calculated based on 1.0 mA sink current and 0.25 V low-level voltage; typical designs use 4.7 kΩ to 10 kΩ. No internal pull-up exists - leaving RO unconnected results in floating reset state.

Can the watchdog be fully disabled, and how?

Yes - tie both WM1 and WM2 pins to the Q output voltage (2.6 V), and connect WDI to GND. This configuration places the watchdog in permanent disable mode per the state diagram in the datasheet. The device continues regulating and generating reset signals normally, with no watchdog timing or pulse monitoring active.

What thermal design guidance applies to the PG-DSO-14 package?

Thermal performance relies on connecting pins 2–5 and 10–12 to a large GND copper pour. With a 2-layer FR4 board (2s2p), R_thJA is 53 K/W; adding a 600 mm² heatsink area reduces it to 65 K/W. For 180 mA at 45 V input, power dissipation reaches ~7.5 W - requiring ≥300 mm² GND area and thermal vias to maintain T_j ≤150 °C at 85 °C ambient.