Infineon Technologies TLE4275GV33ATMA1

Overview

TLE4275GV33ATMA1 from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering a fixed 3.3 V ±2 % output at up to 400 mA, featuring integrated reset generation with programmable delay, reverse polarity protection, short-circuit and overtemperature shutdown, and operation across -40 °C to +150 °C junction temperature - designed for microcontroller power supply in automotive body control modules.

For engineers reviewing the TLE4275GV33ATMA1 datasheet, TLE4275GV33ATMA1 pinout, TLE4275GV33ATMA1 application, or TLE4275GV33ATMA1 equivalent, key selection criteria include input voltage range (-42 V to +45 V), ceramic capacitor stability (≥22 µF, ESR ≤3 Ω), open-collector reset output (RO) with 1 V minimum functional threshold, and PG-TO252-5-11 / PG-TO263-5-1 package thermal performance (R_th,j-a = 144 K/W footprint only).

Technical Context

The device integrates a PNP pass transistor controlled by an internal bandgap reference and error amplifier, with stability conditioned on output capacitance (22 µF min) and ESR (≤3 Ω). Protection circuitry includes current limiting that reduces max output current above VI = 22 V, thermal shutdown at 151–200 °C with 25 K hysteresis, and reverse-polarity operation support with external current path considerations.

The reset function operates independently of input supply: RO remains active low down to VQ = 1 V, powered from the output capacitor during battery disconnect. Delay timing is set via external capacitor CD on pin D, with separate multipliers for power-on (F_d,PWR-ON) and undervoltage (F_d) delay calculation, and total reaction time comprising internal propagation plus CD discharge.

Key Specifications

Pinout & Package

Available in two RoHS-compliant thermally enhanced packages: PG-TO252-5-11 (D-Pak variant with exposed tab connected to GND) and PG-TO263-5-1 (TO-263 variant with dedicated GND pin and shared tab-to-GND connection). Both support heatsinking via PCB copper area (600 mm² reduces R_th,j-a to 55 K/W and 39 K/W respectively).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO regulator applications.

Compared with TLV73333PDBVR and MAX1725EUT33+T, TLE4275GV33ATMA1 uniquely combines 400 mA output, -42 V to +45 V input, AEC-Q100 Grade 0 qualification, and programmable reset - making it the only option for primary microcontroller supply in harsh automotive environments requiring extended voltage and temperature resilience.

Availability

TLE4275GV33ATMA1 is available at Aetrix Electronics and suitable for automotive body control modules, engine control unit subsystems, ADAS camera ECUs, and electric power steering motor controllers requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLE4275GV33ATMA1 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 TLE4275 series belongs to Infineon's automotive linear regulator product line, engineered specifically for robust, fail-safe power delivery to microcontrollers and safety-critical subsystems in vehicles - emphasizing reverse-battery resilience, wide temperature operation, and integrated supervision functions.

FAQ

What is the minimum output capacitance required for stable operation?

The TLE4275GV33ATMA1 requires a minimum 22 µF ceramic output capacitor with ESR ≤3 Ω, accounting for worst-case ±30 % capacitance tolerance. This value ensures phase margin and transient response meet specification across -40 °C to +150 °C and 1–400 mA load range. X7R or X5R dielectrics are recommended; placement must be adjacent to pin 5 (Q) and GND.

Can the reset function operate when the input voltage is disconnected?

Yes - the reset circuit is powered from the output capacitor (pin 5, Q), enabling RO to remain active low down to VQ = 1 V even when VI = 0 V. This ensures deterministic microcontroller reset behavior during battery disconnection or cold-cranking, independent of input supply state.

How does thermal shutdown behave during continuous short-circuit conditions?

Under continuous output short-circuit, the thermal shutdown circuit disables the pass transistor when junction temperature exceeds 151–200 °C, then automatically restarts once Tj falls below the hysteresis threshold (≈126–175 °C). This causes oscillatory output voltage until the fault is removed - intended for fault containment, not continuous operation.

Is the PG-TO252-5-11 package pin-compatible with PG-TO263-5-1?

No - while both packages share identical pin numbering and signal assignment (I, RO, GND, D, Q), the PG-TO252-5-11 uses the exposed tab as GND (no dedicated pin 3), whereas PG-TO263-5-1 provides a separate GND pin (pin 3) and connects the tab to it. PCB layout and thermal pad routing must be redesigned between variants.