Infineon Technologies TLE4275GNTMA1

Overview

TLE4275GNTMA1 from Infineon Technologies is a monolithic 5-V low-drop fixed linear voltage regulator in PG-TO263-5-1 package, delivering up to 450 mA output current with ±2% output voltage accuracy (4.9–5.1 V), 250–500 mV dropout at 300 mA, and integrated power-on/undervoltage reset with programmable delay. It operates from 5.5 V to 42 V input and is AEC-Q100 qualified for automotive power supply rails.

For engineers reviewing the TLE4275GNTMA1 datasheet, TLE4275GNTMA1 pinout, TLE4275GNTMA1 application, or TLE4275GNTMA1 equivalent, key selection criteria include reset threshold (4.65 V typ), reset delay programmability via external capacitor, reverse polarity protection, short-circuit proof operation, and thermal shutdown behavior at 150 °C junction temperature.

Technical Context

The TLE4275GNTMA1 uses a bandgap reference and control amplifier to regulate output voltage by driving a series pass transistor with saturation control, preventing oversaturation under load. Its internal protection circuits include overtemperature shutdown (150 °C), reverse polarity blocking, and short-circuit current limiting.

Reset generation is independent of input voltage down to VQ = 1 V and features an open-collector RO output with 0.2–0.4 V low-level voltage. Delay timing is set externally via capacitor on Pin 4 (D), yielding 10–22 ms typical delay with 47 nF.

Key Specifications

Pinout & Package

Package: PG-TO263-5-1 (RoHS-compliant D²PAK), thermally enhanced with Pin 3 internally connected to heatsink.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5-V automotive LDO regulator applications.

Compared with TLV73350PDBVR and NCP1117ST50T3G, the TLE4275GNTMA1 uniquely integrates AEC-Q100 qualification, programmable reset, reverse polarity protection, and short-circuit survival-making it the only drop-in solution for ASIL-B–aligned automotive power domains requiring functional safety-aware supervision.

Availability

TLE4275GNTMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and ADAS camera modules requiring stable component supply, long-term automotive lifecycle support, and RoHS-compliant sourcing.

Supply support for TLE4275GNTMA1 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 R&D and manufacturing infrastructure.

The TLE4275GNTMA1 belongs to Infineon's TLE automotive linear regulator product line, designed specifically for demanding 12 V/24 V vehicle electrical systems requiring high reliability, integrated supervision, and extended temperature operation.

FAQ

What is the minimum input voltage required for regulation?

The TLE4275GNTMA1 requires a minimum input voltage of 5.5 V to maintain 5 V output regulation. Below this, output voltage drops linearly with input; regulation resumes once VI exceeds VQ + Vdr (e.g., >5.25 V at light load). This threshold ensures stable startup during cold-crank conditions in 12 V automotive systems.

How is the reset delay time calculated?

Reset delay trd is determined by the capacitor value on Pin 4 (D) and internal charging current ID,c (3.0–9.0 µA). With CD = 47 nF, trd = CD × VDU / ID,c yields 10–22 ms typical. For precise timing, measure ID,c per unit or use 100 nF for ~20–50 ms delay in production validation.

Can the RO pin drive an LED directly?

Yes-the RO pin is an open-collector output rated for 5 mA sink current and 25 V max voltage. With a 1 kΩ pull-up to 5 V, it can drive a standard LED (2 mA forward current, ~1.8 V VF) while maintaining <0.4 V low-level voltage. Ensure total sink current stays within 5 mA absolute maximum rating.

Is thermal derating required on a standard FR4 PCB?

Yes-on a standard 80 × 80 × 1.5 mm FR4 PCB with 300 mm² copper area, Rthj-a is 53 K/W for PG-TO263-5-1. At 450 mA and 40 V input, power dissipation reaches ~15.8 W, raising junction temperature by ~840 °C above ambient-exceeding 150 °C. Derate output current to ≤200 mA or add heatsink to stay within thermal limits.