Infineon Technologies TLE4275DATMA1

Overview

TLE4275DATMA1 from Infineon Technologies is a monolithic 5-V low-drop fixed linear voltage regulator in PG-TO220-5-11 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 body control modules.

For engineers reviewing the TLE4275DATMA1 datasheet, TLE4275DATMA1 pinout, TLE4275DATMA1 application, or TLE4275DATMA1 equivalent, key selection criteria include its 450 mA load capability, reset threshold of 4.65 V (typ.), 16 ms typical delay with 47 nF capacitor, reverse-polarity protection, and thermal shutdown behavior at 150 °C junction temperature.

Technical Context

The TLE4275DATMA1 uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to maintain regulation across wide load and input voltage ranges. Its internal reset generator monitors output voltage via a precision comparator and triggers an open-collector RO signal when VQ falls below 4.65 V (typ.) - active down to VQ = 1 V.

Reset delay is externally set by capacitor CD connected between pin 4 (D) and GND, producing 10–22 ms delay (16 ms typ. at 47 nF). Thermal protection disables the output above 150 °C junction temperature, and short-circuit current limiting holds IQ ≤ 700 mA during fault conditions.

Key Specifications

Pinout & Package

PG-TO220-5-11 package: 5-pin through-hole, thermally enhanced with pin 3 internally connected to heatsink tab. Pin 1 (I) accepts 5.5–42 V input; pin 5 (Q) delivers regulated 5 V; pin 2 (RO) provides open-collector reset signal; pin 4 (D) sets delay time; pin 3 (GND) serves as ground and thermal path.

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 TLE4275DATMA1 uniquely integrates automotive-grade reset, reverse-polarity tolerance, and thermal shutdown in a single AEC-Q100-qualified device - eliminating three discrete components in BCM and ECU power trees.

Availability

TLE4275DATMA1 is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, instrument clusters, and ADAS camera modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for TLE4275DATMA1 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 belongs to Infineon's TLE automotive linear regulator family, designed specifically for robust, integrated power supply and reset functions in safety-critical vehicle subsystems operating across extended temperature and voltage ranges.

FAQ

What is the minimum input voltage required for regulation at full 450 mA load?

The TLE4275DATMA1 maintains regulation down to 5.5 V input voltage at full 450 mA load, enabled by its low-drop architecture (250–500 mV dropout). Below 5.5 V, output voltage collapses linearly; the device does not regulate but remains functional until VI drops below 1 V.

How is the reset delay time calculated and what capacitor value yields 20 ms?

Reset delay trd is determined by the RC time constant formed by the internal 5.5 µA charging current (ID,c) and external capacitor CD: trd ≈ CD × 1.8 V / 5.5 µA. For 20 ms, CD ≈ 61 nF - standard 68 nF gives ~22 ms, matching the datasheet's maximum value.

Can the RO pin drive an LED directly without a current-limiting resistor?

No - the RO pin is an open-collector NPN output rated for 5 mA sink current. Driving an LED directly risks exceeding IRO limit and damaging the internal transistor. A series resistor (e.g., 1 kΩ to 5 V) is mandatory to limit current to ≤5 mA and ensure reliable reset signaling.

Is the PG-TO220-5-11 package compatible with standard TO-220 heatsinks?

Yes - the PG-TO220-5-11 has identical mechanical footprint and mounting hole spacing as standard TO-220 packages. Pin 3 is electrically and thermally connected to the metal tab, enabling direct thermal coupling to standard insulating or non-insulating heatsinks using M3 screws and thermal compound.