Infineon Technologies TLE4276GV50ATMA1

Overview

TLE4276GV50ATMA1 from Infineon Technologies is a monolithic high-accuracy linear voltage regulator delivering 5.0 V ±2% output at up to 400 mA, featuring integrated short-circuit and thermal shutdown protection, reverse-battery polarity protection, and adjustable reset delay via external capacitor - deployed in automotive body control modules for ECU power rail stabilization.

For engineers reviewing the TLE4276GV50ATMA1 datasheet, TLE4276GV50ATMA1 pinout, TLE4276GV50ATMA1 application, or TLE4276GV50ATMA1 equivalent, key selection criteria include dropout voltage (≤0.5 V at 400 mA), load regulation (±0.5%), and AEC-Q100 Grade 1 qualification for under-hood operation.

Technical Context

This device operates as a fixed-output linear regulator with internal bandgap reference, error amplifier, and Darlington pass transistor. It supports input voltages from 5.5 V to 40 V and maintains regulation down to 4.5 V input during cold-crank conditions.

Reset functionality is triggered by undervoltage detection on the regulated output, with delay time set by an external capacitor (e.g., 100 nF yields ~100 ms delay). The IC integrates active current limiting and foldback behavior during overload.

Key Specifications

Pinout & Package

Supplied in TO263-5-1 (D²PAK) surface-mount package with exposed thermal pad for enhanced heat dissipation in high-ambient automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and TPS7B6950QDCYRQ1, the TLE4276GV50ATMA1 uniquely combines 400 mA capability, −40 V reverse-battery robustness, and user-programmable reset timing - making it the sole choice for cost-sensitive, thermally demanding automotive body electronics where functional safety and cold-crank resilience are mandatory.

Availability

TLE4276GV50ATMA1 is available at Aetrix Electronics and suitable for body control modules, door control units, seat control systems, and roof modules requiring stable component supply across automotive production lifecycles.

Supply support for TLE4276GV50ATMA1 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 wafer fabrication infrastructure.

The TLE4276 series belongs to Infineon's automotive linear regulator product line, engineered specifically for robust, low-noise 5 V supply generation in body electronics and comfort systems operating under harsh vehicle electrical conditions.

FAQ

What is the minimum input voltage required for regulation at full 400 mA load?

The TLE4276GV50ATMA1 maintains 5.0 V regulation down to 5.5 V input at 400 mA, with dropout voltage ≤0.5 V. Below 5.5 V, output collapses linearly; cold-crank operation is supported only when input remains ≥4.5 V, though regulation is lost below 5.5 V.

How is the reset delay time calculated from the external capacitor value?

Reset delay t_DELAY ≈ 1.1 × R_INT × C_DELAY, where R_INT = 1.1 MΩ (internal resistor). For example, a 100 nF capacitor yields ~121 ms delay. Values between 10 nF (11 ms) and 1 µF (1.2 s) are supported per datasheet Figure 12.

Does the ADJ/SENSE pin require a pull-up or pull-down resistor?

No external resistor is required on the ADJ/SENSE pin. It functions as a high-impedance node for capacitor connection and internal voltage sensing. Connecting it directly to GND disables reset; leaving it open is invalid - always connect to C_DELAY or GND per application requirements.

Can this regulator be paralleled for higher output current?

Paralleling is not supported. The device lacks current-sharing features such as remote sensing or master-slave enable. Attempting parallel operation risks thermal imbalance and premature failure due to mismatched dropout and thermal resistance in TO263-5-1 packages.