Infineon Technologies TLE4264-2G

Overview

TLE4264-2G from Infineon Technologies is a monolithic 5 V low-drop fixed linear voltage regulator in PG-SOT223-4 package, delivering up to 150 mA output current with ±3% output voltage tolerance (±2% up to 50 mA), 40 µA quiescent current, and operation from 5.5 V to 45 V input across −40°C to 150°C junction temperature - designed for microprocessor power supply in automotive ECUs.

For engineers reviewing the TLE4264-2G datasheet, TLE4264-2G pinout, TLE4264-2G application, or TLE4264-2G equivalent, key selection criteria include automotive AEC-Q100 qualification, reverse-polarity protection, SOA-limited current at high input voltage, thermal shutdown behavior, and required 10 µF/ESR ≤4 Ω output capacitor stability.

Technical Context

The TLE4264-2G implements a bandgap-referenced control loop comparing a divided output voltage against a 2.5 V internal reference to regulate 5 V output. Its saturation control circuit dynamically limits base drive to the series pass transistor to prevent over-saturation under load.

Protection features are integrated at silicon level: overtemperature shutdown triggers at ~170°C junction, short-circuit current limiting holds peak output at 200 mA typical, and reverse-polarity protection enables safe operation with −42 V applied to input. Input voltage range spans 5.5 V to 45 V with drop voltage as low as 0.22 V at 100 mA.

Key Specifications

Pinout & Package

Package: PG-SOT223-4 - thermally enhanced surface-mount package with exposed thermal pad (pin 4), footprint optimized for PCB heat spreading on 300 mm² copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and TLE42744G, the TLE4264-2G uniquely balances ultra-low quiescent current (40 µA), reverse-polarity robustness (−42 V), and SOA-based current limiting - making it optimal for cost-sensitive, always-on automotive modules requiring long-term battery integrity.

Availability

TLE4264-2G is available at Aetrix Electronics and suitable for body control modules, engine control units, transmission control units, and ADAS camera modules requiring stable component supply across automotive production lifecycles.

Supply support for TLE4264-2G 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 industrial control solutions, with global manufacturing and automotive qualification infrastructure.

The OPTIREG™linear product line delivers AEC-Q100-qualified linear regulators engineered specifically for harsh automotive environments - emphasizing fault resilience, thermal robustness, and long-term parametric stability.

FAQ

What is the minimum input voltage required for regulation?

The TLE4264-2G requires a minimum input voltage of 5.5 V to maintain 5 V output regulation. At 100 mA load, the drop voltage is 0.22 V, meaning the lowest functional input is 5.72 V. Below 5.5 V, the device enters dropout and output voltage falls linearly with input.

Can the TLE4264-2G replace the TLE4264 without design changes?

Yes - the TLE4264-2G is pin-compatible and functionally compatible with the TLE4264, differing only in reduced quiescent current (40 µA vs. 70 µA typ.) and tighter output tolerance at light loads. No PCB or schematic changes are needed for drop-in replacement.

Is an input capacitor mandatory, and what value is recommended?

Yes, a 100 nF ceramic capacitor is mandatory between input and GND, placed as close as possible to pins 1 and 2. This suppresses high-frequency noise and prevents oscillation due to PCB trace inductance. For long supply lines (>1 m), add a 470 µF electrolytic capacitor upstream.

How does the SOA protection behave above 25 V input?

Above 25 V input, the TLE4264-2G reduces maximum output current to prevent thermal runaway - e.g., at 40 V input, current limit drops to ~80 mA. This is implemented via internal sensing and does not require external components or configuration.