Infineon Technologies TLE7276G

Overview

TLE7276G from Infineon Technologies is a monolithic 5 V ±2% fixed-output low-drop linear voltage regulator for automotive load currents up to 300 mA, featuring ultra-low quiescent current (20 μA typ.), inhibit control input, and operation over 5.5–42 V input range. It delivers stable 5 V output with ceramic capacitor support down to 470 nF and integrates overtemperature, short-circuit, and reverse-current protection.

For engineers reviewing the TLE7276G datasheet, TLE7276G pinout, TLE7276G application, or TLE7276G equivalent, key selection criteria include its 250 mV typical drop voltage at 200 mA, ±0.5 mV/K temperature drift, 60 dB PSRR at 100 Hz, inhibit logic thresholds (3.1 V turn-on, 0.8 V turn-off), and PG-TO263-5-1 thermal resistance of 55 K/W.

Technical Context

The TLE7276G employs an internal charge pump to enable ultra-low quiescent current while maintaining regulation across wide input (5.5–42 V) and junction temperature (−40 to +150 °C) ranges. Its bandgap reference and feedback loop are optimized for stability with minimal 470 nF ceramic output capacitance.

Protection circuitry includes thermal shutdown triggered by junction temperature ≥150 °C, current limiting (320 mA min, 800 mA max at VQ = 0 V), and integrated sink capability holding Q pin ≤5.5 V during reverse current flow - critical for battery-connected always-on systems.

Key Specifications

Pinout & Package

Package: PG-TO263-5-1 (D2-PAK), thermally enhanced surface-mount package with exposed tab connected internally to GND for heatsinking.

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 LM2931T-5.0/NOPB, the TLE7276G uniquely combines 42 V input tolerance, inhibit control, reverse-current sink, and AEC-Q100 qualification - making it the only choice for new automotive designs requiring permanent battery connection and robust fault handling.

Availability

TLE7276G is available at Aetrix Electronics and suitable for Body Control Modules, Engine Control Units, Infotainment Systems, and ADAS Camera Modules requiring stable component supply across extended automotive temperature and lifetime requirements.

Supply support for TLE7276G 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 electronics, and industrial control ICs, with global R&D and manufacturing infrastructure.

The TLE7276G belongs to Infineon's TLE automotive linear regulator family, designed specifically for harsh-environment 12 V/24 V vehicle electrical systems requiring high reliability, low quiescent current, and integrated protection.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE7276G supports continuous operation up to 42 V input, with absolute maximum rating of 45 V for short durations (<10 s). This enables use across 12 V and 24 V automotive platforms, including cold-crank (4.5 V) and load-dump (up to 42 V) conditions per ISO 7637-2.

Can the TLE7276G operate without an output capacitor?

No - the TLE7276G requires a minimum 470 nF ceramic output capacitor with ESR <3 Ω for loop stability. Omitting it causes oscillation and unregulated output. An additional 4.7–47 μF electrolytic capacitor is recommended for transient load surge suppression, especially in infotainment or ADAS applications.

How does the inhibit function behave during power-up?

The INH pin has an internal pull-down resistor, so the device remains disabled until a valid high-level signal (≥3.1 V) is applied. During V_IN ramp-up, the regulator stays off until both input voltage exceeds 5.5 V and INH rises above its turn-on threshold - preventing brown-out operation and ensuring clean power sequencing.

Is the exposed tab electrically connected, and how should it be handled on the PCB?

Yes - the exposed tab is internally connected to GND (Pin 3). It must be soldered to a dedicated thermal pad tied to a large GND copper pour (≥300 mm²) for effective heat dissipation. Do not float or isolate the tab; doing so degrades thermal performance and may trigger premature thermal shutdown at >200 mA loads.