Infineon Technologies TLE4276GV10

Overview

TLE4276GV10 from Infineon Technologies is a fixed-output 10 V low-dropout linear voltage regulator in PG-TO263-5-1 package, delivering up to 400 mA output current with ±4% output voltage tolerance and dropout voltage as low as 250 mV at 250 mA load. It features an active-low inhibit input, reverse-polarity protection, short-circuit proofing, and AEC-Q100 qualification for automotive power supply rails.

For engineers reviewing the TLE4276GV10 datasheet, TLE4276GV10 pinout, TLE4276GV10 application, or TLE4276GV10 equivalent, this regulator supports critical 10 V rail generation in engine control units, body electronics modules, and ADAS sensor power domains where thermal robustness, low quiescent current (<10 µA in inhibit mode), and high ESD immunity (2 kV HBM) are required.

Technical Context

The TLE4276GV10 integrates a bandgap reference, error amplifier, saturation-controlled series pass transistor, and comprehensive protection circuitry including thermal shutdown, overload limiting, and reverse-polarity detection. Its control loop maintains regulation across input voltages from 11 V to 40 V while sustaining stability with ≥22 µF output capacitance and ≤3 Ω ESR.

Pin 4 is internally unconnected (N.C.) in fixed-output versions like GV10 - unlike the adjustable variant where it serves as voltage adjust (VA) input. The inhibit function reduces total current consumption to <10 µA when pulled low, enabling low-power sleep states in automotive microcontroller subsystems.

Key Specifications

Pinout & Package

Package: PG-TO263-5-1 (D²PAK), surface-mount, thermally enhanced with exposed drain pad connected to GND for heatsinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1117-10IDCYR and NCP1117ST10T3G, the TLE4276GV10 uniquely combines AEC-Q100 Grade 1 qualification, integrated inhibit control, reverse-polarity survivability, and automotive-grade ESD robustness - making it the only choice for safety-critical 10 V rail generation in harsh-temperature engine bay environments.

Availability

TLE4276GV10 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera systems requiring stable component supply with full automotive qualification and long-term lifecycle support.

Supply support for TLE4276GV10 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 TLE4276 series belongs to Infineon's automotive linear regulator product line, designed specifically for robust, low-noise, and fail-safe power supply in engine, chassis, and driver assistance systems.

FAQ

What is the minimum input voltage required for regulation at 10 V output?

The TLE4276GV10 requires a minimum input voltage of 11 V to maintain regulation - defined as V_Q + 0.5 V per datasheet Table 4. Below this, output voltage drops linearly with input; operation below 11 V is permissible but unregulated, and dropout increases significantly below 10.5 V.

Can Pin 4 (N.C.) be left floating or must it be grounded?

Pin 4 is internally unconnected in the GV10 variant and must remain unconnected - neither grounded nor tied to any voltage. Connecting it risks internal node interference or undefined behavior. The datasheet explicitly prohibits external connection for fixed-output versions.

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

Yes, an input capacitor is mandatory for stability and noise suppression. A ceramic capacitor of ≥100 nF placed directly at Pin 1 (I) is required. For transient suppression, a bulk electrolytic (e.g., 10 µF) may be added in parallel, but the 100 nF ceramic must be closest to the IC pin per layout guidelines.

Does the TLE4276GV10 require a heatsink for 400 mA continuous operation?

Yes - at 400 mA and ambient temperatures above 70°C, the PG-TO263-5-1 package's 80 K/W R_th(j-a) will exceed the 150°C maximum junction temperature without heatsinking. A copper pour ≥80 mm × 80 mm (35 µm Cu) is the minimum recommended PCB heatsink; forced airflow or metal-core PCB improves margin.