Infineon Technologies TLE4276DV50NTMA1

Overview

TLE4276DV50NTMA1 from Infineon Technologies is a fixed 5 V low-dropout linear voltage regulator in PG-TO252-5-11 (D-Pak) package, delivering up to 400 mA output current with ≤ ±4% output voltage tolerance, 250–500 mV dropout at 250 mA, and inhibit-controlled shutdown (<10 µA quiescent current). It is AEC-Q100 qualified and RoHS-compliant for automotive power supply rails.

For engineers reviewing the TLE4276DV50NTMA1 datasheet, TLE4276DV50NTMA1 pinout, TLE4276DV50NTMA1 application, or TLE4276DV50NTMA1 equivalent, key selection criteria include its 5 V fixed output, automotive-grade thermal protection (150 °C max junction), reverse-polarity and short-circuit robustness, and compatibility with ≥22 µF/≤3 Ω ESR output capacitors in engine control and body electronics.

Technical Context

The TLE4276DV50NTMA1 uses a bipolar series pass transistor with saturation control to prevent oversaturation under load, enabling stable regulation across -40 °C to +150 °C. Its internal bandgap reference and control amplifier maintain output accuracy despite input line variations (12–32 V ΔVI yields only 15–25 mV ΔVQ).

Protection circuitry includes thermal shutdown, reverse-polarity immunity (−42 V tolerant), and short-circuit current limiting (400–1100 mA trip range). The inhibit input is low-active, pulling total current consumption below 10 µA when asserted - critical for battery-sensitive automotive sleep modes.

Key Specifications

Pinout & Package

Package: PG-TO252-5-11 (D-Pak), surface-mount, thermally enhanced with exposed drain pad connected to GND for PCB heat sinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and NCP1117ST50T3G, the TLE4276DV50NTMA1 uniquely combines AEC-Q100 Grade 0 qualification, integrated reverse-polarity protection, inhibit control, and automotive-grade thermal shutdown - making it the sole drop-in solution for safety-critical 5 V rails in ECU and BCM applications.

Availability

TLE4276DV50NTMA1 is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for TLE4276DV50NTMA1 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, and industrial control ICs, with global manufacturing and automotive qualification infrastructure.

The TLE4276 product line delivers AEC-Q100-qualified linear regulators optimized for harsh automotive environments - designed specifically for reliable 5 V, 8.5 V, and 10 V supply rails in ECUs, sensors, and infotainment systems.

FAQ

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

The TLE4276DV50NTMA1 requires VI ≥ VQ + 0.5 V = 5.5 V to maintain regulation at 400 mA. At 250 mA, typical dropout is 250 mV, so 5.25 V input suffices. Below 5.5 V, output collapses linearly per dropout curve in Figure 9 of Rev. 2.7 datasheet.

Can the INH pin be left unconnected, or does it require a pull-up resistor?

The INH pin must not be left floating. It is low-active and internally pulled up; however, a 10 kΩ pull-up to V_I is recommended to ensure reliable enablement during power-up transients and prevent unintended shutdown due to noise coupling.

Is an external voltage divider required for the TLE4276DV50NTMA1?

No. The "DV50" suffix denotes the fixed 5 V output version. Pin 4 (N.C.) is not connected internally - unlike the "V" (adjustable) variants which require VA pin and external resistor network. No external components are needed to set output voltage.

What is the recommended PCB layout for thermal performance in PG-TO252-5-11 package?

Maximize copper area under the exposed drain pad (pins 1, 3, 5 thermal pad) tied directly to a solid GND plane. Use ≥4 thermal vias (0.3 mm diameter) connecting pad to inner/ground layers. Keep input/output capacitors within 5 mm of respective pins to minimize loop inductance and ensure stability.