Infineon Technologies TLE4275DNTMA1

Overview

TLE4275DNTMA1 from Infineon Technologies is a monolithic 5-V low-drop fixed linear voltage regulator in PG-TO252-5-11 package, delivering up to 450 mA output current with ±2% output accuracy, 250–500 mV dropout at 300 mA, and integrated power-on/undervoltage reset (V_Q,rt = 4.65 V typ). It is AEC-Q100 qualified and designed for automotive body control modules requiring stable 5-V supply under harsh input conditions (VI = 5.5–42 V).

For engineers reviewing the TLE4275DNTMA1 datasheet, TLE4275DNTMA1 pinout, TLE4275DNTMA1 application, or TLE4275DNTMA1 equivalent, key selection criteria include reset delay programmability via external capacitor, reverse-polarity protection, short-circuit proof operation, thermal shutdown behavior, and ESD robustness (>4 kV) in automotive-grade packaging.

Technical Context

The TLE4275DNTMA1 uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to prevent oversaturation across load currents up to 450 mA. Its internal reset generator triggers at V_Q,rt = 4.65 V (±150 mV), with delay time set by an external capacitor on Pin 4 (D), yielding 10–22 ms typical delay for C_D = 47 nF.

Protection circuits include overtemperature shutdown (T_j > 150 °C), reverse-polarity tolerance (VI down to –42 V), and short-circuit current limiting. The open-collector reset output (Pin 2, RO) sinks up to 5 mA and remains functional down to V_Q = 1 V, enabling reliable system initialization in brown-out conditions.

Key Specifications

Pinout & Package

Package: PG-TO252-5-11 (RoHS-compliant, surface-mount, exposed thermal pad connected to Pin 3/GND).

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 TPS7B6950QDCYRQ1, the TLE4275DNTMA1 uniquely combines reverse-polarity tolerance, capacitor-programmable reset delay, and open-collector RO output-enabling robust, sequenced power-up in battery-connected automotive modules where fault resilience and timing control are co-dependent.

Availability

TLE4275DNTMA1 is available at Aetrix Electronics and suitable for automotive body control modules, engine management subsystems, ADAS camera ECUs, and infotainment power trees requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.

Supply support for TLE4275DNTMA1 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 leadership in AEC-Q100-qualified analog and mixed-signal solutions.

The TLE4275 belongs to Infineon's TLE automotive linear regulator product line, engineered specifically for battery-connected 12-V/24-V vehicle subsystems demanding high fault tolerance, extended temperature operation, and integrated system-level supervision features.

FAQ

What is the minimum input voltage required for regulation?

The TLE4275DNTMA1 requires a minimum input voltage of 5.5 V to maintain 5.0 V output regulation, due to its dropout specification (250–500 mV at 300 mA). Below this threshold, output voltage collapses linearly with input, and the reset output (RO) asserts low to signal undervoltage condition.

How is the reset delay time calculated for a custom capacitor value?

Reset delay time t_rd is determined by t_rd ≈ C_D × V_DU / I_D,c, where V_DU = 1.8 V (typ) is the upper timing threshold and I_D,c = 5.5 µA (typ) is the internal charging current. For C_D = 100 nF, t_rd ≈ 33 ms (within 10–22 ms range only for C_D = 47 nF per datasheet test condition).

Can the RO pin drive a 3.3-V logic input directly?

Yes-the RO pin is an open-collector NPN output rated for 5 mA sink current and specified to pull below 0.4 V when active. With a 3.3-V pull-up resistor (e.g., 10 kΩ), it delivers valid LOW logic to 3.3-V CMOS inputs without level-shifting circuitry.

Is thermal derating required when using the PG-TO252-5-11 package on standard FR4?

Yes-R_thj-a = 78 K/W for PG-TO252-5-11 on FR4 (80 × 80 × 1.5 mm). At 450 mA and 42 V input, power dissipation reaches ~16.7 W, implying ∆T = 1300 °C above ambient-physically impossible. Derating is mandatory: max continuous load is ~250 mA at 25 °C ambient or lower loads at elevated temperatures, per thermal simulation or measured junction temp.