Infineon Technologies TLE4252DNTMA1

Overview

TLE4252DNTMA1 from Infineon Technologies is a monolithic low-dropout voltage tracking regulator in PG-TO252-5-11 (D-Pak) package, designed for automotive sensor supply under harsh conditions. It delivers 250 mA output current with ±0.2% tracking accuracy to an external reference voltage as low as 1.5 V, features enable control, reverse polarity protection, and operates from 3.5 V to 40 V input across –40 °C to 150 °C junction temperature.

For engineers reviewing the TLE4252DNTMA1 datasheet, TLE4252DNTMA1 pinout, TLE4252DNTMA1 application, or TLE4252DNTMA1 equivalent, key selection criteria include output tracking tolerance (±10 mV), quiescent current in standby (≤2 µA), short-circuit and overtemperature protection, AEC-Q100 qualification, and compatibility with 5 V main regulator references in engine control units.

Technical Context

The TLE4252DNTMA1 implements a precision error amplifier-based tracking architecture where the output Q follows the ADJ input voltage with minimal offset (±10 mV typical). Its saturation control circuit enables fast response to load transients while maintaining stability with ≥10 µF/ESR ≤5 Ω output capacitance.

It integrates dedicated protection blocks: reverse polarity proofing up to –42 V on all pins, thermal shutdown at ~170 °C, and current limiting that scales with input voltage (e.g., 350 mA typ. at VI = 13.5 V). The EN pin provides TTL-compatible logic-level control with 2.0 V turn-on threshold and internal 1.5 MΩ pull-down resistor.

Key Specifications

Pinout & Package

Package: PG-TO252-5-11 (D-Pak), thermally enhanced surface-mount package with exposed drain pad connected to Pin 3 (GND) for heatsinking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage tracking regulator applications.

Compared with TLV71715PDBVR and TPS7B8133QDDARQ1, the TLE4252DNTMA1 uniquely combines adjustable tracking, ±0.2% accuracy, reverse polarity robustness, and 250 mA drive in a single AEC-Q100 Grade 0 device-making it irreplaceable for ratiometric sensor supply in engine bay environments.

Availability

TLE4252DNTMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera modules, and electric power steering systems requiring stable component supply under automotive thermal and electrical stress.

Supply support for TLE4252DNTMA1 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 security solutions, with global R&D and manufacturing infrastructure.

The TLE family targets automotive power supply ICs-specifically engineered for robust, high-temperature, fault-tolerant regulation in engine management, chassis, and safety-critical electronic control units.

FAQ

What is the minimum required output capacitor for stable operation?

The TLE4252DNTMA1 requires a minimum 10 µF output capacitor with ESR between 0 and 5 Ω at 10 kHz. Ceramic or low-ESR tantalum capacitors meet this specification. Using smaller values or higher ESR risks output ringing and instability under load transients, especially above 100 mA step changes.

Can the ADJ pin be driven directly by a microcontroller GPIO?

No-ADJ is a high-impedance reference input (bias current 0.1–0.5 µA), not a logic input. Driving it directly from a GPIO risks violating its 1.5–40 V operating range and exceeding absolute max ratings. Use a precision voltage source or resistor divider from a stable reference (e.g., MCU's internal 2.5 V VREF+), not digital I/O.

How does the device behave during cold-crank (≤3.5 V battery)?

Below 3.5 V input, the TLE4252DNTMA1 ceases regulation and enters dropout-output Q follows input I minus drop voltage (~280 mV). It remains functional but loses tracking accuracy and current capability. No damage occurs; regulation resumes automatically once VI exceeds 3.5 V.

Is external heat sinking required for 250 mA continuous operation?

At 250 mA and 40 V input, power dissipation reaches ~9 W. With R_thj-a = 55 K/W (600 mm² heatsink), junction temperature rises ~500 °C above ambient-exceeding 150 °C limit. A heatsink area ≥1000 mm² or forced airflow is mandatory for full-load operation at high ambient temperatures.