Infineon Technologies TLE4251DATMA1

Overview

TLE4251DATMA1 from Infineon Technologies is an automotive-qualified monolithic low-drop voltage tracker IC that regulates output voltage to match an external reference (e.g., 5 V main regulator) with ±0.2% accuracy at ≤300 mA load, supports up to 40 V input, delivers 400 mA max output current, and features enable-controlled standby mode with ≤2 µA quiescent current - used for sensor power supply in engine control units and ADAS domain controllers.

For engineers reviewing the TLE4251DATMA1 datasheet, TLE4251DATMA1 pinout, TLE4251DATMA1 application, or TLE4251DATMA1 equivalent, key selection criteria include tracking tolerance under wide temperature (-40 °C to 150 °C), short-circuit/overtemperature/reverse-polarity protection, PG-TO252-5 package thermal resistance (R_thJC = 4 K/W), and EN-input logic thresholds (V_{EN_ON} ≥ 2 V, V_{EN_OFF} ≤ 0.5 V).

Technical Context

The TLE4251 operates as a precision voltage follower: its output Q tracks the voltage applied to ADJ via resistor divider or direct connection, enabling proportional regulation (e.g., 3.3 V from 5 V reference). Internal saturation control and protection circuitry actively limit current during overload and disable output during overtemperature or reverse polarity events.

It functions within a functional input range of 4 V to 40 V (VI > VADJ + V_DR), supports adjust input voltages from 0 V to 40 V, and maintains stable regulation across junction temperatures from -40 °C to 150 °C per AEC-Q100 qualification. Drop voltage is 280–520 mV at 300 mA with VADJ > 4 V.

Key Specifications

Pinout & Package

Package: PG-TO252-5 (D-Pak variant with exposed thermal pad), RoHS-compliant green product.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71733PDBVR and MAX1725EUT+T, the TLE4251DATMA1 uniquely combines AEC-Q100 qualification, ±0.2% tracking accuracy, 400 mA output, and full fault protection in a thermally optimized PG-TO252-5 package - making it the only drop-in solution for safety-critical automotive sensor tracking.

Availability

TLE4251DATMA1 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, transmission control modules, and body control modules requiring stable component supply across automotive production lifecycles.

Supply support for TLE4251DATMA1 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 manufacturing and automotive qualification infrastructure.

The TLE4251 belongs to Infineon's OPTIREG™ linear regulator family, designed specifically for high-precision, high-reliability power tracking in automotive electronic control units under extreme electrical and thermal stress.

FAQ

What is the minimum input voltage required for regulation?

The TLE4251DATMA1 requires VI > VADJ + V_DR, where V_DR is 280–520 mV. With VADJ = 5 V, minimum VI is 5.28 V. At light loads (<1 mA), regulation holds down to VI = 4 V per functional range specification, but output accuracy degrades beyond ±25 mV.

Can the ADJ pin be connected directly to a 5 V reference without a resistor divider?

Yes - the ADJ pin accepts direct connection to a stable 2.5–40 V reference. Input bias current is ≤0.5 µA, so no loading error occurs. For output voltages below the reference (e.g., 3.3 V from 5 V), use a resistor divider with top resistor ≤100 kΩ to limit error from I_ADJ.

Is an output capacitor mandatory, and what are its critical parameters?

Yes - a minimum 22 µF capacitor with ESR ≤3 Ω at 10 kHz is required on the Q pin for stability and transient response. Tantalum or low-ESR ceramic capacitors meet this; aluminum electrolytics are not recommended due to higher ESR and aging effects.

Does the TLE4251DATMA1 support parallel operation for higher current?

No - the TLE4251DATMA1 is not designed for parallel operation. Its tracking architecture relies on single-point ADJ reference sensing; paralleling causes current imbalance and potential oscillation. For >400 mA, select Infineon's TLE4275 or use external current-sharing circuitry.