Infineon Technologies TLE4675GATMA1

Overview

TLE4675GATMA1 from Infineon Technologies is a monolithic automotive-grade LDO linear voltage regulator delivering a fixed 5 V ±2% output at up to 400 mA, featuring integrated reset functionality with programmable delay, reverse polarity protection, short-circuit and overtemperature shutdown, and operation across −40 °C to +150 °C junction temperature - designed for microcontroller power supply in engine control units (ECUs) and body electronics.

For engineers reviewing the TLE4675GATMA1 datasheet, TLE4675GATMA1 pinout, TLE4675GATMA1 application, or TLE4675GATMA1 equivalent, key selection criteria include its 45 V max input rating, ultra-low dropout voltage, reset output active down to V_Q = 1 V, line transient robustness, and AEC-Q100 qualification for under-hood automotive use.

Technical Context

The TLE4675GATMA1 integrates a bandgap reference, error amplifier, pass transistor, and protection circuitry into a single die. Its reset function monitors regulated output voltage (V_Q) and asserts an open-drain active-low signal (RO) when V_Q falls below threshold, with delay timing set externally via capacitor on pin D.

It operates across a functional input range of 3.3 V to 45 V, supports transient immunity up to ±20 V/µs, and maintains regulation with dropout voltage as low as 0.35 V at 400 mA - enabling stable 5 V supply even during cold-crank conditions where battery voltage dips to ~3.3 V.

Key Specifications

Pinout & Package

Package: PG-TO263-5 (D²PAK), thermally enhanced surface-mount package with exposed cooling tab electrically connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV70750PDBVR and MAX16910ATA/V+T, the TLE4675GATMA1 uniquely combines 45 V input tolerance, reverse polarity hardening, and AEC-Q100 Grade 0 qualification - making it the only option among the three validated for direct battery connection in high-temperature engine bay locations.

Availability

TLE4675GATMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and electric power steering controllers requiring stable component supply across automotive production lifecycles.

Supply support for TLE4675GATMA1 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 AEC-Q100 validation infrastructure.

The TLE4675 belongs to Infineon's automotive power regulator product line, engineered specifically for robust, single-chip 5 V supply and reset generation in safety-critical vehicle control systems.

FAQ

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

The TLE4675GATMA1 maintains 5 V regulation down to an input voltage of V_Q + V_dr, where V_dr is the dropout voltage. At 400 mA, typical dropout is 0.35 V, so minimum input is 5.35 V. However, functional operation begins at 3.3 V input - below this, regulation is lost but the device remains undamaged and resumes regulation once input rises above dropout threshold.

Can the reset delay time be adjusted, and how is it calculated?

Yes, reset delay is set by an external capacitor connected between pin D and GND. The delay t_delay ≈ 1.1 × R_int × C_D, where R_int is an internal 1.2 MΩ resistor (typ.). For example, a 100 nF capacitor yields ~132 ms delay. This timing ensures MCU reset holds until V_Q stabilizes post-power-up or post-transient.

Is an external pull-up resistor required on the RO pin, and what value is recommended?

Yes - RO is an open-drain output and requires an external pull-up to a valid logic-high voltage (e.g., 5 V or 3.3 V). A 10 kΩ resistor is recommended: low enough to ensure fast rise time and noise immunity, high enough to limit current during reset assertion (max sink current is 5 mA). No pull-up is needed if reset functionality is unused and RO is left floating.

Does the TLE4675GATMA1 require a specific type or value of output capacitor for stability?

Yes - the datasheet specifies a minimum 22 µF output capacitance with ESR ≤2.5 Ω at 10 kHz. Ceramic capacitors meeting these specs (e.g., X7R 22 µF/16 V) are preferred for low ESR and reliability. Tantalum or aluminum electrolytic caps may be used only if their ESR falls within the specified range and lifetime is verified for 150 °C ambient operation.