Infineon Technologies TLE4275DV33ATMA1

Overview

TLE4275DV33ATMA1 from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering a fixed 3.3 V ±2 % output at up to 400 mA, featuring integrated reset generation 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 automotive body control modules.

For engineers reviewing the TLE4275DV33ATMA1 datasheet, TLE4275DV33ATMA1 pinout, TLE4275DV33ATMA1 application, or TLE4275DV33ATMA1 equivalent, key selection criteria include input voltage range (-42 V to +45 V), ceramic capacitor stability (≥22 µF, ESR ≤3 Ω), open-collector reset output (RO) with active-low behavior down to VQ = 1 V, and PG-TO252-5-11 package thermal resistance (R_th,j-c = 1.8 K/W).

Technical Context

The device integrates a PNP pass transistor controlled by a bandgap-referenced feedback loop, with stability conditioned on output capacitance (22 µF min) and ESR (≤3 Ω). Protection circuitry includes current limiting that reduces max output current above VI = 22 V, thermal shutdown activating at T_j,sd = 151–200 °C with 25 K hysteresis, and reverse-polarity tolerance enabling safe operation at VI = -42 V.

The reset function operates independently of input supply: RO remains active low down to VQ = 1 V, powered from the output capacitor; delay timing is set via external capacitor CD on pin D, with power-on delay defined as t_d,PWR-ON = F_d,PWR-ON × C_D (F_d,PWR-ON = 1.2 s/µF typ), and undervoltage delay as t_d = F_d × C_D (F_d = 0.4 s/µF typ).

Key Specifications

Pinout & Package

Package: PG-TO252-5-11 (RoHS-compliant, surface-mount, exposed thermal pad connected to GND). Thermal resistance: R_th,j-c = 1.8 K/W, R_th,j-a = 144 K/W (footprint only), 78 K/W (300 mm² heatsink), 55 K/W (600 mm² heatsink).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear regulator with reset applications.

Compared with TLV70733PDQNR and MAX16150ATA+T, TLE4275DV33ATMA1 uniquely combines automotive-grade input voltage resilience (-42 V to +45 V), integrated reset with programmable delay, reverse polarity protection, and ceramic-capacitor stability in one PG-TO252-5-11 package - making it optimal for cost-sensitive, space-constrained BCM and ECU designs requiring AEC-Q100 compliance.

Availability

TLE4275DV33ATMA1 is available at Aetrix Electronics and suitable for body control modules, engine control unit subsystems, and ADAS camera ECUs requiring stable component supply across automotive production lifecycles.

Supply support for TLE4275DV33ATMA1 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 qualification infrastructure aligned to IATF 16949.

The TLE4275 series belongs to Infineon's automotive linear regulator product line, engineered specifically for robust, integrated power supply and supervision in harsh-temperature, high-reliability vehicle subsystems - emphasizing fault resilience, AEC-Q100 compliance, and system-level integration.

FAQ

What is the minimum output capacitance required for stable operation?

The TLE4275DV33ATMA1 requires a minimum 22 µF ceramic output capacitor with ESR ≤3 Ω, verified across -40 °C to +150 °C and 1 mA–400 mA load range. This value accounts for worst-case ±30 % capacitance tolerance and ensures phase margin >45° under all operating conditions per datasheet Figure 12 and Table "Functional Range".

Can the reset function operate when the input voltage is disconnected?

Yes - the reset circuit is powered from the output capacitor (pin Q), allowing RO to remain active low down to VQ = 1 V even when VI = 0 V. This ensures reliable microcontroller reset during battery disconnection or severe input undervoltage events, as confirmed in Section 3.3 and Figure 4 of Rev. 1.2 datasheet.

Is an input capacitor mandatory, and what value is recommended?

An input capacitor is strongly recommended: a 10 µF–100 µF X7R ceramic capacitor placed directly between pins I and GND suppresses line transients and stabilizes regulation during load dump (ISO 7637-2 Pulse 5a). While not strictly mandatory for basic functionality, omission risks instability and premature thermal shutdown under high-dV/dt conditions.

Does the device support adjustable output voltage via external resistors?

No - TLE4275DV33ATMA1 is a fixed-output regulator with internal feedback divider setting VQ = 3.3 V ±2 %. It does not provide feedback (FB) or adjust (ADJ) pins; output voltage cannot be modified. For adjustable variants, Infineon offers the TLE4274 series with external resistor programming.