Infineon Technologies TLE4270DNTMA1

Overview

TLE4270DNTMA1 from Infineon Technologies is a 5-V fixed-output, low-dropout linear voltage regulator with integrated reset generator, reverse polarity protection, and overvoltage/overtemperature/short-circuit protection. It delivers up to 650 mA output current at ≤2% output voltage tolerance (4.90–5.10 V), supports input voltages up to 42 V (65 V transient ≤400 ms), and operates across –40 °C to +150 °C junction temperature - used in automotive body control modules for stable 5-V supply to microcontrollers and sensors.

For engineers reviewing the TLE4270DNTMA1 datasheet, TLE4270DNTMA1 pinout, TLE4270DNTMA1 application, or TLE4270DNTMA1 equivalent, key selection criteria include its adjustable power-on reset delay (via external capacitor), 350–700 mV dropout at 550 mA, integrated 30 kΩ pull-up on RO, and TO-252-5-1 (DPAK) package thermal performance (R_thj-a = 79 K/W).

Technical Context

The TLE4270DNTMA1 uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to maintain regulation under varying load and input conditions. Its internal protection circuits independently monitor input voltage (OV at 42–46 V), junction temperature (>150 °C shutdown), output short-circuit (current-limited to 650–850 mA), and reverse polarity (blocking down to –42 V).

The reset generator compares output voltage against a 4.5–4.8 V threshold and produces an open-collector RO signal; delay time is set by capacitor on pin D (e.g., 13 ms with 100 nF), while internal 30 kΩ pull-up ensures defined logic-high state when Q ≥ 4.5 V.

Key Specifications

Pinout & Package

Package: TO-252-5-1 (DPAK), surface-mount, thermally enhanced with exposed drain pad connected internally to GND and heatsink.

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 TLE4270DNTMA1 uniquely integrates reset delay adjustment, reverse polarity blocking, and 65-V transient tolerance - eliminating four external components in automotive body electronics designs.

Availability

TLE4270DNTMA1 is available at Aetrix Electronics and suitable for automotive body control modules, engine management sensor supplies, and infotainment subsystems requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for TLE4270DNTMA1 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 global manufacturing and AEC-Q100 qualified product lines.

The TLE4270 series belongs to Infineon's automotive linear regulator product line, designed specifically for robust 5-V power delivery in harsh vehicle environments - emphasizing protection integration, wide input range, and extended temperature operation.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE4270DNTMA1 supports continuous input voltages from 6 V to 42 V. It tolerates up to 65 V for transients lasting ≤400 ms, after which overvoltage protection disables the output until input drops below 36 V. This capability eliminates the need for external TVS diodes in standard automotive load-dump scenarios.

How is the reset delay time configured, and what capacitor value yields 100 ms?

Reset delay is set by connecting a capacitor between pin D and GND. The internal current source charges this capacitor; 100 ms delay requires ≈750 nF (calculated from typical charge current of 14 µA and threshold of 1.8 V). Values must be selected within 10 nF–1 µF range for stable operation.

Does the RO pin require an external pull-up resistor?

No. Pin RO is an open-collector output with an internal 30 kΩ pull-up resistor connected to the Q (5-V) output. An external pull-up is unnecessary unless interfacing with higher-voltage logic (e.g., 12-V systems), in which case a level-shifting circuit is required instead.

Can TLE4270DNTMA1 replace TLE4271-2 without redesign?

No. While both are Infineon automotive LDOs, TLE4271-2 has different pinout (RO and D swapped), higher dropout, and no reverse polarity protection. Direct replacement would cause incorrect reset behavior and potential damage during reverse battery connection - PCB layout and schematic changes are mandatory.