Infineon Technologies TLE42702SAKSA1

Overview

TLE42702SAKSA1 from Infineon Technologies is a 5-V fixed-output, low-dropout linear voltage regulator in PG-TO220-5-12 package, delivering up to 650 mA output current with ±2% output voltage tolerance (4.90–5.10 V), integrated reset generator with adjustable delay, and automotive-grade protection including overvoltage (65 V/400 ms), reverse polarity, overtemperature, and short-circuit immunity. It operates across 6–42 V input range and is qualified per AEC-Q100 for engine control units and body electronics.

For engineers reviewing the TLE42702SAKSA1 datasheet, TLE42702SAKSA1 pinout, TLE42702SAKSA1 application, or TLE42702SAKSA1 equivalent, key selection criteria include its 350–700 mV dropout at 550 mA, 4.5–4.8 V reset threshold, 13 ms typical reset delay with 100 nF capacitor, and thermal shutdown at 150 °C junction temperature - all critical for robust 12 V/24 V automotive power rail design.

Technical Context

This regulator uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to maintain regulation across wide load and input conditions. Its internal reset generator monitors output voltage via a precision comparator with hysteresis and generates an open-collector reset signal (RO) pulled internally to Q through 30 kΩ.

The device implements multiple protection layers: overvoltage clamp activates at 42–46 V (with hysteresis restoring operation below 36 V), reverse-polarity blocking prevents damage during battery misconnection, and thermal foldback reduces output current above safe junction temperature - enabling reliable operation in under-hood environments.

Key Specifications

Pinout & Package

Package: PG-TO220-5-12 (thermally enhanced, isolated heatsink tab, 5-pin vertical mount).

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, TLE42702SAKSA1 uniquely combines 650 mA output, adjustable reset timing, and full ISO 7637-2 compliance - making it the only choice for high-current, thermally demanding automotive power domains requiring configurable supervision.

Availability

TLE42702SAKSA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and transmission control units requiring stable component supply with full automotive qualification and long-term lifecycle support.

Supply support for TLE42702SAKSA1 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.

TLE42702SAKSA1 belongs to Infineon's TLE family of automotive-qualified linear regulators, designed specifically for harsh-environment power supply in engine, transmission, and chassis control systems.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE42702SAKSA1 supports continuous operation up to 42 V input. It tolerates transient overvoltages up to 65 V for durations ≤400 ms, meeting ISO 7637-2 Pulse 5a requirements for automotive load-dump protection. Operation above 42 V must be strictly time-limited to avoid permanent damage.

How is the reset delay time calculated using the external capacitor on pin D?

Reset delay t_rd ≈ 0.13 × C_D, where C_D is in nanofarads and t_rd in milliseconds. For example, a 100 nF capacitor yields ~13 ms typical delay. The relationship is linear across 10–1000 nF, with upper limit constrained by leakage current and internal comparator thresholds.

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 a higher-voltage logic domain (e.g., 12 V), in which case a level-shifting circuit is required.

Can this regulator be used without the external capacitor on pin D?

Yes - leaving pin D unconnected disables the reset delay function, causing immediate assertion of the RO signal when V_Q falls below 4.5 V. However, this eliminates power-on sequencing control and may cause premature MCU reset during slow-rising input conditions; Infineon recommends using ≥10 nF for reliable startup behavior.