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LM51571-Q1 - Boost/SEPIC/Flyback Converter

Download the LM51571-Q1 datasheet PDF. This datasheet also covers the LM5157-Q1 variant, as both devices belong to the same boost/sepic/flyback converter family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM5157x-Q1 device is a wide input range, nonsynchronous boost converter with integrated 50-V, 6.5-A (LM5157-Q1) or 50-V, 4.33-A (LM51571-Q1) power switch.

The device can be used in boost, SEPIC, and flyback topologies.

The device can start up from a single-cell battery with a minimum of 2.9 V.

Key Features

  • AEC-Q100 qualified for automotive.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM5157-Q1-etcTI.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Texas Instruments

Part Number Description
LM5157 Boost/SEPIC/Flyback Converter
LM5157-Q1 Boost/SEPIC/Flyback Converter
LM5150-Q1 Wide VIN Automotive Boost Controller
LM51501-Q1 Wide VIN Automotive Boost Controller
LM5152-Q1 Synchronous Boost Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM5157-Q1, LM51571-Q1 SNVSBK8B – OCTOBER 2020 – REVISED AUGUST 2023 LM5157x-Q1 2.2-MHz Wide VIN 50-V Boost/SEPIC/Flyback Converter with Dual Random Spread Spectrum 1 Features • AEC-Q100 qualified for automotive applications – Temperature grade 1: –40°C to +125°C TA • Functional Safety-Capable – Documentation available to aid functional safety system design • Suited for wide operating range for car battery applications – 2.9-V to 45-V input operating range – 48-V maximum output (50-V abs max) – Minimum boost supply voltage of 1.5 V when BIAS ≥ 2.9 V – Input transient protection up to 50 V – Minimized battery drain • Low shutdown current (IQ ≤ 2.6 µA) • Low operating current (IQ ≤ 700 µA) • Small solution size and low cost – Maximum switching frequency up to 2.