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LM5157 - Boost/SEPIC/Flyback Converter

Description

The LM5157 device is a wide input range, nonsynchronous boost converter with integrated 50-V 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.

Features

  • Suited for wide operating range for battery.

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Full PDF Text Transcription

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LM5157 SNVSBK7A – JULY 2021 – REVISED AUGUST 2023 LM5157 2.2-MHz Wide VIN 50-V Boost/SEPIC/Flyback Converter with Dual Random Spread Spectrum 1 Features • Suited for wide operating range for 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 ≤ 670 µA) • Small solution size and low cost – Maximum switching frequency up to 2.
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