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LR8425 - 500KHz Synchronous Boost Converter

General Description

Chip Enable Input.

Internal integrated with 1Mohm pull down resistor.

CE=High: Normal free running operation.

Key Features

  • S: z 97% Efficiency at VOUT=5V from 3.3V Input z Device Quiescent Current: 37μA (Typ) z Guaranteed 2.5A Output Current at VOUT=5V from 3.3V Input z 500kHz PWM Switching Frequency z Synchronous and Embedded Power MOSFETs, No Schottky Diode Required z Low RDS(ON) (main switch/synchronous switch) at 5.0V output: 20/40mohm z Input Voltage Range: 1.8V to 5.25V z Adjustable Output Voltage Range: from 2.5V to 5.5V z Pulse Frequency Modulation Operation for Improved Efficiency at Low Output Power z Curr.

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Datasheet Details

Part number LR8425
Manufacturer LRC
File Size 168.20 KB
Description 500KHz Synchronous Boost Converter
Datasheet download datasheet LR8425 Datasheet

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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.

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5A, 500KHz Synchronous Boost Converter with Output Disconnect LESHAN RADIO COMPANY, LTD. LR8425 Series „ INTRODUCTION: The /58425 devices provide a power supply solution for products powered by either a one-cell Li-Ion or Li-polymer, or a two to three-cell alkaline, NiCd or NiMH battery. The converter generates a stable output voltage that is adjusted by an external resistor divider. It provides high efficient power conversion and is capable of delivering output currents up to 1.5A at 5V at a supply voltage down to 2V. The implemented boost converter is based on a fixed switching frequency (500kHz typical), current-mode controller using a synchronous rectifier to obtain maximum efficiency.