RT2857B Datasheet Synchronous Step-Down Converter

Manufacturer: Richtek

RT2857B synchronous step-down converter by Richtek - Datasheet Preview

Datasheet Details

Part number	RT2857B
Manufacturer	Richtek
File Size	479.81 KB
Description	Synchronous Step-Down Converter
Download	RT2857B Download (PDF)

General Description

The RT2857B is a high efficiency, monolithic synchronous step-down DC-DC converter that can deliver up to 6A output current from a 4.5V to 18V input supply.

The RT2857B current-mode architecture with external compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during startup.

Overview

Design Tools ® RT2857B 6A, 18V, Synchronous Step-Down Converter.

Key Features

Low RDS(ON) Power MOSFET Switches 26mΩ/19mΩ.
Input Voltage Range : 4.5V to 18V.
Adjustable Switching Frequency : 200kHz to 1.6MHz.
Current-Mode Control.
Synchronous to External Clock : 200kHz to 1.6MHz.
Accurate Voltage Reference  0.6V ± 1%, Over.
40°C to 85°C  0.6V ± 1.5%, Over.
40°C to 150°C.
Monotonic Start-Up into Pre-biased Outputs.
Adjustable Soft-Start.
Power Good Indicator.
Over-Current Protection.
Over-Temperatu.

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