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RT2857B - Synchronous Step-Down Converter

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.

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.

📥 Download Datasheet

Datasheet preview – RT2857B

Datasheet Details

Part number RT2857B
Manufacturer Richtek
File Size 479.81 KB
Description Synchronous Step-Down Converter
Datasheet download datasheet RT2857B Datasheet
Additional preview pages of the RT2857B datasheet.

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Full PDF Text Transcription

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Design Tools ® RT2857B 6A, 18V, Synchronous Step-Down Converter 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. Fault condition protections include output over-current protection, output over-voltage protection, and overtemperature protection. The low current shutdown mode provides output disconnection, enabling easy power management in battery-powered systems.
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