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RT4803B - 2.5MHz Synchronous Boost Regulator

Description

The RT4803B allows systems to take advantage of new battery chemistries that can supply significant energy when the battery voltage is lower than the required voltage for system power ICs.

Features

  • Input Voltage Range: 1.8V to 5V.
  • Programmable Output Voltage from 2.85V to 4.4V with 50mV/Step.
  • Default Boost Output Voltage Setting:.
  • VOUT = 3.4V at VSEL = H.
  • VOUT = 3.15V at VSEL = L.
  • Maximum Continuous Load Current: 2A at VIN > 2.65V Boosting VOUT to 3.35V.
  • Up to 95% Efficiency.
  • nBYP (L): Forced Bypass Mode.
  • nBYP (H): Auto Bypass Operation when VIN > Target VOUT.
  • Internal Synchronous Rectifier.
  • Overcurrent Protection.
  • Undervoltage P.

📥 Download Datasheet

Datasheet preview – RT4803B

Datasheet Details

Part number RT4803B
Manufacturer Richtek
File Size 1.25 MB
Description 2.5MHz Synchronous Boost Regulator
Datasheet download datasheet RT4803B Datasheet
Additional preview pages of the RT4803B datasheet.

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Full PDF Text Transcription

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2.5MHz Synchronous Boost Regulator RT4803B 1 General Description The RT4803B allows systems to take advantage of new battery chemistries that can supply significant energy when the battery voltage is lower than the required voltage for system power ICs. By combining built-in power transistors, synchronous rectification, and low supply current, this IC provides a compact solution for systems using advanced Li-Ion battery chemistries. The RT4803B is a boost regulator designed to provide a minimum output voltage from a single-cell Li-Ion battery, even when the battery voltage is below the system minimum. In boost mode, output voltage regulation is guaranteed up to a maximum load current of 2000mA. The quiescent current in shutdown mode is less than 1A, which maximizes battery life.
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