RT4803 2.5MHz, Synchronous Boost Regulator with Bypass Mode

PublishTime：2021-07-09

●General Description
■The RT4803 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 RT4803 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 system minimum. In boost mode, output voltage regulation is guaranteed to a maximum load current of 2A. Quiescent current in Shutdown Mode is less than 1A, which maximizes battery life. The regulator transitions smoothly between Bypass and normal Boost Mode. The device can be forced into Bypass Mode to reduce quiescent current.
■The RT4803 is available in the WL-CSP-16B 1.67x1.67(BSC) package.
●Features
■4 Few External Components: 0.47μH Inductor and 0603 Case Size Input and Output Capacitors
■Input Voltage Range: 1.8V to 5V
■Output Range from 2.85V to 4.4V
▲VSEL= L 3.3V
▲VSEL= H 3.55V
■Maximum Continuous Load Current: 2A at V-IN> 2.65V Boosting V-OUT to 3.35V
■Up to 96% Efficient
■True Bypass Operation when V-IN> Target V-OUT
■Internal Synchronous Rectifier
■Soft-Start with True Load Disconnect
■Forced Bypass Mode
■V-SEL Control to Optimize Target V-OUT
■Short-Circuit Protection
■I²C Controlled Interface
■Ultra low Operating Quiescent Current
■Small WL-CSP 16B Package
■Discharge Function

Brand of Product：	RICHTEK
Part#：	RT4803 、 RT4803□ 、 RT4803WSC More Part#
Product Category：	Synchronous Boost Regulator with Bypass Mode More
Application：	[ Single-Cell Li-Ion, LiFePO4 Smart-Phones or Tablet ][ 2.5G/3G/4G Mini-Module Data Cards ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	WL-CSP-16B
Language：	English Chinese Chinese and English Japanese
Date of Creation：	January 2020
Version Number：
Data Encoding：	DS4803-03
Data Size：	1.4 MB

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