RT4813

Copyright © 2016 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS4813-00

April

2016

www.richtek.com

1

High Efficiency Boost Converter

General Description

The RT4813 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 RT4813 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 3.1A.

Quiescent current in Shutdown Mode is less than 1

A,

which maximizes battery life.

Ordering Information

RT4813

Package Type

QUF : UQFN-9L 2x2 (FC) (U-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

Richtek products are :



RoHS compliant and compatible with the current

requirements of IPC/JEDEC J-STD-020.



Suitable for

use in

SnPb

or

Pb-free soldering

processes.

Features



CMCOT Topology and Small Output Ripple when

VIN Close VOUT Voltage



Operates from a Single Li-ion Cell : 1.8V to 5.5V



Adjustable Output Voltage : 1.8V to 5.5V



PSM Operation



Up to 96% Efficiency



Input Over Current Limit



Input / Output Over Voltage Protection



Programmable Average Output Current Limit

Range : 3100mA to 1225mA



Internal Compensation



Output Discharge



Output Short Protection



True Load Disconnect

Applications



Single-Cell Li-Ion, LiFePO4 Smart-Phones



Portable Equipment

Marking Information

3V : Product Code

W : Date Code

3VW

Simplified Application Circuit

GND

SW

VOUT

SCL

L1

C1

VIN

C2

C3

FB

RT4813

R1

R2

SDA

I

EN

EN

R3