RT4801H

Copyright © 2016 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS4801H-00

May

2016

www.richtek.com

3

Function Block Diagram

N1

P1

SCP1

VOP

CF2

VIN

ENP

GND

PGND

LXP

PWM

Logic

UVLO

OCP1

SCP2

VON

DAC

+

-

Oscillator

I

2

C

VREF

Bandgap

Reference

-1x

Charge Pump

CF1

Soft-Start

ENN

SCL

LDO

+

-

GM

DAC

SDA

Fast

Discharge

VOP

VON

BST

OVP

Operation

The RT4801H is a highly integrated Boost, LDO and

inverting charge pump to generate positive and

negative output voltages for LCD panel bias or

consumer products. It can support input voltage range

from 2.5V to 5.5V and the output current up to 80mA.

Both

positive

and

negative

voltages

can

be

interface. The RT4801H provides Over-Temperature

Protection (OTP) and Short Circuit Protection (SCP)

mechanisms to prevent the device from damage with

abnormal operations. When the EN voltage is logic low

for more than 375

s, the IC will be shut down with low

input supply current less than 1

A.