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  Richtek Technology Electronic Components Datasheet  

RT4801H Datasheet

Dual Output LCD Bias

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RT4801H
Dual Output LCD Bias for Smartphones and Tablets
General Description
The RT4801H is a highly integrated Boost and LDO
and inverting charge pump to generate positive and
negative output voltage. The output voltages can be
adjusted from 4V to 6V with 100mV steps by I2C
interface protocols. With its input voltage range of 2.5V
to 5.5V, RT4801H is optimized for products powered by
single-cell batteries and symmetrical output currents up
to 80mA. The RT4801H is available in the WL-CSP-
15B 1.31x2.07 (BSC) package.
Ordering Information
RT4801H
Package Type
WSC : WL-CSP-15B 1.31x2.07 (BSC)
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
2.5V to 5.5V Supply Voltage Range
Up to 90% Efficiency with Small Magnetics
Support Up to 80mA Output Current
Low 1A Shutdown Current
Internal Soft-start Function
Short Circuit Protection Function
Over-Voltage Protection Function
Over-Current Protection Function
Over-Temperature Protection Function
Elastic Positive and Negative Voltage On/Off
Control by ENP/ENN
Voltage Output from 4V to 6V per 0.1V
Low Input Noise and EMI
Output with Programmable Fast Discharge when
IC Shutdown
Adjustable Output Voltage by I2C Compatible
Interface
Available in the 15-Ball WL-CSP Package
Applications
TFT-LCD Smartphones
TFT-LCD Tablets
General Dual Power Supply Applications
Simplified Application Circuit
L1
LXP
VIN
VIN
RT4801H
VOP
CIN
ENP
VON
ENN
SCL
BST
SDA
CF1
PGND GND CF2
COP
CON
CBST
VOP
VON
CF1
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
DS4801H-00 May 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT4801H Datasheet

Dual Output LCD Bias

No Preview Available !

RT4801H
Pin Configurations
(TOP VIEW)
ENN A1 A2 A3 CF2
VON
ENP B1 B2 B3 PGND
SCL
VIN C1 C2 C3 CF1
SDA
LXP D1 D2 D3 BST
GND
PGND E1 E2 E3 VOP
BST
WL-CSP-15B 1.31x2.07 (BSC)
Marking Information
49W
49 : Product Code
W : Date Code
Functional Pin Description
Pin No.
Pin Name
Pin Function
A1 ENN
Enable Control Input for VON.
A2 VON
Negative Terminal Output.
A3 CF2
Negative Charge Pump Flying Capacitor Pin.
B1 ENP
B2 SCL
Enable Control Input for VOP.
Clock of I2C.
B3, E1 PGND
Power Ground.
C1 VIN
C2 SDA
Power Input.
Data of I2C.
C3 CF1
Negative Charge Pump Flying Capacitor Pin.
D1 LXP
Switching Node of Boost Converter.
D2 GND
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
D3, E2 BST
Output Voltage of Boost Converter.
E3 VOP
Positive Terminal Output.
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS4801H-00 May 2016


Part Number RT4801H
Description Dual Output LCD Bias
Maker Richtek
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RT4801H Datasheet PDF






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