RT4813
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 1A,
which maximizes battery life.
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 550mA
Internal Compensation
Output Discharge
Output Short Protection
True Load Disconnect
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 :
Applications
Single-Cell Li-Ion, LiFePO4 Smart-Phones
Portable Equipment
Marking Information
3V : Product Code
W : Date Code
3VW
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering
processes.
Simplified Application Circuit
L1
V
IN
C1
VIN
C2
SCL
SDA
GND
FB
R2
EN
R3
EN
SW
RT4813
VOUT
R1
C3
V
OUT
I
2
C Control
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS4813-09
August 2019
www.richtek.com
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