RT4813A Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – High Efficiency Boost Converter

RT4813A
High Efficiency Boost Converter
General Description
The RT4813A 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 RT4813A 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 3.25A.
Quiescent current in Shutdown Mode is less than 1A,
which maximizes battery life.
Ordering Information
RT4813A
Package Type
QUF : UQFN-9L 2x2 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
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
 Average Output Current Limit Range : 3250mA
to 2500mA
 Internal Compensation
 Output Discharge
 Output Short Protection
 True Load Disconnect
Applications
 Single-Cell Li-Ion, LiFePO4 Smart-Phones
 Portable Equipment
Marking Information
3XW
3X : Product Code
W : Date Code
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.
Simplified Application Circuit
L1
V_IN
C1
C2
I²C Control
RT4813A
SW
VOUT
VIN
FB
SCL
EN
SDA
GND
V_OUT
R1
C3
R2
EN
R3
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
DS4813A-00 April 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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