RT4812 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – High Efficiency Boost Converter

RT4812
High Efficiency Boost Converter
General Description
The RT4812 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 RT4812 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 2A.
Quiescent current in Shutdown Mode is less than 1A,
which maximizes battery life.
Ordering Information
RT4812
Package Type
J8F : TSOT-23-8 (FC)
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
 Boost Current Limit
 Input/Output Over Voltage Protection
 Pin Adjustable Current Limit Threshold
(2 levels)
 Internal Compensation
 Output Discharge
 Output Short Protection
 True Load Disconnect
Applications
 Single-Cell Li-Ion, LiFePO4 Smart-Phones
 Portable Equipment
Marking Information
0L=DNN
0L= : Product Code
DNN : Date Code
Simplified Application Circuit
L1
V_IN
C1
C2
H/L
RT4812
SW
VOUT
VIN
FB
EN
ILIM
GND
V_OUT
R1
C_FF
C3
R2
Copyright © 2015 Richtek Technology Corporation. All rights reserved.
DS4812-00 June 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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