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RT4812

Description
High Efficiency Boost Converter
CategoryPower/power management    BoostConv   
File Size464KB,14 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet Parametric View All

RT4812 Overview

High Efficiency Boost Converter

RT4812 Parametric

Parameter NameAttribute value
StatusActive
Vin (min)(V)1.8
Vin (max)(V)5.5
Vout (min)(V)1.8
Vout (max)(V)5.5
Output Adj. MethodResistor
Iq (typ)(mA)0.09
SW Current Limit (typ)(A)
Freq (typ)(kHz)500
Freq (min)(kHz)
Freq (max)(kHz)
Ron (typ)(Ohm)0.03;0.045
FeaturesEnable Input;OCP;OVP;UVP
Package TypeTSOT-28(FC)
Datasheethttps://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS4812-07.pdf
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.
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
Ordering Information
RT4812
Package Type
J8F : TSOT-23-8 (FC)
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
0L=DNN
0L= : Product Code
DNN : Date Code
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
RT4812
L1
V
IN
C1
VIN
C2
EN
H/L
ILIM
GND
FB
R2
SW
VOUT
R1
C
FF
C3
V
OUT
Copyright © 2015 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS4812-00
June 2015
www.richtek.com
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