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LR8401B22M

Description
Switching Regulator/Controller,
CategoryPower/power management    The power supply circuit   
File Size682KB,10 Pages
ManufacturerLRC
Websitehttp://www.lrc.cn
Download Datasheet Parametric View All

LR8401B22M Overview

Switching Regulator/Controller,

LR8401B22M Parametric

Parameter NameAttribute value
MakerLRC
package instruction,
Reach Compliance Codeunknown
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
Base Number Matches1
Synchronous Step-Up DC/DC Converter with PFM Control
CE8401 Series
LESHAN RADIO COMPANY, LTD.
Synchronous Step-Up DC/DC
Converter with PFM Control
LR8401 Series
INTRODUCTION
The LR8 401 Series is a Synchronous
step-up DC/DC Converter with PFM Control.
With the LR8 401 Series, a step-up
switching DC/DC converter can be configured
by using an external coil, capacitor. The
built-in MOSFET is turned off by a protection
circuit when the voltage at the LX pin exceeds
the limit to prevent it from being damaged.
FEATURES
External parts: Coil, capacitor
Output voltage: Settable to between 2.1V
to 5.5 V in 0.1 V steps
Maximum Oscillation frequency:300KHz
Accuracy of ±2%
High efficiency:95%
APPLICATIONS
Digital cameras
Electronic notebooks and PDAs
Portable CD/MD players
Cameras, video equipment,
Communications equipment
Power supply for microcomputers
BLOCK DIAGRAM
ORDER INFORMATION
LR8401①②③④
LX
Current
Limiting
comparator
DESIGNATOR
VOUT
SYMBOL
A
DESCRIPTION
Standard LX
With shutdown, LX
Output Voltage
(2.1½5.5)
e.g.:3.0V=②:3;
③:0
Package:SOT-23-3/5
Package:SOT-23
Package:SOT-89
Package:TO92
B
buffer
PFM
control
②③
Error
Amplifier
ref
Integer
M
MB
P
T
EN
Chip
Enable
OSC
VSS
1/10
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