XRP7662 Datasheet, PDF (1/19 Pages) Exar Corporation – 12A 300KHz Synchronous Step Down Regulator

XRP7 66 2
Pow er Blox ^TM
1 2 A 3 0 0 KHz Sy n ch r on ou s St ep Dow n Reg u lat or
September 2012
Rev. 2. 2.0
GENERAL DESCRIPTION
APPLICATIONS
The XRP7662 is a synchronous voltage mode
PWM step down (buck) regulator capable of a
constant output current up to 12 Amps. A wide
5V to 22V single input voltage range allows for
single supply operations from industry
standard 5V, 12V and 18V power rails.
Operations down to 3V are supported with an
additional biasing voltage.
xDistributed Power Architectures
xPoint of Lo ad Converters
xPower Supply Modules
xFPGAs , DSPs and Processors
Supplies
FEATURES
With a 3 00kHz constant operating frequency
and integrated high and low side switch, the
XRP7662 reduces the overall component count
and solut ion footprint. In addi tion to a 1%
output set - point accuracy, this device provides
high efficiency, low ripple and excellent line
and load regulation. An enable function and
soft start feature allow for controlled power up
sequencing implementation.
Built - in current limiting, U VLO, output short -
circuit and over temperature protection insure
safe operation under abnormal operating
conditions.
The XRP7662 is offered in a RoHS compliant,
lead free 26 - pin 7mmx4mm DFN package.
x12 A Continuous Current
x5 V- 22V Single Input Voltage Rail
3V -22V Input Voltage with 5V Bias
xPWM Voltage Mode Control
300kHz Fixed Synchronous Operations
Low RDSON Power Switches
0.8V Min. Output Voltage ±1% Accuracy
xType II & III Compensations Support
xProgrammable Soft Start
xOver Temperature & Short Circuit
Protection/Auto - Restart
xCurrent Limiting
xRoHS Compliant Lead Free 26
xUS Patent #6,922,041
- Pin DFN
TYPICAL APPLICATION DIAG RAM
Fig. 1: XRP7662 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] - 70 00 ±Fax. [phone] - 70 01