XRPWRKIT-LWP-1 Datasheet, PDF (1/7 Pages) Exar Corporation – 1 A/ 1 A Dual Channel 1 .5MHz Sync . Step Down Converter

February 2012
XRP6 6 6 8 EVB
1 A / 1 A D u a l Ch a n n e l 1 .5 M H z Sy n c. St e p D o w n Co n v e r t e r
Rev. 1. 1.0
GENERAL DESCRIPTION
The XRP6668 is a dual channel synchronous
current mode PWM step down (buck)
converter capable of delivering up to 1 Amp of
current per channel and optimized for portable
battery - operated applications.
Based on a current mode 1.5MHz
constant
frequency PWM control scheme, the XRP6668
reduces the overall component count and
solution footprint as well as provides a low
output voltage ripple and excellent line and
load regulation. It also implements a PFM
mode to improve light load effici ency as well
as a 100% duty cycle LDO mode. Output
voltage is adjustable to as low as 0.6V with a
better than 3% accuracy while a low quiescent
current supports the most stringent battery
operating conditions.
Built - in over temperature and under voltage
lock - out protections insure safe operations
under abnormal operating conditions.
The XRP6668 is offered in a RoHS compliant,
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package .
EVALUATI ON BOARD MANUAL
FEATURES
x Dual Channel Step Down Converter
x Guaranteed Dual 1A/1A Output Current
Input Voltage: 2.5V to 5.5V
x 1.5MHz PWM Current Mode Control
PFM Mode Operations at Light Load
100% Duty Cycle LDO Mode Operations
x Adjustable Output Voltage Range
x Internal Compensation Network
x30 µA Quiescent Current
xOver Temperature & UVLO Protections
EVALUATION BOARD SCH EMATICS
Fig. 1: XRP6658EVB Evaluation Board Schematics
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] - 70 00 ±Fax. [phone] - 70 01