XRP6668 Datasheet, PDF (1/11 Pages) Exar Corporation – Step Down Converter

January 2011
XRP6668
1A/1A Dual Channel 1.5MHz Sync. Step Down Converter
Rev. 1.2.0
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 efficiency 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,
“green”/halogen free 8-pin exposed pad SOIC
package.
APPLICATIONS
• Portable Equipments
• Battery Operated Equipments
• Audio-Video Equipments
• Networking & Telecom Equipments
FEATURES
• Dual Channel Step Down Converter
• Guaranteed 1A/1A Output Current
− Input Voltage: 2.5V to 5.5V
• 1.5MHz PWM Current Mode Control
− PFM Mode Operations at Light Load
− 100% Duty Cycle LDO Mode Operations
• Adjustable Output Voltage Range
− As Low as 0.6V with ±3% Accuracy
• Internal Compensation Network
• 30µA Quiescent Current
• Over Temperature & UVLO Protections
• RoHS Compliant “Green”/Halogen Free
8-Pin Exposed Pad SOIC Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP6668 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] – Fax. [phone]