XRP7713_10 Datasheet, PDF (1/29 Pages) Exar Corporation – Three Channel Digital PWM Step Down Controller

December 2010
XRP7713
Three Channel Digital PWM Step Down Controller
Rev. 1.1.1
GENERAL DESCRIPTION
The XRP7713 is a three output pulse-width
modulated (PWM) step-down DC-DC controller
with a built-in LDO for standby power and
GPIOs. The device provides a complete power
management solution in one IC and is fully
programmable via an I²C serial interface.
Independent Digital Pulse Width Modulator
(DPWM) channels regulate output voltages
and provide all required protection functions
such as current limiting and over-voltage
protection.
Each output voltage can be programmed from
0.9V to 5.1V without the need of an external
voltage divider. The wide range of the
programmable DPWM switching frequency
(from 300 KHz to 1.5 MHz) enables the user to
optimize between efficiency and component
size. Input voltage range is from 4.75V to
25V. An I²C bus interface is provided to
program the IC as well as to communicate
with the host for fault reporting and handling,
power rail parameters monitoring, etc.
The device offers a complete solution including
independently programmable: soft-start, soft-
stop, start-up delay and ramp of each PWM
regulator.
TYPICAL APPLICATION DIAGRAM
APPLICATIONS
• Multi Channel Power Supplies
• Audio-Video Equipments
• Industrial & Telecom Equipments
• Processors & DSPs Based Equipments
FEATURES
• 3 Channel Step Down Controller
− Programmable Output Voltage 0.9V-5.1V
− Programmable 1.5MHz DPWM Frequency
− Integrated FET Drivers
• 4.75V to 5.5V and 5.5V to 25V Input
Voltage Range
• Up to 5 Reconfigurable GPIO Pins
• Fully Programmable via I²C Interface
• Independent Digital Pulse Width
Modulator (DPWM) channels
• Complete Monitoring and Reporting
• Complete Power Up/Down Sequencing
• Full On Board Protection
OTP, UVLO, OCP and OVP
• Built-in 3.3V/5V LDO
• PowerArchitect™ Design Software
• Green/Halogen Free 32-pin TQFN
Fig. 1: XRP7713 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] – Fax. [phone]