XRP7720 Datasheet, PDF (1/28 Pages) Exar Corporation – Quad Output Universal Customizable PMIC with PFM

XRP7720
Quad Output Universal Customizable PMIC with PFM
January 2014
GENERAL DESCRIPTION
The XRP7720 is a quad output universal
customizable PMIC comprised of a quad
channel Digital Pulse Width Modulated (DPWM)
Step down (buck) controller and 5V LDO. A
wide 4.75V to 5.5V and 5.5V to 18V input
voltage dual range allows for single supply
operation from standard power rails. It is pin
compatible to the popular XRP7724 and
provides full flexibility during the development
phase while offering a cost effective option for
high volume production units.
With integrated FET gate drivers, it can
operate from 105kHz to 1.23MHz with
independent
channel-to-channel
programmable operating frequency, the
XRP7720 reduces overall component count
and solution footprint while optimizing
conversion efficiencies. A selectable digital
Pulse Frequency Mode (DPFM) and low
operating current result in better than 80%
efficiency down to 10mA load provides support
for portable and Energy Star compliant
applications. Each XRP7720 output channel is
individually programmable down to a
minimum 0.6V with a resolution of 2.5mV, and
configurable for precise soft start and soft stop
sequencing, including delay and ramp control.
During development, the XRP7720ILB-DEV is
configured using PowerArchitect^TM 5.1 (PA 5.1)
through an I²C interface, allowing for short
development of the power system and short
time to market for the entire system. Once
development is completed and volume
production is ready to commence, Exar will
assign a unique part suffix and deliver a
customized XRP7720.
Built-in independent output over voltage, over
temperature, over-current and under voltage
lockout protections ensure safe operation
under abnormal operating conditions.
The XRP7720 is offered in a RoHS compliant,
“green”/halogen free 44-pin TQFN package.
Rev. 1.0.0
FEATURES
 Pin Compatible to XRP7724
 SMBus Compliant I²C Interface available
on XRP7720ILB-DEV Only
 Supported by PowerArchitect™ 5.1
 XRP7720ILB-DEV Only
 Quad Channel Step-down Controller
 Digital PWM 105kHz-1.23MHz Operation
 Individual Channel Frequency Selection
 Patented digital PFM with Ultrasonic Mode
 Integrated MOSFET Drivers
 Programmable 5 coefficient PID control
 4.75V to 18V Input Voltage
 4.75V-5.5 and 5.5V-18V Input Range
 0.6V to 5.5V Output voltage
 3 x 15V Capable PSIOs + 2 x GPIOs
 Full Start/Stop Sequencing Support
 Built-in Thermal, Over-Current, UVLO
and Output Over-Voltage Protections
 On Board 5V Standby LDO
 7x7mm TQFN44 Package
APPLICATIONS
 Blade Servers
 Micro Servers
 Network Adapter Cards
 Switches/Routers
 Video Surveillance Systems
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] – Fax. [phone]