XRP7665 Datasheet, PDF (1/12 Pages) Exar Corporation – 3A 18V Synchronous Step-Down Converter

XRP7 6 6 5
3 A 1 8 V Sy n ch r o n o u s St ep - Do w n Co n v er t er
March 2013
GENERAL DESCRIPTION
The X RP7665 is a synchronous current - mode
PWM step down (buck) regulator capable of a
constant output current up to
3 Amps. A wide
4.5 0V to 18V input voltage range allows for
single supply operations from industry
standard 5V and 12V power rails.
With a 340kHz constant operating frequency
and integrated high
and low side
10PŸ9PŸ026), (the7XVRP 7665 reduces
the overall component count
and solution
footprint. Current - mode control provides fast
transient response and cycle - by - cycle current
limit. An adjustable soft - start prevents inrush
current at turn - on, and in shutdown mode the
supply current drops to 0.1µ A.
Built - in output over volta ge (open load) , over
temperature , cycle - by - cycle over current and
under voltage lockout (UVLO)
protections
insure safe operations under abnormal
operating conditions.
The XRP 7665 is a pin and func tion compatible
device to MP1484 and a 3A pin to pin upgrade
to XRP7664 .
The XRP 7665 is offered in a RoHS compliant,
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package .
APPLICATIONS
x Distributed Power Architectures
x Point of Load Converters
xAudio - Video Equipments
x Medical & Industrial Equipments
Rev. 2.0. 1
FEATURES
xPin/Functio n Compatible to MP148
4
x3 A Continuous Output Current
x4. 50 V to 18V Wide Input Voltage
x PWM Current Mode Control
340kHz Constant Operations
 Up to 93% Efficiency
x Adjustable Output Voltage
0.925V to 16V Range
2.0 % Accuracy
x Programmable Soft
Function
- Start and Enable
xBuilt - in Thermal , Over Current , UVLO
and Output Over Voltage
Protections
x 5R+6&RPSOLDQW³*UHHQ´+DORJ
8 - Pin Exposed Pad SOIC Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP7665 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] - 70 00 ±Fax. [phone] - 70 01