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PDF XRP7665 Data sheet ( Hoja de datos )
| Número de pieza | XRP7665 | |
| Descripción | 3A 18V Synchronous Step-Down Converter | |
| Fabricantes | Exar | |
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XRP7665
3A 18V Synchronous Step-Down Converter
March 2013
GENERAL DESCRIPTION
The XRP7665 is a synchronous current-mode
PWM step down (buck) regulator capable of a
constant output current up to 3 Amps. A wide
4.50V 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
100mΩ/90mΩ MOSFETs, the XRP7665 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 0.1µA.
Built-in output over voltage (open load), over
temperature, cycle-by-cycle over current and
under voltage lockout (UVLO) protections
insure safe operations under abnormal
operating conditions.
The XRP7665 is a pin and function compatible
device to MP1484 and a 3A pin to pin upgrade
to XRP7664.
The XRP7665 is offered in a RoHS compliant,
“green”/halogen free 8-pin exposed pad SOIC
package.
Rev. 2.0.1
APPLICATIONS
Distributed Power Architectures
Point of Load Converters
Audio-Video Equipments
Medical & Industrial Equipments
FEATURES
Pin/Function Compatible to MP1484
3A Continuous Output Current
4.50V to 18V Wide Input Voltage
PWM Current Mode Control
340kHz Constant Operations
Up to 93% Efficiency
Adjustable Output Voltage
0.925V to 16V Range
2.0% Accuracy
Programmable Soft-Start and Enable
Function
Built-in Thermal, Over Current, UVLO
and Output Over Voltage Protections
RoHS Compliant “Green”/Halogen Free
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. +1 510 668-7000 – Fax. +1 510 668-7001
1 page  
XRP7665
3A 18V Synchronous Step-Down Converter
TYPICAL PERFORMANCE CHARACTERISTICS
All data taken at VIN = 12V, VOUT=3.3V, TJ = TA = 25°C, unless otherwise specified - Schematic and BOM from Application
Information section of this datasheet.
Fig. 4: Efficiency versus output current
Fig. 5: RDSONH versus case temperature
Fig. 6: RDSONL versus case temperature
Fig. 7: Feedback voltage versus case temperature
Fig. 8: Quiescent current versus case temperature
Fig. 9: Output voltage versus output current
© 2013 Exar Corporation
5/12
Rev. 2.0.1
5 Page 
XRP7665
3A 18V Synchronous Step-Down Converter
PACKAGE SPECIFICATION
8-PIN SOIC EXPOSED PAD
Unit: mm (inch)
Eject hole, oriented hole and mold mark are optional.
© 2013 Exar Corporation
11/12
Rev. 2.0.1
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet XRP7665.PDF ] | |
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