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PDF XRP7664 Data sheet ( Hoja de datos )
| Número de pieza | XRP7664 | |
| Descripción | 2A 18V Synchronous Step-Down Converter | |
| Fabricantes | Exar | |
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XRP7664
2A 18V Synchronous Step-Down Converter
March 2013
GENERAL DESCRIPTION
The XRP7664 is a synchronous current-mode
PWM step down (buck) voltage regulator
capable of a continuous output current up to
2Amps. A wide 4.5V 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/100mΩ MOSFETs, the XRP7664
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 XRP7664 is a pin and function compatible
device to MP1482.
The XRP7664 is offered in a RoHS compliant,
“green”/halogen free 8-pin SOIC package.
Rev. 2.0.1
APPLICATIONS
Distributed Power Architectures
Point of Load Converters
Audio-Video Equipments
Medical & Industrial Equipments
FEATURES
2A Continuous Output Current
4.5V to 18V Wide Input Voltage
PWM Current Mode Control
340kHz Constant Operations
Up to 95% Efficiency
Adjustable Output Voltage
0.925V to 16V Range
±2% Accuracy
Programmable Soft-Start and Enable
Function
Built-in Thermal, Over Current, UVLO
and Output Over Voltage Protections
Pin/Function Compatible to MP1482
RoHS Compliant, “Green”/Halogen
Free 8-Pin SOIC Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP7664 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  
XRP7664
2A 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 
PACKAGE SPECIFICATION
8-PIN SOIC
Unit: mm (inch)
XRP7664
2A 18V Synchronous Step-Down Converter
© 2013 Exar Corporation
11/12
Rev. 2.0.1
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet XRP7664.PDF ] | |
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