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PDF XRP6670 Data sheet ( Hoja de datos )
| Número de pieza | XRP6670 | |
| Descripción | 3A 300kHz-2.5MHz Synchronous Step Down Regulator | |
| Fabricantes | Exar | |
| Logotipo |  |
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XRP6670
3A 300kHz-2.5MHz Synchronous Step Down Regulator
June 2013
GENERAL DESCRIPTION
The XRP6670 is a synchronous current mode
PWM step-down (buck) regulator capable of
delivering up to 3 Amps. A 2.6V to 5.5V input
voltage range allows for single supply
operation from industry standard 3.3V and 5V
power rails.
Based on a current mode PWM control
scheme, the XRP6670 operating frequency is
programmable between 300kHz and 2.5MHz
via an external resistor. This flexibility allows
the XRP6670 to optimize component selection
and reduce component count and solution
footprint. It provides a low output voltage
ripple, excellent line and load regulation and
has a 100% duty cycle LDO mode. Output
voltage is adjustable to as low as 0.8V with a
better than 2% accuracy while a low quiescent
current supports the most stringent battery
operating conditions.
Built-in over-temperature, overcurrent, short
circuit and under-voltage lock-out protections
insure safe operations under abnormal
operating conditions.
The XRP6670 is offered in a RoHS compliant,
“green”/halogen free 3mmx3mm 10-pin DFN
package.
Rev. 1.0.1
APPLICATIONS
• Industrial & Medical Equipment
• Audio-Video Equipment
• Networking & Telecom Equipment
• Portable/Battery Operated Equipment
FEATURES
• Guaranteed 3A Output Current
− Input Voltage: 2.6V to 5.5V
• Prog. PWM Current Mode Control
− Programmable 300kHz to 2.5MHz
− 100% Duty Cycle LDO Mode Operation
− Achieves 95% Efficiency
• Adjustable Output Voltage Range
− 0.8V to 5V with ±2% Accuracy
• Enable and Power Good Functions
• 460µA Quiescent Current
• Over-temperature, Over-current,
Short-circuit and UVLO Protections
• RoHS Compliant “Green”/Halogen Free
3mm x 3mm 10-Pin DFN Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP6670 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  
XRP6670
3A 300kHz-2.5MHz Synchronous Step Down Regulator
TYPICAL PERFORMANCE CHARACTERISTICS
All data taken at VIN = VDD = VPVDD = 3.3V, TJ = TA = 25°C, unless otherwise specified - Schematic and BOM from Application
Information section of this datasheet.
Fig. 4: Supply Current Versus Input Voltage
Fig. 5: Supply Current versus Ambient Temperature
Fig. 6: Efficiency versus Output Current
Fig. 7: PMOS RDSON Resistance versus Ambient Temperature
Fig. 8: NMOS RDSON Resistance versus Ambient Temperature
Fig. 9: Frequency versus Ambient Temperature
© 2013 Exar Corporation
5/13
Rev. 1.0.1
5 Page 
XRP6670
3A 300kHz-2.5MHz Synchronous Step Down Regulator
TYPICAL APPLICATIONS
5V TO 3.3V CONVERSION – 1MHZ
Fig. 17: 3.5V-5.5V to 3.3V Conversion
1MHz Switching Operations
5V TO 3.3V CONVERSION – 2.5MHZ
Fig. 18: 4V-5.5V to 3.3V Conversion
2.5MHz Switching Operations
© 2013 Exar Corporation
11/13
Rev. 1.0.1
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet XRP6670.PDF ] | |
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