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SP6659 Datasheet(PDF) 1 Page - Sipex Corporation

Part No. SP6659
Description  1.5MHz, 600mA Synchronous Buck Regulator
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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SP6659 Datasheet(HTML) 1 Page - Sipex Corporation

 
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Date: 9/25/06 Rev C
SP6659 1.5MHz, 600mA Synchronous Buck Regulator
© 2006 Sipex Corporation
SP6659
The SP6659 is a 600mA synchronous buck regulator using a constant frequency, current mode
architecture. The output voltage can be programmed using an external resistor divider. The 2.5V
to 5.5V input voltage range is ideal for portable applications that use a Li-Ion battery. Switching
frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and
capacitors. The internal synchronous switch increases efficiency and eliminates the need for an
external Schottky diode. The output voltage can be programmed using an external resistor
divider. Low output voltages are easily supported with the 0.6V feedback reference voltage. The
SP6659 is available in a low profile 5 pin TSOT-23 package.
DESCRIPTION
FEATURES
■ 94% Efficiency Possible
■ 600mA Output Current at V
IN = 3.6V
■ 2.5V to 5.5V Input Voltage Range
■ 1.5MHz constant frequency operation
■ No Schottky Diode Required
■ Output Voltages as low as 0.6V
■ Slope Compensated Current Mode
Operation for Excellent Line and Load
Transient Response
■ 100 % Duty Cycle in LDO Mode
■ <1μA Shutdown Current, Quiescent
Current of 300 μA
■ Over-temperature protected
■ Pin Compatible to LTC3406B
■ Offered in Low Profile TSOT-23
package
APPLICATIONS
■ Cell Phones
■ Wireless and DSL Modems
■ DSC's
■ Portable Instruments
TYPICAL APPLICATION SCHEMATICS
Now Available in Lead Free Packaging
1.5MHz, 600mA Synchronous Buck Regulator
®
SP6659
4.7μF
Ceramic
VIN
GND
VOUT
10μF
Ceramic
VFB
SW
2.2μH
R1
R2
RUN
Cf
100pF
1
4
3
5
2
5
4
SP6659
5 Pin TSOT-23
VIN
GND
RUN
SW
VFB
1
2
3
5
4
SP6659
5 Pin TSOT-23
VIN
GND
RUN
SW
VOUT
1
2
3
Adjustable
Fixed
®
SP6659
4.7μF
Ceramic
VIN
GND
VOUT
10μF
Ceramic
VOUT
SW
2.2μH
RUN 1
4
3
5
2
Adjustable
Fixed


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