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SP6641B

Sipex
Part Number SP6641B
Manufacturer Sipex
Description 500mA Alkaline DC/DC Boost Regulator
Published Jun 7, 2005
Detailed Description ® SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23 s Ultra Low Quiescent Current: 10µA s Wide Input Voltag...
Datasheet PDF File SP6641B PDF File

SP6641B
SP6641B

Overview
® SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23 s Ultra Low Quiescent Current: 10µA s Wide Input Voltage Range: 0.
9V to 4.
5V s 90mA IOUT at 1.
3V Input (SP6641A-3.
3V) s 500mA IOUT at 2.
6V Input (SP6641B-3.
3V) s 100mA IOUT at 2.
0V Input (SP6641A-5.
0V) s 500mA IOUT at 3.
3V Input (SP6641B-5.
0V) s Fixed 3.
3V or 5.
0V Output Voltage s Up to 87% Efficiency s 0.
3Ω NFET RDSon s Startup Voltage Guaranteed at 0.
9V s 0.
33A Inductor Current Limit (SP6641A) s 1A Inductor Current Limit (SP6641B) s Logic Shutdown Control s SOT-23-5 Package LX 1 5 VBATT SP6641 GND 2 5 Pin SOT-23 VOUT 3 4 SHDN APPLICATIONS s PDA's s DSC's s CD/MP3 Players s Pagers s Digital Cameras s Portable Handheld Medical Devices DESCRIPTION The SP6641 is an ultra-low quiescent current, high efficiency, DC-DC boost converter designed for single and dual cell alkaline, or Li-ion battery applications found in PDA’s, MP3 players, and other handheld portable devices.
The SP6641 features a 10µA quiescent current, a 0.
3Ω Nchannel charging switch, 0.
9V input startup, and a 0.
33A or 1.
0A inductor current limiting feature.
The SP6641 is offered in a 5 pin SOT-23 package and provides an extremely small power supply footprint optimized for portable applications.
The SP6641 is preset to 3.
3V and can be controlled by a 1nA active LOW shutdown pin.
L1 0.
9V to 4.
5V VBATT VBATT 5 ® 1 LX D1 2 GND 3 VOUT R1 C3 C1 U1 SP6641A SHDN SHDN IOUT (mA) 4 C2 VOUT +3.
3V or 5V SP6641A 3.
3V & 5V: C1 = C2 = 22µF Ceramic, L1 = 22µH CDRH5D28, D1 = MBR0520, C3 = Open, R1 = Shorted.
SP6641B 3.
3V & 5V: C1 = C2 = 100µF POSCAP, L1 = 10µH CDRH5D28, D1 = ZHCS2000, C3 = 1µF Ceramic, R1 = 10Ω.
700 650 600 550 500 450 400 350 300 250 200 150 100 50 0 1.
0 SP6641B, 1.
0A, 3.
3V SP6641B, 1.
0A, 5V SP6641A, 0.
33A, 3.
3V SP6641A, 0.
33A, 5V 1.
5 2.
0 2.
5 3.
0 3.
5 4.
0 4.
5 VIN (V) Figure 1.
Typical Application Schematic Rev.
3/5/02, *Patent Pending Figure 2.
Maximum Load Current in Operation © Copyright 2002 Sipex Corporation ...


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