SP6641AEK Sipex Corporation, SP6641AEK Datasheet
SP6641AEK
Manufacturer Part Number
SP6641AEK
Description
Manufacturer
Sipex Corporation
Datasheet
1.SP6641B.pdf
(13 pages)
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SP6641AEK
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Other
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50
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SP6641AEK-3.3
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SIPEX
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TI
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Exar
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OPTK
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EXAR/艾科嘉
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SP6641AEK-L-3.3
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SIPEX
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EXAR/艾科嘉
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20 000
Figure 1. Typical Application Schematic
Rev. 5/26/05, *Patent Pending
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 N-
channel 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.
SP6641A 3.3V & 5V: C1 = C2 = 22µF Ceramic, L1 = 22µH CDRH5D28,
SP6641B 3.3V & 5V: C1 = C2 = 100µF POSCAP, L1 = 10µH CDRH5D28,
0.3Ω NFET R
SOT-23-5 Package
Ultra Low Quiescent Current: 10µA
Wide Input Voltage Range: 0.9V to 4.5V
90mA I
500mA I
100mA I
500mA I
Fixed 3.3V or 5.0V Output Voltage
Up to 87% Efficiency
Startup Voltage Guaranteed at 0.9V
0.33A Inductor Current Limit (SP6641A)
1A Inductor Current Limit (SP6641B)
Logic Shutdown Control
500mA Alkaline DC/DC Boost Regulator in SOT-23
D1
C2
R1
OUT
OUT
OUT
OUT
D1 = MBR0520, C3 = Open, R1 = Shorted.
D1 = ZHCS2000, C3 = 1µF Ceramic, R1 = 10Ω.
at 1.3V Input (SP6641A-3.3V)
at 2.6V Input (SP6641B-3.3V)
at 2.0V Input (SP6641A-5.0V)
at 3.3V Input (SP6641B-5.0V)
1
2
3
C3
DS
LX
GND
V
OUT
on
®
SP6641A
L1
U1
SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23
SHDN
V
®
®
BATT
5
4
C1
SHDN
0.9V to 4.5V
V
+3.3V or 5V
OUT
V
BATT
1
APPLICATIONS
Now Available in Lead Free Packaging
Figure 2. Maximum Load Current in Operation
700
650
600
550
500
450
400
350
300
250
200
150
100
PDA's
DSC's
CD/MP3 Players
Pagers
Digital Cameras
Portable Handheld Medical Devices
50
0
1.0
GND
V
OUT
LX
1.5
SP6641A/6641B
1
2
3
2.0
5 Pin SOT-23
SP6641
2.5
V
© Copyright 2002 Sipex Corporation
IN
(V)
3.0
SP6641B, 1.0A, 3.3V
SP6641B, 1.0A, 5V
SP6641A, 0.33A, 3.3V
SP6641A, 0.33A, 5V
3.5
5
4
V
SHDN
4.0
BATT
4.5
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