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SP6641AEK-33TR Datasheet

  • SP6641AEK-33TR

  • 500mA Alkaline DC/DC Boost Regulator in SOT-23

  • 124.14KB

  • 13頁

  • SIPEX

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廬
SP6641A/6641B
500mA Alkaline DC/DC Boost Regulator in SOT-23
s
Ultra Low Quiescent Current: 10碌A(chǔ)
s
Wide Input Voltage Range: 0.9V to 4.5V
s
90mA I
OUT
at 1.3V Input (SP6641A-3.3V)
s
500mA I
OUT
at 2.6V Input (SP6641B-3.3V)
s
100mA I
OUT
at 2.0V Input (SP6641A-5.0V)
s
500mA I
OUT
at 3.3V Input (SP6641B-5.0V)
s
Fixed 3.3V or 5.0V Output Voltage
s
Up to 87% Efficiency
s
0.3鈩?NFET R
DS
on
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 V
BATT
SP6641
GND 2
5 Pin SOT-23
V
OUT
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鈥檚, MP3 players, and
other handheld portable devices. The SP6641 features a 10碌A(chǔ) quiescent current, a 0.3鈩?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.
L1
0.9V to 4.5V
V
BATT
V
BATT
5
廬
1 LX
D1
2 GND
3 V
OUT
R1
C3
C1
U1
SP6641A
SHDN
SHDN
I
OUT
(mA)
4
C2
V
OUT
+3.3V or 5V
SP6641A 3.3V & 5V:
C1 = C2 = 22碌F Ceramic, L1 = 22碌H CDRH5D28,
D1 = MBR0520, C3 = Open, R1 = Shorted.
SP6641B 3.3V & 5V:
C1 = C2 = 100碌F POSCAP, L1 = 10碌H CDRH5D28,
D1 = ZHCS2000, C3 = 1碌F Ceramic, R1 = 10鈩?
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
V
IN
(V)
Figure 1. Typical Application Schematic
Rev. 3/5/02,
*Patent Pending
Figure 2. Maximum Load Current in Operation
漏 Copyright 2002 Sipex Corporation
SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23
1

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