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| SP6644 Datasheet, PDF (13/15 Pages) Sipex Corporation – Single/Dual Alkaline Cell, High Efficiency Step-Up DC-DC Converter | |||
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SCHEMATIC WITH LDO COMBINATION
0.88V to 3.3V Input
VBATT
GND
+ C1
47µF
L1 22µH
1
J1 2
3
BATTLO
SHDN
R4 1M
1 VBATT
2
BATTLO SP6644
3 RLIM
U1
4 SHDN
VOUT 8
LX 7
GND 6
FB 5
R3
2.5k
LX
+3.3V
VOUT
+
R1
Open
C2
47µF
GND
1 VIN
VOUT 5
2 GND SP6201
3 ENABLE RESET_N 4
+3.0V
VOUT
C3
1µF
R2
100k
Probe access points for external connection by the user
Figure 29. Schematic SP6644/6201 DC/DC LDO Combination
Rev:B Date 4/13/04
SP6644/6645 High Efficiency Boost Regulator
13
© Copyright 2004 Sipex Corporation
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