sp6645eu-tr Exar Corporation, sp6645eu-tr Datasheet - Page 13

• Manufacturer Part Number: sp6645eu-tr
• Description: Sp6645 -single/dual Alkaline Cell, High Efficiency Boost Dc-dc Regulator
• Manufacturer: Exar Corporation

Figure 29. Schematic SP6644/6201 DC/DC LDO Combination
Date: 11/30/04
BATTLO
SHDN
V
GND
BATT
0.88V to 3.3V Input
J1
Probe access points for external connection by the user
1
2
3
+
C1
47µF
R3
2.5k
2
3
4
1
V
BATTLO
SHDN
R
BATT
LIM
SP6644/6645 High Efficiency Boost Regulator
SP6644
L1 22µH
R4 1M
U1
V
GND
OUT
FB
LX
8
7
6
5
13
R2
100k
R1
Open
SCHEMATIC WITH LDO COMBINATION
LX
+
C2
47µF
+3.3V
V
OUT
GND
2
3
1
ENABLE
GND
V
IN
SP6201
© Copyright 2004 Sipex Corporation
RESET_N
V
OUT
5
4
C3
1µF
+3.0V
V
OUT