Datasheet

LTC2952
24
2952fb
LTC2952
μP
LT1767-3.3
SHDN**
V
OUT
V
IN
PFI
G1
VM
RST
INT
G1STAT
PFO
KILL
WDE
S1
G2
V1
V2
M1
M2
PB
EN
VS
ONT
C
ONT
*
22nF
GND OFFT
C
OFFT
*
68nF
R3
1.3M
*OPTIONAL
**SHDN INTERNALLY PULLED UP BY THE LT1767-3.3
2952 TA03
R4
100k
Q1
Si6993DQ
WALL ADAPTER
12V TO 25V 3.3V
Q2
Si6993DQ
9V BATTERY
R1
511k
R2
100k
R5
10k
R8
10k
R7
10k
R6
10k
Wall Adapter and Battery Automatic Load Switchover with Pushbutton Control, Voltage Monitors and Watchdog
TYPICAL APPLICATIONS
Wall Adapter and Battery Automatic Load Switchover with Simple On/Off Pushbutton
Control and Voltage Monitors for System Power without μP
LTC2952
LT1767-2.5
SHDN**
V
OUT
V
IN
PFI
G1
VM
INT
G1STAT
PFO
KILL
WDE
G2
V1
S1
V2
M1
M2
PB
EN
VS
ONT
C
ONT
*
22nF
GND OFFT
C
OFFT
*
68nF
R3
511k
*OPTIONAL
**SHDN INTERNALLY PULLED UP BY THE LT1767-2.5
2952 TA02
R4
100k
Q1
Si7913DN
WALL ADAPTER
5V TO 20V 2.5V
Q2
Si7913DN
4.2V
SINGLE
CELL
Li-Ion
BATTERY
R1
365k
R2
100k
R8
10k
R7
1k
R6
1k
D2
D3
RST
R5
1k
D1
POWER LOW
INDICATOR
BAT OFF
INDICATOR
BAT LOW
INDICATOR