LTC2960
TYPICAL APPLICATIONS
BUCK CONVERTER
V
BAT
NOT ALL LT3991 COMPONENTS SHOWN
6V TO 8.4V
V
OUT
V
V
IN
OUT
3.3V
R5
10M
R2
+
+
LT3991
C2
Li-Ion
4.2V
6.04M
R4
R6
1M
EN
47μF
16V
V
C1
0.1μF
25V
CC
2.26M
RT
OUT
GND
LTC2960-1
+
IN
MR
ADJ
Li-Ion
4.2V
RST
RESET
R1
402k
R
*
GND
ESD
R3
402k
10k
2960 F09
UVLO FALLING THRESHOLD = 6.410V
RESET FALLING THRESHOLD = 2.649V
*OPTIONAL RESISTOR FOR ADDED ESD PROTECTION
Figure 9. Configurable Regulator UVLO and Supervisor
M2
Si4435
M1
Si4435
V
BAT
6V TO 8.4V
V
OUT
R8
10k
1N5245
15V
R7
1M
+
Li-Ion
4.2V
R2
5.6M*
R6
100k
R4
6.04M*
R5
10M
V
RT
C1
0.1μF
25V
CC
OUT
ADJ
LTC2960-2
–
+
–
Li-Ion
4.2V
IN
RST
LOW BATTERY
R1
402k*
R3
402k*
MR
GND
2960 F10
IN FALLING THRESHOLD = 5.974V
ADJ FALLING THRESHOLD = 6.410V
*VISHAY-DALE CRCW SERIES 0603 1 %
Figure 10. Battery Disconnect to Protect Against Deep Discharge
BUCK CONVERTER
V
NOT ALL LT3991 COMPONENTS SHOWN
IN
IRLR2908
4V TO 27V
12V
VEHICLE BATTERY
V
OUT
V
IN
V
OUT
3.3V
R8
R2
R7
1M
R4
R6
6.04M
LT3991
GND
102k
825k
1.78M
C2
EN/SS
FB
22μF
25V
V
GATE OUT
FB
CC
R3
1M
V
DV
CC
CC
+
C1
1μF
50V
LT4356
IN
ADJ
LTC2960-3
FLT
OUT
RST
UV
OV
GND
R7
4.99k
R1
80.6k
R5
1M
MR
GND
2960 F11
+
IN FALLING THRESHOLD = 4.49V
ADJ FALLING THRESHOLD = 2.816V
Figure 11. Automotive Supervisor
2960f
13
Linear Systems [ Linear Systems ]
