LTC2960
15
2960fa
For more information www.linear.com/LTC2960
Typical applicaTions
LT3009-5
V
IN
GND
OUT
SHDN
LTC2960-4
V
CC
GND
MR
IN
–
ADJ
DV
CC
RST
OUT
R3A
7.32M*
R3B
118k*
R4
10k
R2
68k*
V
IN
16.4V
V
OUT
5V
20mA MAX
C1
0.1µF
50V
R1
182k*
FAULT
2960 F12
C2
1µF
16V
UPPER THRESHOLD = 16.897V
LOWER THRESHOLD = 12.3V
*VISHAY-DALE CRCW SERIES 0603 1%
Figure 12. Window Comparator for High Voltage Input
dump condition. The LT3991 buck regulator in conjunc-
tion with the LTC2960 draw <10µA quiescent current for
no
load, which limits the drain on the vehicle battery even
after long periods of inactivity.
Window Comparator for High Voltage Input
The LTC2960-4 can be configured as a window compara
-
tor to
monitor high voltage supplies or battery stacks as
shown
in Figure 12. A fault signal is generated if V
IN
is out
of regulation. The OUT output of the LTC2960-4 is fed back
into the MR input to drive the RST output. A micropower
LDO provides bias to the active pull-up DV
CC
supply for
low static current draw in the outputs.
Micropower Power Supply Sequencer and Supervisor
Figure 13 illustrates multiple uses for the LTC2960 in a
power supply system. U1 is a power supply sequencer
whose IN
+
input monitors V
IN
and enables the 5V switch-
ing regulator.
The ADJ input monitors the output of the
5V switching regulator and enables the 1.8V LDO after a
16ms Reset Timeout Period. U2 is a supervisor monitor
-
ing the 5V and 1.8V outputs. The OUT output by virtue
of the MR pin, keeps the RST
output low until the 1.8V
supply is ready.
