Datasheet

10
LTC1155
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
X-NOR Fault DetectionHigh Side Driver with V
DS
Sense Short-Circuit Shutdown
Low Side Driver with Drain End Current Sensing Low Side Driver with Source End Current Sensing
1155 TA04
1/2
LTC1155
GND
G1
DS1
V
S
IN1
4.5V TO 6V
30k
270k
5V
10µF
LOAD
0.01µF
*
IRLZ24
*ANY 74C OR 74HC LOGIC GATE.
MOSFET SHUTS DOWN IF V
DS
> 1V
+
Truth Table
IN OUT CONDITION FLT
0 0 Switch OFF 1
1 0 Short Circuit 0
0 1 Open Load 0
1 1 Switch ON 1
1155 TA05
1/2
LTC1155
GND
G1
DS1
V
S
IN1
4.5V TO 6V
0.1Ω
100k
10µF
LOAD
IRLD024
FAULT
10k
74C266
+
1155 TA06
1/2
LTC1155
GND
G1
DS1
V
S
IN1
5V
0.05Ω
5%
10µF
LOAD
SMP25N05
+
1155 TA07
1/2
LTC1155
GND
G1
DS1
V
S
IN1
5V
51Ω
10µF
LOAD
SMP25N05
*DO NOT SUBSTITUTE. MUST BE A PRECISION, SINGLE
SUPPLY, MICROPOWER OP AMP (I
Q
< 60µA)
–
+
51Ω
0.02Ω
5%
LT
®
1077*
V
LOAD
6
7
3
2
4
+