LTC1255
U
TYPICAL APPLICATIO S
18V to 32V Operation with Overcurrent Shutdown and Optional
Overvoltage Shutdown
18V TO 32V
R
SEN
1k
1k
0.10Ω
1W
+
(I
= V /R
BE SEN
)
MAX
24V
1N5252B
1µF
50V
10k
2N3906
V
36V*
1N5258B
S
DS1
2N3904
1/2 LTC1255
10k
FROM
µP, ETC.
IRF530
IN1
G1
GND
12V
1N5242B
*OPTIONAL 36V OVERVOLTAGE SHUTDOWN
18V TO 32V
LOAD
LTC1255 • TA08
Bootstrapped Gate Driver (100Hz < fO < 10kHz)
High-Side Switch with Thermal Shutdown (PTC Thermistor)
9V TO 24V
9V TO 24V
+
+
10µF
1N4148
10µF
PTC*
0.036Ω
THERMISTOR
(100°C)
V
V
S
S
DS1
DS1
100k
0.1µF
1/2 LTC1255
1/2 LTC1255
G1
2N2222
G1
IRF530
FROM
µP, ETC.
FROM
µP, ETC.
IN1
IN1
12V
1N5242B
*
GND
GND
IRFZ44
12V
1N5242B
LOAD
*V = V – 0.6V
GS
*KEYSTONE RL2006-100-100-30-PT
S
(CLAMPED AT 12V)
RISE AND FALL TIMES
ARE BETA TIMES FASTER
LOAD
2N3906
LTC1255 • TA10
LTC1255 • TA09
13
Linear [ Linear ]
