LTC1255_15 Datasheet, PDF (1/16 Pages) Linear Technology – Dual 24V High-Side MOSFET Driver

FEATURES
s _{Fully Enhances N-Channel Power MOSFETs}
s _{12µA Standby Current}
s _{Operates at Supply Voltages from 9V to 24V}
s _{Short Circuit Protection}
s _{Easily Protected Against Supply Transients}
s _{Controlled Switching ON and OFF Times}
s _{No External Charge Pump Components}
s _{Compatible With Standard Logic Families}
s _{Available in 8-Pin SOIC}
APPLICATI S
s _{Solenoid Drivers}
s _{DC Motor Drivers}
s _{Stepper Motor Drivers}
s _{Lamp Drivers/Dimmers}
s _{Relay Drivers}
s _{Low Frequency H-Bridge}
s _{P-Channel Switch Replacement}
LTC1255
Dual 24V High-Side
MOSFET Driver
DESCRIPTIO
The LTC1255 dual high-side driver allows using low
cost N-channel FETs for high-side industrial and auto-
motive switching applications. An internal charge pump
boosts the gate drive voltage above the positive rail,
fully enhancing an N-channel MOS switch with no
external components. Low power operation, with 12µA
standby current, allows use in virtually all systems with
maximum efficiency.
Included on-chip is independent overcurrent sensing
to provide automatic shutdown in case of short circuits.
A time delay can be added to the current sense to
prevent false triggering on high in-rush current loads.
The LTC1255 operates from 9V to 24V supplies and is
well suited for industrial and automotive applications.
The LTC1255 is available in both an 8-pin DIP and an
8-pin SOIC.
TYPICAL APPLICATI
Dual 24V High-Side Switch with Overcurrent Protection
24V
0.036Ω
IRLR024
+
10µF
12V
V_S
DS1
DS2
G1 LTC1255 G2
IN1
IN2
GND
0.036Ω
IRLR024
12V
24V/0.5A
SOLENOID
FROM
1N4001 _{µP, ETC.}
FROM
µP, ETC.
1N4001
24V/0.5A
SOLENOID
LTC1255 • TA01
Standby Supply Current
50
45
V_IN1 = V_IN2 = 0V
T_A = 25°C
40
35
30
25
20
15
10
5
0
0
5 10 15 20 25 30
SUPPLY VOLTAGE (V)
LTC1255 • TA02
1