LTC1255 Datasheet | Linear Technology

LTC1255 Dual 24V High-Side MOSFET Driver Features s s s s s s s s s DESCRIPTIO Fully Enhances N-Channel Power MOSFETs 12µA Standby Current Operates at Supply Voltages from 9V to 24V Short Circuit Protection Easily Protected Against Supply Transients Controlled Switching ON and OFF Times No External Charge Pump ponents patible With Standard Logic Families Available in 8-Pin SOIC The LTC1255 dual high-side driver allows using low cost N-channel FETs for high-side industrial and automotive 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 ponents. 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. APPLICATI s s s s s s s Solenoid Drivers DC Motor Drivers Stepper Motor Drivers Lamp Drivers/Dimmers Relay Drivers Low Frequency H-Bridge P-Channel Switch Replacement TYPICAL APPLICATI Dual 24V High-Side Switch with Overcurrent Protection 24V + 0.036Ω 10µF VS DS1 DS2 0.036Ω SUPPLY CURRENT (µA) IRLR024 12V G1 LTC1255 G2 IN1 GND IN2 12V IRLR024 24V/0.5A SOLENOID FROM 1N4001 µP, ETC. FROM µP, ETC. 1N4001 24V/0.5A SOLENOID - TA01 Standby Supply Current 50 45 40 35 30 25 20 15 10 5 0 0 5 15 20 10 SUPPLY VOLTAGE (V) 25 30 VIN1 = VIN2 = 0V TA = 25°C - TA02 LTC1255 ABSOLUTE AXI U RATI GS Operating Temperature Range LTC1255C............................................... 0°C to 70°C LTC1255I ........................................... - 40°C to 85°C Storage Temperature Range...