LTC1255 Dual 24V High-Side MOSFET Driver DESCRIPTIO FEATURES n Fully Enhances N-Channel Power MOSFETs The LTC1255 dual high-side driver allows using low n 12A Standby Current cost N-channel FETs for high-side industrial and auto- n Operates at Supply Voltages from 9V to 24V motive switching applications. An internal charge pump n Short Circuit Protection boosts the gate drive voltage above the positive rail, n Easily Protected Against Supply Transients fully enhancing an N-channel MOS switch with no n Controlled Switching ON and OFF Times external components. Low power operation, with 12A n No External Charge Pump Components standby current, allows use in virtually all systems with n Compatible With Standard Logic Families maximum efficiency. n Available in 8-Pin SOIC 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 APPLICATI S prevent false triggering on high in-rush current loads. n Solenoid Drivers The LTC1255 operates from 9V to 24V supplies and is n DC Motor Drivers well suited for industrial and automotive applications. n Stepper Motor Drivers n Lamp Drivers/Dimmers The LTC1255 is available in both an 8-pin DIP and an n Relay Drivers 8-pin SOIC. n Low Frequency H-Bridge n P-Channel Switch Replacement TYPICAL APPLICATI Dual 24V High-Side Switch with Overcurrent Protection Standby Supply Current 24V 50 + V = V = 0V IN1 IN2 45 10F T = 25C A 0.036 0.036 40 V S DS1 DS2 35 30 IRLR024 LTC1255 IRLR024 G1 G2 25 IN1 IN2 12V 12V 20 GND 15 FROM FROM 10 24V/0.5A 24V/0.5A 1N4001 1N4001 P, ETC. P, ETC. SOLENOID SOLENOID 5 0 0 5 15 20 25 30 10 LTC1255 TA01 SUPPLY VOLTAGE (V) LTC1255 TA02 1 SUPPLY CURRENT (A) O U UO ULTC1255 ABSOLUTEXAI U RATI GS Supply Voltage ......................................... 0.3V to 30V Operating Temperature Range Transient Supply Voltage (< 10ms) ......................... 40V LTC1255C............................................... 0C to 70C Input Voltage ..................... (V + 0.3V) to (GND 0.3V) LTC1255I ........................................... 40C to 85C S Gate Voltage ...................... (V + 20V) to (GND 0.3V) Storage Temperature Range ................ 65C to 150C S Current (Any Pin)................................................. 50mA Lead Temperature (Soldering, 10 sec)................. 300C PACKAGE/ORDER I FOR ATIO ORDER PART ORDER PART TOP VIEW TOP VIEW NUMBER NUMBER DS1 1 DS2 8 DS1 1 8 DS2 GATE 1 2 7 GATE 2 GATE 1 2 7 GATE 2 LTC1255CS8 LTC1255CN8 GND 3 V 6 GND V S 3 6 S LTC1255IS8 LTC1255IN8 IN1 4 5 IN2 IN1 4 5 IN2 S8 PART MARKING N8 PACKAGE S8 PACKAGE 8-LEAD PLASTIC DIP 8-LEAD PLASTIC SOIC 1255 T = 100C, = 130C/ W T = 100C, = 150C/ W JMAX JA JMAX JA 1255I ELECTRICAL CHARACTERISTICS V = 9V to 24V, T = 25C, unless otherwise noted. S A SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS I Quiescent Current OFF V = 10V, V = 0V (Note 1) 12 40 A Q S IN V = 18V, V = 0V (Note 1) 12 40 A S IN V = 24V, V = 0V (Note 1) 12 40 A S IN Quiescent Current ON V = 10V, V = 22V, V = 5V (Note 2) 160 400 A S GATE IN V = 18V, V = 30V, V = 5V (Note 2) 350 800 A S GATE IN = 24V, V = 36V, V = 5V (Note 2) 600 1200 A V S GATE IN V Input High Voltage l2V INH V Input Low Voltage l 0.8 V INL I Input Current 0V V V l 1 A IN IN S C Input Capacitance 5pF IN V Drain Sense Threshold Voltage 80 100 120 mV SEN l 75 100 125 mV I Drain Sense Input Current 0V V V l 0.1 A SEN SEN S V V Gate Voltage Above Supply V = 9V l 7.5 10.5 12 V GATE S S I Gate Output Drive Current V = 18V, V = 30V l 520 A GATE S GATE V = 24V, V = 36V l 523 A S GATE 2 U WU U W W W