LTC1155 Dual High Side Micropower MOSFET Driver FEATURES DESCRIPTION n The LTC 1155 dual high side gate driver allows using low Fully Enhances N-Channel Power MOSFETs n cost N-channel FETs for high side switching applications. 8A Standby Current n An internal charge pump boosts the gate above the posi- 85A ON Current n tive rail, fully enhancing an N-channel MOSFET with no Short-Circuit Protection n external components. Micropower operation, with 8A Wide Power Supply Range: 4.5V to 18V n standby current and 85A operating current, allows use Controlled Switching ON and OFF Times n in virtually all systems with maximum efficiency. No External Charge Pump Components n Replaces P-Channel High Side MOSFETs Included on-chip is overcurrent sensing to provide au- n Compatible with Standard Logic Families tomatic shutdown in case of short circuits. A time delay n Available in 8-Pin SO Package can be added in series with the current sense to prevent false triggering on high in-rush loads such as capacitors and incandescent lamps. APPLICATIONS The LTC1155 operates off of a 4.5V to 18V supply input and n Laptop Power Bus Switching safely drives the gates of virtually all FETs. The LTC1155 n SCSI Termination Power Switching is well suited for low voltage (battery-powered) applica- n Cellular Phone Power Management tions, particularly where micropower sleep operation n P-Channel Switch Replacement is required. n Relay and Solenoid Drivers n The LTC1155 is available in both 8-pin PDIP and 8-pin Low Frequency Half H-Bridge n SO packages. Motor Speed and Torque Control All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION Laptop Computer Power Bus Switch with Short-Circuit Protection V = 4.5V TO 5.5V S + Switch Voltage Drop C C R R DLY DLY SEN SEN 10F 0.02 0.1F 0.1F 0.02 0.25 R R DLY DLY 100k 100k DS1 V DS2 S 0.20 *IRLR034 *IRLR034 G1 LTC1155 G2 0.15 5A 5A MAX MAX IN1 TTL, CMOS INPUT TTL, CMOS INPUT GND IN2 0.10 POWER BUS 0.05 P DISK PRINTER, 0.00 SYSTEM DISPLAY DRIVE ETC. 0 1 2 3 OUTPUT CURRENT (A) GND 1155 TA02 1155 TA01 *SURFACE MOUNT Rev. C 1 Document Feedback For more information www.analog.com VOLTAGE DROP (V)LTC1155 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage ..........................................................22V Operating Temperature Range Input Voltage ........................(V +0.3V) to (GND 0.3V) LTC1155C ................................................ 0C to 70C S Gate Voltage ..........................(V +24V) to (GND 0.3V) LTC1155I ............................................ 40C to 85C S Current (Any Pin) ...................................................50mA LTC1155M (OBSOLETE) ................... 55C to 125C Storage Temperature Range .................. 65C to 150C Lead Temperature Range (Soldering, 10 sec.) ...... 300C PIN CONFIGURATION TOP VIEW TOP VIEW TOP VIEW DS1 1 8 DS2 DS1 1 8 DS2 DS1 1 8 DS2 G1 2 7 G2 G1 2 7 G2 G1 2 7 G2 GND 3 6 V S GND 3 6 V GND 3 6 V S S IN1 4 5 IN2 IN1 4 5 IN2 IN1 4 5 IN2 J8 PACKAGE 8-LEAD CERDIP N8 PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO T = 150C, = 100C/W (J8) JMAX JA T = 100C, = 130C/W (N8) T = 100C, = 150C/W JMAX JA JMAX JA OBSOLETE PACKAGE ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1155CN8 PBF LTC1155CN8 TRPBF 8-Lead PDIP 0C to 70C LTC1155IN8 PBF LTC1155IN8 TRPBF 8-Lead PDIP 40C to 85C OBSOLETE PACKAGE LTC1155CJ8 PBF LTC1155CJ8 TRPBF 8-Lead CERDIP 0C to 70C LTC1155MJ8 PBF LTC1155MJ8 TRPBF 8-Lead CERDIP 55C to 125C LTC1155CS8 PBF LTC1155CS8 TRPBF 1155 8-Lead Plastic SO 0C to 70C LTC1155IS8 PBF LTC1155IS8 TRPBF 1155I 8-Lead Plastic SO 40C to 85C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. C 2 For more information www.analog.com