LTC1156 Datasheet | Linear Technology

LTC1156 Quad High Side Micropower MOSFET Driver with Internal Charge Pump DESCRIPTIO The LTC1156 quad High side gate driver allows using low cost N-channel FETs for high side 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. Micropower operation, with 16µA standby current and 95µA operating current, allows use in virtually all systems with maximum efficiency. Included on chip is independent over-current 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 LTC1156 operates off of a 4.5V to 18V supply and is well suited for battery-powered applications, particularly where micropower “sleep” operation is required. The LTC1156 is available in both 16-pin DIP and 16-pin SOL packages. Features s s s s s s s s s No External Charge Pump ponents Fully Enhances N-Channel Power MOSFETs 16 Microamps Standby Current 95 Microamps ON Current Wide Power Supply Range 4.5V to 18V Controlled Switching ON and OFF Times Replaces P-Channel High Side Switches patible with Standard Logic Families Available in 16-pin SOL Package APPLICATI s s s s s s s Laptop puter Power Switching SCSI Termination Power Switching Cellular Telephone Power Management P-Channel Switch Replacement Battery Charging and Management Low Frequency H-Bridge Driver Stepper Motor and DC Motor Control TYPICAL APPLICATI 5V Laptop puter Power Management + 10µF VS VS DS1 DS2 DS3 DS4 G1 G2 G3 G4 GND GND 0.1µF 100k - 30mΩ SUPPLY CURRENT (µA) 5V Si9956DY HARD DISK DRIVE FLOPPY DISK DRIVE LTC1156 IN1 CONTROL LOGIC OR µP IN2 IN3 IN4 Si9956DY DISPLAY PERIPHERAL ALL PONENTS SHOWN ARE SURFACE MOUNT. MINIMUM PARTS COUNT SHOWN. CURRENT LIMITS CAN BE SET SEPARATELY AND TAILORED TO INDIVIDUAL LOAD CHARACTERISTICS. - IMS026 INTERNATIONAL MANUFACTURING...