LTC1982 Datasheet | Linear Technology

.. LTC1981/LTC1982 Single and Dual Micropower High Side Switch Controllers in SOT-23 DESCRIPTIO U Q1 1/2 Si6925DQ Q2 1/2 Si6925DQ 5 VCC LTC1981 GDR GND 2 SHDN 3 1 4 GATE LOAD Features s s s s s s s s s s No External ponents Required Internal Voltage Triplers Produce High Side Gate Drive for Logic Level FETs Ultralow Power: 10µA Per Driver ON Current (LTC1982) 20µA ON Current (LTC1981) <1µA Shutdown Current VCC Range: 1.8V to 5V Gate Drive Outputs Driven to Ground During Shutdown Gate Drive Outputs Internally Clamped to 7.5V Max “Gate Drive Ready” Output (LTC1981) Ultrasmall Application Circuit 5-Pin SOT-23 Package (LTC1981) 6-Pin SOT-23 Package (LTC1982) The LTC®1981/LTC1982 are low-power, self-contained N-channel MOSFET drivers. An internal voltage tripler allows gates to be driven without the use of any external ponents. Internal regulation circuitry allows quiescent current to drop to 10µA per driver (20µA for LTC1981) once the gates are charged. Low quiescent current and low shutdown current (under 1µA) make these parts ideal for battery and other power constrained systems. The wide input voltage range acmodates a variety of battery/input configurations. Gate drive is internally clamped to 7.5V providing protection to the external MOSFET gate. The MOSFETs can be driven in either high side or low side mode. The LTC1981 single driver version also includes a gate drive ready pin and twice the drive current capacity of the dual driver LTC1982. The LTC1981 is available in a 5-pin SOT-23. The LTC1982 is available in a 6-pin SOT-23. , LTC and LT are registered trademarks of Linear Technology Corporation. U APPLICATIO S s s s Cellular Telephones Portable POS Terminal Handheld Battery Powered Equipment TYPICAL APPLICATIONS Single High Side Switch Controller VCC 1.8V TO 5.0V 10µF + 100k GATE DRIVE READY SHDN Dual High Side Switch Controller VCC 1.8V TO 5.0V Q1 Si3442DV 10µF + 6 VCC SHDN 1 1 SHDN 1 1981/82 TA01 5 LTC1982 GND...