LTC1982 - Single and Dual Micropower High Side Switch Controllers in SOT-23

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 components. Internal regulation circuitry allows quiescent current to drop to 10mA per driver (20mA for LTC1981) once the gates are charged.

Low quiescent current and low shutdown current (under 1mA) make these parts ideal for battery and other power constrained systems. The wide input voltage range accommodates 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.

Features
  • No External Components 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)
Typical Application
LTC1982 Typical Application
LTC1982 Typical Application
Applications
  • Cellular Telephones
  • Portable POS Terminal
  • Handheld Battery Powered Equipment
Packaging
LTC1982 Package Drawing
LTC1982 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC1982ES6#PBFSOT-23E$2.14
LTC1982ES6#TRMPBFSOT-23E$2.14$1.55
LTC1982ES6#TRPBFSOT-23E$2.14$1.50
Datasheet
Reliability Data
CAD Symbol
Related Products
LTC1981 - Single and Dual Micropower High Side Switch Controllers in SOT-23
R421 Reliability Data
LTC1982 Footprints and Symbols