Ultralow Power Boost Converter with Output Disconnect

The LT8410/LT8410-1 are ultralow power boost converters with integrated power switch, Schottky diode and output disconnect circuitry. The parts control power delivery by varying both the peak inductor current and switch off-time. This control scheme results in low output voltage ripple as well as high efficiency over a wide load range. The quiescent current is a low 8.5μA, which is further reduced to 0μA in shutdown. The internal disconnect circuitry allows the output voltage to be blocked from the input during shutdown. High value (12.4M/0.4M) resistors are integrated on chip for output voltage detection, significantly reducing input referred quiescent current. The LT8410/LT8410-1 also features a comparator built into the SHDN pin, over voltage protection for the CAP and VOUT pins, built in soft-start and comes in a tiny 8-pin 2mm × 2mm DFN package.

Applications

* Sensor Power

* RF Mems Relay Power

* General Purpose Bias

* Ultralow Quiescent Current

* 8.5μA in Active Mode

* 0μA in Shutdown Mode

* Comparator Built into SHDN pin

* Low Noise Control Scheme

* Adjustable FB reference voltage

* Wide Input Range: 2.5V to 16V

* Wide Output Range: Up to 40V

* Integrated Power NPN Switch

* 25mA Current Limit (LT8410)

* 8mA Current Limit (LT8410-1)

* Integrated Schottky Diode

* Integrated Output Disconnect

* High Value (12.4M/0.4M) Feedback Resistors Integrated

* Built in Soft-Start (Optional Capacitor from VREF to GND)

* Overvoltage Protection for CAP and VOUT pins

* Tiny 8-Pin 2mm × 2mm DFN package