LTC3862-1

The LTC®3862-1 is a two phase constant frequency, current mode boost and SEPIC controller that drives N-channel power MOSFETs. Two phase operation reduces system fi ltering capacitance and inductance requirements. The 10V gate drive is optimized for most automotive and industrial grade power MOSFETs.

Adjustable slope compensation gain of LTC3862-1 allows the user to fi netune the current loop gain, improving noise immunity.
The operating frequency can be set with an external resistor over a 75kHz to 500kHz range and can be synchronized to an external clock using the internal PLL. Multi-phase operation is possible using the SYNC input, the CLKOUT output and the PHASEMODE control pin allowing 2-, 3-, 4-, 6- or 12-phase operation.

Other features include an internal 10V LDO with undervoltage lockout protection for the gate drivers, a precision RUN pin threshold with programmable hysteresis, soft-start and programmable leading edge blanking and maximum duty cycle. The LTC3862 is a 5V gate drive version of the LTC3862-1.