LTC3862EGN#PBF

LTC3862 is a two phase constant frequency, current mode boost and SEPIC controller that drives N-channel power MOSFETs. Two phase operation reduces system filtering capacitance and inductance requirements. 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 5V 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. It is used in applications such as automotive, telecom and industrial power supplies etc.

• VIN supply voltage range is 4V to 36V
• Fixed frequency, peak current mode control
• 5V gate drive for logic-level MOSFETs, adjustable slope compensation gain
• Adjustable max duty cycle (upto 96%), adjustable leading edge blanking
• ±1% internal voltage reference, internal 5V LDO regulator
• INTVCC is 5V, VIN ON is 3.3V, VIN OFF is 2.9V
• VIN supply current is 1.8mA typical at (TA = 25°C, VIN = 12V, RUN = 2V)
• Shutdown mode is 30µA typical at (VRUN = 0V, TA = 25°C, VIN = 12V, RUN = 2V)
• Operating temperature is -40°C to 85°C
• Package style is 24-lead plastic SSOP

Merknader

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