Wide VIN Range: 5.5V to 36V Operation
2-Phase Operation Reduces Input and Output Capacitance
Fixed Frequency, Peak Current Mode Control
Internal 10V LDO Regulator
Lower UVLO Thresholds Allows the Use of MOSFETs Rated at 6V VGS
Adjustable Slope Compensation Gain
Adjustable Max Duty Cycle (Up to 96%)
Adjustable Leading Edge Blanking
±1% Internal Voltage Reference
Programmable Operating Frequency with One External Resistor (75kHz to 500kHz)
Phase-Lockable Fixed Frequency 50kHz to 650kHz
SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or 12-Phase Operation (PHASEMODE Programmable)
24-Lead Narrow SSOP Package n 5mm × 5mm QFN Package with 0.65mm Lead Pitch n 24-Lead Thermally Enhanced TSSOP Package
Automotive, Telecom and Industrial Power Supplies
The LTC®3862-2 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. Multiphase 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.
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