LTC3862 Datasheet | Linear Technology

Features n Wide VIN Range: 4V to 36V Operation n 2-Phase Operation Reduces Input and Output Capacitance n Fixed Frequency, Peak Current Mode Control n 5V Gate Drive for Logic-Level MOSFETs n Adjustable Slope pensation Gain n Adjustable Max Duty Cycle (Up to 96%) n Adjustable Leading Edge Blanking n ±1% Internal Voltage Reference n Programmable Operating Frequency with One External Resistor (75k Hz to 500k Hz) n Phase-Lockable Fixed Frequency 50k Hz to 650k Hz n SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or 12-Phase Operation (PHASEMODE Programmable) n Internal 5V LDO Regulator n 24-Lead Narrow SSOP Package n 5mm × 5mm QFN with 0.65mm Lead Pitch and 24-Lead Thermally Enhanced TSSOP Packages Applications n Automotive, Tele and Industrial Power Supplies Multi-Phase Current Mode Step-Up DC/DC Controller Description The LTC®3862 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 75k Hz to 500k Hz 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. PART NUMBER LTC3862 LTC3862-1 LTC3862-2 INTVCC 5V 10V 10V VIN ON 3.3V 7.5V 4.4V VIN OFF 2.9V 7.0V 3.9V L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6144194, 6498466, 6611131. Typical Application 84.5k 24.9k GATE1 INTV...