LTC3836 PIN FUNCTIONS (GN/UFD Package)BOOST1/BOOST2(Pins 27, 16)/(Pins 24, 13): Positive SENSE1+/SENSE2+ (Pins 28, 5)/(Pins 25, 12): Positive Supply Pin for the Gate Driver Circuitry. A bootstrapped Input to Differential Current Comparator. Also powers the capacitor, charged with an external Schottky diode and a gate drivers. Normally connected to the drain of the main boost voltage source, is connected between the BOOST external MOSFET. and SW pins. Voltage swing at the BOOST pins is from Exposed Pad(Pin 29) UFD Package Only: Must be sol- boost source voltage (typically VIN) to this boost source dered to PCB ground. voltage + VIN. FUNCTIONAL DIAGRAM (Common Circuitry) RVIN VIN (TO CONTROLLER 1, 2) VIN CVIN UNDERVOLTAGE VOLTAGE 0.6V LOCKOUT REFERENCE VREF 0.65μA SHDN RUN/SS tSEC = 1ms + EXTSS INTSS – SYNC/FCB SYNC DETECT PHASE DETECTOR PLLLPF CLK1 VOLTAGE SLOPE1 SLOPE CONTROLLED CLK2 COMP OSCILLATOR SLOPE2 – – VFB1 UV1 FCB FCB PGOOD OV1 + + 0.6V SHDN 0.54V + OV2 37362 FD UV2 VFB2 – 3836fb 7 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY RELATED PARTS
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