LTC3834 PIN FUNCTIONS (FE/UFD) operation. Tying this pin to a voltage greater than 0.9V Exposed Pad (Pin 21/Pin 21): SGND. Must be soldered and less than INTVCC selects pulse-skipping operation. to the PCB. PHASMD (Pin 20/Pin 18): Control Input to Phase Selector which determines the phase relationships between TG and the CLKOUT signal. FUNCTIONAL DIAGRAM PLLIN/ MODE FIN PHASE DET INTVCC VIN PHASMD D BOOST B R PLLLPF LP CLP TG CB CLK DROP TOP OUT CIN OSCILLATOR D INTVCC DET BOT FC SW TOP ON 10k S Q CLKOUT – 0.88V SWITCH INTV R Q LOGIC CC + BG BOT PGOOD VFB1 – BURSTEN C PGND OUT B + 0.72V 0.4V + SLEEP VOUT – SHDN RSENSE L INTVCC – 0.5V – FC + ICMP IR + – PLLIN/MODE – – + + – BURSTEN – + 0.8V + 6mV 0.45V SENSE+ 2(VFB) SENSE– SLOPE COMP VFB R V B FB – TRACK/SS V EA IN + 0.80V RA VIN OV + 4.7V + 5.25V/ – – 7.5V 0.88V C EXTV I C CC LDO TH 0.5µA C R C2 C INTVCC 6V 1µA + TRACK/SS INTERNAL RUN SGND SUPPLY SHDN CSS 3834 FD 3834fc For more information www.linear.com/LTC3834 9 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Package Description Typical Application Related Parts
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