LTC3835 PIN FUNCTIONS (FE Package/UFD Package) operation. Tying this pin to INTVCC forces continuous PHASMD (Pin 20/Pin 18): Control Input to Phase Selector inductor current operation. Tying this pin to a voltage which determines the phase relationships between TG and greater than 0.9V and less than INTVCC selects pulse- the CLKOUT signal. skipping operation. 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 – + SENSE+ 0.8V + 6mV 0.45V 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 0.5µA TH C R C2 C INTVCC 6V 1µA TRACK/SS + INTERNAL RUN SUPPLY SGND CSS SHDN 3835 FD Rev. F For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
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