LTC3868 FUNCTIONAL DIAGRAM INTVCC VIN DUPLICATE FOR SECOND BOOST + CONTROLLER CHANNEL PGOOD1 0.88V PHASMD 24, 17 DB CLKOUT 27 – 3 4 V TG FB1 C + 26, 15 B DROP TOP OUT C – IN D 0.72V DET BOT SW 25, 16 TOP ON + PGOOD2 S Q 0.88V 14 – INTV R Q CC BG V SWITCH FB2 23, 18 SHDN + LOGIC BOT – C 0.72V PGND OUT FREQ 20µA 21 VOUT 2 VCO CLK2 + R CLK1 0.425V SENSE SLEEP L – ICMP IR – PFD + CLP + – – + + – SENSE+ 3mV 32, 10 SYNC 2.7V PLLIN/MODE DET 0.55V SENSE– 5 1, 9 100k SLOPE COMP VFB ILIM 31, 11 CURRENT + RB 28 LIMIT EA – 0.80V VIN TRACK/SS RA 22 + EXTV OV CC – I 0.88V TH CC 20 30, 12 5.1V 5.1V 0.5µA SHDN CC2 RC LDO LDO RST FOLDBACK EN EN 2(VFB) SS + 1µA 29, 13 – 4.7V 11V SHORT CKT SHDN C RUN SS LATCH-OFF 6 SGND 19 INTVCC 7, 8 10µA 3868 FD 3868fe 10 For more information www.linear.com/LTC3868 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Operation Package Description Typical Application Related Parts
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