Datasheet LTC3823 (Analog Devices) - 9

LTC3823
FUNCTIONAL DIAGRAM
R V ON OUT PLLFLTR VIN + VON ION FCB INTV V CC IN CIN 0.6V 4.8V 1μA 5V REG R V Z INSNS VCC R 0.6V Z0 PLL-SYNC INTV R – + Z1/SS CC ENABLE Z2 F BOOST V PLLIN VON tON = (10pF) R IION TG CB S Q FCNT M1 SW ON SWITCH 20k + + LOGIC AND SENSE+ D L1 B I ANTI- CMP IREV VOUT SHOOT – – THROUGH SENSE– + COUT RUN DRVCC 2.0V BG OV VRNG M2 (0.5~2) FOLDBACK CVCC R DISABLED SENSE (OPTIONAL) AT START-UP PGND 0.5V + 0.25V SW FOLDBACK 3.3μA SENSE+ – PGOOD BG M2 SENSE– 1 240k PGND – *CONNECTION W/O Q2 Q4 R2 OV V (EXT) SENSE RESISTOR I FB THB Q6 + R1 SGND (EXT) Q1 – 40k UV + V – OUTSENSE 40k – SS RUN INTVCC – + – + V + OUTSENSE 40k EA 1.7μA + + + – 0.5V 1.5V 40k 0.6V C C V I C1 SS DIFFOUT TH R RUN TRACK/SS C 3823 FD EXTERNAL TO CHIP 3823fd 9