Datasheet LTC3858-2 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Low IQ, Dual 2-Phase Synchronous Step-Down Controller |
| Pages / Page | 40 / 10 — FUNCTIONAL DIAGRAM |
| File Format / Size | PDF / 448 Kb |
| Document Language | English |
FUNCTIONAL DIAGRAM
Model Line for this Datasheet
Text Version of Document
LTC3858-2
FUNCTIONAL DIAGRAM
OUTV INC OUTC SENSER D CR INV L B B B D C R C C2 SS C C CC A C R INTV 38582 FD + – TG FB SW BG 21 1, 9 V I TH SS BOOST 24, 17 26, 15 25, 16 23, 18 PGND SENSE 32, 10 SENSE 31, 11 30, 12 29, 13 CC 1μA INTV TOP BOT 0.80V TRACK/SS 0.88V + – + – EA SWITCH LOGIC SHDN IR BOT + – OV SLEEP – TOP ON SHDN + 3mV + – DROP OUT DET + FOLDBACK Q Q – – + 0.425V ) S R RST FB ICMP SHDN 2(V 2.7V SLOPE COMP 0.55V 0.5μA 11V RUN 7, 8 DUPLICATE FOR SECOND CONTROLLER CHANNEL 4 PFD CLKOUT CLK2 CLK1 CC 3 VCO INTV PHASMD LPC 5.1V LDO 19 LIMIT EN CURRENT FB1 FB2 V V SYNC DET 0.88V 0.72V 0.88V 0.72V + – + – + – + – SGND 6 5.1V LDO EN 100k 20μA + – CC 4.7V 27 14 2 5 IN 22 20 FREQ I LIM 28 V PGOOD1 PGOOD2 EXTV PLLIN/MODE 38582f 10
FUNCTIONAL DIAGRAM
OUTV INC OUTC SENSER D CR INV L B B B D C R C C2 SS C C CC A C R INTV 38582 FD + – TG FB SW BG 21 1, 9 V I TH SS BOOST 24, 17 26, 15 25, 16 23, 18 PGND SENSE 32, 10 SENSE 31, 11 30, 12 29, 13 CC 1μA INTV TOP BOT 0.80V TRACK/SS 0.88V + – + – EA SWITCH LOGIC SHDN IR BOT + – OV SLEEP – TOP ON SHDN + 3mV + – DROP OUT DET + FOLDBACK Q Q – – + 0.425V ) S R RST FB ICMP SHDN 2(V 2.7V SLOPE COMP 0.55V 0.5μA 11V RUN 7, 8 DUPLICATE FOR SECOND CONTROLLER CHANNEL 4 PFD CLKOUT CLK2 CLK1 CC 3 VCO INTV PHASMD LPC 5.1V LDO 19 LIMIT EN CURRENT FB1 FB2 V V SYNC DET 0.88V 0.72V 0.88V 0.72V + – + – + – + – SGND 6 5.1V LDO EN 100k 20μA + – CC 4.7V 27 14 2 5 IN 22 20 FREQ I LIM 28 V PGOOD1 PGOOD2 EXTV PLLIN/MODE 38582f 10
