Datasheet LTC3890 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller |
| Pages / Page | 40 / 10 — FUNCTIONAL DIAGRAM |
| File Format / Size | PDF / 935 Kb |
| Document Language | English |
FUNCTIONAL DIAGRAM
Text Version of Document
LTC3890
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 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 0.65V 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 – ITH 0.88V CC 20 30, 12 5.1V 5.1V 7µA (RUN1) 0.5µA (RUN2) SHDN C LDO LDO TRACK/SS C2 RC RST FOLDBACK 1µA 29, 13 EN EN 2(VFB) + 11V – SHDN CSS 4.7V RUN 33 SGND 19 INTVCC 7, 8 3890 FD 3890fc 10 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
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 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 0.65V 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 – ITH 0.88V CC 20 30, 12 5.1V 5.1V 7µA (RUN1) 0.5µA (RUN2) SHDN C LDO LDO TRACK/SS C2 RC RST FOLDBACK 1µA 29, 13 EN EN 2(VFB) + 11V – SHDN CSS 4.7V RUN 33 SGND 19 INTVCC 7, 8 3890 FD 3890fc 10 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
