Datasheet LTC1874 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Dual Constant Frequency Current Mode Step-Down DC/DC Controller |
| Pages / Page | 12 / 5 — FUNCTIONAL DIAGRA. Controller #1. Controller #2 |
| File Format / Size | PDF / 190 Kb |
| Document Language | English |
FUNCTIONAL DIAGRA. Controller #1. Controller #2
Model Line for this Datasheet
Text Version of Document
LTC1874
U U W FUNCTIONAL DIAGRA Controller #1
SENSE1– VIN1 1 2 + PVIN1 ICMP 16 – RS1 SWITCHING PGATE1 R LOGIC AND Q 15 BLANKING SLOPE S CIRCUIT PGND1 COMP OSC 14 – FREQ BURST OVP FOLDBACK + + CMP + 0.3V SHORT-CIRCUIT SLEEP V DETECT REF – – + 0.15V 60mV VIN EAMP VREF + 0.8V 0.5µA VFB1 + – 4 V V IN IN 0.3V – 0.35V + SHDN VOLTAGE VREF SHDN REFERENCE 0.8V CMP – UV GND1 3 UNDERVOLTAGE LOCKOUT 1.2V 13 ITH/RUN1 VIN2 SENSE2– 9 10
Controller #2
PVIN2 8 PGATE2 GND2 7 11 CONTROLLER #2 IS THE SAME AS CONTROLLER #1 PGND2 6 VFB2 12 1874FD 5 ITH/RUN2 5
U U W FUNCTIONAL DIAGRA Controller #1
SENSE1– VIN1 1 2 + PVIN1 ICMP 16 – RS1 SWITCHING PGATE1 R LOGIC AND Q 15 BLANKING SLOPE S CIRCUIT PGND1 COMP OSC 14 – FREQ BURST OVP FOLDBACK + + CMP + 0.3V SHORT-CIRCUIT SLEEP V DETECT REF – – + 0.15V 60mV VIN EAMP VREF + 0.8V 0.5µA VFB1 + – 4 V V IN IN 0.3V – 0.35V + SHDN VOLTAGE VREF SHDN REFERENCE 0.8V CMP – UV GND1 3 UNDERVOLTAGE LOCKOUT 1.2V 13 ITH/RUN1 VIN2 SENSE2– 9 10
Controller #2
PVIN2 8 PGATE2 GND2 7 11 CONTROLLER #2 IS THE SAME AS CONTROLLER #1 PGND2 6 VFB2 12 1874FD 5 ITH/RUN2 5
