LTC3622 Dual Step-Down Regulator
Dual synchronous step-down DC/DC regulator with Burst Mode/pulse-skip control, external sync, 180 degree phase select, programmable current limit, and INTVCC LDO. 14-lead DFN.
Aliase:LTC3622EDE#PBF, LTC3622IDE#PBF, LTC3622HDE#PBF, LTC3622EDE#TRPBF, LTC3622IDE#TRPBF, LTC3622HDE#TRPBF, LTC3622EMSE#PBF, LTC3622IMSE#PBF, LTC3622HMSE#PBF, LTC3622EDE-2#PBF, LTC3622IDE-2#PBF, LTC3622HDE-2#PBF, LTC3622EMSE-2#PBF, LTC3622IMSE-2#PBF, LTC3622HMSE-2#PBF, LTC3622EDE-23/5#PBF, LTC3622IDE-23/5#PBF, LTC3622HDE-23/5#PBF
DE (14-lead 3mm x 4mm DFN) Top View
15 Pins
Pinout Table15
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | VIN1 | Power | Input voltage of channel 1 step-down regulator; powers INTVCC LDO |
| 2 | PGOOD1 | Digital | Open drain power good indicator, channel 1 |
| 3 | MODE/SYNC | Digital | Burst Mode select (tie to INTVCC) or pulse-skip (tie to GND); external clock syn |
| 4 | PHASE | Digital | Phase select: GND for 0 deg, INTVCC for 180 deg channel shift |
| 5 | PGOOD2 | Digital | Open drain power good indicator, channel 2 |
| 6 | ILIM | Analog | Current limit select: GND full, INTVCC half, 1V channel 1 full / channel 2 half |
| 7 | VIN2 | Power | Input voltage of channel 2 step-down regulator |
| 8 | SW2 | Digital | Switch node to inductor of channel 2 |
| 9 | RUN2 | Digital | Logic RUN input for channel 2; do not leave floating |
| 10 | FB2 | Analog | Feedback input to channel 2 error amplifier |
| 11 | INTVCC | Power | Low dropout regulator output; bypass with at least 1uF ESR cap to ground |
| 12 | FB1 | Analog | Feedback input to channel 1 error amplifier |
| 13 | RUN1 | Digital | Logic RUN input for channel 1; do not leave floating |
| 14 | SW1 | Digital | Switch node to inductor of channel 1 |
| 15 | GND | Ground | Ground for power and signal; exposed pad must be soldered to PCB ground |