Datasheet LTC3606B (Analog Devices) - 6

LTC3606B
PIN FUNCTIONS GND (Pins 1, 3, Exposed Pad Pin 9):
Ground. Connect to
PGOOD (Pin 6):
Open-Drain Logic Output. PGOOD is pulled the (–) terminal of COUT, and the (–) terminal of CIN. The to ground if the voltage on the VFB pin is not within power Exposed Pad must be soldered to PCB. good threshold.
RLIM (Pin 2):
Average Input Current Limit Program Pin.
RUN (Pin 7):
Regulator Enable. Forcing this pin to VIN Place a resistor and capacitor in parallel from this pin to enables regulator, while forcing it to GND causes regulator ground. to shut down.
SW (Pin 4):
Regulator Switch Node Connection to the
VFB (Pin 8):
Regulator Output Feedback. Receives the Inductor. This pin swings from VIN to GND. feedback voltage from the external resistive divider
V
across the regulator output. Nominal voltage for this pin
IN (Pin 5):
Main Power Supply. Must be closely de- coupled to GND. is 0.6V.
FUNCTIONAL DIAGRAM
+ 2 RLIM RUN 7 0.6V REF OSC OSC – 1V MIN CLAMP 5 V SLOPE IN COMP – I VFB 8 – TH EA – SLEEP + – + I 0.6V COMP VSLEEP + S Q RS LATCH SOFT-START R Q + SWITCHING ICOMP LOGIC AND – – BLANKING ANTI 0.654V CIRCUIT SHOOT- + THRU 4 SW V PGOOD 6 FB – + 0.546V + IRCMP – 9 GND SHUTDOWN 3606B FD 3606bfb 6