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