Datasheet

7
LTC3564
3564f
V
FB
(Pin 1/Pin 4) : Feedback Pin. Receives the feedback
voltage from an external resistive divider across the out-
put.
GND (Pin 2/NA): Ground Pin.
V
IN
(Pin 3/Pin 3): Main Supply Pin. Must be closely
decoupled to GND, Pin 2, with a 10μF or greater ceramic
capacitor.
SW (Pin 4/Pin 1): Switch Node Connection to Inductor.
This pin connects to the drains of the internal main and
synchronous power MOSFET switches.
RUN (Pin 5/Pin 6): Run Control Input. Forcing this pin
above 1.5V enables the part. Forcing this pin below 0.3V
shuts down the device. In shutdown, all functions are
disabled drawing <1μA supply current. Do not leave RUN
floating.
PGND (NA/Pin 2): Main Power Ground Pin. Connect to the
(–) terminal of C
OUT
, and (–) terminal of C
IN
.
SGND (NA/Pins 5, 7): The Signal Ground Pin. All small
signal components and compensation components should
be connected to this ground (see Board Layout Consider-
ations.)
PI FU CTIO S
UUU
(S5/DCB)
FU CTIO AL DIAGRA
UU
W
+
–
+
–
+
–
EA
+
–
I
RCMP
+
–
I
COMP
RUN
OSC
SLOPE
COMP
OSC
FREQ
SHIFT
0.6V
0.6V REF
SHUTDOWN
0.52V
0.65V
SLEEP
V
IN
V
FB
BURST
V
IN
S
R
RS LATCH
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
ANTI-
SHOOT-
THRU
Q
Q
R
SENSE
SW
GND
3564 FD