LTC3564 LINER [Linear Technology], LTC3564 Datasheet - Page 7

• Manufacturer Part Number: LTC3564
• Description: 2.25MHz, 1.25A Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

V
voltage from an external resistive divider across the out-
put.
GND (Pin 2/NA): Ground Pin.
V
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.
PI FU CTIO S
FU CTIO AL DIAGRA
FB
IN
RUN
V
FB
U
U
(Pin 1/Pin 4) : Feedback Pin. Receives the feedback
(Pin 3/Pin 3): Main Supply Pin. Must be closely
0.6V REF
U
V
IN
U
SHUTDOWN
U
SHIFT
FREQ
OSC
0.6V
(S5/DCB)
+
–
EA
SLOPE
COMP
W
–
+
OSC
0.52V
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
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.)
RS LATCH
–
+
S
R
BURST
Q
Q
SLEEP
SWITCHING
BLANKING
CIRCUIT
LOGIC
AND
OUT
0.65V
, and (–) terminal of C
–
I
SHOOT-
COMP
ANTI-
THRU
I
RCMP
+
–
+
R
SENSE
LTC3564
IN
.
3564 FD
V
SW
GND
7
IN
3564f