6
LTC3410
3410fb
UU
U
PI FU CTIO S
RUN (Pin 1): 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.
GND (Pins 2, 5): Ground Pin.
SW (Pin 3): Switch Node Connection to Inductor. This pin
connects to the drains of the internal main and synchro-
nous power MOSFET switches.
V
IN
(Pin 4): Main Supply Pin. Must be closely decoupled
to GND, Pin 2, with a 2.2µF or greater ceramic capacitor.
V
FB
(Pin 6 Adjustable Version ): Feedback Pin. Receives
the feedback voltage from an external resistive divider
across the output.
V
OUT
(Pin 6 Fixed Voltage Versions): Output Voltage
Feedback Pin. An internal resistive divider divides the
output voltage down for comparison to the internal refer-
ence voltage.
FU CTIO AL DIAGRA
U
U
W
+
–
+
–
+
–
EA
+
–
I
RCMP
+
–
I
COMP
6
1
RUN
OSC
SLOPE
COMP
OSC
FREQ
SHIFT
0.8V
R1*
R2
240k
0.8V REF
SHUTDOWN
0.4V
0.65V
SLEEP
V
IN
V
FB
/V
OUT
EN
BURST
V
IN
S
R
RS LATCH
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
ANTI-
SHOOT-
THRU
Q
Q
5Ω
4
SW
3
5
GND
3410 BD
2
*R1 = 240k – 1
V
OUT
0.8
()
