LTC3407-2 Linear Technology, LTC3407-2 Datasheet - Page 5

• Manufacturer Part Number: LTC3407-2
• Description: 2.25MHz Step-Down DC/DC Regulator
• Manufacturer: Linear Technology

PI FU CTIO S
V
voltage from the external resistive divider across the
output. Nominal voltage for this pin is 0.6V.
RUN1 (Pin 2): Regulator 1 Enable. Forcing this pin to V
enables regulator 1, while forcing it to GND causes regu-
lator 1 to shut down.
V
to GND.
SW1 (Pin 4): Regulator 1 Switch Node Connection to the
Inductor. This pin swings from V
GND (Pin 5): Main Ground. Connect to the (–) terminal of
C
MODE/SYNC (Pin 6): Combination Mode Selection and
Oscillator Synchronization. This pin controls the operation
of the device. When tied to V
operation or pulse skipping mode is selected, respec-
tively. Do not float this pin. The oscillation frequency can
FB1
IN
OUT
U
(Pin 3): Main Power Supply. Must be closely decoupled
, and (–) terminal of C
(Pin 1): Output Feedback. Receives the feedback
U
U
IN
.
IN
IN
or GND, Burst Mode
to GND.
IN
be syncronized to an external oscillator applied to this pin
and pulse skipping mode is automatically selected.
SW2 (Pin 7): Regulator 2 Switch Node Connection to the
Inductor. This pin swings from V
POR (Pin 8): Power-On Reset . This common-drain logic
output is pulled to GND when the output voltage is not
within ±8.5% of regulation and goes high after 117ms
when both channels are within regulation.
RUN2 (Pin 9): Output Feedback. Forcing this pin to V
enables regulator 2, while forcing it to GND causes regu-
lator 2 to shut down.
V
voltage from the external resistive divider across the
output. Nominal voltage for this pin is 0.6V.
Exposed Pad (GND) (Pin 11): Power Ground. Connect to
the (–) terminal of C
connected to electrical ground on PCB.
FB2
(Pin 10): Output Feedback. Receives the feedback
OUT
, and (–) terminal of C
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IN
LTC3407-2
to GND.
IN
sn34072 34072fs
. Must be
5
IN