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LT8611 Datasheet(PDF) 6 Page - Linear Technology

Part # LT8611
Description  17V, 1A Synchronous Step-Down Regulator with 3.5關A Quiescent Current
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT8611 Datasheet(HTML) 6 Page - Linear Technology

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LTC3621/LTC3621-2
6
3621f
For more information www.linear.com/LTC3621
pin FuncTions (DFN/MSOP)
block DiagraM
SW (Pin 1/Pin 1): Switch Node Connection to the Inductor
of the Step-Down Regulator.
VIN(Pin2/Pin2):InputVoltageoftheStep-DownRegulator.
RUN (Pin 3/Pin 3): Logic Controlled RUN Input. Do not
leave this pin floating. Logic high activates the step-down
regulator.
FB (Pin 4/Pin 5): Feedback Input to the Error Amplifier
of the Step-Down Regulator. Connect a resistor divider
tap to this pin. The output voltage can be adjusted from
0.6V to VIN by:
VOUT = 0.6V • [1 + (R1/R2)]
PGOOD (Pin 4, MSOP Package Only): VOUT within Regu-
lation Indicator.
INTVCC(Pin5/Pin6):LowDropoutRegulator.Bypasswith
at least 1µF to Ground.
MODE (Pin 6/Pin 7): Burst Mode Select of the Step-Down
Regulator. Tie MODE to INTVCC for Burst Mode operation
with a 400mA peak current clamp, tie MODE to GND for
pulse skipping operation, and tie MODE to a voltage be-
tween 1V and VINTVCC – 1V for forced continuous mode.
GND (Exposed Pad Pin 7/Pin 9): Ground Backplane for
PowerandSignalGround.MustbesolderedtoPCBground.
SGND (Pin 8, MSOP Package Only): Signal Ground.
+
+
+
+
V
ERROR
AMPLIFIER
BURST
AMPLIFIER
MAIN
I-COMPARATOR
+
+
OVERCURRENT
COMPARATOR
REVERSE
COMPARATOR
0.6V
FB
MODE
RUN
PGOOD
INTVCC
CLK
VIN – 5V
SW
GND
3621 BD
VIN
INTVCC
OSCILLATOR
LDO
MS8E PACKAGE ONLY
BUCK
LOGIC
AND
GATE DRIVE
SLOPE
COMPENSATION
0.8ms
SOFT-START


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