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LQH32CN4R7M23 Datasheet(PDF) 6 Page - Linear Integrated Systems

Part # LQH32CN4R7M23
Description  Dual Monolithic 300mA Synchronous Step-Down Regulaor
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Manufacturer  LINEAR [Linear Integrated Systems]
Direct Link  http://www.linearsystems.com
Logo LINEAR - Linear Integrated Systems

LQH32CN4R7M23 Datasheet(HTML) 6 Page - Linear Integrated Systems

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LTC3547
6
3547fa
PI FU CTIO S
VFB1 (Pin 1): Regulator 1 Output Feedback. Receives
the feedback voltage from the external resistor divider
across the regulator 1 output. Nominal voltage for this
pin is 0.6V.
RUN1 (Pin 2): Regulator 1 Enable. Forcing this pin to
VIN enables regulator 1, while forcing it to GND causes
regulator 1 to shut down.
VIN (Pin 3): Main Power Supply. Must be closely decou-
pled to GND.
SW1 (Pin 4): Regulator 1 Switch Node Connection to the
Inductor. This pin swings from VIN to GND.
GND (Pin 5): Ground. Connect to the (–) terminal of COUT,
and the (–) terminal of CIN.
SW2 (Pin 6): Regulator 2 Switch Node Connection to
the Inductor. This pin swings from VIN to GND.
RUN2 (Pin 7): Regulator 2 Enable. Forcing this pin to
VIN enables regulator 2, while forcing it to GND causes
regulator 2 to shut down.
VFB2 (Pin 8): Regulator 2 Output Feedback. Receives
the feedback voltage from the external resistor divider
across the regulator 2 output. Nominal voltage for this
pin is 0.6V.
Exposed Pad (Pin 9): Electrically Connected to GND.
Must be soldered to the PCB for optimum thermal
performance.
+
+
EA
+
VSLEEP
ITH
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
S
R
Q
Q
RS
LATCH
BURST
ICOMP
IRCMP
ANTI
SHOOT-
THRU
SLOPE
COMP
SLEEP
0.6V REF
OSC
OSC
REGULATOR 2 (IDENTICAL TO REGULATOR 1)
SLEEP1
SLEEP2
SHUTDOWN
REGULATOR 1
SW1
SW2
5
3547 FD
1
2
7
8
RUN1
RUN2
VFB2
VFB1
4
VIN
3
GND
5
6
0.6V
BURST
CLAMP
SOFT-START
FUNCTIONAL DIAGRAM


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