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3509 Просмотр технического описания (PDF) - Linear Technology
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Список матч
3509
Dual 36V, 700mA Step-Down Regulator
Linear Technology
3509 Datasheet PDF : 24 Pages
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BLOCK DIAGRAM
LT3509
V
IN
C1
COMMON
CIRCUITRY
OVERVOLTAGE
DETECT
RUN/SS1
C3
RUN/SS2
SHUTDOWN
AND
SOFT-START
CONTROL
C2
V
REF
AND
CORE
VOLTAGE
REGULATOR
SYNC
RT
OSCILLATOR
R
T
1 OF 2 REGULATOR CHANNELS SHOWN
BD
BOOST
DIODE
V
C
–
SLOPE
MAIN CURRENT
COMPARATOR
SWITCH
LOGIC
BOOST
SWITCH
DRIVER
POWER
SWITCH
SW
DA CURRENT
COMPARATOR
–17mV
DA
ERROR
AMPLIFIER
V
REF
18m
Ω
0.8V
FB
CLAMP
GND
NOTE: THE BD PIN
IS COMMON TO
BOTH CHANNELS
C4
L1
D1
R1
V
OUT
C5
R2
3509 BD
Figure 1. Functional Block Diagram
3509fc
7
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