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LTC3418 датащи(PDF) 6 Page - Linear Technology

номер детали LTC3418
подробное описание детали  8A, 4MHz, Monolithic Synchronous Step-Down Regulator
PDF  20 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC3418 датащи(HTML) 6 Page - Linear Technology

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6
LTC3418
3418f
PI FU CTIO S
VFB (Pin 25): Feedback Pin. Receives the feedback voltage
from a resistive divider connected across the output.
ITH (Pin 26): Error Amplifier Compensation Point. The
current comparator threshold increases with this control
voltage. Nominal voltage range for this pin is from 0.2V to
1.4V with 0.4V corresponding to the zero-sense voltage
(zero current).
SYNC/MODE (Pin 27): Mode Select and External Clock
Synchronization Input. To select Forced Continuous, tie to
SVIN. Connecting this pin to a voltage between 0V and 1V
selects Burst Mode operation with the burst clamp set to
the pin voltage.
TRACK (Pin 35): Voltage Tracking Input. Feedback voltage
will regulate to the voltage on this pin during start-up
power sequencing.
Exposed Pad (Pin 39): The Exposed Pad is PGND and
must be soldered to the PCB ground.
BLOCK DIAGRA
–
+
–
+
–
+
–
+
SLOPE
COMPENSATION
RECOVERY
OSCILLATOR
NMOS
CURRENT
COMPARATOR
CURRENT
REVERSE
COMPARATOR
SLOPE
COMPENSATION
LOGIC
ERROR
AMPLIFIER
BURST
COMPARATOR
PMOS CURRENT
COMPARATOR
PVIN
VOLTAGE
REFERENCE
35
TRACK
25
VFB
5
PGOOD
7
RUN/SS
RUN
0.74V
SYNC/MODE
0.86V
16
26
10
9
4
3
VREF
ITH
SYNC/MODE
BCLAMP
8
SGND
24
SVIN
+
22
1
2
11
12
20
21
30
31
23
28
29
SW
13
32
14
33
15
34
17
36
18
37
19
27
RT
6
38
PGND
3418 BD
–
+



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