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LT3487 датащи(PDF) 13 Page - Linear Technology

номер детали LT3487
подробное описание детали  Boost and Inverting Switching Regulator for CCD Bias
PDF  16 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT3487 датащи(HTML) 13 Page - Linear Technology

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LT3487
13
3487f
TYPICAL APPLICATIO
VPOS Load Step Response
VNEG Load Step Response
+15V and –8V Boost and Inverting CCD Bias
SWN
L2
15
µH
L1
10
µH
VIN
CAP
R1
549k
FBP
VPOS
VBAT
LT3487
GND
SWP
DN
L3
15
µH
R2 324k
C7 47pF
FBN
RUN/SS
RUN/SS
VNEG
–8V
90mA
C6
100nF
C4
4.7
µF
3487 TA02a
C5
100nF
VPOS
15V
45mA
C1
1
µF
C2
2.2
µF
C3
22
µF
VIN
3V TO 12V
C1: TAIYO YUDEN EMK212BJ105MG
C2: TAIYO YUDEN TMK212BJ225MG
C3: TAIYO YUDEN TMK325BJ226MM
C4: TAIYO YUDEN TMK316BJ475ML-TR
L1: TOKO DB318C-A997AS-100M
L2, L3: SUMIDA CDRH2D18/HP-150NC
VPOS
100mV/DIV
AC-COUPLED
45mA
IPOS
15mA
100
µs/DIV
3487 TA02b
VIN = 3.6V
VNEG
20mV/DIV
AC-COUPLED
–50mA
INEG
–90mA
100
µs/DIV
3487 TA02c
VIN = 3.6V
The positive channel’s response is stable, but slightly
underdamped. A phase lead capacitor (C8) can be added
to provide more ideal phase margin.
VPOS Load Step Response (with Phase Lead Capacitor)
VPOS
100mV/DIV
AC-COUPLED
45mA
IPOS
15mA
100
µs/DIV
3487 TA02d
VIN = 3.6V
CAP
R2
549k
C8
10pF
FBP
3487 TA02e



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