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零件编号
产品描述 (功能)
LT1946 查看數據表(PDF) - Linear Technology
零件编号
产品描述 (功能)
比赛名单
LT1946
1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start
Linear Technology
LT1946 Datasheet PDF : 12 Pages
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TYPICAL APPLICATIO S
Low Profile, Triple Output TFT Supply (10V, –10V, 20V)
LT1946
V
IN
3.3V TO 5V
L1
5.4
µ
H
6
5
3
V
IN
SW
OFF ON SHDN
+
C1
4.7
µ
F
8
SS LT1946
7
COMP
2
FB
V
C
GND
C
SS
100nF
1
4
R
C
33.3k
C
C
470pF
C1 TO C6: X5R OR X7R
C1: 4.7
µ
F, 6.3V
C2: 2
×
10
µ
F, 10V
C3: 1
µ
F, 25V
C4: 2.2
µ
F, 10V
C5, C6: 0.1
µ
F, 10V
D1: MICROSEMI UPS120 OR EQUIVALENT
D2 TO D5: ZETEX BAT54S OR EQUIVALENT
L1: SUMIDA CDRH5D18-5R4
D1
C6
0.1
µ
F
D2
R1
75k
R2
10.5k
D3
C5
0.1
µ
F
C2
20
µ
F
V
ON
20V
5mA
AV
DD
10V
450mA, V
IN
= 5V
275mA, V
IN
= 3.3V
C3
1
µ
F
D4
C4
2.2
µ
F
D5
V
OFF
–10V
1946 TA01
10mA
Efficiency
90
85
V
IN
= 5V
80
V
IN
= 3.3V
75
70
65
60
55 V
ON
LOAD = 5mA
V
OFF
LOAD = 10mA
50
0
100 200 300 400 500
AV
DD
LOAD CURRENT (mA)
1946 TA01a
Transient Response
AV
DD
50mV/DIV
AC COUPLED
I
LI
0.5A/DIV
AV
DD
150mA
LOAD 100mA
V
IN
= 5V
100
µ
s/DIV
1946 TA01b
1946fb
9
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