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コンポーネント説明
LT1020 データシートの表示(PDF) - Linear Technology
部品番号
コンポーネント説明
メーカー
LT1020
Micropower Regulator and Comparator
Linear Technology
LT1020 Datasheet PDF : 16 Pages
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LT1020
TYPICAL APPLICATI S
Battery Backup Regulator
BATTERY
INPUT
3
V
IN
LT1020
GND
9
2
V
OUT
11
FB
0.001
µ
F
V
OUT
5V
2
V
OUT
1M
10
µ
F
LT1020
11
FB
GND
50k
9
3
V
IN
MAIN
POWER
INPUT
INTERNAL PARASITIC
DIODES OF LT1020
1M
V
IN
V
OUT
1020 TA13
5V Regulator with Shutdown
V
IN
> 5.2V
I
Q
= 40
µ
A
3
V
IN
LT1020
2
V
OUT
GND FB
9
11 100k
0.001
µ
F
5V
10
µ
F
NC
1M
500k
2N3904*
* TRANSISTOR USED BECAUSE OF LOW LEAKAGE
1M
CHARACTERISTICS. TO TURN OFF THE OUTPUT
OF THE LT1020, FORCE FB (PIN 11) > 2.5V.
LOGIC INPUT
1020 TA14
Turn-Off at Dropout
V
IN
3
R1
1.5M
9
5
6
1M
* V
OUT
TURNS OFF AT DROPOUT.
V
OUT
TURN ON WHEN:
V
IN
×
R2
= 2.5V
R1 + R2
R2
1M
8
2
V
OUT
LT1020
DROP-
OUT
7 13
11
FB
REF
4
1.5M
0.047
µ
F
0.001
µ
F 1M
1M
V
OUT
*
10
µ
F
1020 TA15
11
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