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LT1020IJ Datasheet(PDF) 11 Page - Linear Technology

Part # LT1020IJ
Description  Micropower Regulator and Comparator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1020IJ Datasheet(HTML) 11 Page - Linear Technology

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background image
11
LT1020
S
APPLICATI
TYPICAL
+
10
µF
0.001
µF
1M
50k
2
11
9
VOUT
FB
GND
LT1020
1020 TA13
INTERNAL PARASITIC
DIODES OF LT1020
GND
LT1020
1M
11
2
VOUT
5V
9
3
VIN
BATTERY
INPUT
VIN
3
MAIN
POWER
INPUT
FB
VOUT
VIN
VOUT
Battery Backup Regulator
5V Regulator with Shutdown
1020 TA15
5
6
1M
R2
1M
VOUT
0.001
µF
+
4
7
8
9
1M
10
µF
2
11
FB
VIN
3
REF
LT1020
0.047
µF
1M
13
DROP-
OUT
VOUT*
R1
1.5M
–
+
1.5M
VOUT TURNS OFF AT DROPOUT.
VOUT TURN ON WHEN:
VIN × R2
R1 + R2
= 2.5V
*
Turn-Off at Dropout
+
NC
10
µF
0.001
µF
1M
1M
5V
2
11
3
9
VIN
VOUT
FB
GND
LT1020
1020 TA14
TRANSISTOR USED BECAUSE OF LOW LEAKAGE
CHARACTERISTICS. TO TURN OFF THE OUTPUT
OF THE LT1020, FORCE FB (PIN 11) > 2.5V.
*
VIN > 5.2V
IQ = 40µA
100k
500k
2N3904*
LOGIC INPUT


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