LT1120AC データシートの表示（PDF） - Linear Technology
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LT1120AC Datasheet PDF : 8 Pages
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TYPICAL APPLICATIO S
LT1120A
Regulator with Output Voltage Monitor
5V
LOGIC
OUTPUT
LOGIC
500k
7
LOGIC OUTPUT GOES LOW WHEN
VOUT DROPS BY 100mV
5
VIN
4
OUTPUT
LT1120A
8
FEEDBACK 2
REF
GND
6
1
0.001µF 98k
2k
OUTPUT
5V
10µF
VOUT
PIN 7
LOGIC OUTPUT
100k
1120A TA03
Compensating the Comparator as an Op Amp
VREF 6 +
–
R2
1M
IN
C2
50µA
7
AT AV = 100,
SLEW RATE = +0.05V/µs
– 6V/µs
R1
C1
AV R1
C1
C2 R2
–1 33Ω 0.1µF 0.001µF 1M
–10 100Ω 0.047µF – 100k
–100 10k 0.002µF
–
10k
1120A TA04
Current Limited 1 Amp Regulator
2.2k
5
VIN
VOUT 4
LT1120A FB 2
MJE2955
0.22µF 1M
0.5Ω*
VIN
2N3906*
VOUT
5V AT 1A
220µF†
GND
1
270Ω
100k
* SETS CURRENT
LIMIT BUT INCREASES
DROPOUT VOLTAGE
BY 0.5V.
† MUST HAVE LOW
ESR. SEVERAL 100µF
CAPACITORS CAN BE
PARALLELED.
1120A TA06
Battery Backup Regulator
BATTERY
INPUT
5 VIN
VOUT 4
LT1120A
GND FB 2
1
0.001µF
VOUT
5V
1M
10µF
50k
4 VOUT
VIN 5
LT1120A
2 FB GND
1
MAIN
POWER
INPUT
1M
INTERNAL PARASITIC
DIODES OF LT1120A
VIN
VOUT
1120A TA05
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
1120afa
7
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