LT1374IT7(RevA) 데이터 시트보기 (PDF) - Linear Technology
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LT1374IT7 Datasheet PDF : 28 Pages
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LT1374
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Voltage Drop
500
450
125°C
400
350
25°C
300
250
– 40°C
200
150
100
50
0
0
1
2
3
4
5
SWITCH CURRENT (A)
1374 G18
Shutdown Pin Bias Current
500
CURRENT REQUIRED TO FORCE SHUTDOWN
400 (FLOWS OUT OF PIN). AFTER SHUTDOWN,
CURRENT DROPS TO A FEW µA
300
200
8
AT 2.38V STANDBY THRESHOLD
(CURRENT FLOWS OUT OF PIN)
4
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1374 G04
Shutdown Supply Current
70
60
VIN = 25V
50
VIN = 10V
40
30
20
10
0
0
0.1
0.2
0.3
0.4
SHUTDOWN VOLTAGE (V)
1374 G07
Switch Peak Current Limit
6.5
6.0
TYPICAL
5.5
5.0
MINIMUM
4.5
4.0
3.5
3.0
0
20
40
60
80 100
DUTY CYCLE (%)
1374 G02
Standby and Shutdown Thresholds
2.40
STANDBY
2.36
Feedback Pin Voltage
2.430
2.425
2.420
2.415
2.410
– 50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1374 G03
Shutdown Supply Current
25
VSHDN = 0V
20
2.32
15
0.8
START-UP
0.4
SHUTDOWN
0
–50 –25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
1374 G05
10
5
0
0
5
10
15
20
25
INPUT VOLTAGE (V)
1374 G06
Error Amplifier Transconductance
2500
Error Amplifier Transconductance
3000
200
2000
PHASE
2500
150
1500
1000
2000
GAIN
( ) 1500 VFB 2 × 10–3
ROUT
200k
100
VC
COUT
12pF
50
500
0
–50 –25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
1374 G08
1000 ERROR AMPLIFIER EQUIVALENT CIRCUIT
0
RLOAD = 50Ω
500
100
1k
10k
100k
FREQUENCY (Hz)
–50
1M 10M
1374 G09
4
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