LT1611 Просмотр технического описания (PDF) - Linear Technology
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LT1611 Datasheet PDF : 12 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency, VOUT = – 5V
85
80
VIN = 5V
75
70
VIN = 3V
65
60
55
50
0 25 50 75 100 125 150
LOAD CURRENT (mA)
1611 G01
Switch VCESAT vs Switch Current
700
TA = 25°C
600
500
400
300
200
100
0
0 100 200 300 400 500 600 700
SWITCH CURRENT (mA)
1611 G04
Oscillator Frequency vs
Temperature
2.00
1.75
VIN = 5V
1.50
1.25
VIN = 1.5V
1.00
0.75
0.50
0.25
0
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1611 G07
VNFB vs Temperature
–1.245
–1.240
–1.235
–1.230
–1.225
–1.220
–1.215
–1.210
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1611 G02
SHDN Pin Bias Current vs VSHDN
50
40
30
20
10
0
0
1
2
3
4
5
SHDN PIN VOLTAGE (V)
1611 G05
No-Load Operating Quiescent
Current vs Temperature*
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1611 G08
LT1611
NFB Pin Bias Current vs
Temperature
6
5
4
3
2
1
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1611 G03
Switch Current Limit vs Duty Cycle
900
800 TA = 25°C
700
600
500
400
300
200
100
0
10 20 30 40 50 60 70 80
DUTY CYCLE (%)
1611 G06
Switch Current Limit vs
Temperature (Duty Cycle = 30%)
900
800
700
600
500
400
300
200
100
0
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
1611 G09
* Includes bias current through R1, R2 and Schottky leakage current at T ≥ 75°C
3
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