LT1308AIS8 Просмотр технического описания (PDF) - Linear Technology
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LT1308AIS8 Datasheet PDF : 20 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LT1308A/LT1308B
LT1308B
12V Output Efficiency
90
85
VIN = 5V
80
VIN = 3.3V
75
70
65
60
55
50
1
10
100
LOAD CURRENT (mA)
1000
1308A/B G04
SHDN Pin Bias Current vs Voltage
50
40
–40°C
30
25°C
85°C
20
10
0
0
2
4
6
8
10
SHDN PIN VOLTAGE (V)
1308 G07
Oscillator Frequency vs
Temperature
800
750
700
650
600
550
500
450
400
–50
–2.5 0 25 50
TEMPERATURE (°C)
75 100
1308 • G10
Switch Current Limit vs
Duty Cycle
4.0
3.5
3.0
2.5
2.0
0
20
40
60
80 100
DUTY CYCLE (%)
1308 • G05
FB, LBI Bias Current vs
Temperature
80
70
60
LBI
50
40
30
FB
20
10
0
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1308 • G08
LT1308A Quiescent Current vs
Temperature
180
170
160
150
140
130
120
110
100
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1308 • G11
Switch Saturation Voltage
vs Current
500
400
85°C
300
25°C
200
–40°C
100
0
0
0.5
1.0
1.5
2.0
SWITCH CURRENT (A)
1308 G06
Low Battery Detector Reference
vs Temperature
203
202
201
200
199
198
197
196
195
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1308 • G09
Feedback Pin Voltage vs
Temperature
1.25
1.24
1.23
1.22
1.21
1.20
1.19
1.18
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1308 • G12
1308abfb
5
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