317B 查看數據表（PDF） - Linear Technology
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317B Datasheet PDF : 16 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LT1317/LT1317B
Quiescent Current, SHDN = 0V
26
25
24
23
22
21
20
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1317 TPC10
5V Output Efficiency, Circuit of
Figure 1 (LT1317)
90
FB Pin Bias Current
40
36
32
28
24
20
16
12
8
4
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1317 TPC11
2-Cell to 3.3V Converter
Efficiency (LT1317B)
90
SHDN Pin Current
2
1
0
–1
–2
–3
0
1
2
3
4
5
6
SHDN PIN VOLTAGE (V)
1317 TPC12
2-Cell to 5V Converter Efficiency
(LT1317B)
90
80
80
80
70
70
70
60
VIN = 1.65V
VIN = 2.2V
50
VIN = 3V
0.3 1
10
100
LOAD CURRENT (mA)
1000
1317 TPC13
60
50
40
1
VIN = 1.65V
VIN = 2.2V
VIN = 3V
10
100
LOAD CURRENT (mA)
1000
1317 TPC14
60
50
40
1
VIN = 1.65V
VIN = 2.2V
VIN = 3V
10
100
LOAD CURRENT (mA)
1000
1317 TPC15
Transient Response (LT1317)
VOUT
100mV/DIV
AC COUPLED
IL
200mA/DIV
Transient Response (LT1317B)
VOUT
100mV/DIV
AC COUPLED
IL
200mA/DIV
Burst Mode Operation (LT1317)
VOUT
50mV/DIV
AC COUPLED
IL
200mA/DIV
ILOAD
165mA
5mA
VIN = 2V
1ms/DIV
VOUT = 3.3V
CIRCUIT OF FIGURE 1
1317 TPC16
ILOAD
165mA
5mA
VIN = 2V
1ms/DIV
VOUT = 3.3V
CIRCUIT OF FIGURE 1
WITH LT1317B
1317 TPC17
VSW
5V/DIV
VIN = 2V
20µs/DIV
VOUT = 3.3V
ILOAD = 30mA
CIRCUIT OF FIGURE 1
1317 TPC18
5
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