LTC1771 データシートの表示（PDF） - Linear Technology
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LTC1771 Datasheet PDF : 16 Pages
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LTC1771
TYPICAL PERFOR A CE CHARACTERISTICS
Load Regulation
0.4
FIGURE 1 CIRCUIT
0.2
Burst Mode OPERATION
DISABLED
0
VIN = 15V
–0.2
–0.4
Burst Mode
OPERATION
VIN = 5V
ENABLED
–0.6
–0.8
–1.0
0
0.5
1.0
1.5
LOAD CURRENT (A)
2.0
1771 G04
Shutdown Quiescent Current
vs Input Voltage
8
6
TA = –50°C
4
TA = 25°C
2
TA = 100°C
0
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
1771 G07
Active Mode Quiescent Current
vs Input Voltage
200
TA = 100°C
150
TA = –50°C TA = 25°C
100
50
0
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
1771 G05
Run/SS Current vs Input Voltage
5
TA = –50°C
4
3
TA = 25°C
2
1
TA = 100°C
0
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
1771 G08
Sleep Quiescent Current
vs Input Voltage
12
10
TA = 100°C
TA = 25°C
8
6
TA = –50°C
4
2
0
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
1771 G06
Current Sense Voltage
vs Temperature
200
VIN = 10V
150
MAXIMUM
100
BURST THRESHOLD
50
0
MINIMUM
–50
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1771 G09
Reference Voltage
vs Temperature
1.25
VIN = 10V
1.24
Load Step Transient Response
VOUT
100mV/DIV
Burst Mode Operation
VOUT
50mV/DIV
1.23
1.22
1.21
–50 –25 0
25 50
TEMPERATURE (°C)
INDUCTOR
CURRENT
1A/DIV
75 100
1771 G10
VIN = 10V
50µs/DIV
VOUT = 3.3V
ILOAD = 100mA TO 2A
FIGURE 1 CIRCUIT
INDUCTOR
CURRENT
0.5A/DIV
1771 G11
VIN = 10V
10µs/DIV
VOUT = 3.3V
ILOAD = 100mA
FIGURE 1 CIRCUIT
1771 G12
4
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