LTC1775 データシートの表示（PDF） - Linear Technology
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LTC1775
Linear Technology
LTC1775 Datasheet PDF : 24 Pages
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LTC1775
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Load Current
100
90
80
CONTINUOUS
BURST
MODE
MODE
70
60
50
0.001
VIN = 10V
VOUT = 5V
EXTVCC = VOUT
0.01
0.1
1.0
10
LOAD CURRENT (A)
1775 • G01
Efficiency vs Input Voltage
100
95
ILOAD = 5A
90
ILOAD = 500mA
85
80
75
70
0
VOUT = 5V
FIGURE 1 CIRCUIT
5 10 15 20 25 30
INPUT VOLTAGE (V)
1775 • G02
Load Regulation
0
FIGURE 1 CIRCUIT
– 0.1
– 0.2
– 0.3
– 0.4
– 0.5
0
2
4
6
8
10
LOAD CURRENT (A)
1775 • G04
Input and Shutdown Current
vs Input Voltage
1200
60
1000
EXTVCC OPEN
50
800
40
SHUTDOWN
600
30
400
20
EXTVCC = 5V
200
10
0
0
0 5 10 15 20 25 30 35
INPUT VOLTAGE (V)
1775 • G07
ITH Pin Voltage vs Load Current
3.0
FIGURE 1 CIRCUIT
VIN = 20V
2.5
VOUT = 5V
2.0
1.5
CONTINUOUS
MODE
1.0
0.5
BURST
MODE
0
02
4 6 8 10
LOAD CURRENT (A)
12 14
1775 • G05
INTVCC Load Regulation
1.0
VIN = 15V
0.5
0
– 0.5
–1.0
0
10
20
30
40
50
INTVCC LOAD CURRENT (mA)
1775 • G08
Efficiency vs Input Voltage
100
95
ILOAD = 5A
90
ILOAD = 500mA
85
80
75
70
0
VOUT = 3.3V
FIGURE 1 CIRCUIT
5 10 15 20 25 30
INPUT VOLTAGE (V)
1775 • G03
VIN – VOUT Dropout Voltage
vs Load Current
400
FIGURE 1 CIRCUIT
VOUT = 5V, 5% DROP
300
200
100
0
0
2
4
6
8
10
CURRENT LOAD (A)
1775 • G06
EXTVCC Switch Drop
vs INTVCC Load Current
500
VIN = 15V
EXTVCC = 5V
400
300
200
100
0
0
10
20
30
40
50
INTVCC LOAD CURRENT (mA)
1775 • G09
4
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