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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TYPICAL PERFOR A CE CHARACTERISTICS
LTC1775
Maximum Current Sense Voltage
vs Duty Cycle
350
300
250
200
150
100
50
0
0
0.2
0.4
0.6
0.8
1.0
DUTY CYCLE
1775 • G10
FCB Pin Current vs Temperature
0
– 0.5
– 1.0
– 1.5
– 2.0
–40 –15
10 35 60 85
TEMPERATURE (°C)
110 135
1775 • G13
Transient Response
Maximum Current Sense Voltage
vs Temperature
320
Oscillator Frequency
vs Temperature
300
250
310
SYNC = 1.5V
200
SYNC = 0V
300
150
100
290
50
280
–40 –15
10 35 60 85
TEMPERATURE (°C)
110 135
1775 • G11
RUN/SS Pin Current vs
Temperature
0
0
–40 –15
10 35 60 85
TEMPERATURE (°C)
110 135
1775 • G12
Soft Start
RUN/SS
–1
5V/DIV
–2
VOUT
5V/DIV
–3
IL
–4
5A/DIV
–5
–40 –15
10 35 60 85
TEMPERATURE (°C)
110 135
1775 • G14
Transient Response
(Burst Mode Operation)
VIN = 20V
20ms/DIV
VOUT = 5V
RLOAD = 0.5Ω
FIGURE 1 CIRCUIT
Burst Mode Operation
1530 G16
VOUT
100mV
/DIV
IL
5A/DIV
VIN = 20V
100µs/DIV
VOUT = 5V
ILOAD = 2A TO 8A
FIGURE 1 CIRCUIT
VOUT
100mV
/DIV
1530 G18
IL
5A/DIV
VIN = 20V
200µs/DIV
VOUT = 5V
ILOAD = 100mA TO 2A
FIGURE 1 CIRCUIT
VOUT
50mV
/DIV
ITH
100mV
/DIV
1530 G17
IL
2A/DIV
VIN = 20V
20µs/DIV
VOUT = 5V
ILOAD = 100mA
FIGURE 1 CIRCUIT
1530 G15
5
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