LTC1773 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1773' PDF : 20 Pages View PDF
LTC1773
TYPICAL PERFOR A CE CHARACTERISTICS
Maximum Current Sense
Threshold vs VRUN/SS
120
100
80
60
40
20
0
0.5 1.0
1.5 2.0 2.5 3.0
VRUN/SS (V)
3.5 4.0
1773 G07
Oscillator Frequency vs
Temperature
560
550
Maximum Current Sense
Threshold vs Temperature
105
Maximum Current Sense
Threshold vs VITH
120
100
100
80
60
Burst Mode
OPERATION
95
40
85
– 60 – 40 – 20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
1773 G08
20
FORCED
CONTINUOUS
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
VITH (V)
1773 G09
RUN/SS Pin Current vs
Temperature
2.5
2.0
Burst Mode Operation
ILOAD = 100mA
SEE FIGURE 9
VOUT
20mV/DIV
540
1.5
IL
530
1.0
500mA/DIV
520
– 60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
1773 G10
0.5
– 60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
1773 G11
VIN = 5V
VOUT = 2.5V
20µs/DIV
Start-Up
Load Step (Burst Mode
Operation)
Load Step (Continuous
Mode)
SEE FIGURE 9
VOUT
2V/DIV
VRUN/SS
1V/DIV
SEE FIGURE 9
VOUT
100mV/DIV
SEE FIGURE 9
VOUT
100mV/DIV
IL
2A/DIV
IL
2A/DIV
IL
2A/DIV
1773 G12
VIN = 5V
VOUT = 2.5V
40ms/DIV
1773 G13
4
VIN = 5V
100µs/DIV
VOUT = 2.5V
100mA TO 5A LOAD STEP
1773 G14
VIN = 5V
100µs/DIV
VOUT = 2.5V
100mA TO 5A LOAD STEP
1773 G15
1773fb
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