LTC1628CG-SYNC Ver la hoja de datos (PDF) - Linear Technology
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LTC1628CG-SYNC Datasheet PDF : 32 Pages
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LTC1628-SYNC
TYPICAL PERFOR A CE CHARACTERISTICS
Maximum Current Sense
Threshold vs Temperature
80
78
76
74
72
70
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1628 G17
Soft-Start Up (Figure 14)
Dropout Voltage vs Output Current
(Figure 14)
4
VOUT = 5V
3
2
RSENSE = 0.015Ω
1
RSENSE = 0.010Ω
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT CURRENT (A)
1628 G18
Load Step (Figure 14)
RUN/SS Current vs Temperature
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1628 G25
Load Step (Figure 14)
VOUT
5V/DIV
VRUN/SS
5V/DIV
IOUT
2A/DIV
VOUT
200mV/DIV
IOUT
2A/DIV
VOUT
200mV/DIV
IOUT
2A/DIV
VIN = 15V
VOUT = 5V
5ms/DIV
1628 G19
VIN = 15V
20µs/DIV
VOUT = 5V
LOAD STEP = 0A TO 3A
Burst Mode OPERATION
1628 G20
VIN = 15V
20µs/DIV
VOUT = 5V
LOAD STEP = 0A TO 3A
CONTINUOUS MODE
1628 G21
Input Source/Capacitor
Instantaneous Current (Figure 14)
Burst Mode Operation (Figure 14)
Constant Frequency (Burst Inhibit)
Operation (Figure 14)
IIN
2A/DIV
VIN
200mV/DIV
VSW1
10V/DIV
VSW2
10V/DIV
VIN = 15V
1µs/DIV
VOUT = 5V
IOUT5 = IOUT3.3 = 2A
VOUT
20mV/DIV
VOUT
20mV/DIV
IOUT
0.5A/DIV
1628 G22
VIN = 15V
VOUT = 5V
VFCB = OPEN
IOUT = 20mA
10µs/DIV
1628 G23
IOUT
0.5A/DIV
VIN = 15V
VOUT = 5V
VFCB = 5V
IOUT = 20mA
2µs/DIV
1628 G24
6
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