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| LTC3728LCGN-PBF Datasheet, PDF (8/38 Pages) Linear Technology – Dual, 550kHz, 2-Phase Synchronous Regulators | |||
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LTC3728L/LTC3728LX
Typical Performance Characteristics
Soft-Start Up (Figure 13)
Load Step (Figure 13)
VOUT
5V/DIV
VRUN/SS
5V/DIV
IL
2A/DIV
VIN = 15V
VOUT = 5V
5ms/DIV
VOUT
200mV/DIV
IL
2A/DIV
3728L G19
VIN = 15V
20µs/DIV
VOUT = 5V
VPLLFLTR = 0V
LOAD STEP = 0A TO 3A
Burst Mode OPERATION
Load Step (Figure 13)
VOUT
200mV/DIV
IL
2A/DIV
3728L G20
VIN = 15V
20µs/DIV
VOUT = 5V
VPLLFLTR = 0V
LOAD STEP = 0A TO 3A
CONTINUOUS MODE
3728L G21
Input Source/Capacitor
Instantaneous Current (Figure 13)
Burst Mode Operation (Figure 13)
Constant-Frequency (Burst Inhibit)
Operation (Figure 13)
IIN
2A/DIV
VIN
200mV/DIV
VSW1
10V/DIV
VSW2
10V/DIV
VIN = 15V
1µs/DIV
VOUT1 = 5V, VOUT2 = 3.3V
VPLLFLTR = 0V
IOUT5 = IOUT3.3 = 2A
VOUT
20mV/DIV
VOUT
20mV/DIV
IL
0.5A/DIV
3728L G22
VIN = 15V
VOUT = 5V
VPLLFLTR = 0V
VFCB = OPEN
IOUT = 20mA
10µs/DIV
3728L G23
IL
0.5A/DIV
VIN = 15V
VOUT = 5V
VPLLFLTR = 0V
VFCB = 5V
IOUT = 20mA
2µs/DIV
3728L G24
3728lxff
8
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