LTC3731 Datasheet, PDF (8/32 Pages) Linear Technology – 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller

LTC3731
TYPICAL PERFOR A CE CHARACTERISTICS
Differential Amplifier Gain-Phase
0
0
–3
–45
–6
–90
–9
–135
–12
–180
–15
0001
Shed Mode at 1 Amp, Light Load
Current (Circuit of Figure 14)
0.01
0.1
1
FREQUENCY (MHz)
–225
10
3731 G19
Burst Mode at 1 Amp, Light Load
Current (Circuit of Figure 14)
V_OUT
AC, 20mV/DIV
V_SW1
10V/DIV
V_SW2
10V/DIV
V_SW3
10V/DIV
V_IN = 12V
4µs/DIV
V_OUT = 1.5V
V_FCB = V_CC
FREQUENCY = 250kHz
3731 G20
Continuous Mode at 1 Amp, Light
Load Current (Circuit of Figure 14)
V_OUT
AC, 20mV/DIV
V_SW1
10V/DIV
V_SW2
10V/DIV
V_SW3
10V/DIV
V_IN = 12V
4µs/DIV
V_OUT = 1.5V
V_FCB = 0V
FREQUENCY = 250kHz
8
3731 G22
V_OUT
AC, 20mV/DIV
V_SW1
10V/DIV
V_SW2
10V/DIV
V_SW3
10V/DIV
V_IN = 12V
4µs/DIV
V_OUT = 1.5V
V_FCB = OPEN
FREQUENCY = 250kHz
3731 G21
Transient Load Current Response: 0 Amp
to 50 Amp (Circuit of Figure 14)
V_OUT
AC, 20mV/DIV
I_LOAD
20A/DIV
V_IN = 12V
20µs/DIV
V_OUT = 1.5V
V_FCB = V_CC
FREQUENCY = 250kHz
3731 G23
3731fa