LTC3616 Datasheet, PDF (5/28 Pages) Linear Technology – 6A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter

LTC3616
TYPICAL PERFORMANCE CHARACTERISTICS V_IN = 3.3V, RT/SYNC = SV_IN unless otherwise noted.
Efficiency vs Input Voltage
Burst Mode Operation
(V_MODE = 0V)
100
V_OUT = 1.8V
90
80
70
60
50
40
30
2.5
I_OUT = 6mA
I_OUT = 600mA
I_OUT = 2A
I_OUT = 6A
3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
3616 G04
Efficiency vs Frequency
Burst Mode Operation
(V_MODE = 0V), I_OUT = 2A
95
94
93
V_IN = 3.3V
V_OUT = 1.8V
92
91
90
89
88
87
86
85
84
150nH
83
330nH
470nH
82
0.5 1 1.5 2 2.5 3 3.5 4 4.5
FREQUENCY (MHz)
3616 G05
Load Regulation
(V_IN = 3.3V, V_OUT = 1.8V)
1.5
FORCED CONTINUOUS MODE
1.3
PULSE-SKIPPING MODE
INTERNAL Burst Mode OPERATION
1.1
0.9
0.7
0.5
0.3
0.1
–0.1
–0.3
0
1000 2000 3000 4000 5000 6000
OUTPUT CURRENT (mA)
3616 G06
Line Regulation
0.3
Burst Mode Operation
0.2
0.1
V_OUT
20mV/DIV
0
–0.1
–0.2
–0.3
2.20 2.75
3.30 3.85 4.40
INPUT VOLTAGE (V)
4.95 5.50
3616 G07
I_L
1A/DIV
V_OUT = 1.8V
I_OUT = 150mA
V_MODE = 0V
20μs/DIV
Forced Continuous Mode Operation
Load Step Transient in
Pulse-Skipping Mode
V_OUT
20mV/DIV
V_OUT
200mV/DIV
Pulse-Skipping Mode Operation
V_OUT
20mV/DIV
3616 G08
I_L
1A/DIV
V_OUT = 1.8V
I_OUT = 150mA
V_MODE = 3.3V
20μs/DIV
Load Step Transient in
Burst Mode Operation
3616 G09
V_OUT
200mV/DIV
I_L
500mA/DIV
V_OUT = 1.8V
I_OUT = 100mA
V_MODE = 1.5V
1μs/DIV
I_LOAD
5A/DIV
3616 G10
100μs/DIV
V_OUT = 1.8V
I_LOAD = 100mA TO 6A
V_MODE = 3.3V
COMPENSATION FIGURE 1
3616 G11
I_LOAD
5A/DIV
100μs/DIV
V_OUT = 1.8V
I_LOAD = 100mA TO 6A
V_MODE = 0V
COMPENSATION FIGURE 1
3616 G12
3616f
5