LTC3617_15 Datasheet, PDF (4/20 Pages) Linear Technology – 6A Monolithic Synchronous Step-Down Regulator for DDR Termination

LTC3617
Typical Performance Characteristics
T_A = 25°C, V_IN = 3.3V, f_O = 1MHz unless otherwise noted.
Efficiency vs Load Current
100
V_OUT = 1.25V
90
80
70
60
50
40
30
20
10
0
0.1
V_IN = 2.5V
V_IN = 3.3V
V_IN = 5V
1
LOAD CURRENT (A)
10
3617 G01
Efficiency vs Input Voltage
100
V_OUT = 1.25V
90
80
70
60
50
I_LOAD = 600mA
I_LOAD = 2A
I_OUT = 6A
40
2.25 2.75 3.25 3.75 4.25 4.75 5.25
INPUT VOLTAGE (V)
3617 G02
Efficiency vs Frequency
100
V_OUT = 1.25V
95
90
85
80
75
70
65
60
1 1.5 2 2.5 3
FREQUENCY (MHz)
150nH
330nH
470nH
3.5 4
3617 G03
Load Regulation
0.3
V_OUT = 1.25V
0.2
0.1
0
–0.1
–0.2
–0.3
–6
–4 –2 0
2
LOAD CURRENT (A)
4
6
3617 G04
Line Regulation
0.3
Output Voltage vs Time
0.2
SW
2V/DIV
0.1
0
V_OUT
20mV/DIV
–0.1
I_L
–0.2
1A/DIV
–0.3
2.20 2.75 3.30 3.85 4.40
INPUT VOLTAGE (V)
4.95 5.50
3617 G05
V_OUT = 1.25V
2µs/DIV
I_LOAD = 100mA
3617 G06
Load Step Transient
Load Step Transient
V_OUT
100mV/DIV
V_OUT
200mV/DIV
I_L
4A/DIV
I_L
5A/DIV
4
40µs/DIV
V_OUT = 1.25V
I_LOAD = 100mA TO 6A
COMPENSATION FIGURE 1
3617 G07
40µs/DIV
V_OUT = 1.25V
I_LOAD = –6A TO 6A
COMPENSATION FIGURE 1
3617 G09
3617fa