LTC3615 Datasheet, PDF (5/32 Pages) Linear Technology – Dual 4MHz, 3A Synchronous Step-Down DC/DC Converter

LTC3615
Typical Performance Characteristics V_IN = 3.3V, R_T/SYNC = SV_IN, unless otherwise noted.
Efficiency vs Load Current
(V_MODE = 0V)
100
V_OUT = 1.8V
90
80
70
60
50
40
30
20
10
0
0.001
V_IN = 2.5V
V_IN = 3.3V
V_IN = 5V
0.01
0.1
1
OUTPUT CURRENT (A)
10
3615 G01
Efficiency vs Load Current
(V_MODE = 0V)
100
V_OUT = 1.2V
90
80
70
60
50
40
30
20
10
0
0.001
V_IN = 2.5V
V_IN = 3.3V
V_IN = 5V
0.01
0.1
1
OUTPUT CURRENT (A)
10
3615 G02
Efficiency vs Load Current
(V_MODE = 0V)
100
V_OUT = 2.5V
90
80
70
60
50
40
30
20
10
0
0.001
V_IN = 3.3V
V_IN = 4V
V_IN = 5V
0.01
0.1
1
OUTPUT CURRENT (A)
10
3615 G03
Efficiency vs Load Current
(V_MODE = 0.55 • SV_IN)
100
V_OUT = 1.8V
90
80
70
60
50
40
30
20
10
0
0.001
V_IN = 2.25V
V_IN = 3.3V
V_IN = 5V
0.01
0.1
1
OUTPUT CURRENT (A)
10
3615 G04
Efficiency vs Load Current
(V_MODE = 0.55 • SV_IN)
100
V_OUT = 1.2V
90
80
70
60
50
40
30
20
10
0
0.001
V_IN = 2.25V
V_IN = 3.3V
V_IN = 5V
0.01
0.1
1
OUTPUT CURRENT (A)
10
3615 G05
Efficiency vs Input Voltage
(V_MODE = 0V)
95
V_OUT = 1.8V
90
85
80
75
70
65
I_OUT = 3A
60
I_OUT = 2A
I_OUT = 1A
55
I_OUT = 0.3A
I_OUT = 0.2A
50
2.25 2.75 3.25 3.75 4.25 4.75 5.25
INPUT VOLTAGE (V)
3615 G06
Load Regulation
0.5 _{VMODE = 1.5V}
0.4
INTERNAL
0.3
COMPENSATION
(I_TH = SV_IN )
0.2
0.1
0 _EXTERNAL
–0.1 ^COMPENSATION
–0.2
–0.3
–0.4
0
0.5 1 1.5 2 2.5 3
OUTPUT CURRENT (A)
3615 G07
Line Regulation
0.20
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
2.25 2.75 3.25 3.75 4.25 4.75 5.25
INPUT VOLTAGE (V)
3615 G08
3615f