Datasheet

LTC3860
5
3860fc
Load Step Transient Response
(Single Phase)
Load Step Transient Response
(2-Phase)
TYPICAL PERFORMANCE CHARACTERISTICS
Load Step Transient Response
(2-Phase with 50% Inductor
Mismatch)
Effi ciency and Power Loss
vs Load Current
Effi ciency and Power Loss
vs Supply Voltage
50μs/DIV
3860 G01
V
IN
= 12V
V
OUT
= 1.2V
I
LOAD
STEP = 10A
COMP VALUES:
R2A = 6.8kΩ, C1A = 470pF, C2A = 100pF
V
OUT
50mV/DIV
I
LOAD
10A/DIV
I
L
10A/DIV
Load Step Transient Response
(2-Phase)
V
OUT
50mV/DIV
50μs/DIV
3860 G02
V
IN
= 12V
V
OUT
= 1.8V
I
LOAD
STEP = 10A
I
L1
5A/DIV
I
LOAD
10A/DIV
I
L2
5A/DIV
V
OUT
50mV/DIV
50μs/DIV
3860 G03
V
IN
= 12V
V
OUT
= 1.2V
I
LOAD
STEP = 10A
I
L1
5A/DIV
I
LOAD
10A/DIV
I
L2
5A/DIV
LOAD CURRENT (A)
0.001
40
EFFICIENCY (%)
POWER LOSS (W)
50
60
70
80
0.01 0.1 1 10 100
3860 G05
30
20
10
0
90
100
1
2
3
4
5
0
6
7
V
IN
= 6V
V
OUT
= 1.2V
SUPPLY VOLTAGE (V)
6
70
EFFICIENCY (%)
POWER LOSS (W)
72
76
78
80
90
84
8
10
11
3860 G06
74
86
88
82
1.0
1.5
2.5
3.0
3.5
6.0
4.5
2.0
5.0
5.5
4.0
79
12
13
14
V
OUT
= 1.2V
I
OUT
= 15A
V
OUT(AC)
100mV/DIV
50μs/DIV
3860 G04
V
IN
= 12V
V
OUT
= 1.2V
I
LOAD
= 0A TO 25A
I
L1
= 320nH
10A/DIV
I
LOAD
20A/DIV
I
L2
= 220nH
10A/DIV