ltc3862gn-1 Linear Technology Corporation, ltc3862gn-1 Datasheet - Page 5

• Manufacturer Part Number: ltc3862gn-1
• Description: Multi-phase Current Mode Step-up Dc/dc Controller
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
500mA
1A/DIV
2A/DIV
2A/DIV
1V/DIV
I
I
TO 1A
LOAD1
LOAD2
I
V
LOAD
1.90
1.80
1.75
1.70
1.50
1.85
1.65
1.60
1.55
OUT
–50
Quiescent Current vs Temperature
Load Step
V
V
IN
OUT
= 24V
–25
= 72V
0
TEMPERATURE (°C)
100
25
95
90
85
80
75
70
65
60
55
50
45
40
400μs/DIV
10
Effi ciency vs Output Current
V
50
OUT
V
IN
= 72V
75
= 24V
100 125
LOAD CURRENT (mA)
100
V
IN
38621 G03
38621 G06
= 32V
150
V
IN
= 9V
1000
50V/DIV
50V/DIV
1A/DIV
1A/DIV
I
I
LOAD1
LOAD2
SW1
SW2
50
45
40
35
30
20
15
10
5
0
38621 G01
Shutdown Quiescent Current
vs Input Voltage
8
Inductor Current at Light Load
V
V
I
LOAD
IN
OUT
1000
= 24V
12
= 72V
= 100mA
16
INPUT VOLTAGE (V)
20
1μs/DIV
24
100
99
98
97
94
93
92
88
96
95
91
90
89
28
0
Effi ciency and Power Loss
vs Input Voltage
V
I
OUT
ON
32
= 72V
= 0.5A
38621 G07
38621 G04
10
36
INPUT VOLTAGE (V)
20
5.6
5.2
4.8
4.4
4.0
3.6
2.4
2.0
1.6
1.2
0.8
0.4
3.2
2.8
50
40
20
10
30
POWER LOSS
0
0
EFFICIENCY
–50
8
Quiescent Current
vs Input Voltage
Shutdown Quiescent Current
vs Temperature
V
IN
30
–25
= 12V
12
38621 G02
0
16
INPUT VOLTAGE (V)
TEMPERATURE (°C)
LTC3862-1
40
25
20
5000
4500
4000
3500
1500
3000
2500
2000
50
24
75
28
100 125
32
38621 G05
38621 G08
38621f
5
150
36