Datasheet

LTC3862
5
3862fc
For more information www.linear.com/LTC3862
Typical perForMance characTerisTics
Efficiency vs Output Current
Efficiency and Power Loss vs
Input Voltage
Load Step Inductor Current at Light Load
Quiescent Current vs Input
Voltage
LOAD CURRENT (mA)
10
70
EFFICIENCY (%)
75
80
85
90
100 1000 10000
3862 G01
65
60
55
50
95
100
V
OUT
= 48V
V
IN
= 35V
V
IN
= 24V
V
IN
= 12V
INPUT VOLTAGE (V)
0
90
EFFICIENCY (%)
POWER LOSS (mW)
91
92
93
94
95
96
1500
2000
2500
3000
3500
4000
10 20 30 40
3862 G02
EFFICIENCY
POWER LOSS
V
OUT
= 48V
I
OUT
= 1A
I
LOAD
5A/DIV
1A TO 5A
I
L1
5A/DIV
I
L2
5A/DIV
V
OUT
500mV/DIV
500µs/DIVV
IN
= 24V
V
OUT
= 48V
3862 G03
SW1
50V/DIV
SW2
50V/DIV
I
L1
2A/DIV
I
L2
2A/DIV
1µs/DIVV
IN
= 12V
V
OUT
= 48V
I
LOAD
= 100mA
3862 G04
INPUT VOLTAGE (V)
4
0
QUIESCENT CURRENT (mA)
0.50
1.00
1.50
2.00
3.00
8
12 16 20
3862 G05
24 28 32 36
2.50
0.25
0.75
1.25
1.75
2.75
2.25
Quiescent Current vs Temperature
Shutdown Quiescent Current vs
Input Voltage
Shutdown Quiescent Current vs
Temperature
TEMPERATURE (°C)
–50
QUIESCENT CURRENT (mA)
1.70
1.80
150
3862 G06
1.60
1.50
0
50
100
–25
25
75
125
1.90
1.65
1.75
1.55
1.85
INPUT VOLTAGE (V)
4
SHUTDOWN CURRENT (µA)
25
30
35
36
3862 G07
20
15
0
12
20
28
8
16
24
32
10
5
45
40
TEMPERATURE (°C)
–50
SHUTDOWN CURRENT (µA)
30
40
50
25 75 150
3862 G08
20
10
0
–25 0
50
100 125
V
IN
= 12V