LT3480 LINER [Linear Technology], LT3480 Datasheet - Page 4

• Manufacturer Part Number: LT3480
• Description: 36V, 2A, 2.4MHz Step-Down Switching Regulator with 70?A Quiescent Current
• Manufacturer: LINER [Linear Technology]

LT3480
TYPICAL PERFORMANCE CHARACTERISTICS
4
100
120
100
90
80
70
60
50
3.5
3.0
2.5
2.0
1.5
1.0
80
60
40
20
0
0
Effi ciency
No Load Supply Current
0
Maximum Load Current
5
V
OUT
0.2 0.4 0.6 0.8
5
= 5V
V
10
IN
= 24V
V
10
TYPICAL
MINIMUM
LOAD CURRENT (A)
IN
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= 12V
15
15
1.0
L: NEC PLC-0745-5R6
f: 800kHz
20
V
1.2 1.4 1.6 1.8 2.0
IN
20
= 34V
25
V
V
T
L = 4.7μH
f = 800kHz
OUT
A
OUT
25
= 25 °C
30
= 3.3V
= 5V
3480 G01
3480 G04
3480 G07
35
30
85
80
75
70
65
60
55
90
50
400
350
300
250
200
150
100
0 0.2 0.4 0.6 0.8
4.0
3.5
3.0
2.5
2.0
1.5
1.0
Effi ciency
50
V
0
–50
OUT
No Load Supply Current
Switch Current Limit
0
V
V
CATCH DIODE: DIODES, INC. PDS360
= 3.3V
IN
OUT
–25
= 12V
V
= 3.3V
V
20
IN
IN
LOAD CURRENT (A)
= 12V
0
= 24V
INCREASED SUPPLY
CURRENT DUE TO CATCH
DIODE LEAKAGE AT
HIGH TEMPERATURE
TEMPERATURE (°C)
DUTY CYCLE (%)
25
40
1.0
L: NEC PLC-0745-5R6
f: 800kHz
50
1.2 1.4 1.6 1.8 2.0
V
IN
60
= 7V
75
V
IN
100
= 34V
80
3480 G02
125
3480 G05
3480 G08
150
100
90
80
70
60
50
40
30
Effi ciency
3.5
2.5
4.0
3.0
2.0
1.5
1.0
0.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
4.5
0
–50
0
Maximum Load Current
Switch Current Limit
5
0.5
–25
LOAD CURRENT (A)
10
0
TYPICAL
MINIMUM
DUTY CYCLE = 10 %
DUTY CYCLE = 90 %
TEMPERATURE (°C)
INPUT VOLTAGE (V)
1.0
25
15
50
V
V
L = 5.6μH
F = 800 kHz
IN
OUT
1.5
20
75
= 12V
= 3.3V
V
T
L = 4.7μH
f = 800 kHz
100
A
OUT
3480 G27
= 25 °C
25
= 3.3V
125
2
10
1
0.1
0.01
3480 G06
3480 G09
3480fb
150
30