LT3685 LINER [Linear Technology], LT3685 Datasheet - Page 8

• Manufacturer Part Number: LT3685
• Description: 36V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

10mV/DIV
LT3690
TYPICAL PERFORMANCE CHARACTERISTICS
0.5A/DIV
8
5V/DIV
V
V
OUT
650
630
610
590
570
550
SW
I
5
4
3
2
1
0
L
–50
Switching Frequency
vs Temperature
0
V
FRONT PAGE APPLICATION
V
Switching Waveforms,
Burst Mode Operation
R
IN
CCINT
T
= 12V, I
1
= 32.4k
–25
2
vs V
LOAD
0
V
TEMPERATURE (°C)
3
IN
IN
= 20mA
PIN VOLTAGE (V)
4
25
5µs/DIV
5
50
6
75
7
8
100
3690 G26
3690 G29
3690 G32
9
125
10
10mV/DIV
0.5A/DIV
5V/DIV
V
V
–10
–20
–30
–40
–50
240
200
160
120
OUT
SW
60
40
I
0
0
L
–50
0
Minimum Switch On-Time
vs Temperature
V
Switching Waveforms, Transition
from Burst Mode Operation to Full
Frequency
V
FRONT PAGE APPLICATION
IN
VCCINT
= 12V, I
–25
1
Current Limit
LOAD
V
CCINT
0
TEMPERATURE (°C)
= 200mA
2
PIN VOLTAGE (V)
25
1µs/DIV
50
3
75
4
100
T
3690 G30
3690 G27
3690 G33
A
= 25°C, unless otherwise noted.
125
5
10mV/DIV
5V/DIV
1A/DIV
V
–1.4
–1.6
–1.8
–2.0
–2.2
–2.4
–2.6
–2.8
–3.0
V
OUT
SW
I
5
4
3
2
1
0
L
–50
–50
Soft-Start Pin Current
V
Switching Waveforms, Full
Frequency Continuous Operation
V
FRONT PAGE APPLICATION
IN
CCINT
–25
= 12V, I
–25
Pin Voltage
0
LOAD
0
TEMPERATURE (°C)
TEMPERATURE (°C)
25
= 2A
25
1µs/DIV
50
50
75
75
100
100
125
3690 G28
3690 G31
3690 G34
3690f
125
150