LT3481 LINER [Linear Technology], LT3481 Datasheet - Page 6

• Manufacturer Part Number: LT3481
• Description: 36V, 2A, 2.8MHz Step-Down Switching Regulator with 50?A Quiescent Current
• Manufacturer: LINER [Linear Technology]

LT3481
TYPICAL PERFORMANCE CHARACTERISTICS
6
2.50
2.00
–40
1.50
1.00
0.50
100
–20
–80
–60
60
40
20
80
0
1.065
0
–50
Error Amp Output Current
V
C
–25
Voltages
10mV/DIV
0.5A/DIV
V
RUN/SS
5V/DIV
CURRENT LIMIT CLAMP
SWITCHING THRESHOLD
1.165
V
OUT
0
I
FB PIN VOLTAGE (V)
L
TEMPERATURE (°C)
Switching Waveforms; Transition
from Burst Mode to Full
Frequency
25
V
I
LOAD
IN
1?.265
= 12V; FRONT PAGE APPLICATION
50
= 140mA
75
1.365
100
1μs/DIV
125 150
1.465
3481 G19
3481 G22
1.200
1.180
1.160
1.140
1.120
1.100
3481 G25
4.5
4.0
3.5
3.0
2.5
2.0
0.001
–50
Power Good Threshold
Minimum Input Voltage
V
T
L = 4.7μ
f = 800kHz
PG RISING
A
OUT
–25
= 25 °C
= 3.3V
0.01
0
LOAD CURRENT (A)
TEMPERATURE (°C)
25
0.1
50
75
100 125
1
10mV/DIV
0.5A/DIV
V
RUN/SS
5V/DIV
3481 G20
3481 G23
V
OUT
150
10
I
L
Switching Waveforms; Full
Frequency Continuous Operation
V
I
LOAD
IN
10mV/DIV
0.5A/DIV
= 12V; FRONT PAGE APPLICATION
5V/DIV
= 1A
V
V
OUT
6.5
6.0
5.5
5.0
4.5
4.0
SW
I
L
0.001
Minimum Input Voltage
Switching Waveforms;
Burst Mode
V
I
LOAD
V
T
L = 4.7μ
f = 800kHz
IN
A
OUT
= 25 °C
= 12V; FRONT PAGE APPLICATION
1μs/DIV
= 10mA
= 5.0V
0.01
LOAD CURRENT (A)
5μs/DIV
0.1
3481 G26
1
3481 G21
3481 G24
3481fb
10