lt3481imse-trpbf Linear Technology Corporation, lt3481imse-trpbf Datasheet - Page 6

• Manufacturer Part Number: lt3481imse-trpbf
• Description: 36v, 2a, 2.8mhz Step-down Switching Regulator With 50?a Quiescent Current
• Manufacturer: Linear Technology Corporation

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