lt3480emse-trpbf Linear Technology Corporation, lt3480emse-trpbf Datasheet - Page 6

• Manufacturer Part Number: lt3480emse-trpbf
• Description: 38v, 2a, 2.4mhz Step-down Switching Regulator With 70?a Quiescent Current
• Manufacturer: Linear Technology Corporation

LT3480
TYPICAL PERFORMANCE CHARACTERISTICS
6
2.50
2.00
1.50
1.00
0.50
–10
–20
–30
–40
–50
50
40
30
20
10
0
–200
0
–50
Error Amp Output Current
V
C
–25
Voltages
CURRENT LIMIT CLAMP
SWITCHING THRESHOLD
FB PIN ERROR VOLTAGE (V)
–100
0
TEMPERATURE (°C)
10mV/DIV
25
0.2A/DIV
5V/DIV
V
V
50
OUT
0
SW
I
L
Switching Waveforms; Transition
from Burst Mode to Full Frequency
V
I
75
LOAD
IN
= 12V; FRONT PAGE APPLICATION
100
100
= 110mA
125
3480 G19
3480 G22
150
200
1μs/DIV
5.0
4.5
4.0
3.5
3.0
2.5
2.0
95
90
85
80
75
–50
Minimum Input Voltage
Power Good Threshold
1
V
T
L = 4.7μH
f = 800kHz
OUT
A
–25
= 25°C
3480 G25
= 3.3V
10
0
TEMPERATURE (°C)
LOAD CURRENT (A)
25
10mV/DIV
0.5A/DIV
5V/DIV
V
100
50
V
OUT
SW
I
L
75
Switching Waveforms; Full
Frequency Continuous Operation
V
I
LOAD
IN
= 12V; FRONT PAGE APPLICATION
100
1000
= 1A
125
3480 G23
3480 G20
10000
150
1μs/DIV
10mV/DIV
0.2A/DIV
5V/DIV
V
V
OUT
6.5
6.0
5.5
5.0
4.5
4.0
SW
I
L
Minimum Input Voltage
Switching Waveforms; Burst Mode
1
V
I
LOAD
V
T
L = 4.7μH
f = 800kHz
IN
OUT
A
= 12V; FRONT PAGE APPLICATION
= 25 °C
= 10mA
3480 G26
= 5V
10
LOAD CURRENT (A)
5μs/DIV
100
1000
3480 G21
3480 G24
3480fb
10000