Datasheet

LT8620
7
8620fa
For more information www.linear.com/LT8620
TYPICAL PERFORMANCE CHARACTERISTICS
Bias Pin Current Bias Pin Current
Switching Waveforms, Full
Frequency Continuous Operation
Switching Waveforms,
Burst Mode Operation Switching Waveforms
Transient Response; Load Current
Stepped from 1A to 2A
INPUT VOLTAGE (V)
5
BIAS PIN CURRENT (mA)
4.0
65
8620 G28
3.5
2.5
15
25
45
35
55
4.5
3.0
V
BIAS
= 5V
V
OUT
= 5V
I
LOAD
= 1A
f
SW
= 700kHz
SWITCHING FREQUENCY (MHz)
0
0
BIAS PIN CURRENT (mA)
2
4
6
8
10
0.5 1 1.5 2
8620 G29
2.5
V
BIAS
= 5V
V
OUT
= 5V
V
IN
= 12V
I
LOAD
= 1A
I
L
1A/DIV
V
SW
5V/DIV
500ns/DIV
12V
IN
TO 5V
OUT
AT 1A
8620 G30
I
L
200mA/DIV
V
SW
5V/DIV
2µs/DIV
12V
IN
TO 5V
OUT
AT 10mA
V
SYNC
= 0V
8620 G31
I
L
1A/DIV
V
SW
20V/DIV
500ns/DIV
48V
IN
TO 5V
OUT
AT 1A
8620 G32
I
LOAD
1A/DIV
V
OUT
100mV/DIV
50µs/DIV
1A TO 2A TRANSIENT
12V
IN
, 5V
OUT
C
OUT
= 47µF
8620 G33
T
A
= 25°C, unless otherwise noted.
Transient Response; Load Current
Stepped from 50mA
(Burst Mode Operation) to 1A
I
LOAD
1A/DIV
V
OUT
200mV/DIV
50µs/DIV
50mA (Burst Mode Operation) TO 1A TRANSIENT
12V
IN
, 5V
OUT
C
OUT
= 47µF
8620 G34
Start-Up Dropout Performance
V
IN
2V/DIV
V
OUT
2V/DIV
100ms/DIV
2.5Ω LOAD
(2A IN REGULATION)
8620 G35
V
IN
V
OUT
Start-Up Dropout Performance
V
IN
2V/DIV
V
OUT
2V/DIV
100ms/DIV
20Ω LOAD
(250mA IN REGULATION)
8620 G36
V
IN
V
OUT
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