LT8300
Typical perForMance characTerisTics
Output Load and Line Regulation
5.20
5.15
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.10
5.05
5.00
4.95
4.90
4.85
4.80
0
50
100
150
200
LOAD CURRENT (mA)
V
IN
= 36V
V
IN
= 48V
V
IN
= 72V
250
300
8300 G01
T
A
= 25°C, unless otherwise noted.
Switching Frequency
vs Load Current
500
FRONT PAGE APPLICATION
V
IN
= 48V
Output Temperature Variation
5.5
5.4
5.3
FREQUENCY (kHz)
0
25 50 75 100 125 150
AMBIENT TEMPERATURE (°C)
8300 G02
FRONT PAGE APPLICATION
FRONT PAGE APPLICATION
V
IN
= 48V, I
OUT
= 200mA
400
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
–50 –25
300
200
100
0
0
50
100
150
200
LOAD CURRENT (mA)
250
300
8300 G03
Boundary Mode Waveforms
Discontinuous Mode Waveforms
Burst Mode Waveforms
I
LPRI
100mA/DIV
V
SW
50V/DIV
V
OUT
50mV/DIV
2µs/DIV
FRONT PAGE APPLICATION
V
IN
= 48V, I
OUT
= 300mA
8300 G04
I
LPRI
100mA/DIV
V
SW
50V/DIV
V
OUT
50mV/DIV
2µs/DIV
FRONT PAGE APPLICATION
V
IN
= 48V, I
OUT
= 60mA
8300 G05
I
LPRI
100mA/DIV
V
SW
50V/DIV
V
OUT
50mV/DIV
20µs/DIV
FRONT PAGE APPLICATION
V
IN
= 48V, I
OUT
= 1mA
8300 G06
10
V
IN
Shutdown Current
V
IN
Quiescent Current,
Sleep Mode
100
90
80
I
Q
(µA)
T
J
= 150°C
T
J
= 25°C
I
Q
(µA)
340
380
V
IN
Quiescent Current,
Active Mode
8
360
T
J
= 150°C
T
J
= 25°C
320
T
J
= –55°C
300
I
Q
(µA)
6
70
60
50
4
T
J
= 150°C
T
J
= 25°C
T
J
= –55°C
0
0
20
40
60
V
IN
(V)
80
100
8300 G07
T
J
= –55°C
2
40
0
20
40
60
V
IN
(V)
80
100
8300 G08
280
0
20
40
60
V
IN
(V)
80
100
8300 G09
8300f
4
LINER [ LINEAR TECHNOLOGY ]
