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