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LT8300HS5#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
LT8300
4
8300f
Typical perForMance characTerisTics
Boundary Mode Waveforms Discontinuous Mode Waveforms Burst Mode Waveforms
V
IN
Shutdown Current
V
IN
Quiescent Current,
Sleep Mode
V
IN
Quiescent Current,
Active Mode
Output Load and Line Regulation Output Temperature Variation
Switching Frequency
vs Load Current
T
A
= 25°C, unless otherwise noted.
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
5.20
4.85
5.15
4.90
5.00
5.05
5.10
4.95
4.80
8300 G01
300250200150100500
V
IN
= 36V
V
IN
= 48V
V
IN
= 72V
FRONT PAGE APPLICATION
AMBIENT TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
5.5
4.6
5.4
4.7
5.0
5.1
5.2
5.3
4.8
4.9
4.5
8300 G02
1507550 125100250–25–50
FRONT PAGE APPLICATION
V
IN
= 48V, I
OUT
= 200mA
LOAD CURRENT (mA)
FREQUENCY (kHz)
500
100
200
400
300
0
8300 G03
300250200150100500
FRONT PAGE APPLICATION
V
IN
= 48V
2µs/DIV
FRONT PAGE APPLICATION
V
IN
= 48V, I
OUT
= 300mA
I
LPRI
100mA/DIV
V
SW
50V/DIV
V
OUT
50mV/DIV
8300 G04
2µs/DIV
FRONT PAGE APPLICATION
V
IN
= 48V, I
OUT
= 60mA
I
LPRI
100mA/DIV
V
SW
50V/DIV
V
OUT
50mV/DIV
8300 G05
20µs/DIV
FRONT PAGE APPLICATION
V
IN
= 48V, I
OUT
= 1mA
I
LPRI
100mA/DIV
V
SW
50V/DIV
V
OUT
50mV/DIV
8300 G06
V
IN
(V)
I
Q
(µA)
10
2
4
8
6
0
8300 G07
100806040200
T
J
= –55°C
T
J
= 150°C
T
J
= 25°C
V
IN
(V)
I
Q
(µA)
100
50
60
80
90
70
40
8300 G08
100806040200
T
J
= 25°C
T
J
= –55°C
T
J
= 150°C
V
IN
(V)
I
Q
(µA)
380
300
320
360
340
280
8300 G09
100806040200
T
J
= 25°C
T
J
= –55°C
T
J
= 150°C
LT8300
5
8300f
Typical perForMance characTerisTics
R
DS(ON)
Switch Current Limit Maximum Switching Frequency
Minimum Switching Frequency Minimum Switch-On Time Minimum Switch-Off Time
EN/UVLO Enable Threshold EN/UVLO Hysteresis Current R
FB
Regulation Current
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
V
EN/UVLO
(V)
1.240
1.205
1.210
1.225
1.230
1.235
1.215
1.220
1.200
8300 G10
1507550 125100250–25–50
TEMPERATURE (°C)
HYS
1
2
3
4
0
8300 G11
1507550 125100250–25–50
TEMPERATURE (°C)
I
RFB
(µA)
105
101
102
103
104
100
96
97
98
99
95
8300 G12
1507550 125100250–25–50
TEMPERATURE (°C)
RESISTANCE (Ω)
25
5
10
15
20
0
8300 G13
1507550 125100250–25–50
TEMPERATURE (°C)
I
SW
(mA)
300
50
100
150
200
250
0
8300 G14
1507550 125100250–25–50
MAXIMUM CURRENT LIMIT
MINIMUM CURRENT LIMIT
TEMPERATURE (°C)
FREQUENCY (kHz)
1000
200
400
600
800
0
8300 G15
1507550 125100250–25–50
TEMPERATURE (°C)
FREQUENCY (kHz)
20
4
8
12
16
0
8300 G16
1507550 125100250–25–50
TEMPERATURE (°C)
TIME (ns)
400
100
200
300
0
8300 G17
1507550 125100250–25–50
TEMPERATURE (°C)
TIME (ns)
400
100
200
300
0
8300 G18
1507550 125100250–25–50
LT8300
6
8300f
pin FuncTions
EN/UVLO (Pin 1): Enable/Undervoltage Lockout. The
EN/UVLO pin is used to enable the LT8300. Pull the pin
below 0.3V to shut down the LT8300. This pin has an ac-
curate 1.223V threshold and can be used to program a V
IN
undervoltage lockout (UVLO) threshold using a resistor
divider from V
IN
to ground. A 2.5µA current hysteresis
allows the programming of V
IN
UVLO hysteresis. If neither
function is used, tie this pin directly to V
IN
.
GND (Pin 2): Ground. Tie this pin directly to local ground
plane.
R
FB
(Pin 3): Input Pin for External Feedback Resistor.
Connect a resistor from this pin to the transformer pri-
mary SW pin. The ratio of the R
FB
resistor to the internal
trimmed 12.23k resistor, times the internal bandgap
reference, determines the output voltage (plus the effect
of any non-unity transformer turns ratio). Minimize trace
area at this pin.
SW (Pin 4): Drain of the 150V Internal DMOS Power
Switch. Minimize trace area at this pin to reduce EMI and
voltage spikes.
V
IN
(Pin 5): Input Supply. The V
IN
pin supplies current
to internal circuitry and serves as a reference voltage for
the feedback circuitry connected to the R
FB
pin. Locally
bypass this pin to ground with a capacitor.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LT8300HS5#TRMPBF

Mfr. #:
Buy LT8300HS5#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 150V, 300mA Micropower Isolated Flyback Converter
Lifecycle:
New from this manufacturer.
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