LT8303 datasheet(3/24 Pages) LINER

3 / 24 page

LT8303

8303f

For more information www.linear.com/LT8303

elecTrical characTerisTics

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The SW pin is rated to 150V for transients. Depending on the

leakage inductance voltage spike, operating waveforms of the SW pin

should be derated to keep the flyback voltage spike below 150V as shown

in Figure 5.

Note 3: The LT8303E is guaranteed to meet performance specifications

from 0°C to 125°C operating junction temperature. Specifications over

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, VEN/UVLO = VIN unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

VIN

Input Voltage Range

5.5

100

VIN UVLO Threshold

Rising

Falling

5.3

3.2

5.5

VIN Quiescent Current

VEN/UVLO = 0.3V

VEN/UVLO = 1.1V

Sleep Mode (Switch Off)

Active Mode (Switch On)

1.5

200

280

2.5

µA

EN/UVLO Shutdown Threshold

For Lowest Off IQ

0.3

0.75

EN/UVLO Enable Threshold

Falling

Hysteresis

1.186

1.223

0.016

1.284

IHYS

EN/UVLO Hysteresis Current

VEN/UVLO = 0.3V

VEN/UVLO = 1.1V

VEN/UVLO = 1.3V

–0.1

2.1

–0.1

2.5

0.1

2.9

0.1

µA

fMAX

Maximum Switching Frequency

320

350

380

kHz

fMIN

Minimum Switching Frequency

kHz

tON(MIN)

Minimum Switch-On Time

160

tOFF(MIN)

Minimum Switch-Off Time

VIN/VEN/UVLO = 12V

350

tOFF(MAX)

Maximum Switch-Off Time

Backup Timer

200

µs

ISW(MAX)

Maximum SW Current Limit

450

535

620

ISW(MIN)

Minimum SW Current Limit

105

140

SW Over Current Limit

To Initiate Soft-Start

RDS(ON)

Switch On-Resistance

ISW = 100mA

3.2

ILKG

Switch Leakage Current

VIN = 100V, VSW = 150V

0.1

0.5

µA

IRFB

RFB Regulation Current

97.5

100

102.5

µA

RFB Regulation Current Line Regulation

5.5V ≤ VIN ≤ 100V

0.001

0.01

%/V

the –40°C to 125°C operating junction temperature range are assured by

design, characterization and correlation with statistical process controls.

The LT8303I is guaranteed over the full –40°C to 125°C operating junction

temperature range.

Note 4: The LT8303 includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 150°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

LT8303 Datasheet(PDF) 3 Page - Linear Technology

LT8303 Datasheet(HTML) 3 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Datasheet Download

Link URL