LT3759 datasheet(3/24 Pages) AD

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LT8301

Rev. B

For more information www.analog.com

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 65V 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 65V as shown

in Figure 5.

Note 3: The LT8301E is guaranteed to meet performance specifications

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

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

design, characterization and correlation with statistical process controls.

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VEN/UVLO = VIN unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

VIN

Input Voltage Range

2.7

VIN UVLO Threshold

Rising

Falling

2.5

2.3

2.65

VIN Quiescent Current

VEN/UVLO = 0.2V

VEN/UVLO = 1.1V

Sleep Mode (Switch Off)

Active Mode (Switch On)

0.8

215

100

350

µA

EN/UVLO Shutdown Threshold

For Lowest Off IQ

0.2

0.55

EN/UVLO Enable Threshold

Falling

Hysteresis

1.204

1.228

0.014

1.248

IHYS

EN/UVLO Hysteresis Current

VEN/UVLO = 0.2V

VEN/UVLO = 1.1V

VEN/UVLO = 1.3V

–0.1

2.2

–0.1

2.5

0.1

2.8

0.1

µA

fMIN

Minimum Switching Frequency

9.4

10.6

kHz

tON(MIN)

Minimum Switch-On Time

170

tOFF(MAX)

Maximum Switch-Off Time

Backup Timer

190

µs

ISW(MAX)

Maximum SW Current Limit

1.200

1.375

1.550

ISW(MIN)

Minimum SW Current Limit

0.22

0.29

0.36

RDS(ON)

Switch On-Resistance

ISW = 500mA

0.4

ILKG

Switch Leakage Current

VIN = 42V, VSW = 65V

0.1

0.5

µA

IRFB

RFB Regulation Current

97.5

100

102.5

µA

RFB Regulation Current Line Regulation

2.7V ≤ VIN ≤ 42V

0.02

0.1

%/V

The LT8301I is guaranteed over the full –40°C to 125°C operating junction

temperature range. The LT8301J and LT8301H are guaranteed over the

full –40°C to 150°C operating junction temperature range. The LT8301MP

is guaranteed over the full –55°C to 150°C operating junction temperature

range. High junction temperatures degrade operating lifetimes. Operating

lifetime is derated at junction temperature greater than 125°C.

Note 4: The LT8301 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.

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