LT8602 datasheet(5/38 Pages) LINER

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LT8603

8603f

For more information www.linear.com/LT8603

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 LT8603E is guaranteed to meet performance specifications

from 0°C to 125°C 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

LT8603I is guaranteed to meet performance specifications from –40°C

to 125°C junction temperature. High junction temperatures degrade

operating lifetimes. Operating lifetime is derated at junction temperatures

above 125°C.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Channel 4

Feedback Voltage FB4

788

800

812

FB4 Line Regulation

VIN = 3.2V to 42V

0.002

0.01

%/V

Input Current FB4

–100

100

Soft-Start Time

Current Comparator Limit Threshold

VISP4 to VISN4, VCM = 2V to 42V

Current Comparator Input Common Mode Range

ISP4, ISN4 Input Currents, Sleep

VISP4 = VISN4 = 2V to 42V, FB4 = 1V, SYNC = 0V

200

ISP4, ISN4 Input Currents, Active

VISP4 = VISN4 = 2V to 42V, FB4 = 0V, SYNC = 0V

μA

ISP4, ISN4 Input Currents

VISP4 = VISN4 = –42V

GATE4 High Side PMOS On-Resistance

2.5

GATE4 Low Side NMOS On-Resistance

1.25

FB4 Power Good Threshold

Percentage of VFB4, VFB4 Falling

Power Good Threshold Hysteresis

0.2

PG4 Output Voltage Low

IPG4 = 350μA

0.13

0.3

PG4 Leakage Current

PG4 = 5V, FB4 = 0.8V

μA

Power-On Reset

POR Delay Time

CPOR = 1000pF

35.2

39.4

RST Output Voltage Low

IRST = 100μA

0.1

0.2

RST Pull-Up Current

POR Timed Out, RST = 0V

μA

RST Leakage Current

POR Timed Out, RST = 6V

–100

100

POREN Threshold

1.15

1.2

1.25

POREN Pull-Up Current

POREN = 0V

0.6

1.0

1.4

μA

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, EN/UVLO = 3V unless otherwise noted. (Note 2)

Note 3: Current limit is assured by design and/or correlation to static test.

Slope compensation reduces current limit at higher duty cycles.

Note 4: Measurement made using the circuit titled, “Details of Front Page

Application” in the Typical Applications section.

Note 5: This IC includes overtemperature protection that is intended to

protect the device during overload conditions. Junction temperature will

exceed 150°C when overtemperature protection is active. Continuous

operation above the specified maximum junction temperature will

reduce lifetime.

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