LT8601 datasheet(4/26 Pages) LINER

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LT8601

8601fa

For more information www.linear.com/LT8601

elecTrical characTerisTics The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = PVIN1 = PVIN2 = 12V, EN/UVLO = 3V, PVIN3 = 3.3V unless otherwise

noted. (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PG2 Leakage Current

PG2 = 5V, FB2 = 1V

µA

TRKSS2 Pull-Up Current

TRKSS2 = 0.2V

1.5

2.4

3.1

µA

Minimum Switch-On Time

ISW2 = 2A

Minimum Switch-Off Time

ISW2 = 2A

Channel 3

Operating Voltage

2.6

5.5

Feedback Voltage

790

800

810

Input Current FB3

–100

100

FB3 Voltage Line Regulation

VIN = 3V to 42V

0.002

0.01

%/V

SW3 Current Limit

2.6

3.2

3.8

SW3 Leakage

PVIN3 = 5.5V

0.1

µA

SW3 PMOS On Resistance

ISW3 = 1A

150

mΩ

SW3 NMOS On Resistance

ISW3 = 1A

120

mΩ

Lower FB3 Power Good Threshold

Percentage of VFB3

Upper FB3 Power Good Threshold

Percentage of VFB3

105

108

111

PG3 Output Voltage Low

IPG3 = –350μA

0.13

0.3

PG3 Leakage Current

PG3 = 5V, FB3 = 0.8V

µA

RUN3 Threshold Voltage

0.695

0.72

0.74

RUN3 Input Current

RUN3 = 3.3V

–100

100

Soft-Start Time

0.7

1.3

Minimum Switch-On Time

ISW3 = 1A

Minimum Switch-Off Time

ISW3 = 1A

PVIN3 UVLO

2.35

2.6

Power-On Reset

CPOR Pull-Up Current

CPOR = 0V

μA

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

RST = 6V, EN/UVLO = 0V

–40

POREN Threshold

1.15

1.2

1.25

POREN Pull-Up Current

POREN = 0V

0.8

1.2

1.6

μA

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 LT8601E 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

LT8601I 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.

Note 3: 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.

Note 4: All three channels enabled as shown in the application circuit

titled, “Details of the Front Page Application” (using the 1MHz component

values) found in the Typical Application section.

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