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LT1942

1942fb

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V, VSHDN = VIN, unless otherwise noted. (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ELECTRICAL CHARACTERISTICS

PGOOD Leakage Current

PGOOD NPN Off, VPGOOD = 5V

0.1

µA

PGOOD Sink Current

PGOOD NPN On, VPGOOD = 1V

0.5

0.7

CT Charging Current

µA

CT Reference Voltage

0.8

VOUT3 Leakage Current

Output Disconnect PNP Off, D3 = 36V, VOUT = 0V

µA

VOUT3 Source Current

Output Disconnect PNP On, D3 = 3V, VOUT = 2.5V

Minimum D3/VOUT3 Operating Voltage

Minimum D3 Voltage for Proper Output

Disconnect PNP Operation

D4 LED Open-Circuit Voltage

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 LT1942 is guaranteed to meet performance specifications

from 0

°C to 70°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical controls.

Note 3: Current flows out of the pin.

Note 4: Current limit guaranteed by design and/or correlation to static test.

Note 5: VCESAT 100% tested at wafer level.

TYPICAL PERFOR A CE CHARACTERISTICS

VFB1 Voltage

TEMPERATURE (

°C)

–40

1.26

1.27

1.28

1942 G01

1.25

1.24

–20

100

1.23

1.22

TEMPERATURE (

°C)

–40

–155

–154

–152

–151

–150

–145

–148

1942 G02

–153

–147

–146

–149

–20

100

TEMPERATURE (

°C)

–40

1.26

1.27

1.28

1942 G01

1.25

1.24

–20

100

1.23

1.22

NFB2 Voltage

VFB3 Voltage

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