LTC4253AIGN-ADJ datasheet(4/32 Pages) LINER

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LTC4253A-ADJ

4253a-adjf

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to VEE unless otherwise

specified.

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. (Note 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ISQTMR

SQTIMER Pin Current

SQTIMER On (Power Good Sequence, Sourcing),

●

357

µA

VSQTMR = 2V

SQTIMER On (Power Good Sequence, Sinking),

VSQTMR = 2V

VDRNL

DRAIN Pin Voltage Low Threshold

For PWRGD1, PWRGD2, PWRGD3 Status

●

2.39

IDRNL

DRAIN Leakage Current

VDRAIN = 4V

±0.1

±1

µA

VDRNCL

DRAIN Pin Clamp Voltage

IDRN = 50µA

●

7.5

VPGL

PWRGD1, PWRGD2, PWRGD3 Signals

IPG = 1.6mA

●

0.25

0.4

Output Low Voltage

IPG = 5mA

●

1.2

IPGH

PWRGD1, PWRGD2, PWRGD3

VPG = 0V (Sourcing)

●

µA

Output High Current

tSQ

SQ Timer Default Ramp Period

SQTIMER Pin Floating,

250

µs

VSQTMR Ramps from 0.5V to 3.5V

tSS

SS Default Ramp Period

SS Pin Floating, VSS Ramps from 0.2V to 1.25V

140

µs

tPLLUG

UV Low to GATE Low

●

µs

tPHLOG

OV High to GATE Low

●

µs

TYPICAL PERFOR A CE CHARACTERISTICS

IIN vs VIN

VZ vs Temperature

IIN vs Temperature

TEMPERATURE (

°C)

–50

–25

12.0

13.0

14.5

4253A G01

12.5

14.0

13.5

100

125

IIN = 2mA

VIN (V)

100

4253A G02

0.1

1000

TA = 125°C

TA = 85°C

TA = 25°C

TA = –40°C

TEMPERATURE (

°C)

–50

0.5

0.6

0.8

0.9

1.0

1.5

1.2

4253A G03

0.7

1.3

1.4

1.1

–25

100

125

VIN = VZ – 0.3V

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