LTC4253IGN datasheet(4/32 Pages) LINER

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LTC4253

4253f

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.

tSQ

SQTIMER 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 2V

250

µs

tPLLUG

UV Low to GATE Low

0.4

µs

tPHLOG

OV High to GATE Low

0.4

µs

ELECTRICAL CHARACTERISTICS The q 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

TYPICAL PERFOR A CE CHARACTERISTICS

IIN vs Temperature

IIN vs VIN

rZ vs Temperature

VZ vs Temperature

Undervoltage Lockout VLKO vs

Temperature

Undervoltage Lockout Hysterisis

VLKH vs Temperature

TEMPERATURE (

°C)

–55 –35 –15

85 105 125

4253 G01

IIN = 2mA

TEMPERATURE (

°C)

–55 –35 –15

85 105 125

4253 G02

14.5

14.0

13.5

13.0

12.5

12.0

IIN = 2mA

VIN (V)

4253 G03

1000

100

0.1

TA = 85°C

TA = 125°C

TA = –40°C

TA = 25°C

TEMPERATURE (

°C)

–55 –35 –15

85 105 125

4253 G04

1000

950

900

850

800

750

700

650

600

550

500

VIN = VZ – 0.3V

TEMPERATURE (

°C)

–55 –35 –15

85 105 125

4253 G05

11.0

10.5

10.0

9.5

9.0

8.5

8.0

7.5

7.0

TEMPERATURE (

°C)

–55 –35 –15

85 105 125

4253 G06

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

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