RT7253A datasheet(5/14 Pages) RICHTEK

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RT7253A

DS7253A-02 March 2011

www.richtek.com

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Logic-High

VIH

2.7

5.5

EN Input Threshold

Voltage

Logic-Low

VIL

0.4

Input Under Voltage Lockout Threshold

VUVLO

VIN Rising

3.8

4.2

4.5

Input Under Voltage Lockout Hysteresis

ΔVUVLO

320

Soft-Start Current

ISS

VSS = 0V

μA

Soft-Start Period

tSS

CSS = 0.1μF

13.5

Thermal Shutdown

TSD

150

°C

Note 1. Stresses listed as the above

"Absolute Maximum Ratings" may cause permanent damage to the device. These are for

stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the

operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended

periods may remain possibility to affect device reliability.

Note 2.

θJA is measured in natural convection at TA = 25°C on a high effective thermal conductivity four -layer test board of

JEDEC 51-7 thermal measurement standard. The measurement case position of

θJC is on the exposed pad of the

package.

Note 3. Devices are ESD sensitive. Handling precaution is recommended.

Note 4. The device is not guaranteed to function outside its operating conditions.

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