RT9643

10

DS9643-03 August 2007

www.richtek.com

Parameter

Symbol

Test Condition

Min

Typ

Max

Units

1.2V LDO

Regulation

I(1.2) from 0 to 5A

1.17

1.2

1.23

V

Drop-Out Voltage

--

--

0.3

V

External Gate Drive

--

--

4.5

V

Gate Drive Source Current

--

1.2

--

mA

Gate Drive Sink Current

--

1.2

--

mA

FB 1.2V PGOOD Threshold

--

--

0.8

V

3.3V LDO

Regulation

3.2

3.3

3.4

V

Drop-Out Voltage

I(3.3) ≦ 1.25A

--

--

1.5

V

Control Function

S3#I, EN input threshold

1

1.25

1.55

V

S3#I, EN input Current

-1

--

1

μA

Over-Temperature

Shutdown

--

150

--

°C

Over-Temperature

Hysteresis

--

25

--

°C

--

170

300

Ω

VCC_EN Output High

Leakage

--

4

10

μA

5VSB_DRV Output Low

resistance

5V_MAIN OK

--

125

200

Ω

5VSB_DRV Sink Current

5V_MAIN < UVLO

--

500

--

nA

5VSB_DRVOutput High

--

820

1200

Ω

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.

Devices are ESD sensitive. Handling precaution is highly recommended.

Note 3.

The operating conditions beyond the recommended range is not guaranteed.

Note 4.

1S) of JEDEC 51-3 thermal measurement standard.