RT9259

5

DS9259-03T00

August 2007

www.richtek.com

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Oscillator

Free Running Frequency

250

300

350

kHz

Ramp Amplitude

--

1.6

--

V

Reference Voltage

PWM Error Amplifier Reference

0.792

0.8

0.808

V

Linear Driver Reference

0.784

0.8

0.816

V

Error Amplifier

DC Gain

70

88

--

dB

Gain-Bandwidth Product

GBW

6

15

--

MHz

Slew Rate

SR

3

6

--

V/us

Gate Driver

Upper Drive Source

--

4

8

Ω

Upper Drive Sink

--

4

8

Ω

Lower Drive Source

--

4

6

Ω

Lower Drive Sink

--

2

4

Ω

Protection

Under Voltage Protection

0.36

0.4

0.45

V

Soft-Start Time Interval

2

3

4

ms

Over Current Threshold

--

-400

--

mV

RT_DIS Shutdown Threshold

0.35

0.4

--

V

Linear Regulator

Output High Voltage

9.5

10.3

--

V

Output Low Voltage

--

0.1

1

V

Source Current

2

--

--

mA

Sink Current

0.5

--

--

mA

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 recommended.

Note 3. The device is not guaranteed to function outside its operating conditions.

Note 4.

of JEDEC 51-7 thermal measurement standard.