Preliminary

RT9238

DS9238-01 July 2001

www.richtek-ic.com.tw

5

Absolute Maximum Ratings

Supply Voltage

+15V

FAULT/VID4 and GATE Voltage

GND

Input, Output or I/O Voltage

GND

−0.3V ~ 7V

Ambient Temperature Range

0

°C ~ +70°C

Operating Junction Temperature Range

0

°C ~ +125°C

Storage Temperature Range

−65°C ~ +150°C

Lead Temperature (Soldering, 10 sec.)

300

°C

Package Thermal Resistance

SOP-28,

60

°C/W

Recommended Operating Conditions

Supply Voltage

+12V

±10%

Ambient Temperature Range

0

°C to 70°C

Junction Temperature Range

0

°C to 125°C

CAUTION:

Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the

device. This is a stress only rating and operation of the device at these or any other conditions above those

indicated in the operational sections of this specification is not implied.

Electrical Characteristics

°C, Unless otherwise specified.)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

VCC Supply Current

Nominal Supply Current

UGATE1, LGATE1, DRIVE2,

DRIVE3, and DRIVE4 Open

--

10

--

mA

Power-On Reset

VCC Rising Threshold

6.5

--

9.5

V

VCC Falling Threshold

6--

9

V

Rising VAUX Threshold

--

1.5

--

V

VAUX Threshold Hysteresis

--

0.2

--

V

--

1.25

--

V

DAC AND Band Gap Reference

DAC (VID25-VID3) Input Low Voltage

--

--

0.8

V

DAC(VID25-VID3) Input High Voltage

2.0

--

--

V

DACOUT Voltage Accuracy

VDAC + 40mV

-10

--

+20

mV

Oscillator

Free Running Frequency

180

200

225

KHz

Ramp Amplitude

--

1.9

--

To be continued