RT9204

Preliminary

www.richtek-ic.com.tw

DS9204-00 February 2002

4

Absolute Maximum Ratings

Supply Voltage VCC

7V

BOOT & UGATE to GND

15V

Input, Output or I/O Voltage

GND

−0.3V ~ 7V

°C

SOP-8

0.625W

Package Thermal Resistance

SOP-8,

160

°C/W

Ambient Temperature Range

0

°C ~ +70°C

Junction Temperature Range

-40

°C ~ +125°C

Storage Temperature Range

-65

°C ~ +150°C

Lead Temperature (Soldering, 10 sec.)

260

°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

UGATE, LGATE open

--

3

--

mA

VCC Regulated Voltage

--

6

--

V

Power-On Reset

Rising VCC Threshold

3.75

4.1

4.35

V

VCC Threshold Hysteresis

--

0.5

--

V

Reference

Reference Voltage

Both FB & FBL

0.784

0.8

0.816

V

Oscillator

Free Running Frequency

550

600

650

KHz

Ramp Amplitude

--

1.75

--

PWM Error Amplifier

DC Gain

--

35

--

dB

PWM Controller Gate Driver

Upper Drive Source

--

7

--

Ω

Upper Drive Sink

--

5

--

Ω

Linear Regulator

DRV Driver Source

100

--

--

mA

Protection

FB Over-Voltage Trip

FB Rising

--

1

--

V

FB & FBL Under-Voltage Trip

FB & FBL Falling

--

0.5

--

V

Soft-Start Interval

--

1

--

mS

SD Pin Threshold

VCC = 5V

--

1.5

--

V

SD pin Sink Current

VCC = 5V

--

40

--

µA