RT9214GS datasheet(5/17 Pages) RICHTEK

5 / 17 page

RT9214

DS9214-13

September 2007

www.richtek.com

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Oscillator

Free Running Frequency

fOSC

VCC = 12V

250

300

350

kHz

Ramp Amplitude

ΔVOSC

VCC = 12V

1.5

VP-P

Error Amplifier (GM)

E/A Transconductance

0.2

Open Loop DC Gain

PWM Controller Gate Drivers (VCC = 12V)

Upper Gate Source

IUGATE

VBOOT − VPHASE = 12V,

VUGATE − VPHASE = 6V

0.6

Upper Gate Sink

RUGATE

VBOOT − VPHASE = 12V,

VUGATE − VPHASE = 1V

Lower Gate Source

ILGATE

VCC = 12V, VLGATE = 6V

0.6

Lower Gate Sink

RLGATE

VCC = 12V, VLGATE = 1V

Dead Time

TDT

100

Protection

FB Under-Voltage Trip

Δ FBUVT FB Falling

OC Current Source

IOC

VPHASE = 0V

μA

Soft-Start Interval

TSS

3.5

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.

θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of

JEDEC 51-3 thermal measurement standard.

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