RT9205APS datasheet(6/15 Pages) RICHTEK

6 / 15 page

RT9205/A

Preliminary

DS9205/A-08 March 2007

www.richtek.com

Absolute Maximum Ratings

Electrical Characteristics

Supply Voltage VCC ------------------------------------------------------------------------------------------------ 7V

BOOT & UGATE to GND ------------------------------------------------------------------------------------------- 19V

Input, Output or I/O Voltage --------------------------------------------------------------------------------------- GND-0.3V to 7V

Package Thermal Resistance

SOP-14,

θJA ----------------------------------------------------------------------------------------------------------------------------------------------------- 160°C/W

Ambient Temperature Range --------------------------------------------------------------------------------------0

°C to +70°C

Junction Temperature Range --------------------------------------------------------------------------------------

−40°C to +125°C

Storage Temperature Range ---------------------------------------------------------------------------------------

−65°C to +150°C

Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------- 260

°C

(VCC = 5V, TA = 25° C, Unless otherwise specified.)

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.

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

VCC Supply Current

Nominal Supply Current

ICC

UGATE, LGATE open

VCC Regulated Voltage

VCC

VBOOT = 12V

Power-On Reset

Rising VCC Threshold

3.8

4.1

4.4

VCC Threshold Hysteresis

0.5

Reference

Reference Voltage

VFB

Both PWM and linear regulator

0.784

0.8

0.816

Oscillator

Free Running Frequency

250

300

350

kHz

Ramp Amplitude

∆ VOSC

1.75

VP-P

PWM Error Amplifier

DC gain

PWM Controller Gate Driver

Upper Drive Source

RUGATE

BOOT= 12V

BOOT-VUGATE = 1V

7.5

Ω

Upper Drive Sink

RUGATE

VUGATE = 1V

Ω

Lower Drive Source

RLGATE

VCC - VLGATE = 1V,

3.5

Ω

Lower Drive Sink

RLGATE

VLGATE = 1V

Ω

Linear Regulator

DRV Driver Source

VDRV = 2V

100

Protection

FB Over-Voltage Trip

FB Rising

0.9

FB & FBL Under-Voltage Trip

FB & FBL Falling

0.5

0.65

Soft-Start Interval

2.5

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