RT9267 datasheet(3/9 Pages) RICHTEK | High Efficiency, Low Quiescent, Triple Output DC-DC Converter

3 page

RT9267

Preliminary

DS9267-08

March 2007

www.richtek.com

Function Block Diagram

Absolute Maximum Ratings

Supply Voltage ------------------------------------------------------------------------------------------------------

−0.3V to 7V

LX Pin Switch Voltage ---------------------------------------------------------------------------------------------

−0.3V to (VDD + 0.8V)

LDO Output Voltage -----------------------------------------------------------------------------------------------

−0.3V to (VDD + 0.3V)

Other I/O Pin Voltages --------------------------------------------------------------------------------------------

−0.3V to (VDD + 0.3V)

LX Pin Switch Current --------------------------------------------------------------------------------------------- 2.5A

EXT Pin Driver Current --------------------------------------------------------------------------------------------- 30mA

LBO Current --------------------------------------------------------------------------------------------------------- 30mA

Power Dissipation, PD @ TA = 25

°C

TSSOP-16 ------------------------------------------------------------------------------------------------------------ 600mW

Operating Junction Temperature -------------------------------------------------------------------------------- 150

°C

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

−65°C to +150°C

st PWM converter

nd PWM converter

Loop Control Circuit

0.86V

N MOS

1.25V

VDD

N MOS

EN2

LBI

LBO

FB2

N MOS

LX2

GND

Shut Down

Over Temp.

Detector

2nd PWM and Voltage Detector controlled with CE2

Loop Control Circuit

0.86V

P MOS

1.25V

VDD

N MOS

EN1

LFB

LDO O

FB1

N MOS

LX1

Shut Down

Over Temp.

Detector

VDD

1st PWM and LDO controlled with CE1

VDD

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