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DC/DC Power Solution
RT9179
Adjustable, 300mA LDO Regulator with Enable
General Description

The RT9179 is a high performance linear voltage regulator with enable high function and adjustable output with a 1.175V reference voltage. It operates from an input of 3V to 5.5V and provides output current up to 300mA with two external resistors to set the output voltage ranges from 1.175V to 4.5V.
The RT9179 has superior regulation over variations in line and load. Also it provides fast respond to step changes in load. Other features include over-current and over-temperature protection. The device has enable pin to reduce power consumption in shutdown mode.
The devices is available in the popular SOT-23-5 package.
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Ordering Info


Note :
Richtek Pb-free and Green products are :
► RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
► Suitable for use in SnPb or Pb-free soldering processes.

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Features

• 300mV Dropout @ 300mA
• 150uA Low Ground Pin Current
• Excellent Line and Load Regulation
• <1uA Standby Current in Shutdown Mode
• Guaranteed 300mA Output Current
• Stable with 1uF Input and Output Ceramic Capacitor
• Adjustable Output Voltage Ranges from 1.175V to
4.5V
• Over-Temperature/Over-Current Protection
• RoHS Compliant and 100% Lead (Pb)-Free
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Application

• Battery-Powered Equipment
• Graphic Card
• Peripheral Cards
• PCMCIA Card
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Pin Configurations


(TOP VIEW)

SOT-23-5

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Typical Applications Circuit


VOUT = 1.175 x ( ) Volts

Note: The external feedback resistors are in hundreds of OHM to hundreds of kOHM ranges.

Adjustable Operation

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