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DC/DC Power Solution
RT9018A/RT9018B
Maximum 3A, Ultra Low Dropout Regulator
General Description


The RT9018A/B is a high performance positive voltage regulator designed for use in applications requiring very low Input voltage and very low dropout voltage at up to 3A(Peak). It operates with a VIN as low as 1.0V and VDD voltage 3V with output voltage programmable as low as 0.8V. The significant feature includes ultra low dropout, ideal for applications where VOUT is very close to VIN. Additionally, there is an enable pin to further reduce power dissipation while shutdown. The RT9018A/B provides excellent regulation over variations in line, load and temperature. and provides a power OK signal to indicate if the voltage level of Vo reaches 90% of its rating value.
The RT9018A/B is available in the SOP-8 (Exposed Pad) and WDFN-10L 3x3 packages with 1V, 1.05V, 1.2V, 1.5V, 1.8V and 2.5V internally preset outputs that are also adjustable using external resistors.

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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.
► 100% matte tin (Sn) plating.

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Features

• Maximum 3A Low-Dropout Voltage Regulator
• High Accuracy Output Voltage ±1.5%
• Typically 220mV Dropout at 3A
• Power Good Output 
• Output Voltage Pull Low Resistance when Disable
• Thermal and Over Current Protection
• RoHS Compliant and 100% Lead (Pb)-Free

 

 

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Application

• Front Side Bus VTT (1.2V/3A)
• NoteBook PC Applications
• Motherboard Applications
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Pin Configurations


(TOP VIEW)

SOP-8 (Exposed Pad)

WDFN-10L 3x3

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Typical Applications Circuit


Figure 1. Fixed Voltage Regulator

 

 

Figure 2. Adjustable Voltage Regulator

 

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