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DC/DC Power Solution
RT9186A/RT9186B
Low Profile 500mA LDO with Enable and Power Good/Reset
General Description


The RT9186 is a low-dropout linear regulator providing up to 500mA load current with 160mV dropout. It is especially designed for the application of portable and smart handheld device.
The RT9186 operates from 2.5V to 5.5V supply. The internal P-MOSFET pass transistor allows the regulato to work with 190uA low quiescent current. Its preset output voltage version covers the most frequently used values, including 1.8V/2.5V/3.3V. Output voltage can also be adjusted via the ADJ pin for those other than the preset values.
With only 0.1uA required in the shut down mode, one enable pin is able to control output on/off. RT9186A contains PGOOD function. On the other hand, RT9186B contains RST function with 6ms (typ.) time delay.

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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

• 2.5V to 5.5V Wide Input Range
• Guaranteed 500mA Output Current
• Low 160mV Dropout at 500mA
• 1.8V/2.5V/3.3V Preset Output Voltage Version with Adjustable Range from 0.8V to
  4.5V.
• Reset Output with 6ms (typ.) Delay Time
• Power Good Output
• Low 190uA Ground Pin Current
• 0.1uA Shutdown Current
• Thermal and Over Current Protection
• RoHS Compliant and 100% Lead (Pb)-Free
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Application

• Notebook Computer
• PDAs/SHDs
• PCMCIA/Cardbus Card Product
• Mobile Phone
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Pin Configurations


(TOP VIEW)



 MSOP-8                            VDFN-8L 3x3
RT9186A


      

  MSOP-8                            VDFN-8L 3x3
RT9186B

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Typical Applications Circuit


Figure 1. Fixed Voltage Regulator





Figure 2. Adjustable Voltage Regulator

Note1 : R2 should be less than 80k to ensure regulation.
Note2 : X5R or X7R input capacitor ¡Ù1mF is recommended for output stability.

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