RT9179A Datasheet | Richtek

.. Adjustable, 500m A LDO Regulator with Enable General Description The RT9179A 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 500m A with two external resistors to set the output voltage ranges from 1.175V to 4.5V. The RT9179A has superior regulation over variations in line and load. Also it provides fast response to step changes in load. Other Features include over-current and overtemperature protection. The device has enable pin to reduce power consumption in shutdown mode. The device is available in SOP-8 package. Features 400m V Dropout @ 500m A 150μA Low Quiescent Current Excellent Line and Load Regulation <1μA Standby Current in Shutdown Mode Guaranteed 500m A Output Current Adjustable Output Voltage Ranges from 1.175V to 4.5V Over-Temperature/Over-Current Protection Ro HS pliant and 100% Lead (Pb)-Free Applications Battery-Powered Equipments Graphic Card Peripheral Cards PCMCIA Card Ordering Information RT9179A Package Type S : SOP-8 Operating Temperature Range P : Pb Free with mercial Standard G : Green (Halogen Free with mercial Standard) Pin Configurations (TOP VIEW) EN VIN VOUT ADJ 2 3 4 8 7 6 5 GND GND GND GND Note : Rich Tek Pb-free and Green products are : `Ro HS pliant and patible with the current requirements of IPC/JEDEC J-STD-020. `Suitable for use in Sn Pb or Pb-free soldering processes. `100%matte tin (Sn) plating. SOP-8 Typical Application Circuit RT9179A VIN Chip Enable C3 0.1u F C1 1u F EN GND ADJ R2 VIN VOUT R1 C2 3.3u F VOUT VOUT = 1.175 x ( 1 + Note: R2 around 200kΩ is remended. Refer to the “ Application Information” for COUT selection. R1 ) Volts R2 DS9179A-07 March 2007 .richtek. 1 .. Functional Pin Description Pin No. 2 5, 6, 7, 8 1 4 3 Pin Name VIN GND EN ADJ VOUT Power Input Voltage Ground Chip Enable...