WL2004 WL2004 300mA, Low noise, High PSRR LDO Http://www.willsemi.com Descriptions The WL2004 series are 300mA low dropout linear regulators and optimized to provide a high performance solution for battery power system to deliver low quiescent current. The WL2004 series are SOT-23-5L SOT-23-3L designed for portable RF and wireless applications to deliver ultra low output noise and high PSRR. The devices offer a new level of cost effective performance VOUT in cellular phones, laptop and notebook computers, NC VIN and other portable devices. 4 5 3 The WL2004 series are designed to make use of 1 1 low cost ceramic capacitors which ensure the stability 23 2 of the output current, and enhance the efficiency in order to prolong the battery life of those portable VIN GND EN GND VOUT devices. The WL2004 regulators are available in Pin Configuration (Top View) SOT-23-5L packages and SOT-23-3L package. WL2004 series are Pb-free and Halogen free products. Features Input voltage : 2.2V ~ 5.5V Output voltage : 1.2V ~ 3.3V **** **** Output current : 300mA PSRR : 70dB 1KHz For detail marking information please see page 8, 9. Output noise : 100uV Quiescent current : 120 A Typ. Marking Shut-down current : < 0.1 A Dropout voltage : 190mV 300mA Recommend capacitor : 1uF Operating Temperature : -40 ~ +85 C Over current/over temperature protection Applications Order Information For detail order information please see page 8, 9. MP3/MP4 Players Cellphones, radiophone, digital cameras Bluetooth, wireless handsets Others electronics devices Will Semiconductor Ltd. 1 May. 2010 Rev1.4 WL2004 Typical Application Pin Description PIN Symbol Description VIN VOUT1 5 1 VIN Input 1uF 1uF 2 GND Ground 2 3 EN Enable (Active high) 3 4 4 NC Not connected ON 5 VOUT Output OFF PIN Symbol Description 2 VOUT 1 GND Ground 1uF VIN 3 2 VOUT Output 1uF 1 3 VIN Input Block Diagram VIN VOUT - Vref + OCP EN EN OTP GND Will Semiconductor Ltd. 2 May. 2010 Rev1.4