AP2125 300mA, HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR Description Pin Assignments The AP2125 series are 300mA, positive voltage regulator ICs (Top View) fabricated by CMOS process. V IN 3 Each of these ICs is equipped with a voltage reference, an error amplifier, a resistor network for setting output voltage, a chip enable circuit, a current limit circuit and OTSD (over temperature shut down) circuit to prevent the IC from over current and over temperature. The AP2125 series have features of high ripple rejection, low dropout 1 2 voltage, low noise, high output voltage accuracy and low current GND V OUT consumption which make them ideal for use in various battery- powered apparatus. SOT-23-3 The AP2125 have 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.15V and 4.2V fixed voltage versions. These ICs are available in tiny SC-70-5 packages as well as industry (Top View) standard SOT-23-3 and SOT-23-5 packages. V 1 5 V IN OUT Features GND 2 Excellent Ripple Rejection: 70dB Typical (1.8V Version) CE Low Dropout Voltage: 65mV (I =100mA, 3.3V Version) 3 4 NC OUT Low Standby Current: 0.01A Typical Low Quiescent Current: 60A Typical Extremely Low Noise: 50Vrms Typical SOT-23-5/SC-70-5 Maximum Output Current: 300mA (Min.) High Output Voltage Accuracy: 2% Compatible with Low ESR Ceramic Capacitor Excellent Line/Load Regulation Applications Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) CDMA/GSM Cellular Handsets Battery-powered Equipments Laptops, Palmtops, Notebook Computers Hand-held Instruments PCMCIA Cards Portable Information Appliances Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AP2125 Typical Applications Circuit Pin Descriptions Pin Number Pin Name Function SOT-23-3 SOT-23-5/SC-70-5 3 1 V Input voltage IN 1 2 GND Ground Active high enable input pin. Logic high=enable, logic low = 3 CE shutdown 4 NC No connection 2 5 V Regulated output voltage OUT 2 of 25 AP2125 May 2016 Diodes Incorporated www.diodes.com Document number: DS38144 Rev. 2 - 2 ADVANCED INFORMATION