AP2138/2139 ULTRA LOW QUIESCENT CURRENT CMOS LDO Description Features The AP2138/2139 series are CMOS-based positive voltage regulator Ultra-Low Quiescent Current: 1.0A Typical ICs. Each of these ICs consists of a voltage reference, an error Output Voltages: 1.2V, 1.4V, 1.5V, 1.8V, 2.1V, 2.2V, 2.5V, 2.8V, amplifier, a resistor network for setting output voltage and a current 3.0V, 3.3V, 3.6V and 4.0V limit circuit for current protection. High Output Voltage Accuracy: 2% Output Current: 250mA The difference between AP2138 and AP2139 is the AP2139 has an Low Dropout Voltage: enable circuit with a quick discharge function. 25mV Typical at I = 10mA and V = 3V OUT OUT 200mV Typical at I = 100mA and V = 3V OUT OUT These ICs feature high output voltage accuracy, extremely low Line Regulation: 6mV Typical quiescent current and low dropout voltage which make them ideal for Load Regulation: 25mV Typical use in various power sources for portable applications. Low Output Voltage Temperature Coefficient: 100ppm/C Low Standby Current: 0.1A Typical (AP2139) The AP2138/2139 series have 1.2V, 1.4V, 1.5V, 1.8V, 2.1V, 2.2V, Active Quick Output Discharge (AP2139) 2.5V, 2.8V, 3.0V, 3.3V, 3.6V and 4.0V fixed output voltage versions. Logic-Controlled Enable (AP2139) Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) The AP2138 series is available in SOT-23-3 and SOT-89 packages, AP2139 series is available in SOT-23-5 package. Applications Battery Powered Equipment Reference Voltage Sources Cameras, Video Cameras Portable AV Systems Mobile Phones Communication Tools Portable Games Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See AP2138/2139 Pin Assignments (continued) (Top View) (Top View) (Top View) 3 V OUT 3 V 3 V IN IN 2 V IN 2 2 GND GND 1 GND 1 1 V V OUT OUT SOT-89 (Option 2)/ R Package SOT-89 (Option 1)/ RA Package SOT-89 (Option 2)/ RA Package Typical Applications Circuit (Note 4) Note 4: Filter capacitors are required at the AP2138/2139 s input and output. 1F capacitor is required at the input. The minimum output capacitance required for stability should be more than 1F with ESR from 0.01 to 100. Ceramic capacitors are recommended. 2 of 29 AP2138/2139 August 2019 Diodes Incorporated www.diodes.com Document number: DS37428 Rev. 5 - 2 ADVANCED INFORMATION