SPX3819 500mA Low-Noise LDO Voltage Regulator May 2014 Rev. 2.0.2 GENERAL DESCRIPTION APPLICATIONS The SPX3819 is a positive voltage regulator Portable Consumer Equipment with a low dropout voltage and low noise Portable Instrumentation output. In addition, this device offers a very low ground current of 800A at 100mA output. Industrial Equipment The SPX3819 has an initial tolerance of less SMPS Post Regulators than 1% max and a logic compatible ON/OFF switched input. When disabled, power consumption drops to nearly zero. Other key FEATURES features include reverse battery protection, Low Noise: 40V Possible current limit, and thermal shutdown. The SPX3819 includes a reference bypass pin for High Accuracy: 1% optimal low noise output performance. With its Reverse Battery Protection very low output temperature coefficient, this device also makes a superior low power Low Dropout: 340mV at Full Load voltage reference. Low Quiescent Current: 90A The SPX3819 is an excellent choice for use in Zero Off-Mode Current battery-powered applications such as cordless telephones, radio control systems, and Fixed & Adjustable Output Voltages: portable computers. It is available in several - 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V & 5.0V fixed output voltage options or with an Fixed Output Voltages adjustable output voltage. - 1.235V Adjustable Output Voltages This device is offered in 8 pin NSOIC, 8 pin Available in RoHS Compliant, Lead Free DFN and 5-pin SOT-23 packages. Packages: - 5-pin SOT-23, 8-pin SOIC and 8-pin DFN TYPICAL APPLICATION DIAGRAM Fig. 1: SPX3819 Application Circuit Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 Fax. +1 510 668-7001 SPX3819 500mA Low-Noise LDO Voltage Regulator ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of Input Voltage Range V ................................ 2.5V to 16V IN the device at these ratings or any other above those Enable Pin EN ............................................... 0.0V to V IN indicated in the operation sections of the specifications Junction Temperature Range ................. -40C to +125C below is not implied. Exposure to absolute maximum 1 Thermal Resistance ..................................................... rating conditions for extended periods of time may affect (SOT23-5) ...............................................191C/W JA reliability. (NSOIC-8) ............................................ 128.4C/W JA V , EN ..................................................... -20V to +20V IN (DFN-8) ................................................... 59C/W JA Storage Temperature .............................. -65C to 150C Note 1: The maximum allowable power dissipation is a Junction Temperature .......................................... 150C function of maximum operating junction temperature, Power Dissipation ................................ Internally Limited TJ(max) the junction to ambient thermal resistance, and the Lead Temperature (Soldering, 5 sec) ..................... 260C ambient , and the ambient temperature T . The JA A ESD Rating (HBM - Human Body Model) .................... 2kV maximum allowable power dissipation at any ambient temperature is given: P = (T -T )/ , exceeding D(max) J(max) A JA the maximum allowable power limit will result in excessive die temperature thus, the regulator will go into thermal shutdown ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Junction Temperature of T = 25C only limits applying over the full J Operating Junction Temperature range are denoted by a . Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T = 25C, and are provided for J reference purposes only. Unless otherwise indicated, V = V + 1V (V = V + 1.2V for 1.2V option), I = 100A, C = IN OUT IN OUT L L 1F, V 2.5V, T = T = 25C. EN A J Parameter Min. Typ. Max. Units Conditions +1 -1 Output Voltage Tolerance % +2 -2 Output Voltage Temperature 57 ppm/C Coefficient 0.04 0.1 V = V +1 to 16V and V 6V IN OUT EN 0.2 V = V = V +1 8V IN EN OUT Line Regulation %/V V = V = V +1 16V IN EN OUT 0.2 T = 25C to 85C A Load Regulation 0.05 0.4 % I = 0.1mA to 500mA L 10 60 I = 100A L 80 125 175 I = 50mA L 250 2 Dropout Voltage (V -V ) mV IN OUT 180 350 I = 150mA L 450 340 550 I = 500mA L 700 0.05 3 V 0.4V ENABLE Quiescent Current (I ) A GND 8 V = 0.25V ENABLE 90 150 I = 100A L 190 A 250 650 I = 50mA L 900 Ground Pin Current (I ) GND 1.0 2.0 I = 150mA L 2.5 mA 6.5 25.0 I = 500mA L 30.0 Ripple Rejection (PSRR) 70 dB 2013 Exar Corporation 2/12 Rev. 2.0.2