SPX5205 150mA, LOW-NOISE LDO VOLTAGE REGULATOR JULY 30, 2008 REV. H Fixed Output Voltage FEATURES V BYP OUT Low Noise Output LDO: 40V Possible RMS 54 1% Initial Accuracy Very Low Quiecent Current: 70A SPX5205 Low Dropout Voltage (210mV at 150mA) 5 Pin SOT-23 Current and Thermal Limiting 12 3 Reverse-Battery Protection GND EN V IN Wide Range of Fix Output Voltages:1.2V, 1.5V, Adjustable Output Voltage 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 5.0V V ADJ/BYP OUT Zero Off-Mode Current 54 Small 5-Pin SOT-23 SPX5205 Pin Compatible to MIC5205/MAX8877 5 Pin SOT-23 (fixed Options Only) and AS3815 12 3 GND EN V IN APPLICATIONS PDA Now Available in Lead Free Packaging Battery Powered Systems Portable Consumer Equipment Cellular Phone Portable Instrumentation Cordless Telephones Bar Code Scanners Radio Control Systems SMPS Post-Regulator Laptop, Palmtop, and Notebook Computers DESCRIPTION The SPX5205 is a positive voltage regulator with very low dropout voltage, output noise and ground current (750A at 100mA). V has a tolerance of less than 1% and is temperature compensated. Fixed output OUT voltages 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V, and 5.0V and an adjustable version are available in a small 5-pin SOT-23 package. Other key features include zero off-mode current, reverse battery protection, thermal shutdown and current limit. The SPX5205 is an excellent choice for use in battery- powered applications, and where power conservation is desired such as: cellular/ cordless telephones, radio control systems, and portable computers. TYPICAL APPLICATION CIRCUIT V 1 V 5 OUT IN + 1.0F 2 SPX5205 GND + 3 4 BYP EN (Optn) ENABLE may be tied directly to V IN TOP View Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com SPX5205 150mA, Low-Noise LDO Voltage Regulator REV. H ABSOLUTE MAXIMUM RATINGS Thermal Shutdown .................................................................... Internally Limited Input Supply Voltage ......................................... -20V to +20V Lead Temperature (Soldering, 5 seconds) ................................................. 260C Enable Input Voltage ......................................... -20V to +20V Operating Junction Temperature Range .................................... -40C to +125C RECOMMENDED OPERATING CONDITIONS Input voltage ..................................................................................... +2.5V to 16V Operating Junction Temperature Range .................................... -40C to +125C Enable Input Voltage .............................................................................. 0V to V IN SOT-23-5 (e ) ................................................................................... See Note 1 JA ELECTRICAL CHARACTERISTICS T =25C, V = V + 1V, I = 100A, C = 1F, and V * 2.4V. The z denotes the specifications which J IN OUT L L ENABLE apply over full temperature range -40C to +85C, unless otherwise specified. PARAMETER MIN TYP MAX UNITS CONDITIONS Output Voltage Tolerance (V) -1 +1 %V OUT NOM -2 +2 z Output Voltage Temperature Coefficient 57 ppm/C z Line Regulation 0.03 0.1 %/V 0.2 z Load Regulation 0.1 0.2 % 0.5 z I = 1mA to 150mA L z Dropout Voltage (See Note 2) 30 50 mV I = 100A L (V - V) 70 z IN O 140 190 mV I = 50mA L 230 z 180 250 mV I = 100mA L 300 z 210 275 mV I = 150mA L 350 z Quiescent Current (I) 0.05 1 A V ) 0.4V GND ENABLE 5 z V ) 0.25V ENABLE Ground Pin Current 70 125 A I = 100A L (I) 150 z GND 350 600 I = 50mA L 800 z 750 1000 I = 100mA L 1500 z 1300 1900 I = 150mA L 2500 z Ripple Rejection (PSRR) 70 dB Current Limit (I) 360 500 mA V = 0V LIMIT OUT Output Noise (e) 300 V I = 10mA, C = 1F, C = 1F NO RMS L L IN (10Hz - 100kHz.) 40 V I = 10mA, C = 10F, C = RMS L L BYP 1F,C =1F,(10Hz - 100kHz) IN Input Voltage Level Logic Low (V ) 0.4 V OFF IL Input Voltage Level Logic High (V ) 2.0 ON IL ENABLE Input Current 0.01 2 A V ) 0.4V IL 3 20 V * 2.0V IH Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, T , the junction to ambient thermal J (max) resistance, and the ambient, e J , and the ambient temperature T . The maximum allowable power dissipation at any ambient temperature is A A given: P = (T - T )/ e J , exceeding the maximum allowable power limit will result in excessive die temperature thus, the D (max) J (max) A A regulator will go into thermal shutdown. The e J of the SPX5205 is 220C/W mounted on a PC board. A Note 2: Not applicable to output voltages of less than 2V. 2