SPX1587AU-L

S P X1 5 8 7 3A Low Dropout Voltage Regulator September 2010 Rev. 2.0.0 GENERAL DESCRIPTION APPLICATIONS The SPX1587 is a low power positive-voltage regulator designed to satisfy moderate power requirements with a cost effective, small footprint solution. • Desktop PC's Servers This device is an excellent choice for use in battery-powered applications and portable computers. The SPX1587 features very low quiescent current and a low dropout voltage of 1.1V at a full load. As output current decreases, quiescent current flows into the load, increasing efficiency. SPX1587 is available in adjustable or fixed 1.5V, 2.5V, 3.3V and 5.0V output voltages. • Portable Instrumentation The SPX1587 is offered in several 3-pin surface mount packages: TO-252, TO-220 and TO-263. An output capacitor of 10μF ceramic or tantalum provides unconditional stability. • Powering VGA and Sound Cards • Adjustable Power Supplies FEATURES • Guaranteed 3A Output Current • Three Terminal Adjustable or Fixed 1.5V, 2.5V, 3.3V and 5.0V • Low Quiescent Current • Low Dropout Voltage: 1.1V at 3A • Line Regulation: 0.1% • Load Regulation: 0.1% • Stable with 10uF Ceramic Capacitor • Over Current and Thermal Protection • Similar to Industry Standard LT1085/LT1585 • RoHS Compliant Lead Free 3-Pin TO-220, TO-252 and TO-263 Packages FUNCTIONAL DIAGRAM Fig. 1: SPX1587 Functional Diagram (Adjustable version) Exar Corporation 48720 Kato Road, Fremont CA 94538, USA www.exar.com Tel. +1 510 668-7000 – Fax. +1 510 668-7001 S P X1 5 8 7 3A Low Dropout Voltage Regulator ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Junction Temperature Range ....................-40°C to 125°C Thermal Resistance TO-220 θJC ...................................................... 3°C/W TO-220 θJA ................................................. 29.4°C/W TO-263 θJC ...................................................... 3°C/W TO-263 θJA ................................................. 31.4°C/W TO-252 θJC ...................................................... 6°C/W TO-252 θJA .................................................... 50°C/W Input Supply Voltage VIN .................................... +10.0V Input to Output Voltage ....................................... +8.8V Storage Temperature .............................. -65°C to 150°C Power Dissipation ................................ Internally Limited Lead Temperature (Soldering, 5 sec) ..................... 260°C ESD Rating (HBM - Human Body Model) .................... 2kV ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Ambient Temperature of TA = 25°C only; limits applying over the full Operating Temperature range (-40°C to +85°C) 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 TA = 25°C, and are provided for reference purposes only. Unless otherwise indicated, VIN = VOUT + 1.5V, TA = 25°C, CIN = COUT =10µF, IOUT=10mA. Parameter Min. Typ. 1.485 1.500 Max. Units Conditions 1.5V Version Output Voltage SPX1587A 1.515 1.530 1.470 V IOUT=10mA, VOUT=3.5V • 10mA≤IOUT≤3A, 3.0V≤VOUT≤10V • 10mA≤IOUT≤3A, 4.25V≤IOUT≤10V • 10mA≤IOUT≤3A, 4.75V≤VOUT≤10V • 10mA≤IOUT≤3A, 4.75V≤VOUT≤10V • 10mA≤IOUT≤3A, 6.50V≤VOUT≤10V • 10mA≤IOUT≤3A, 1.50V≤VIN-VOUT≤10V • 10mA≤IOUT≤3A, 1.50V≤VIN-VOUT≤10V 2.5V Version Output Voltage SPX1587 2.450 2.500 2.550 2.575 2.425 V IOUT=10mA, VOUT=4.5V 3.3V Version 3.267 Output Voltage SPX1587A 3.234 Output Voltage SPX1587 3.201 3.234 3.300 3.333 3.366 3.300 3.366 3.399 V V IOUT=10mA, VOUT=5V IOUT=10mA, VOUT=5V 5.0V Version Output Voltage SPX1587A 4.950 5.000 5.050 5.100 4.900 V IOUT=10mA, VOUT=7V All Voltage Options 1.238 Reference Voltage SPX1587A 1.225 Reference Voltage SPX1587 1.212 1.225 1.250 1.262 1.275 1.250 1.275 1.287 V V Output Voltage Temperature Stability – SPX1587A 0.3 % Output Voltage Temperature Stability – SPX1587 0.5 % IOUT=10mA, VIN-VOUT=2V IOUT=10mA, VIN-VOUT=2V 3.0V≤VIN≤10V, VOUT=1.5V Line Regulation 0.1 0.2 % 4.25V≤VIN≤10V, VOUT=2.5V 4.75V≤VIN≤10V, VOUT=3.3V 6.50V≤VIN≤10V, VOUT=5.0V 10mA≤IOUT≤3A, VOUT=1.5V Load Regulation 0.1 0.3 % 10mA≤IOUT≤3A, VOUT=2.5V 10mA≤IOUT≤3A, VOUT=3.3V 10mA≤IOUT≤3A, VOUT=5.0V © 2010 Exar Corporation 2/11 Rev. 2.0.0 S P X1 5 8 7 3A Low Dropout Voltage Regulator Parameter Min. Typ. Max. Units Conditions IOUT=1A 1.00 Dropout Voltage (note 2) Minimum Load Current (note 4) Quiescent Current Current Limit 1.2 4 10 mA 4 10 mA 5 0.01 Fixed Voltage Versions µA 120 3.2 Thermal Regulation Ripple Rejection IOUT=3A 1.10 50 Adjust Pin Current IOUT=2A V 1.05 µA • A 0.1 %/W VIN-VOUT=2V 25°C, 30ms pulse 75 dB FRIPPLE=120Hz, VIN-VOUT=2V, VRIPPLE=1VPP Long Term Stability 0.03 % 125°C, 1000 hours RMS Output Noise 0.03 % % of VOUT, 10Hz ≤ f ≤ 10kHz 60 Note 1: Output temperature coefficient is defined as the worst case voltage change divided by the total temperature range Note 2: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken into account. Note 3: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied. Excluding load or line regulation effect. Note 4: Adjustable Version Only. BLOCK DIAGRAM Fig. 2: SPX1587 Block Diagram © 2010 Exar Corporation 3/11 Rev. 2.0.0 S P X1 5 8 7 3A Low Dropout Voltage Regulator PIN ASSIGNMENT Fig. 3: SPX1587 Pin Assignment PIN DESCRIPTION Name Pin Number ADJ/GND 1 Description Adjustable Voltage Pin or Ground signal for fixed voltage versions. VOUT 2 Output Voltage VIN 3 Input Voltage TAB TAB Tab is connected to VOUT (pin 2) for all packages ORDERING INFORMATION Part Number SPX1587T-L SPX1587T-L/TR SPX1587T-L-1-5 SPX1587T-L-1-5/TR SPX1587T-L-5-0 SPX1587T-L-5-0/TR Junction Temperature Range -40°C≤TJ≤+125°C -40°C≤TJ≤+125°C -40°C≤TJ≤+125°C SPX1587U-L-3-3 -40°C≤TJ≤+125°C SPX1587U-L-5-0 -40°C≤TJ≤+125°C SPX1587AR-L SPX1587AR-L/TR SPX1587AT-L SPX1587AT-L/TR SPX1587AT-L-2-5 SPX1587AT-L-2-5/TR SPX1587AT-L-3-3 SPX1587AT-L-3-3/TR SPX1587AU-L -40°C≤TJ≤+125°C -40°C≤TJ≤+125°C -40°C≤TJ≤+125°C -40°C≤TJ≤+125°C -40°C≤TJ≤+125°C Marking Sipex SPX1587T YYWWLX Sipex SPX1587T 15YYWWLX Sipex SPX1587T 50YYWWLX Sipex SPX1587U 33YYWWLX Sipex SPX1587U 50YYWWLX Sipex SPX1587AR YYWWLX Sipex SPX1587AT YYWWLX Sipex SPX1587AT 25YYWWLX Sipex SPX1587AT 33YYWWLX Sipex SPX1587AU YYWWLX Package TO263-3 TO263-3 TO263-3 Packing Quantity Bulk 500/Tape & Reel Bulk 500/Tape & Reel Bulk 500/Tape & Reel Note 1 Lead Free Lead Free Lead Free TO220-3 Bulk Lead Free TO220-3 Bulk Lead Free TO252-3 TO263-3 TO263-3 TO263-3 TO220-3 Bulk 2K/Tape & Reel Bulk 500/Tape & Reel Bulk 500/Tape & Reel Bulk 500/Tape & Reel Bulk Lead Free Lead Free Lead Free Lead Free Lead Free “YY” = Year – “WW” = Work Week – “L” = Lead Free Indicator – “X” = Lot Number; when applicable. © 2010 Exar Corporation 4/11 Rev. 2.0.0 S P X1 5 8 7 3A Low Dropout Voltage Regulator TYPICAL PERFORMANCE CHARACTERISTICS All data taken at VIN = VOUT + 1.5V, TA = 25°C, CIN = COUT =10µF, IOUT=10mA unless otherwise specified - Schematic and BOM from Application Information section of this datasheet. Fig. 4: Line Regulation for SPX1587U-3-3 IOUT=10mA Fig. 5: VOUT versus Temperature VIN=2.5V, IOUT=10mA Fig. 6: VOUT versus Temperature VIN=4.0V, IOUT=10mA Fig. 7: VOUT versus Temperature VIN=5.0V, IOUT=10mA SOLDERING METHODS APPLICATION INFORMATION The SPX1587 die is attached to the heatsink lead which exits opposite the input, output, and ground pins. OUTPUT CAPACITOR To ensure the stability of the SPX1587, an output capacitor of at least 10μF (ceramic or tantalum) or 22μF (aluminum) is required. The value may change based on the application requirements of the output load or temperature range. The value of ESR can vary based on the type of capacitor used in the applications to guarantee stability. The recommended value for ESR is 0.5Ω or less. A larger value of output capacitance (up to 100μF) can improve the load transient response. © 2010 Exar Corporation THERMAL CHARACTERISTICS The SPX1587 features the internal thermal limiting to protect the device during overload conditions. Special care needs to be taken during continuous load conditions such that the maximum junction temperature does not exceed 125°C. Thermal protection is activated at >179°C and deactivated at