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| SPX1584 8A Low Dropout Voltage Regulator Adjustable & Fixed 3.3V FEATURES * Adjustable Output Down to 1.2V or Fixed 3.3V * Output Current of 8A * Low Dropout Voltage * Extremely Tight Load and Line Regulation * Current & Thermal Limiting * Standard 3-Terminal Low Cost TO-220 * Similar to Industry Standard LT1083/LT1584 APPLICATIONS * Powering Intel Pentium P from +5V Supplies * Power PCSupplies * SMPS Post-Regulator * High Efficiency "Green" Computer Systems * High Efficiency Linear Power Supplies * Portable Instrumentation * Constant Current Regulators * Adjustable Power Supplies * Battery Charger PRODUCT DESCRIPTION The SPX1584 is a low power 8A Adjustable Voltage Regulator that is very easy to use. It requires only 2 external resistors to set the output voltage. This device is an excellent choice when using Powering Intel Microprocessor to convert from +5V to 3.3V supplies, and as a post regulator for switching supplies applications. The SPX1584 features low dropout of a maximum 1.5 volts. The SPX1584 offers full protection against over-current faults, reversed input polarity, reversed load insertion, over temperature operation, and positive and negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. The IQ of this device flows into the load, which increases efficiency. The SPX1584 is offered in a 3-pin TO-220 package compatible with older 3-terminal regulators. For a 5A low dropout regulator refer to the SPX1585 datasheet. PIN CONNECTIONS TO-220-3 (U) SPX1584 1 2 3 ADJ/GND VOUT VIN Front View Date: 04/29/04 SPX1584 ABSOLUTE MAXIMUM RATINGS Power Dissipation..........................................Internally Limited Lead Temp. (Soldering, 10 Seconds) .............................. 300C Storage Temperature Range ............................ -65 to +150C Operating Junction Temperature Range SPX1584 Control Section..........................0C to +125C SPX1584 Power Transistor........................0C to +150C Input Supply Voltage .................................................... +10V Input to Output Voltage Differential .............................. 8.8V ELECTRICAL CHARACTERISTICS (Note 1) at IOUT = 10mA, TA = 25C, unless otherwise specified. Parameter 3.3V Version Output Voltage (Note 2) SPX1584-3.3V, 0IOUT1.5A, 4.75VVIN7V 3.3 3.3 3.270 3.240 3.330 3.360 3.230 3.201 3.370 3.399 V Conditions Typ SPX1584A Min Max Min SPX1584 Max Units All Voltage Options Reference Voltage Mid Load Current Line Regulation Load Regulation Dropout Voltage Current Limit Long Term Stability Adjust Pin Current Adjust Pin Current Change Thermal Regulation Temperature Stability Ripple Rejection Ratio 10mA IOUT IFULLLOAD 3.3V(VIN - VOUT ) VIN MAX - VOUT MAX (VIN- VOUT) = VIN MAX - VOUT MAX 1.5V VIN - VOUT VIN MAX - VOUT MAX ILOAD = 10mA 10mA IOUT IFULLLOAD (VIN - VOUT)=3V IOUT=IFULLLOAD , VREF=1% VIN - VOUT=5V TA=125C, 1000Hrs. TA=25C 1.250 1.250 5 0.015 0.05 0.1 0.2 1.1 9.5 0.3 55 0.2 1.238 1.225 1.262 1.270 10 0.2 0.5 0.3 0.4 1.2 1.238 1.225 1.262 1.270 10 0.2 0.5 0.3 0.4 1.2 V mA % % V A 8.0 1 90 5 0.01 8.0 1 90 5 0.01 % A A %/W % 30ms pulse 0.003 0.5 Output Noise, RMS Thermal Resistance Junction-to-Case VIN - VOUT=3V IOUT =3A, COUT = 25F, CADJ = 25F, f= 120Hz 10Hz to 10kHz TO-220 Junction to Tab Junction to Ambient 75 60 60 dB 0.003 2.7 0.65 2.7 0.65 % VO C/W The Bold specifications apply to the full operating temperature range. Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 2: A 10F output capacitor is required on SPX1584 Date: 04/29/04 SPX1584 TYPICAL CHARACTERISTICS Date: 04/29/04 SPX1584 TYPICAL APPLICATIONS VIN C1 IN SPX1584 ADJ OUT VIN C1 IN SPX1584 ADJ OUT C2 VREF R1 VOUT R1 LOAD VOUT = VREF 1+ R2 + IADJ R2 R1 R2 8A Current Output Regulator Typical Adjustable Regulator Intel PentiumTM VIN +5V C1 IN SPX1584 3.45V OUT C2 VCC ADJ R1 R2 Powering Intel PentiumTM with SPX1584 Pentium Processor is a trademark of Intel Corp. Power PC is a trademark of IBM Corp. Date: 04/29/04 SPX1584 ORDERING INFORMATION Ordering No. SPX1584U SPX1584U-3.3 SPX1584AU SPX1584AU-3.3 Precision 2% 2% 1% 1% Output Voltage Adj 3.3V Adj 3.3V Packages 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Main Offices: 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 935-7600 FAX: (408) 934-7500 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. Date: 04/29/04 |
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