SPX1083 8A Low DropOut Voltage Regulator Adjustable & Fixed 3.3V FEATURES APPLICATIONS • Adjustable Output Down to 1.2V or Fixed 3.3V & 5V • 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 • Powering Intel Pentium µP from +5V Supplies • Power PC Supplies • 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 SPX1083 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 SPX1083 features low dropout of a maximum 1.5 volts. The SPX1083 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 SPX1083 is offered in a 3-pin TO-220 package compatible with older 3-terminal regulators. For a 5A low dropout regulator refer to the SPX1083 datasheet. PIN CONNECTIONS TO-220-3 (U) SPX1083 1 2 3 ADJ/GND VOUT VIN Front View Rev. 10/23/00 SPX1083 ABSOLUTE MAXIMUM RATINGS Power Dissipation..........................................Internally Limited Lead Temp. (Soldering, 10 Seconds) .............................. 300°C Storage Temperature Range ............................ -65° to +150°C Operating Junction Temperature Range SPX1083 Control Section..........................0C° to +125°C SPX1083 Power Transistor........................0C° to +150°C Input Supply Voltage ...................................................... 30V Input to Output Voltage Differential ............................... 30V ELECTRICAL CHARACTERISTICS (Note 1) at IOUT = 10mA, TA = 25°C, unless otherwise specified. Parameter Conditions Typ SPX1083A Min Max Min SPX1083 Max Units 3.3V Version Output Voltage (Note 2) 5.0V Version Output Voltage (Note 2) All Voltage Options Reference Voltage SPX1083-3.3V, 0≤IOUT≤8A, 4.75V≤VIN≤25V 3.3 3.3 3.270 3.240 3.330 3.360 3.230 3.201 3.370 3.399 SPX1083-3.3V, 0≤IOUT≤8A, 6.5V≤VIN≤25V 5.0 5.0 4.950 4.900 5.050 5.100 4.900 4.650 5.100 5.150 1.250 1.250 5 0.015 0.05 0.1 0.2 1.1 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 8.0 Dropout Voltage 10 mA ≤ IOUT ≤ IFULLLOAD 3.3V≤(VIN - VOUT )≤ VIN MAX – VOUT MAX (VIN- VOUT) = VIN MAX – VOUT MAX 29V ≤VIN - VOUT ≤ VIN MAX – VOUT MAX ILOAD = 10mA 10mA ≤ IOUT ≤ IFULLLOAD (VIN - VOUT)=3V IOUT=IFULLLOAD , ∆VREF=1% Current Limit Mid Load Current Line Regulation Load Regulation V V mA % % V VIN - VOUT=5V 9.5 Long Term Stability TA=125°C, 1000Hrs. 0.3 1 1 % Adjust Pin Current TA=25°C 55 90 90 µA 0.2 5 5 µA 0.003 0.01 0.01 %/W Adjust Pin Current Change Thermal Regulation 30ms pulse Temperature Stability Ripple Rejection Ratio Output Noise, RMS Thermal Resistance Junction-to-Case A 8.0 % 0.5 VIN - VOUT=3V IOUT =3A, COUT = 25µF, CADJ = 25µF, f= 120Hz 10Hz to 10kHz TO-220 Junction to Tab Junction to Ambient 75 60 dB 60 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 10µF output capacitor is required on SPX1083 Rev. 10/23/00 SPX1083 TYPICAL CHARACTERISTICS DROPOUT VOLTAGE LOAD REGULATION 0ºC T J 120ºC 1 T J = -55ºC T J =150ºC SHORT CIRCUIT CURRENT (A) INDICATES GUARANTEED TEST POINT -40ºC T J 150ºC T J =25ºC 0.05 0 -0.05 -0.10 -0.15 -0.20 0 0 1 2 3 4 5 6 7 8 9 -50 10 OUTPUT CURRENT (A) 80 7 6 T J =150ºC T J =25ºC 3 2 T J =-55ºC 5 10 15 20 25 50 25 6 -55ºC 4 IFULLLOAD 2 0 75 100 125 150 30 INPUT/OUTPUT DIFFERENTIAL (V) 35 5 10 15 20 25 30 35 INPUT/OUTPUT DIFFERENTIAL (V) TEMPERATURE STABILITY 1.270 70 60 50 40 30 20 1.260 1.250 1.240 10 0 0 0 0 REFERENCE VOLTAGE (V) 90 8 ADJUSTMENT PIN CURRENT (µA) 9 1 150ºC 8 ADJUSTMENT PIN CURRENT 100 4 25ºC INPUT/OUTPUT DIFFERENTIAL (V) 10 5 10 0 -25 MINIMUM OPERATING CURRENT MINIMUM OPERATING CURRENT SHORT CIRCUIT CURRENT 12 0.10 OUTPUT VOLTAGE DEVIATION (%) MINIMUM INPUT/OUTPUT DIFFERENTIAL (V) 2 1.230 -50 -25 0 25 50 75 TEMPERATURE (ºC) 100 125 150 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (ºC) Rev. 10/23/00 SPX1083 TYPICAL APPLICATIONS VIN IN SPX1083 OUT VIN OUT IN C1 C1 Fig. 5 Typical Adjustable Regulator Fig. 4 8A Current output Regulator IN SPX1083 VCC OUT C2 C1 ADJ R1 Intel PentiumTM 3.45V +5V C2 R1 R2 VOUT = VREF (1 + R2 ) + IADJ R2 R1 LOAD VIN VREF ADJ R1 ADJ VOUT SPX1083 R2 Powering Intel PentiumTMwith SPX1083 Pentium Processor is a trademark of Intel Corp. Power PC is a trademark of IBM Corp. Rev. 10/23/00 SPX1083 ORDERING INFORMATION Ordering No. Precision Output Voltage SPX1083U SPX1083U-3.3 SPX1083U-5.0 SPX1083AU SPX1083AU-3.3 SPX1083AT-5.0 2% 2% 2% 1% 1% 1% Adj 3.3V 5.0V Adj 3.3V 5.0V Packages 3 Lead TO-220 3 Lead TO-220 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: [email protected] 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 licens Rev. 10/23/00