SPX1083AU

SPX1083 8A Low DropOut Voltage Regulator Adjustable & Fixed 3.3V FEATURES • 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 APPLICATIONS • 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 3.3V Version Output Voltage (Note 2) 5.0V Version Output Voltage (Note 2) 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 VIN - VOUT=3V IOUT =3A, COUT = 25µF, CADJ = 25µF, f= 120Hz 10Hz to 10kHz TO-220 Junction to Tab Junction to Ambient SPX1083-3.3V, 0≤IOUT≤8A, 4.75V≤VIN≤25V SPX1083-3.3V, 0≤IOUT≤8A, 6.5V≤VIN≤25V 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% VIN - VOUT=5V TA=125°C, 1000Hrs. TA=25°C 3.3 3.3 5.0 5.0 1.250 1.250 5 0.015 0.05 0.1 0.2 1.1 9.5 0.3 55 0.2 30ms pulse 0.003 0.5 75 60 60 3.270 3.240 4.950 4.900 1.238 1.225 3.330 3.360 5.050 5.100 1.262 1.270 10 0.2 0.5 0.3 0.4 1.2 3.230 3.201 4.900 4.650 1.238 1.225 3.370 3.399 5.100 5.150 1.262 1.270 10 0.2 0.5 0.3 0.4 1.2 V mA % % V A 1 90 5 0.01 % µA µA %/W % dB V Conditions Typ SPX1083A Min Max Min SPX1083 Max Units 8.0 1 90 5 0.01 8.0 Output Noise, RMS Thermal Resistance Junction-to-Case 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 SHORT CIRCUIT CURRENT 2 MINIMUM INPUT/OUTPUT DIFFERENTIAL (V) OUTPUT VOLTAGE DEVIATION (%) 0.05 0 -0.05 -0.10 -0.15 -0.20 SHORT CIRCUIT CURRENT (A) INDICATES GUARANTEED TEST POINT -40ºC T J 150ºC 0ºC T J 120ºC 0.10 12 10 8 6 4 2 0 -25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 -55ºC IFULLLOAD 25ºC 150ºC 1 T J =25ºC T J =150ºC T J = -55ºC 0 01 2 3 4 5 67 8 9 10 -50 OUTPUT CURRENT (A) MINIMUM OPERATING CURRENT INPUT/OUTPUT DIFFERENTIAL (V) ADJUSTMENT PIN CURRENT INPUT/OUTPUT DIFFERENTIAL (V) TEMPERATURE STABILITY 10 9 MINIMUM OPERATING CURRENT ADJUSTMENT PIN CURRENT (µA) 100 90 REFERENCE VOLTAGE (V) 1.270 8 7 6 5 4 3 2 1 0 0 5 10 15 20 25 30 35 T J =-55ºC T J =25ºC T J =150ºC 80 70 60 50 40 30 20 10 0 -50 -25 0 25 50 75 100 125 150 1.260 1.250 1.240 1.230 -50 -25 0 25 50 75 100 125 150 INPUT/OUTPUT DIFFERENTIAL (V) TEMPERATURE (ºC) TEMPERATURE (ºC) Rev. 10/23/00 SPX1083 TYPICAL APPLICATIONS VIN C1 IN SPX1083 ADJ OUT R1 VIN C1 OUT IN SPX1083 ADJ VREF C2 R1 VOUT LOAD VOUT = VREF (1 + R2 ) + IADJ R2 R1 R2 Fig. 4 8A Current output Regulator Fig. 5 Typical Adjustable Regulator Intel PentiumTM 3.45V VIN +5V C1 ADJ R1 IN SPX1083 VCC C2 OUT R2 T Powering Intel Pentium Mwith 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. SPX1083U SPX1083U-3.3 SPX1083U-5.0 SPX1083AU SPX1083AU-3.3 SPX1083AT-5.0 Precision 2% 2% 2% 1% 1% 1% Output Voltage 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: 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 licens Rev. 10/23/00