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| (R) SPX2815 1.5A Low Dropout Voltage Regulator FEATURES Guaranteed 1.5A Output Current Three Terminal Adjustable or Fixed 2.5V, 3.3V and 5.0V Low Quiescent Current Low Dropout Voltage of 1.1V at 1.5A 0.1% Line and 0.1% Load Regulation Stable with 10uF Ceramic Capacitor Overcurrent and Thermal Protection Available Packages: TO-252, TO-220, and TO-263 Similar to Industry Standard LT1086/ LT1586 APPLICATIONS Desktop PC's Servers Powering VGA and Sound Cards Cordless Phones Battery Chargers Adjustable Power Supplies Portable Instrumentation SMPS Post-Regulator Constant Current Regulators Disk Drives Refer to Page 5 for Pinouts DESCRIPTION The SPX2815 is a low power positive-voltage regulator designed to satisfy moderate power requirements with a cost effective, small footprint solution. This device is an excellent choice for use in battery-powered applications and portable computers. The SPX2815 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. SPX2815 is available in adjustable or fixed 2.5V, 3.3V and 5.0V output voltages. The SPX2815 is offered in several 3-pin surface mount packages: TO-252, TO-220 and TO-263. An output capacitor of 10F ceramic or tantalum provides unconditional stability. FUNCTIONAL DIAGRAM (Adjustable) VIN Current Limit + VOUT ICL _ AMP + 1.25V Thermal Limit + - VREF ADJ/GND IADJ ~ 50A - I TL Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS Power Dissipation.......................................Internally Limited Lead Temperature (soldering, 5 seconds) ...............260C Storage Temperature Range.......................-65C to +150C Operating Junction Temperature Range.....-40C to +125C Input Supply Voltage .................................................... +10V Input to Output Voltage ................................................ +8.8V ESD Rating .............................................................. 2kV min ELECTRICAL CHARACTERISTICS at VIN=VOUT + 1.5V, TA = 25C, CIN = COUT = 10F, IOUT =10mA, unless otherwise specified. The Boldface applies over the full operating temperature range. PARAMETER 2.5V Version Output Voltage 3.30V Version Output Voltage 5.0V Version Output Voltage All Voltage Options Reference Voltage Output Voltage Temperature Stability Line Regulation 1.238 1.250 1.225 0.3 0.1 0.1 0.1 0.1 0.1 0.1 1.00 1.10 4 50 2.5 0.01 60 75 0.03 0.003 0.1 60 0.2 0.2 0.2 0.3 0.3 0.3 1.2 10 120 2.5 0.01 75 0.03 0.003 0.1 1.262 1.225 1.250 1.275 1.212 0.5 0.1 0.1 0.1 0.1 0.1 0.1 1.00 1.10 4 50 0.2 0.2 0.2 0.3 0.3 0.3 1.2 10 120 mA A A %/W dB % % (VIN-VOUT)=5V 25C, 30mS pulse fRIPPLE=120Hz, (VIN-VOUT)=2V, VRIPPLE=1VPP 125C, 1000Hrs % of VOUT, 10Hzf10kHz 1.275 1.287 V % % 4.25VVIN 10V,VOUT=2.5V,IOUT=10mA 4.75VVIN 10V,VOUT=3.3V,IOUT=10mA 6.50VVIN 10V,VOUT=5.0V,IOUT=10mA 10mAIOUT 1.5A, VOUT=2.5V 10mAIOUT 1.5A, VOUT=3.3V 10mAIOUT 1.5A, VOUT=5.0V IOUT=0.5A IOUT=1.5A Fixed voltage versions IOUT=10mA, (VIN - VOUT )= 2V 10mAIOUT 3A, 1.5V(VIN-VOUT) 10V 4.950 5.000 4.900 5.050 4.900 5.000 5.100 4.850 5.100 5.150 V IOUT=10mA, VIN=7V 10mA IOUT 3A, 6.50V VIN 10V 3.267 3.300 3.234 3.333 3.234 3.300 3.366 3.201 3.366 3.399 V IOUT = 10mA, VIN =5V 10mA IOUT 3A, 4.75V VIN 10V MIN TYP SPX2815A 2.475 2.500 2.450 MAX MIN TYP SPX2815 2.525 2.450 2.500 2.550 2.425 2.550 2.575 V IOUT = 10mA, VIN =4.5V 10mA IOUT 3A, 4.25V VIN 10V MAX UNITS CONDITIONS Load Regulation % Dropout Voltage (Note 2) Quiescent Current Adjust Pin Current Current Limit Thermal Regulation Ripple Rejection Long Term Stability RMS Output Noise V Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 2 TYPICAL PERFORMANCE CHARACTERISTICS 1.275 3.325 3.320 1.27 1.265 1.26 1.255 1.25 1.245 1.24 1.235 1.23 1.225 -50 1.25v Adj Vout (V) 3.315 3.310 3.305 3.300 4.5 6.5 8.5 10.5 Vin (V) 12.5 14.5 Vout (V) -30 -10 10 30 50 70 90 110 130 Temp (C) Figure 1. Line Regulation for SPX2815U-3.3; IOUT=10mA Figure 2. VOUT vs Temperature, VIN=2.5V, IOUT=10mA 2.55 2.54 2.53 2.52 2.51 2.5 2.49 2.48 2.47 2.46 2.45 -50 3.38 2.5v Adj 2.5v Fixed 3.36 3.34 Vout (V) 3.3v Adj 3.3v Fixed Vout (V) 3.32 3.3 3.28 -30 -10 10 30 50 Temp (C) 70 90 110 130 3.26 -50 -30 -10 10 30 50 70 90 110 130 Temp (C) Figure 3. VIN=4.0V, IOUT=10mA Figure 4. VIN=5.0V, IOUT=10mA APPLICATION INFORMATION Output Capacitor To ensure the stability of the SPX2815, an output capacitor of at least 10F (ceramic or tantalum) or 22F (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 0.5 or less. A larger value of output capacitance (up to 100F) can improve the load transient response. Soldering Methods continuous load conditions such that the maximum junction temperature does not exceed 125C. Thermal protection is activated at >179C and deactiviated at <165 C. The thermal interaction from other components in the application can effect the thermal resistance of the SPX2815. The actual thermal resistance can be determined with experimentation. SPX2815 power dissipation is calculated as follows: PD = (VIN - VOUT)(IOUT) Maximum Junction Temperature range: TJ = TA(max) + PD* thermal resistance (junction-to-ambient) Maximum junction temperature must not exceed the 125C. The SPX2815 die is attached to the heatsink lead which exits opposite the input, output, and ground pins. Thermal Characteristics The SPX2815 features the internal thermal limiting to protect the device during overload conditions. Special care needs to be taken during Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 3 APPLICATION INFORMATION: Continued Ripple Rejection Ripple rejection can be improved by adding a capacitor between the ADJ pin and ground as shown in Figure 8. When ADJ pin bypassing is used, the value of the output capacitor required increases to its maximum. If the ADJ pin is not bypassed, the value of the output capacitor can be lowered to 22F for an electrolytic aluminum capacitor or 10F for a solid tantalum capacitor (Fig 7). However the value of the ADJ-bypass capacitor should be chosen with respect to the following equation: C = 1 / ( 6.28 * FR * R1 ) Where C = value of the capacitor in Farads (select an equal or larger standard value), FR = ripple frequency in Hz, R1 = value of resistor R1 in Ohms. If an ADJ-bypass capacitor is used, the amplitude of the output ripple will be independent of the output voltage. If an ADJ-bypass capacitor is not used, the output ripple will be proportional to the ratio of the output voltage to the reference voltage: M = VOUT / VREF Where M = multiplier for the ripple seen when the ADJ pin is optimally bypassed. VREF =1.25V Ripple rejection for the adjustable version is shown in Figure 5. Output Voltage The output of the adjustable regulator can be set to any voltage between 1.25V and 15V. The value of VOUT can be quickly approximated using the formula VOUT=1.25 *(R1 + R2)/R1 A small correction to this formula is required depending on the values of resistors R1 and R2, since the adjustable pin current (approx 50A) flows through R2. When IADJ is taken into account, the formula becomes VOUT = VREF(1+ (R2/R1)) + IADJ * R2 where VREF=1.25V Layout Considerations Parasitic line resistance can degrade load regulation. In order to avoid this, connect R1 directly to VOUT as illustrated in Figure 13. For the same reason, R2 should be connected to the negative side of the load. 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 10 100 1000 10000 100000 1000000 Frequency, Hz Ripple Rejection, Db V IN 4.7F + C1 IN SPX2815 ADJ OUT C2 R1 VOUT IOUT = VREF R1 IOUT LOAD Figure 5. Ripple Rejection; Vin=3.3V, Vout=1.8V (adj.), Iload=200mA Figure 6. Current Source Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 4 APPLICATION INFORMATION: Continued (Note A) V IN SPX2815 IN OUT 5V VOUT R1 330 1% 10F VIN 4.7F + C1 IN SPX2815 ADJ I ADJ 50A OUT C2 VREF R1 VOUT + 4.7F ADJ VOUT = V REF (1+R 2 /R1 ) +I ADJ R 2 R2 *C 1 improves ripple rejection. ZC should be ~ R1 at ripple frequency R2 1k, 1% + C1 10F* Note A: VIN(MIN) = (Intended VOUT ) + (V DROPOUT (MAX) ) Figure 7. Typical Adjustable Regulator Figure 8. Improving Ripple Rejection SPX2815 VIN (Note A) ADJ IN OUT 5V 330W 1% + R P Parasitic Line Resistance VIN SPX2815 VOUT + 4.7F TTL Input 1K 2N3904 1k ADJ 10F Connect R to Case of Regulator 1k 1% R1 Connect R2 to Load RL R2 Note A: VIN(MIN) = (Intended VOUT ) + (V ) DROPOUT (MAX) Figure 9. 5V Regulator with Shutdown Figure 10. Recommended Connections for Best Results PINOUTS TO-252 (R) TO-220-3 (U) TO-263-3 (T) 1 2 3 1 2 3 1 2 3 ADJ/GND V OUT V IN ADJ/GND V OUT V IN Front View ADJ/GND V OUT V IN Top View Front View Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 5 PACKAGE: 3 PIN TO-263 E E/2 L1 SEATING PLANE A C2 D H 1 2 3 B B c e See View C b2 b GAUGE PLANE 0-8 A1 View C SEATING PLANE L 3-PIN TO-263 JEDEC TO-263 (AA) Variation A A1 b c D D1 E E1 e H L L1 L2 L3 .575 .070 Dimensions in inches MIN .160 .000 .020 .015 .330 .270 .380 .245 .100 BSC .625 .110 .066 .070 NOM MAX .190 .010 .039 .029 .380 .420 - b WITH PLATING c BASE METAL SECTION B-B .010 BSC 3 PIN TO-263 Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 6 PACKAGE: 3 PIN TO-220 E B A E2 E/2 A SEATING PLANE Q oP A1 H1 D D1 L1 1 CHAMFER OPTIONAL CC D D L e e1 b C A2 A Dimensions in (mm) A A1 A2 b b2 c D D1 D2 E E1 E2 e e1 H1 L1 L2 P Q 3 PIN TO-220 JEDEC TO-220 (AB) Variation MIN NOM MAX .140 .020 .080 .015 .045 .014 .560 .330 .480 .380 .270 - .027 - .190 .055 .115 .040 .070 .024 .650 .355 .507 .420 .350 .030 b WITH PLATING c BASE METAL CONTACT AREA .100 BSC .200 BSC .230 .139 .100 .270 .250 .161 .135 3 PIN TO-220 Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 7 PACKAGE: 3 PIN TO-252 GAUGE PLANE L2 c c L (L1) b C A1 SEATING PLANE O E1 E1/2 WITH PLATING c D1 BASE METAL CONTACT AREA 3 PIN TO-252 JEDEC TO-252 (AA) Variation A1 c D1 E1 H L L1 L2 Dimensions in inches MIN .018 .205 .170 .370 .055 NOM MAX .060 .005 .024 .410 .070 .108 REF .020 BSC 3 PIN TO-252 Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 8 ORDERING INFORMATION PART NUMBERS ACC. TOP MARK OUTPUT VOLTAGE SPX2815AR ............................. 1% .......... SPX2815ARYYWW..............Adj .................. SPX2815AR/TR ....................... 1% .......... SPX2815ARYYWW..............Adj .................. SPX2815AR-2.5 ....................... 1% .......... SPX2815AR25YYWW...........Adj ................. SPX2815AR-2.5/TR ................. 1% .......... SPX2815AR25YYWW...........Adj ................. SPX2815AR-3.3 ....................... 1% .......... SPX2815AR33YYWW...........Adj ................. SPX2815AR-3.3/TR ................. 1% .......... SPX2815AR33YYWW...........Adj ................. SPX2815AR-5.0 ....................... 1% .......... SPX2815AR50YYWW...........Adj ................. SPX2815AR-5.0/TR ................. 1% .......... SPX2815AR50YYWW...........Adj ................. SPX2815AT ............................. 1% ........... SPX2815ATYYWW..............Adj .................. SPX2815AT/TR ....................... 1% ........... SPX2815ATYYWW..............Adj .................. SPX2815AT-2.5 ....................... 1% .......... SPX2815AT25YYWW...........Adj ................. SPX2815AT-2.5/TR ................. 1% .......... SPX2815AT25YYWW...........Adj ................. SPX2815AT-3.3 ....................... 1% .......... SPX2815AT33YYWW...........Adj ................. SPX2815AT-3.3/TR ................. 1% .......... SPX2815AT33YYWW...........Adj ................. SPX2815AT-5.0 ....................... 1% .......... SPX2815AT50YYWW...........Adj ................. SPX2815AT-5.0/TR ................. 1% .......... SPX2815AT50YYWW...........Adj ................. SPX2815AU ............................. 1% .......... SPX2815AUYYWW..............Adj .................. SPX2815AU-2.5 ....................... 1% .......... SPX2815AU25YYWW...........Adj ................. SPX2815AU-3.3 ....................... 1% .......... SPX2815AU33YYWW...........Adj ................. SPX2815AU-5.0 ....................... 1% .......... SPX2815AU50YYWW...........Adj ................. /TR = Tape and Reel Pack quantity is 500 for TO-263 and 2,000 for TO-252. PACKAGE 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-220 3 lead TO-220 3 lead TO-220 3 lead TO-220 Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 9 ORDERING INFORMATION PART NUMBERS ACC. TOP MARK OUTPUT VOLTAGE SPX2815R ............................... 2% ............ SPX2815RYYWW..............Adj ................... SPX2815R/TR ......................... 2% ............ SPX2815RYYWW..............Adj ................... SPX2815R-2.5 ......................... 2% ........... SPX2815R25YYWW...........Adj .................. SPX2815R-2.5/TR ................... 2% ........... SPX2815R25YYWW...........Adj .................. SPX2815R-3.3 ......................... 2% ........... SPX2815R33YYWW...........Adj .................. SPX2815R-3.3/TR ................... 2% ........... SPX2815R33YYWW...........Adj .................. SPX2815R-5.0 ......................... 2% ........... SPX2815R50YYWW...........Adj .................. SPX2815R-5.0/TR ................... 2% ........... SPX2815R50YYWW...........Adj .................. SPX2815T ................................ 2% ............ SPX2815TYYWW..............Adj ................... SPX2815T/TR .......................... 2% ............ SPX2815TYYWW..............Adj ................... SPX2815T-2.5 ......................... 2% ........... SPX2815T25YYWW...........Adj .................. SPX2815T-2.5/TR .................... 2% ........... SPX2815T25YYWW...........Adj .................. SPX2815T-3.3 ......................... 2% ........... SPX2815T33YYWW...........Adj .................. SPX2815T-3.3/TR .................... 2% ........... SPX2815T33YYWW...........Adj .................. SPX2815T-5.0 ......................... 2% ........... SPX2815T50YYWW...........Adj .................. SPX2815T-5.0/TR .................... 2% ........... SPX2815T50YYWW...........Adj .................. SPX2815U ............................... 2% ............ SPX2815UYYWW..............Adj ................... SPX2815U-2.5 ......................... 2% ........... SPX2815U25YYWW...........Adj .................. SPX2815U-3.3 ......................... 2% ........... SPX2815U33YYWW...........Adj .................. SPX2815U-5.0 ......................... 2% ........... SPX2815U50YYWW...........Adj .................. /TR = Tape and Reel Pack quantity is 500 for TO-263 and 2,000 for TO-252. PACKAGE 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-252 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-263 3 lead TO-220 3 lead TO-220 3 lead TO-220 3 lead TO-220 Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 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 herein; neither does it convey any license under its patent rights nor the rights of others. Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator (c) Copyright 2004 Sipex Corporation 10 |
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