SPX2815 ® 1.5A Low Dropout Voltage Regulator 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 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 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 10µF ceramic or tantalum provides unconditional stability. FUNCTIONAL DIAGRAM (Adjustable) VIN + Current Limit VOUT ICL Thermal Limit _ AMP + 1.25V VREF + – ADJ/GND IADJ ~ 50µA – I TL Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator 1 © Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS Operating Junction Temperature Range.....-40°C to +125°C Input Supply Voltage .................................................... +10V Input to Output Voltage ................................................ +8.8V ESD Rating .............................................................. 2kV min Power Dissipation.......................................Internally Limited Lead Temperature (soldering, 5 seconds) ...............260°C Storage Temperature Range.......................-65°C to +150°C ELECTRICAL CHARACTERISTICS at VIN=VOUT + 1.5V, TA = 25°C, CIN = COUT = 10µF, IOUT =10mA, unless otherwise specified. The Boldface applies over the full operating temperature range. PARAMETER MIN 2.5V Version Output Voltage TYP MAX MIN SPX2815A TYP MAX UNITS CONDITIONS SPX2815 2.475 2.500 2.450 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 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 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 1.238 1.250 1.225 1.262 1.225 1.250 1.275 1.212 1.275 1.287 V IOUT=10mA, (VIN - VOUT )= 2V 10mA≤IOUT≤ 3A, 1.5V≤(VIN-VOUT)≤ 10V 3.30V Version Output Voltage 5.0V Version Output Voltage All Voltage Options Reference Voltage Output Voltage Temperature Stability 0.3 Line Regulation 0.1 0.1 0.1 0.2 0.2 0.2 0.1 0.1 0.1 0.2 0.2 0.2 % 4.25V≤VIN≤ 10V,VOUT=2.5V,IOUT=10mA 4.75V≤VIN≤ 10V,VOUT=3.3V,IOUT=10mA 6.50V≤VIN≤ 10V,VOUT=5.0V,IOUT=10mA Load Regulation 0.1 0.1 0.1 0.3 0.3 0.3 0.1 0.1 0.1 0.3 0.3 0.3 % 10mA≤IOUT≤ 1.5A, VOUT=2.5V 10mA≤IOUT≤ 1.5A, VOUT=3.3V 10mA≤IOUT≤ 1.5A, VOUT=5.0V Dropout Voltage (Note 2) 1.00 1.10 1.00 1.10 V 1.2 1.2 IOUT=0.5A IOUT=1.5A 4 10 4 10 mA Fixed voltage versions 50 120 50 120 µA A (VIN-VOUT)=5V 0.01 0.1 %/W 25°C, 30mS pulse 75 dB fRIPPLE=120Hz, (VIN-VOUT)=2V, VRIPPLE=1VPP Quiescent Current Adjust Pin Current Current Limit 2.5 Thermal Regulation Ripple Rejection 0.5 2.5 0.01 60 % 75 0.1 60 Long Term Stability 0.03 0.03 % 125°C, 1000Hrs RMS Output Noise 0.003 0.003 % % of VOUT, 10Hz≤f≤10kHz Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator 2 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 1.275 3.325 1.27 3.315 Vout (V) Vout (V) 3.320 3.310 3.305 3.300 4.5 6.5 8.5 10.5 12.5 14.5 1.265 1.26 1.255 1.25 1.245 1.24 1.235 1.23 1.225 -50 1.25v Adj -30 -10 10 Vin (V) 70 90 110 130 Figure 2. VOUT vs Temperature, VIN=2.5V, IOUT=10mA 3.38 2.5v Adj 2.5v Fixed 3.3v Adj 3.3v Fixed 3.36 3.34 Vout (V) Vout (V) 50 Temp (C) Figure 1. Line Regulation for SPX2815U-3.3; 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 30 3.32 3.3 3.28 -30 -10 10 30 50 Temp (C) 70 90 110 3.26 -50 130 -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 continuous load conditions such that the maximum junction temperature does not exceed 125°C. Thermal protection is activated at >179°C and deactiviated at <165 °C. To ensure the stability of the SPX2815, 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. 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) Soldering Methods The SPX2815 die is attached to the heatsink lead which exits opposite the input, output, and ground pins. Maximum junction temperature must not exceed the 125°C. 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 3 © Copyright 2004 Sipex Corporation APPLICATION INFORMATION: Continued Ripple Rejection Ripple rejection for the adjustable version is shown in Figure 5. 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 22µF for an electrolytic aluminum capacitor or 10µF for a solid tantalum capacitor (Fig 7). 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 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. A small correction to this formula is required depending on the values of resistors R1 and R2, since the adjustable pin current (approx 50µA) flows through R2. When IADJ is taken into account, the formula becomes VOUT = VREF(1+ (R2/R1)) + IADJ * R2 where VREF=1.25V 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 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. Where M = multiplier for the ripple seen when the ADJ pin is optimally bypassed. Ripple Rejection, Db VREF =1.25V 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 V IN IN 4.7µF + SPX2815 VOUT OUT C1 C2 ADJ R1 10 100 1000 10000 100000 IOUT = 1000000 VREF IOUT LOAD R1 Frequency, Hz Figure 6. Current Source Figure 5. Ripple Rejection; Vin=3.3V, Vout=1.8V (adj.), Iload=200mA Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator 4 © Copyright 2004 Sipex Corporation APPLICATION INFORMATION: Continued SPX2815 (Note A) V IN VIN SPX2815 IN 4.7µF + 4.7µF VOUT ADJ R1 330Ω 1% C2 C1 VREF ADJ I ADJ 50µA R1 10µF *C 1 improves ripple rejection. ZC should be ~ R1 at ripple frequency R2 VOUT = V REF (1+R 2 /R1 ) +I ADJ R 2 Note A: VIN(MIN) = (Intended VOUT ) + (V Figure 7. Typical Adjustable Regulator VIN (Note A) 330W 1% + ADJ + 4.7µF DROPOUT (MAX) ) VOUT ADJ 10µF Connect R to Case of Regulator R1 1kΩ 1% 1k C1 10µF* SPX2815 1K 2N3904 + R P Parasitic Line Resistance 5V OUT IN R2 1kΩ, 1% Figure 8. Improving Ripple Rejection SPX2815 VIN TTL Input 5V OUT + VOUT OUT IN Connect R2 to Load RL R2 Note A: VIN(MIN) = (Intended VOUT ) + (VDROPOUT (MAX) ) Figure 9. 5V Regulator with Shutdown Figure 10. Recommended Connections for Best Results PINOUTS TO-252 (R) 1 2 TO-220-3 (U) 3 V OUT 2 1 1 ADJ/GND TO-263-3 (T) 2 3 3 V IN ADJ/GND Front View ADJ/GND V OUT V IN Top View V OUT V IN Front View Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator 5 © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-263 SEATING PLANE E A E/2 C2 L1 H D 1 2 3 B B c e See View C b b2 SEATING PLANE GAUGE PLANE 0º-8º A1 L 3-PIN TO-263 JEDEC TO-263 (AA) Variation Dimensions in inches MIN A .160 - .190 A1 .000 - .010 b .020 - .039 c .015 - D .330 D1 .270 E E1 .380 - .380 - .420 .245 - - WITH PLATING c .100 BSC H .575 - .625 L .070 - .110 L1 - - .066 L2 - - .070 L3 b .029 - e View C NOM MAX BASE METAL SECTION B-B .010 BSC 3 PIN TO-263 Date: 5/17/04 SPX2815 1.5A Low Dropout Voltage Regulator 6 © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-220 E A B E/2 E2 SEATING PLANE A øP Q A1 H1 D D1 L1 CHAMFER OPTIONAL 1 D C C D L b e A C e1 A2 Dimensions in (mm) 3 PIN TO-220 JEDEC TO-220 (AB) Variation MIN .140 - .190 A1 .020 - .055 A2 .080 - .115 b .015 .027 .040 b2 .045 - .070 c .014 - .024 D D1 .560 - .650 D2 .330 .480 - .355 .507 E E1 E2 .380 .270 - - .420 .350 .030 b WITH PLATING c BASE METAL CONTACT AREA .100 BSC e e1 Date: 5/17/04 NOM MAX A .200 BSC H1 L1 .230 - .270 - - .250 L2 - - - ∆P Q .139 - .100 - 3 PIN TO-220 .161 .135 SPX2815 1.5A Low Dropout Voltage Regulator 7 © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-252 GAUGE PLANE L2 c C c L O SEATING PLANE A1 (L1) b E1 WITH PLATING E1/2 c D1 BASE METAL CONTACT AREA 3 PIN TO-252 JEDEC TO-252 (AA) Variation MIN A1 - c .018 D1 E1 Date: 5/17/04 Dimensions in inches NOM MAX - .205 .170 .005 - .024 - - - H .370 - .410 L .055 .060 .070 L1 .108 REF L2 .020 BSC 3 PIN TO-252 SPX2815 1.5A Low Dropout Voltage Regulator 8 © Copyright 2004 Sipex Corporation 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 ................. 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 /TR = Tape and Reel Pack quantity is 500 for TO-263 and 2,000 for TO-252. 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 9 © Copyright 2004 Sipex Corporation 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 .................. 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 /TR = Tape and Reel Pack quantity is 500 for TO-263 and 2,000 for TO-252. 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 10 © Copyright 2004 Sipex Corporation