SPX1587 Solved by TM 3A Low Dropout Voltage Regulator FEATURES ■ Guaranteed 3A Output Current ■ Three Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V, 3.3V and 5.0V ■ Low Quiescent Current ■ Low Dropout Voltage: 1.1V at 3A ■ Line Regulation: 0.1% ■ Load Regulation: 0.1% ■ Stable with 10uF Ceramic Capacitor ■ Overcurrent and Thermal Protection ■ Similar to Industry Standard LT1085/ LT1585 ■ Available in RoHS Compliant, Lead Free Packages: TO-252, TO-220, and TO-263 SPX1587 3 Pin TO-263 1 2 SPX1587 3 3 Pin TO-220 1 ADJ/GND VOUT 2 3 VIN ADJ/GND VOUT VIN APPLICATIONS ■ ■ ■ ■ ■ ■ ■ Desktop PC's Servers Powering VGA and Sound Cards Cordless Phones Battery Chargers Adjustable Power Supplies Portable Instrumentation SMPS Post-Regulator DESCRIPTION The SPX1587 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 SPX1587 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. SPX1587 is available in adjustable or fixed 1.5V, 1.8V, 2.5V, 3.3V and 5.0V output voltages. The SPX1587 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 VREF + – Jun8-07 Rev D ADJ/GND I TL SPX1587 Low-Dropout Voltage Regulator IADJ ~ 50µA – Thermal Limit _ AMP + 1.25V © 2007 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 Specifications are at VIN=VOUT + 1.5V, TA = 25°C, CIN = COUT = 10µF, IOUT =10mA, unless otherwise specified. The z denotes the specifications which apply full operating temperature range -40°C to +85°C, unless otherwise specified. PARAMETER MIN 1.5V Version Output Voltage TYP MAX MIN SPX1587A TYP MAX UNITS CONDITIONS SPX1587 1.485 1.470 1.500 1.515 1.530 1.470 1.455 1.500 1.530 1.545 V 1.782 1.764 1.800 1.818 1.836 1.764 1.746 1.800 1.836 1.854 V 2.475 2.450 2.500 2.525 2.550 2.450 2.425 2.500 2.550 2.575 V 3.267 3.234 3.300 3.333 3.366 3.234 3.201 3.300 3.366 3.399 V 4.950 4.900 5.000 5.050 5.100 4.900 4.850 5.000 5.100 5.150 V 1.238 1.225 1.250 1.262 1.275 1.225 1.212 1.250 1.275 1.287 V z IOUT = 10mA, VIN =3.5V 10mA )I OUT ) 3A, 3.0V )V IN ) 10V z IOUT = 10mA, VIN =3.8V 10mA )I OUT ) 3A, 3.3V )V IN ) 10V z IOUT = 10mA, VIN =4.5V 10mA )I OUT ) 3A, 4.25V )V IN ) 10V z IOUT = 10mA, VIN =5V 10mA )I OUT ) 3A, 4.75V )V IN ) 10V z IOUT=10mA, VIN=7V 10mA )I OUT ) 3A, 6.50V )V IN ) 10V z IOUT=10mA, (VIN - VOUT )= 2V 10mA)IOUT) 3A, 1.5V)(VIN-VOUT)) 10V 1.8V Version Output Voltage 2.5V Version Output Voltage 3.3V 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 0.1 0.1 0.2 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 0.2 % 3.0V)VIN) 10V,VOUT=1.5V 3.3V)VIN) 10V,VOUT=1.8V 4.25V)VIN) 10V,VOUT=2.5V 4.75V)VIN) 10V,VOUT=3.3V 6.50V)VIN) 10V,VOUT=5.0V Load Regulation 0.1 0.1 0.1 0.1 0.1 0.3 0.3 0.3 0.3 0.3 0.1 0.1 0.1 0.1 0.1 0.3 0.3 0.3 0.3 0.3 % 10mA)IOUT) 3A, VOUT=1.5V 10mA)IOUT) 3A, VOUT=1.8V 10mA)IOUT) 3A, VOUT=2.5V 10mA)IOUT) 3A, VOUT=3.3V 10mA)IOUT) 3A, VOUT=5.0V Dropout Voltage (Note 2) 1.00 1.05 1.10 V 1.2 1.00 1.05 1.10 1.2 IOUT=1A IOUT=2A IOUT=3A 4 10 4 10 mA Quiescent Current 4 10 4 10 mA Adjust Pin Current 50 Minimum Load Current (Note 4) Current Limit 3.2 Thermal Regulation Ripple Rejection 75 50 120 5 0.01 60 0.5 3.2 0.1 75 Fixed voltage versions µA 120 5 0.01 60 % z A 0.1 %/W dB (VIN-VOUT)=2V 25°C, 30mS pulse FRIPPLE=120Hz, (VIN-VOUT)=2V, VRIPPLE=1VPP Long Term Stability 0.03 0.03 % 125°C, 1000Hrs RMS Output Noise 0.003 0.003 % % of VOUT, 10Hz)f)10kHz Thermal Resistance 3 29.4 3 31.4 6 50 3 29.4 3 31.4 6 50 °C/W Jun8-07 Rev D SPX1587 Low-Dropout Voltage Regulator TO-220 Junction to Case, at Tab TO-220 Junction to Ambient TO-263 Junction to Case, at Tab TO-263 Junction to Ambient TO-252 Junction to Case, at Tab TO-252 Junction to Ambient © 2007 Sipex Corporation ELECTRICAL CHARACTERISTICS: Continued (Notes) NOTES: Note 1: Output temperature coefficient is defined as the worst case voltage change divided by the total temperature range Note 2: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account. Note 3: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied. excluding load or line regulation effect. Note 4: Adjustable Version Only. TYPICAL PERFORMANCE CHARACTERISTICS 3.325 1.275 3.320 1.265 1.25v Adj 1.27 Vout (V) Vout (V) 1.26 3.315 3.310 1.255 1.25 1.245 1.24 3.305 1.235 1.23 3.300 4.5 6.5 8.5 10.5 12.5 1.225 -50 14.5 Vin (V) Figure 1. Line Regulation for SPX1587U-3.3; IOUT=10mA -10 10 30 50 70 Temp (C) 90 110 130 Figure 2. VOUTvs Temperature, V IN=2.5V, IOUT=10mA 3.38 2.55 2.5v Adj 2.5v Fixed 2.54 3.3v Adj 3.3v Fixed 3.36 2.53 Vout (V) 2.52 Vout (V) -30 2.51 2.5 2.49 3.34 3.32 3.3 2.48 2.47 3.28 2.46 2.45 -50 -30 -10 10 30 50 70 90 3.26 -50 110 130 -30 Temp (°C) 10 30 50 70 90 110 130 Temp (C) Figure 4. VIN=5.0V, IOUT=10mA Figure 3. VIN=4.0V, IOUT=10mA Jun8-07 Rev D -10 SPX1587 Low-Dropout Voltage Regulator © 2007 Sipex Corporation APPLICATION INFORMATION Output Capacitor However the value of the ADJ-bypass capacitor should be chosen with respect to the following equation: C = 1 / ( 6.28 * FR* R 1) 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. To ensure the stability of the SPX1587, 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 0.51 or less. A larger value of output capacitance (up to 100µF) can improve the load transient response. 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 Soldering Methods The SPX1587 die is attached to the heatsink lead which exits opposite the input, output, and ground pins. Thermal Characteristics Where M = multiplier for the ripple seen when the ADJ pin is optimally bypassed. The SPX1587 features the internal thermal limiting to protect the device during overload conditions. Special care needs to be taken during 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. VREF=1.25V Ripple rejection for the adjustable version is shown in Figure 5. The thermal interaction from other components in the application can effect the thermal resistance of the SPX1587. The actual thermal resistance can be determined with experimentation. 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 SPX1587 power dissipation is calculated as follows: PD= (V IN- V OUT)(IOUT) VOUT=1.25 *(R1+ R 2)/R1 Maximum Junction Temperature range: TJ= T A(max) + PD* eJA (junction-to-ambient thermal resistance) 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 Maximum junction temperature must not exceed 125°C. Ripple Rejection VOUT= V REF(1+ (R2/R1)) + IADJ* R 2 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). Jun8-07 Rev D 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. SPX1587 Low-Dropout Voltage Regulator © 2007 Sipex Corporation APPLICATION INFORMATION: Continued 0 -10 Ripple Rejection, Db -20 V IN -30 SPX1587 IN 4.7µF + -40 VOUT OUT C1 C2 ADJ -50 -60 IOUT= -70 R1 IOUT VREF LOAD R1 -80 -90 10 100 1000 10000 100000 1000000 Frequency, Hz Figure 6. Current Source Figure 5. Ripple Rejection; Vin=3.3V, Vout=1.8V (adj.), Iload=200mA SPX1587 (Note A) V IN VIN 4.7µF + C1 SPX1587 IN ADJ I ADJ 50µA VOUT = V REF (1+R 2 /R1 ) +I ADJR VOUT OUT VREF R 1 IN 4.7µF ADJ 10µF *C 1 improves ripple rejection. ZCshould be ~ R1 at ripple frequency R2 2 + C1 10µF* DROPOUT (MAX)) R PParasitic Line Resistance VIN VOUT SPX1587 3301 1% 4.7µF 1k1 TTL Input 5V OUT ADJ + R2 1k1, 1% Figure 8. Improving Ripple Rejection SPX1587 (Note A) R1 3301 1% C2 Figure 7. Typical Adjustable Regulator IN VOUT + Note A: VIN(MIN) = (Intended VOUT ) + (V VIN 5V OUT 2N3904 + ADJ 10µF Connect R to Case of Regulator R 1 1k1 1k1 Connect R2 to Load 1% R2 RL Note A: VIN(MIN)= (Intended V OUT ) + (VDROPOUT (MAX) ) Figure 9. 5V Regulator with Shutdown Jun8-07 Rev D Figure 10. Recommended Connections for Best Results SPX1587 Low-Dropout Voltage Regulator © 2007 Sipex Corporation PINOUTS Note that TAB is connected to VOUTfor all 3 package types. TO-252 (R) 1 2 TO-220-3 (U) 3 1 ADJ/GND V OUT 2 TO-263-3 (T) 1 3 2 3 V IN ADJ/GND Front View ADJ/GND V OUT V IN V OUT V IN Top View Front View Jun8-07 Rev D SPX1587 Low-Dropout Voltage Regulator © 2007 Sipex Corporation Package: 3 pin T0-252 Jun8-07 Rev D SPX1587 Low-Dropout Voltage Regulator © 2007 Sipex Corporation Package: 3 pin T0-220 Jun8-07 Rev D SPX1587 Low-Dropout Voltage Regulator © 2007 Sipex Corporation Package: 3 pin T0-263 Jun8-07 Rev D SPX1587 Low-Dropout Voltage Regulator © 2007 Sipex Corporation ORDERING INFORMATION PART NUMBER Accuracy OUTPUT VOLTAGE PACKAGE SPX1587AR ................... 1% ............................. Adj ....................................3 lead TO-252 SPX1587AR/TR ............. 1% ............................. Adj ................................... 3 lead TO-252 SPX1587AR-1-5 ............. 1% ............................ 1.5V ................................. 3 lead TO-252 SPX1587AR-1-5/TR ....... 1% ............................ 1.5V ................................. 3 lead TO-252 SPX1587AR-1-8 ............. 1% ............................ 1.8V ................................. 3 lead TO-252 SPX1587AR-1-8/TR ....... 1% ............................ 1.8V ................................. 3 lead TO-252 SPX1587AR-2-5 ............. 1% ............................ 2.5V ................................. 3 lead TO-252 SPX1587AR-2-5/TR ....... 1% ............................ 2.5V ................................. 3 lead TO-252 SPX1587AR-3-3 ............. 1% ............................ 3.3V ................................. 3 lead TO-252 SPX1587AR-3-3/TR ....... 1% ............................ 3.3V ................................. 3 lead TO-252 SPX1587AR-5-0 ............. 1% ............................ 5.0V ................................. 3 lead TO-252 SPX1587AR-5-0/TR ....... 1% ............................ 5.0V ................................. 3 lead TO-252 SPX1587AT .................... 1% ............................. Adj ................................... 3 lead TO-263 SPX1587AT/TR .............. 1% ............................. Adj ................................... 3 lead TO-263 SPX1587AT-1-5 ............. 1% ............................ 1.5V .................................. 3 lead TO-263 SPX1587AT-1-5/TR ....... 1% ............................ 1.5V .................................. 3 lead TO-263 SPX1587AT-1-8 ............. 1% ............................ 1.8V .................................. 3 lead TO-263 SPX1587AT-1-8/TR ....... 1% ............................ 1.8V .................................. 3 lead TO-263 SPX1587AT-2-5 ............. 1% ............................ 2.5V .................................. 3 lead TO-263 SPX1587AT-2-5/TR ....... 1% ............................ 2.5V .................................. 3 lead TO-263 SPX1587AT-3-3 ............. 1% ............................ 3.3V .................................. 3 lead TO-263 SPX1587AT-3-3/TR ....... 1% ............................ 3.3V .................................. 3 lead TO-263 SPX1587AT-5-0 ............. 1% ............................ 5.0V .................................. 3 lead TO-263 SPX1587AT-5-0/TR ....... 1% ............................ 5.0V .................................. 3 lead TO-263 SPX1587AU ................... 1% ............................. Adj ................................... 3 lead TO-220 SPX1587AU-1-5 ............. 1% ............................ 1.5V ................................. 3 lead TO-220 SPX1587AU-1-8 ............. 1% ............................ 1.8V ................................. 3 lead TO-220 SPX1587AU-2-5 ............. 1% ............................ 2.5V ................................. 3 lead TO-220 SPX1587AU-3-3 ............. 1% ............................ 3.3V ................................. 3 lead TO-220 SPX1587AU-5-0 ............. 1% ............................ 5.0V ................................. 3 lead TO-220 Available in lead free packaging. To order add “-L” suffix to part number. Example: SPX1587AU-5-0/TR = standard; SPX1587AU-L-5-0/TR = lead free /TR = Tape and Reel Pack quantity is 500 for TO-263 and 2,000 for TO-252. For status updates, http://www.sipex.com/productDetails.aspx?varpart=SPX1587AR-L Solved by Sipex Corporation TM 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. Jun8-07 Rev D SPX1587 Low-Dropout Voltage Regulator 10 © 2007 Sipex Corporation ORDERING INFORMATION PART NUMBER Accuracy OUTPUT VOLTAGE PACKAGE SPX1587R ...................... 2% ........................... Adj .................................. 3 SPX1587R/TR ................ 2% ........................... Adj ................................... 3 SPX1587R-1-5 ............... 2% .......................... 1.5V ................................. 3 SPX1587R-1-5/TR ......... 2% .......................... 1.5V ................................. 3 SPX1587R-1-8 ............... 2% .......................... 1.8V ................................. 3 SPX1587R-1-8/TR ......... 2% .......................... 1.8V ................................. 3 SPX1587R-2-5 ............... 2% .......................... 2.5V ................................. 3 SPX1587R-2-5/TR ......... 2% .......................... 2.5V ................................. 3 SPX1587R-2-8 ............... 2% .......................... 2.8V ................................. 3 SPX1587R-2-8/TR ......... 2% .......................... 2.8V ................................. 3 SPX1587R-2-85 ............. 2% ......................... 2.85V ................................. 3 SPX1587R-2-85/TR ....... 2% ......................... 2.85V ................................. 3 SPX1587R-3-3 ............... 2% .......................... 3.3V ................................. 3 SPX1587R-3-3/TR ......... 2% .......................... 3.3V ................................. 3 SPX1587R-5-0 ............... 2% .......................... 5.0V ................................. 3 SPX1587R-5-0/TR ......... 2% .......................... 5.0V ................................. 3 SPX1587T ...................... 2% ........................... Adj ................................... 3 SPX1587T/TR ................ 2% ........................... Adj ................................... 3 SPX1587T-1-5 ................ 2% .......................... 1.5V ................................. 3 SPX1587T-1-5/TR .......... 2% .......................... 1.5V ................................. 3 SPX1587T-1-8 ................ 2% .......................... 1.8V ................................. 3 SPX1587T-1-8/TR .......... 2% .......................... 1.8V ................................. 3 SPX1587T-2-5 ................ 2% .......................... 2.5V ................................. 3 SPX1587T-2-5/TR .......... 2% .......................... 2.5V ................................. 3 SPX1587T-3-3 ................ 2% .......................... 3.3V ................................. 3 SPX1587T-3-3/TR .......... 2% .......................... 3.3V ................................. 3 SPX1587T-5-0 ................ 2% .......................... 5.0V ................................. 3 SPX1587T-5-0/TR .......... 2% .......................... 5.0V ................................. 3 SPX1587U ...................... 2% ........................... Adj ................................... 3 SPX1587U-1-5 ............... 2% .......................... 1.5V ................................. 3 SPX1587U-1-8 ............... 2% .......................... 1.8V ................................. 3 SPX1587U-2-5 ............... 2% .......................... 2.5V ................................. 3 SPX1587U-3-3 ............... 2% .......................... 3.3V ................................. 3 SPX1587U-5-0 ............... 2% .......................... 5.0V ................................. 3 lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead lead TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-252 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 Available in lead free packaging. To order add “-L” suffix to part number. Example: SPX1587T-5.0/TR = standard; SPX1587T-L-5.0/TR = lead free /TR = Tape and Reel Pack quantity is 500 for TO-263 and 2,000 for TO-252. For status updates, http://www.sipex.com/productDetails.aspx?varpart=SPX1587AR-L . Sipex Corporation Solved by TM Jun8-07 Rev D 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. SPX1587 Low-Dropout Voltage Regulator 11 © 2007 Sipex Corporation