SPX1587T-3.3-TR

SPX1587 ® 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 ■ Available Packages: TO-252, TO-220, and TO-263 ■ Similar to Industry Standard LT1085/ LT1585 SPX1587 3 Pin TO-263 1 2 SPX1587 3 3 Pin TO-220 1 ADJ/GND VOUT 2 3 VIN ADJ/GND VOUT VIN Now Available in Lead Free Packaging 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 Thermal Limit _ AMP + 1.25V VREF + – ADJ/GND IADJ ~ 50µA – I TL Date: 5/25/04 SPX1587 3A 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 Specifications are at VIN=VOUT + 1.5V, TA = 25°C, CIN = COUT = 10µF, IOUT =10mA, unless otherwise specified. The ♦ 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 1.485 1.470 1.500 1.782 1.764 1.800 2.475 2.450 2.500 3.267 3.234 3.300 4.950 4.900 5.000 1.238 1.225 1.250 TYP MAX UNITS 1.530 1.545 V 1.836 1.854 V 2.550 2.575 V 3.366 3.399 V 5.100 5.150 V 1.275 1.287 V CONDITIONS SPX1587 1.515 1.530 1.470 1.455 1.500 1.818 1.836 1.764 1.746 1.800 2.525 2.550 2.450 2.425 2.500 3.333 3.366 3.234 3.201 3.300 5.050 5.100 4.900 4.850 5.000 1.262 1.275 1.225 1.212 1.250 ♦ IOUT = 10mA, VIN =3.5V 10mA ≤ IOUT ≤ 3A, 3.0V ≤ VIN ≤ 10V ♦ IOUT = 10mA, VIN =3.8V 10mA ≤ IOUT ≤ 3A, 3.3V ≤ VIN ≤ 10V ♦ IOUT = 10mA, VIN =4.5V 10mA ≤ IOUT ≤ 3A, 4.25V ≤ VIN ≤ 10V ♦ IOUT = 10mA, VIN =5V 10mA ≤ IOUT ≤ 3A, 4.75V ≤ VIN ≤ 10V ♦ IOUT=10mA, VIN=7V 10mA ≤ IOUT ≤ 3A, 6.50V ≤ VIN ≤ 10V ♦ 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) 0.5 50 120 Current Limit 3.2 Thermal Regulation Ripple Rejection 5 0.01 60 75 % ♦ 120 3.2 0.1 5 0.01 60 75 Fixed voltage versions µA 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 60 3 60 6 126 3 60 3 60 6 126 °C/W Date: 5/25/04 SPX1587 3A Low Dropout Voltage Regulator 2 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 © Copyright 2004 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 -30 -10 10 Figure 1. Line Regulation for SPX1587U-3.3; IOUT=10mA 50 70 90 110 130 Figure 2. VOUT vs Temperature, VIN=2.5V, IOUT=10mA 3.38 2.55 3.3v Adj 3.3v Fixed 2.5v Adj 2.5v Fixed 2.54 3.36 2.53 Vout (V) 2.52 Vout (V) 30 Temp (C) Vin (V) 2.51 2.5 3.34 3.32 2.49 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 Date: 5/25/04 -10 SPX1587 3A Low Dropout Voltage Regulator 3 © Copyright 2004 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 * 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. 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 0.5Ω 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. Where M = multiplier for the ripple seen when the ADJ pin is optimally bypassed. Thermal Characteristics 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