SPX1580 Datasheet | Sipex

FEATURES - Low Dropout Voltage 540m V at 7A Full Load Current - Adjustable Ouput Down to 1.25V from ATX Power Supply - Fixed Output Voltages of 3.3V and 2.5V - Extremely Tight Load and Line Regulation - Standard 5-Terminal Low Cost TO-220 and TO-263 ADJ OR FIXED SENSE VCNTRL VOUT VIN 5 Pin TO-220 5 Pin TO-263 1 2 3 4 5 - Replacement to Industry Standard LT1580 APPLICATIONS ADJ OR FIXED SENSE - 3.3V ATX Power Supplies - 3.3V to 2.9V for Portable PENTIUMTM Processor - 5V to 3.5V VRE Supply - High efficiency "Green" puter Systems Now Available in Lead Free Packaging DESCRIPTION The SPX1580 is a 7A Low Dropout Regulator with extremely low dropout voltage. The adjustable version requires only two external resistors to set the output voltage. The fixed version has a preset output of 3.3V or 2.5V and does not require any external resistors. The SPX1580 features a low dropout of 540m V(Typ.) and offers fast transient response. This device is suitable for Pentium applications requiring 2.5V from 3.3V ATX power supplies, where a low current input voltage 1V greater than the output voltage is available. With an external sense pin the load regulation is less than 1m V. This device is an excellent choice for the use of powering low voltage microprocessors that require a lower dropout, fast transient response to regulate from 3.3V and 5V supplies. The SPX1580 is also an excellent choice as a post regulator for switching supplies applications. The SPX1580 offers protection against over-current faults, reversed input polarity, over temperature operation and positive and negative transient voltage. The SPX1580 is offered in a 5 pin TO-220 and TO-263 patible with industry standard 5-terminal regualtors. For 5A, 3A and 1.5A ultra low dropout versions refer to SPX1581, SPX1582 and SPX1583 data sheets respectively. TYPICAL APPLICATIONS CIRCUITS 3.3V VIN 5V VCTRL VIN C1 33µF VCTRL 5 SPX1580 4 2 ADJ C2 10µF R2 124Ω 1 SENSE R1 124Ω C4 68µF C2...