SC1566 Datasheet | SEMTECH

Description The SC1566 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 3 Amps. Since it has superior dropout characteristics pared to regular LDOs, it can be used to supply 2.5V on motherboards or 2.8V on peripheral cards from the 3.3V supply thus allowing heat sink size reduction or elimination. Additionally, the five pin versions of SC1566 have an enable pin, to further reduce power dissipation while shut down. The SC1566 provides excellent regulation over variations in line, load and temperature. The SC1566 is available as three terminal fixed output voltage and five terminal fixed or adjustable output voltage devices with enable. Two package options are available: TO-263 and TO-220. Very Low Dropout 3.0 Amp Regulator With Enable Features u 350m V dropout @ 3A u Adjustable output from 1.2V to 4.8V u 2.5V and 1.8V options (5 pin parts also adjustable u u u u u u u u u u u u externally using resistors) Over current and over temperature protection Enable pin 10µA quiescent current in shutdown Low reverse leakage (output to input) Full industrial temperature range TO-220 and TO-263 packages Applications Battery powered systems Motherboards and notebook puters Peripheral cards Network cards Set top boxes Medical equipment Typical Application Circuits(1)(2) U1 SC1566I5T-2.5 VIN ENABLE 1 2 VIN EN VO ADJ 5 4 VO = See equation below GND 3 R1 VO = C2 R2 C1 1.200 (R1+ R2) Volts R2 U1 SC1566I5T-2.5 VIN ENABLE C1 1 2 VIN EN VO ADJ 5 4 C2 VO = 2.5V GND 3 U1 SC1566IT-1.8 VIN 1 VIN VO 3 VO = 1.8V GND C1 2 C2 Notes: (1) Maximum VO setpoint for 1.8V parts = 5.4V (2) This device is designed to operate with ceramic input and output capacitors .semtech. Revision 1, January 2001 POWER MANAGEMENT Absolute Maximum Ratings Parameter Input Voltage Power D i ssi pati on Thermal Resi stance Juncti on to Ambi ent SC 1566IM (TO-263) SC 1566IT (TO-220) Thermal Resi stance Juncti on...