US1261

US1261 DUAL 6A AND 1A LOW DROPOUT POSITIVE FIXED OUTPUT REGULATOR FEATURES Guaranteed to provide 1.5V and 2.5V Supplies with 3.1V input. Fast Transient Response 1% Voltage Reference Initial Accuracy Built in Thermal Shutdown DESCRIPTION The US1261 product using a proprietary process combines a dual low dropout regulators with fixed outputs of 1.5V and 2.5V in a single package with the 1.5V output having a minimum of 6A and the 2.5V having a 1A output current capability. This product is specifically designed to provide well regulated supplies from 3.3V to generate 1.5V for GTL+ termination resistor supply and 2.5V clock supply for the new generation of the Pentium II processor applications. APPLICATIONS Pentium II Processor Applications TYPICAL APPLICATION 3.3V C1 Vout1 Vin 5 4 3 2 1 C4 C2 C3 2.5V / 1A US1261 Gnd Vout2 Vctrl 1.5V / 6A 1261app1-1.3 5V R1 Typical application of US1261 in a Pentium II processor application PACKAGE ORDER INFORMATION Tj (°C) 0 TO 150 5 PIN PLASTIC TO220(T) US1261CT 5 PIN PLASTIC TO263(M) US1261CM 5 PIN PLASTIC POWER FLEX(P) US1261CP Rev. 1.7 3/22/99 3-1 US1261 ABSOLUTE MAXIMUM RATINGS Input Voltage (Vin) ............................................................. 10V Power Dissipation ............................................ Internally Limited Storage Temperature Range ................................ -65°C TO 150°C Operating Junction Temperature Range ...................... 0°C TO 150°C PACKAGE INFORMATION 7 PIN PLASTIC TO22...