IRU1261CM

Data Sheet No. PD94139 IRU1261 DUAL 6A AND 1A LOW DROPOUT POSITIVE FIXED 1.5V AND 2.5V REGULATOR DESCRIPTION The IRU1261, using a proprietary process, combines a dual low dropout regulator 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 IITM processor applications. 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 APPLICATIONS Pentium IITM Processor Applications TYPICAL APPLICATION 3.3V C1 VOUT1 VIN 5 4 3 2 1 C4 C2 C3 2.5V / 1A IRU1261 Gnd VOUT2 1.5V / 6A VCTRL 5V R1 Figure 1 - Typical application of IRU1261 in a Pentium IITM processor application. Note: Pentium IITM is trademark of Intel Corp. PACKAGE ORDER INFORMATION TJ (°C) 0 To 150 5-PIN PLASTIC TO-263 (M) IRU1261CM 5-PIN PLASTIC Ultra Thin-PakTM (P) IRU1261CP Rev. 2.0 09/19/02 www.irf.com 1 IRU1261 ABSOLUTE MAXIMUM RATINGS Input Voltage (V IN) .................................................... Power Dissipation ..................................................... Storage Temperature Range ...................................... Operating Junction Temperature Range ..................... 7V Internally Limited -65°C To 150°C 0°C To 150°C PACKAGE INFORMATION 5-PIN PLASTIC TO-263 (M) 5 4 3 2 1 5-PIN ULTRA THIN-PAKTM (P) 5 4 3 2 1 VOUT1 VIN Gnd VOUT2 VCTRL V OUT1 V IN Gnd V OUT2 V CTRL θJA=308C/W for 1"sq pad θJA=308C/W for 1"sq pad ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over C =1m F, COUT=100m F and T =0 to 1508C. Typical IN J values refer to TJ=258C. IFL=6A for output #2 and 1A for output #1. VCTRL=5V, VIN=3.3V. PARAMETER VCTRL Input Voltage Output Voltage #2 Output Voltage #1 Line Regulation Load Regulation (Note 1) Dropout Voltage (Output #2) Dropout Voltage (Output #1) Current Limit (Output #2) Current Limit (Output #1) Minimum Load Current Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise SYM VO2 VO1 TEST CONDITION Io=10mA, TJ=25°C Io=10mA Io=10mA, TJ=25°C Io=10mA Io=10mA, 3.1V