PRELIMINARY PAC27A02 CALIFORNIA MICRO DEVICES P/ACTIVE PRECISION VOLTAGE DIVIDER NETWORK FOR LINEAR TECHNOLOGY LTC1266/LT1431 Features Provides a complete Pentium regulator solution when combined with a Linear Technology LTC1266/LT1431 Power Supply Regulator Circuit Miniature SOT and SOIC packages Thin film tightly ratio matched resistors using P/Active technology Applications Linear Technology Pentium 54/55C Power Supply Regulator Y R A Refer to AP-202 Voltage Divider Application Note for further information. Product Description CAMDs P/Active 27A02 Precision Voltage Divider Network is designed to work with the Linear Technology LTC1266 Synchronous Regulator Controller and LT1431 Programmable Reference commonly used in Pentium P54/P55C power regulator designs. CAMDs P/Active technology provides precision ratio tracking over temperature/time required for proper voltage regulation by the Pentium processor. N I SCHEMATIC CONFIGURATION STANDARD SPECIFICATIONS Absolute Tolerance (R) Ratio Tracking (0°C ≤ TA ≤ 70°C) (Voltage per resistor < 10 volts and power resistor <25mW) R1/R2 (R1+R2)/R3 Operating Temperature Range Power Rating/Resistor Storage Temperature Package Power Rating ±5% M I L ±1.0% ±0.25% 0°C to 70°C 25mW @ 70°C -65°C to 150°C 0.225W @ 70°C E R STANDARD VALUES Resistor (R) Value R1 R2 R3 P Package - Narrow Pins Style 4 8 1150 13 50 10 00 STANDARD PART ORDE RING INFORMATION Ordering Part Number Bags Tubes Tape & Reel SOT-143 SOIC PAC27A02S/T PAC27A02T/B - PAC27A02T/R PAC27A02S/R Part Marking A02T PAC27A02S C0860400 © 2000 California Micro Devices Corp. All rights reserved. 4/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1 PRELIMINARY PAC27A02 CALIFORNIA MICRO DEVICES Application Diagram Y R A N I M I L PRELIMINARY Switch Mode Regulator E R Application Diagram P Linear Regulator ©2000 California Micro Devices Corp. All rights reserved. 2 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 4/00