Dual Power Supply Controller for Desktop Systems

GENERAL DESCRIPTION The ADP3156 is a highly efficient synchronous buck switching regulator controller optimized for converting the 3.3 V or 5 V main supply into lower supply voltages required on the motherboards of Pentium® III and other high performance processor systems. FEATURES Active

8.4 VOLT NOMINAL ZENER VOLTAGE 5

• MONOLITHIC TEMPERATURE COMPENSATED ZENER REFERENCE CHIPS • ALL JUNCTIONS COMPLETELY PROTECTED WITH SILICON DIOXIDE • 8.4 VOLT NOMINAL ZENER VOLTAGE + 5 • ELECTRICALLY SIMILAR TO 1N3154 THRU 1N3156 • COMPATIBLE WITH ALL WIRE BONDING AND DIE ATTACH TECHNIQUES, WITH THE EXCEPTION OF SOLDER REFL

TEMPERATURE COMPENSATED ZENER REFERENCE DIODES

• 1N3154UR-1 THRU 1N3157UR-1 AVAILABLE IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/158 • TEMPERATURE COMPENSATED ZENER REFERENCE DIODES • LEADLESS PACKAGE FOR SURFACE MOUNT • 8.4 VOLT NOMINAL ZENER VOLTAGE • METALLURGICALLY BONDED, DOUBLE PLUG CONSTRUCTION

TEMPERATURE COMPENSATED ZENER REFERENCE DIODES

• 1N3154UR-1 THRU 1N3157UR-1 AVAILABLE IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/158 • TEMPERATURE COMPENSATED ZENER REFERENCE DIODES • LEADLESS PACKAGE FOR SURFACE MOUNT • 8.4 VOLT NOMINAL ZENER VOLTAGE • METALLURGICALLY BONDED, DOUBLE PLUG CONSTRUCTION

CMOS System Reset

Outline This IC is a system reset IC developed using the CMOS process. Super low consumption current of 0.25µA typ. has been achieved through use of the CMOS process. Also, detection voltage is high precision detection of ±2. Features 1. Super low consumption current 0.25µA typ. (when VDD