LM2638 Datasheet (National Semiconductor) - Motherboard Power-Supply Solution

LM2638, Motherboard Power-Supply Solution

The LM2638 provides a comprehensive embedded power supply solution for motherboards hosting high performance MPUs such as Pentium™ II, M II™, K6™-2 and other similar high performance MPUs.

The LM2638 incorporates a 5-bit programmable, synchronous buck switching controller and two high-speed linear r

LM2638 Features

* n Provides 3 regulated voltages n Power Good flag and output enable n Charge pump pin Switching Section n Synchronous rectification n 5-bit DAC programmable down to 1.3V n Typical ± 1% DAC tolerance n Switching frequency: 50 kHz to 1 MHz n Over-voltage protection n Two methods of over-current protec