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LM2638 Key Features

  • 2345 Provides 3 regulated voltages
  • Power Good flag and output enable
  • Charge pump pin
  • Switching Section
  • Synchronous rectification
  • 5-bit DAC programmable down to 1.3V
  • Typical ±1% DAC tolerance
  • Switching frequency: 50 kHz to 1 MHz
  • Over-voltage protection
  • Two methods of over-current protection

Other LM2638 Datasheets

Manufacturer Part Number Description
National Semiconductor Logo National Semiconductor LM2638 Motherboard Power-Supply Solution

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LM2638 Description

The LM2638 provides a prehensive 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 regulator controllers in a 24-pin SO package. In a typical application, the switching controller supplies the MPU core, and...

LM2638 Applications

  • Embedded power supplies for motherboards