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LM2639 Datasheet PDF - National ->Texas Instruments

Part NameDescriptionManufacturer
LM2639 5-Bit Programmable, High Frequency Multi-phase PWM Controller National-Semiconductor
National ->Texas Instruments National-Semiconductor
Other PDF  no available.
LM2639 Datasheet PDF : LM2639 pdf   
LM2639 image

General Description
The LM2639 provides an attractive solution for power supplies of high power microprocessors (such as Pentium II™, M II™, K6™-2, K6™-3, etc.) exhibiting ultra fast load transients. Compared to a conventional single-phase supply, an LM2639 based multi-phase supply distributes the thermal and electrical loading among components in multiple phases and greatly reduces the corresponding stress in each component. The LM2639 can be programmed to control either a 3-phase converter or a 4-phase converter.
   
Features
■ Ultra fast load transient response
■ Enables all surface-mount-design
■ Selectable 2, 3, 4 phase operation
■ Clock frequency from 40 kHz to 10 MHz
■ Precision load current sharing
■ 5-bit programmable from 3.5V to 1.3V
■ VID code compatible to VRM 8.X specification
■ Output voltage is 2.0V for VID code 11111
■ Selectable internal or external clock
■ Digital 16-step soft start
■ Input under-voltage lock-out, over-current protection
   
Applications
■ Servers and workstations
■ High current, ultra-fast transient microprocessors
   

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