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MAX1639

Maxim
Part Number MAX1639
Manufacturer Maxim
Description High-Speed Step-Down Controller
Published May 6, 2005
Detailed Description 19-1337; Rev 0; 2/98 KIT ATION EVALU E L B A AVAIL High-Speed Step-Down Controller with Synchronous Rectification for ...
Datasheet PDF File MAX1639 PDF File

MAX1639
MAX1639

Overview
19-1337; Rev 0; 2/98 KIT ATION EVALU E L B A AVAIL High-Speed Step-Down Controller with Synchronous Rectification for CPU Power ________________General Description The MAX1639 is an ultra-high-performance, step-down DC-DC controller for CPU power in high-end computer systems.
Designed for demanding applications in which output voltage precision and good transient response are critical for proper operation, it delivers over 35A from 1.
1V to 4.
5V with ±1% total accuracy from a +5V ±10% supply.
Excellent dynamic response corrects output transients caused by the latest dynamically clocked CPUs.
This controller achieves over 90% efficiency by using synchronous rectification.
Flying-capacitor bootstrap circuitry drives inexpensive, external N-channel MOSFETs.
The switching frequency is pin-selectable for 300kHz, 600kHz, or 1MHz.
High switching frequencies allow the use of a small surface-mount inductor and decrease output filter capacitor requirements, reducing board area and system cost.
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