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MAX1638 - High-Speed Step-Down Controller

General Description

The MAX1638 is an ultra-high-performance, step-down DC-DC controller for CPU power in high-end computer systems.

Key Features

  • such as a digitally programmable output; adjustable transient response; and selectable 0.5%, 1%, or 2% AC load regulation. Fast recovery from load transients is ensured by a GlitchCatcher™ current-boost circuit that eliminates delays caused by the buck inductor. Output overvoltage protection is enforced by a crowbar circuit that turns on the low-side MOSFET with 100% duty factor when the output is 200mV above the normal regulation point. Other features include internal digital soft-start, a powe.

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Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
MAX1630 Multi-Output / Low-Noise Power-Supply Controllers
MAX1631 Multi-Output / Low-Noise Power-Supply Controllers
MAX1632 Multi-Output / Low-Noise Power-Supply Controllers
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MAX1635 Multi-Output / Low-Noise Power-Supply Controllers

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-1313; Rev 0; 11/97 KIT ATION EVALU E L B AVAILA High-Speed Step-Down Controller with Synchronous Rectification for CPU Power _______________General Description The MAX1638 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 1.3V to 3.5V 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.