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MAX1855 - High-Speed / Adjustable / Synchronous Step-Down Controllers with Integrated Voltage Positioning

General Description

The MAX1716/MAX1854/MAX1855 step-down controllers are intended for core CPU DC-DC converters in notebook computers.

They feature a dynamically adjustable output (5-bit DAC), ultra-fast transient response, high DC accuracy, and high efficiency needed for leading-edge CPU core power supplies.

Key Features

  • MAX1716/MAX1854/MAX1855 Typical Operating Circuit +5V INPUT VCC SHDN ILIM REF VDD V+ BST DH OUTPUT.

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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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19-1758; Rev 0; 8/00 High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning General Description The MAX1716/MAX1854/MAX1855 step-down controllers are intended for core CPU DC-DC converters in notebook computers. They feature a dynamically adjustable output (5-bit DAC), ultra-fast transient response, high DC accuracy, and high efficiency needed for leading-edge CPU core power supplies. Maxim's proprietary Quick-PWM™ quick-response, constant-ontime PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The MAX1716/MAX1854/MAX1855 are designed specifically for CPU core applications requiring a voltage-positioned supply.