MAX1632AEAI+

Overview

The MAX1632AEAI+ is a triple-output power management integrated circuit designed for notebook computer applications. It integrates two synchronous buck switching controllers and one low-dropout linear regulator within a single package. The device operates with an input voltage range of +4.2V to +30V, providing dual adjustable outputs between 2.5V and 5.5V, alongside a fixed 12V output capable of delivering 120mA from the internal linear regulator. Operating at a switching frequency of 200kHz to 300kHz, it utilizes pulse-width modulation to achieve high efficiency across varying load conditions.

Feature Summary

• Integrates dual synchronous buck controllers and a dedicated 12V linear regulator for comprehensive system power generation
• Features programmable power-on sequencing and a low-active-low reset signal for reliable system startup
• Includes internal overvoltage and undervoltage protection mechanisms on the main switching outputs
• Supports selectable fixed or adjustable output modes for flexible voltage configuration

Applications

• Notebook computer motherboard power supply units
• Portable digital assistant (PDA) logic power systems
• Battery-powered mobile electronic devices requiring multiple voltage rails
• Systems utilizing Intel Pentium processor architectures

Procurement Notes

Verify component authenticity through authorized distributors due to discontinuation status. Confirm RoHS compliance documentation matches current manufacturing standards. Check for specific suffix variations that may indicate tape-and-reel packaging versus tube quantities. Ensure replacement components maintain identical pinout compatibility and thermal characteristics for existing board layouts.

Selection Notes

Select this component when designing legacy notebook systems requiring integrated buck and LDO regulation. Consider the limited availability and discontinued status for new designs. Evaluate alternative PMICs if higher switching frequencies or additional output channels are required. Verify that the SSOP-28 package fits the available PCB real estate constraints.

Part Context

This part belongs to the MAX1630–MAX1635 series of multi-output power-supply controllers developed by Maxim Integrated. These devices were specifically engineered for portable computing platforms to reduce component count and improve power density. The MAX1632 variant distinguishes itself by including an integrated 12V linear regulator, unlike other series members that focus solely on switching regulation.

Replacement Considerations

Public confirmed substitute part numbers: MAX1632EAI+, MAX1632AEAI-T.