ZL8801ALAFTK

Overview

The ZL8801ALAFTK is a dual phase PMBus ChargeMode DC/DC digital controller by Renesas. It supports output voltages from 0.54V to 5.5V with an input range of 4.5V to 14V. The device features a switching frequency range of 200kHz to 1.33MHz and operates within a temperature range of -40°C to +85°C. Packaged in a 44-lead QFN (7.0 x 7.0 mm), it provides up to 8 phases when paralleled. Key electrical parameters include 1% output voltage accuracy, cycle-by-cycle peak current protection, and integrated NVRAM for fault storage.

Feature Summary

• ChargeMode control enables compensation-free stability and single-cycle transient response
• Proprietary DDC serial bus facilitates inter-IC communication and sequencing
• Configurable for standalone MOSFET drivers or integrated DrMOS devices

Applications

• High-current server power supplies
• Telecommunications infrastructure
• Industrial equipment power systems

Procurement Notes

Verify component authenticity through authorized channels due to discontinuation status. Confirm package integrity and moisture sensitivity level handling requirements prior to assembly. Cross-reference datasheet revisions to ensure compatibility with existing design specifications and firmware configurations.

Selection Notes

Select this controller for applications requiring high transient response without external compensation networks. Consider the DDC interface for simplified multi-phase synchronization. Evaluate thermal performance and output current capabilities against specific load requirements before implementation.

Part Context

Part of the ZL8800 series digital power management family. Designed for high-performance DC/DC conversion with advanced digital control features. Replaces legacy analog controllers by reducing passive component count and improving dynamic performance.

Replacement Considerations

ZL8801ALAF is a documented alternative variant within the same product line.