MAX77859AEWO+T

Overview

The MAX77859AEWO+T is a high-efficiency buck-boost converter from Analog Devices, designed for systems requiring a wide input voltage range of 2.5 V to 22 V. It delivers up to 6 A in buck mode and 4 A in boost mode (at VIN=3.7 V, VOUT=5 V), with a typical switch current of 7.8 A. The device features I2C programmable output voltage (3.2 V to 16 V internally) and dynamic voltage scaling (DVS) with 20 mV steps. It supports USB-C PPS with 50 mA current limit resolution and operates in SKIP or FPWM modes.

Feature Summary

• Supports wide input voltage range from 2.5 V to 22 V
• Enables dynamic voltage scaling via I2C interface
• Optimized for USB-C Power Delivery and Programmable Power Supply applications
• Configurable switching frequency and loop compensation

Applications

• USB-C Power Delivery (PD) and Programmable Power Supply (PPS) chargers
• Portable electronics requiring wide input voltage tolerance
• Industrial and automotive power systems with varying supply rails
• Battery-powered devices needing efficient step-up/step-down conversion

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm that the 'A' variant includes the necessary I2C programmability for USB-C PPS requirements. Ensure the WLP package dimensions align with your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component for applications demanding high efficiency across a broad input voltage spectrum. The I2C interface allows for precise output voltage adjustment and current limiting, making it suitable for smart charging solutions. Consider thermal management due to the high switch current capabilities and compact WLP footprint.

Part Context

This part belongs to the MAX77859 family of buck-boost regulators. It is distinct from the non-PPS optimized MAX77859B and offers advanced programmability compared to fixed-output converters. The device integrates protection features including overcurrent, overtemperature, and short-circuit protection within a small form factor.

Replacement Considerations

Direct substitutes are not explicitly listed in public documentation. Evaluate other MAX77859 variants or similar Analog Devices buck-boost converters based on input voltage range, current capability, and package compatibility.