MAX38888

PRODUCTION

2.5V–5.0V, 0.5A/2.5A Reversible Buck/Boost Regulator for Backup Power Applications

Continua^™ Family of Backup Power Regulators Using Super Capacitor or Capacitor Bank

Data Sheet (Rev. 5) Product Selection Table

Part Models: 2
1ku List Price: Starting From $3.91

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Overview

2.5V to 5V System Output Voltage
0.8V to 4.5V Cap Voltage Range
Up to 2.5A Peak Inductor Discharge Current
Programmable Voltage and Current Thresholds
±2% Threshold Accuracy
Up to 95% Efficiency, Charge or Discharge
2.5µA Ready Quiescent Current
Small Solution Size

3mm x 3mm x 0.75mm TDFN Package

The MAX38888 is a storage capacitor or capacitor bank backup regulator designed to efficiently transfer power between a storage element and a system supply rail in reversible buck and boost operations using the same inductor.

When the main supply is present and above the minimum system supply voltage, the regulator operates in buck mode and charges the storage element at up to 500mA peak inductor current. Once the storage element is charged, the circuit draws only 2.5µA of current while it maintains the super capacitor or other storage element in its ready state. When the main supply is removed, the regulator operates in boost mode and prevents the system from dropping below the minimum operating voltage, discharging the storage element at up to 2.5A peak inductor current.

The MAX38888 is externally programmable for minimum and maximum voltage of the storage element, such as super capacitor, minimum system voltage, and maximum charge and discharge currents. The internal DC/DC converter requires only a 1µH inductor.

Applications

Handheld Industrial Equipment
Portable Computers
Portable Devices with a Removable Battery

Part Models: 2
1ku List Price: Starting From $3.91

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX38888ATD+	Thin Dual Flatpack No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX38888ATD+T	Thin Dual Flatpack No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 27, 2024 - 2400 ASSEMBLY
		pcn_2400
MAX38888ATD+	PRODUCTION
MAX38888ATD+T	PRODUCTION
Apr 27, 2024 - 2419A ASSEMBLY
		pcn_2419a
MAX38888ATD+	PRODUCTION
MAX38888ATD+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

EE-Sim Power® Tools 1

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

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Evaluation Kits

Evaluation Kit for the MAX38888

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Features and Benefits

2.99V to 3.36V System Output Voltage Range
1.42V to 2.71V Super Cap Voltage Range
2.5A Peak Discharge Current
Resistor Adjustable Voltage and Current Thresholds
Proven 2-Layer 2oz Copper PCB Layout
Demonstrates Compact Solution Size
Fully Assemble and Tested

Product Details

The MAX38888 evaluation kit (EV kit) evaluates the MAX38888 IC. The MAX38888 is a super cap backup regulator designed to transfer power between a super cap and a system supply rail. When the main battery is present and above the minimum system supply voltage, the regulator charges the super cap at up to a 500mA rate. Once the super cap is charged, the circuit draws only 2.5μA of current while it maintains the super cap in its ready state. When the main battery is removed, the regulator prevents the system from dropping below the minimum operating voltage, discharging the super cap at up to a 2.5A rate. The MAX38888 is externally programmable for minimum and maximum super cap voltage, minimum system voltage, and maximum charge and discharge currents. The internal DC/DC converter requires only a 1μH inductor.

Applications

Handheld Industrial Equipment
Portable Computers
Portable Devices with a Removable Battery

Resources

MAX38888EVKIT ODB File - Design Files
6/27/2023

MAX38888EVKIT BOM
5/15/2023

Latest Discussions

2 Years Ago

MAX38888

Overview

Documentation

Data Sheet 1

Design Note 3

Technical Articles 1

Video 1

Book & eBook 1