MAX1898

PRODUCTION

Linear Charger for Single-Cell Li+ Battery

Data Sheet (Rev. 0) Product Selection Table

Part Models: 4
1ku List Price: Starting From $1.89

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Overview

Simple, Safe Linear Charger

Uses Low-Cost PNP or PMOS Pass Element

4.5V to 12V Input Range

Internal Current-Sense Resistor

±0.75% Voltage Accuracy

Programmable Charging Current

Automatic Input Power-Source Detection

LED Charge Status Indicator

Programmable Safety Timer

Current-Sense Monitor Output

Optional/Adjustable Auto-Restart

Small µMAX Package

The MAX1898, with an external PNP or PMOS transistor, forms a complete charger for 1-cell lithium-ion (Li+) batteries. The MAX1898 provides accurate constant-current/constant-voltage charging. Battery regulation voltage accuracy is ±0.75% for optimum battery performance and cycle life. Charging current is user set, but is sensed internally so no external current-sense resistor is needed. The MAX1898 also provides outputs to monitor charge status, presence-of-input power source, and charge current. Additional features include shutdown, optional charge-cycle restart without input-power cycling, selectable charge termination safety timer, and low-current preconditioning for deeply discharged cells.

The MAX1898 offers the maximum integration and functionality in the smallest, most basic application circuit possible. Very few external components are required.

The MAX1898 offers two versions to safely charge all Li+ battery chemistries. The battery regulation voltage is 4.2V for the MAX1898EUB42 and 4.1V for the MAX1898EUB41. Both are available in a 10-pin ultra-thin µMAX package.

Applications

Cell Phones
Cradle Chargers
PDAs
Self-Charging Battery Packs
Single-Cell Li+ Powered Portables

Part Models: 4
1ku List Price: Starting From $1.89

Documentation

Data Sheet 1

MAX1898: Linear Charger for Single-Cell Li+ Battery Data Sheet (Rev.0) 02/14/2002

Technical Articles 2

Switch-Mode, Linear, and Pulse Charging Techniques for Li+ Battery in Mobile Phones and PDAs 08/02/2002

How to Minimize Power Dissipation in Li+ Linear Chargers 02/21/2002

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
MAX1898EUB41+	10-MINI_SO-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX1898EUB41+T	10-MINI_SO-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX1898EUB42+	10-MINI_SO-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX1898EUB42+T	10-MINI_SO-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Sep 19, 2018 - 1753N ASSEMBLY
		pcn_1753n
MAX1898EUB42+	PRODUCTION
MAX1898EUB42+T	PRODUCTION

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

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX1898

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Features and Benefits

Simple Stand-Alone Li+ Charger

Safely Pre-Charges Deeply-Discharged Cells

Top-Off Charging to Achieve Full Battery Capacity

Fully Assembled and Tested

Product Details

The MAX1898 evaluation kit (EV kit) is a complete, fully assembled and tested single-cell lithium-ion (Li+) battery charger. The EV kit charges a single Li+ battery to 4.2V using a power supply with an output voltage of 4.7V to 12V. At input voltages greater than 6V, the allowed charging current may be limited by the power-dissipation rating of the external MOSFET. Jumpers on the EV kit allow simple adjustment to the total charging time and charger restart voltage levels. An LED indicates the cell's charging status. To charge a Li+ battery to 4.1V, replace the MAX1898 (U1) IC on the EV kit board with the MAX1898EUB41.