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All versions are No Longer Available.

Data Sheet

FULL DATA SHEET (PDF, 352kB) Download   E-Mail

Description

The MAX1666 provides complete protection against overvoltage, undervoltage, overcharge current, overdischarge current, and cell mismatch for 2-cell to 4-cell lithium-ion (Li+) battery packs. The voltage of each cell in the battery pack is checked and compared to the programmable threshold and to the other cells in the pack. The MAX1666 protects the battery pack in an overcurrent condition by disconnecting the pack from the load at a programmable limit. On-chip power MOSFET drivers control external P-channel MOSFETs to disconnect the cells from external terminals when faults occur. The MAX1666 employs a unique timing scheme that allows three modes of operation for optimal performance and battery power conservation. The MAX1666 can operate in a stand-alone configuration or in conjunction with a microcontroller. It is available in four versions: the S version monitors two Li+ cells, the A and V versions monitor three cells, and the X version monitors four cells. When the charge path is disabled by the charge control pin, the MAX1666A reduces current consumption compared to the MAX1666S/V/X.

Key Features		Applications/Uses
Overvoltage Protection Programmable Limits from +4.0V to +4.4V Accurate to ±0.5% Undervoltage Protection Programmable Limits from +2.0V to +3.0V Accurate to ±2.5% Cell Mismatch Protection Programmable Limits from 0 to 500mV Accurate to ±10% Overcharge Current Protection Overdischarge Current Protection Low 30µA (typ) Operating Supply Current Low 1µA (max) Standby Current +28V (max) Input Voltage Available in Small 16-Pin QSOP (MAX1666S) and 20-Pin QSOP (MAX1666A/V/X) Packages		2/3/4-Cell Lithium-Ion Battery Pack

Diagram

Typical Operating Circuits

Design Guides

Power Management for Battery-Powered Equipment (PDF)

Reliability Reports

Show FIT data for: MAX1666 Request Reliability Report for: MAX1666S MAX1666V MAX1666X MAX1666A MAX1666

Software/Models

MAX1666V Macromodel MAX1666V Orcad Library MAX1666V_ADJ Test Circuit File MAX1666V_OC Test Circuit File MAX1666V_OD Test Circuit File MAX1666V_STARTUP Test Circuit File

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-8 of 8

MAX1666A	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1666AEEP-T		N/A	No Longer Available	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1666AEEP		N/A	No Longer Available	QSOP;20 pin;54 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1666S	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1666SEEE-T		N/A	No Longer Available	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1666SEEE		N/A	No Longer Available	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1666V	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1666VEEP-T		N/A	No Longer Available	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1666VEEP		N/A	No Longer Available	QSOP;20 pin;54 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1666X	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1666XEEP-T		N/A	No Longer Available	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1666XEEP		N/A	No Longer Available	QSOP;20 pin;54 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

Notes and Comments

Programmable overvoltage (4.0V to 4.4V) Undervoltage (2.0V to 3.0V) and Cell Mismatch (0 to 500mV) Protections

More Information

New Product Press Release 1999-06-07

Related Products

MAX1665S, MAX1665V, MAX1665X Lithium-Ion Battery Pack Protector

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