LTC1559

NOT RECOMMENDED FOR NEW DESIGNS

Backup Battery Controller with Fixed Output

Data Sheet Product Selection Table

Part Models: 12
1ku List Price: Starting From $3.48

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Overview

Not Recommended For New Designs. Contact Analog Devices for Potential Replacement.
Complete Battery Backup System in an SO-8, 16-Pin GN or SO Package
Generates Fixed Backup Voltage (3.07V/4.63V) from a Single 1.2V NiCd Button Cell
Automatic Main Supply to Backup Switching
Minimum 100mW Output Power
Automatic Fast Recharge of NiCd Battery
Programmable NiCd Trickle Charge Current

Smart NiCd Charger Minimizes Recharge Time and Maximizes System Efficiency After Backup
Onboard Power-Up and Push-Button Reset Generator
Performs V_CC Supervisory Functions
Reset Assertion Guaranteed at V_CC = 1V
Short-Circuit Protection
Thermal Limiting

Not Recommended For New Designs. Contact Analog Devices for Potential Replacement.

The LTC1559 is a backup battery controller that provides all the functions necessary to implement a backup 3.3V or 5V power supply using a single NiCd cell. It includes a 1.2V to 3.07V/4.63V boost converter, an intelligent 2-stage battery charger, automatic backup switching and a microprocessor reset generator. The boost converter uses a synchronous switching architecture to achieve a typical efficiency of 70%, ensuring maximum backup lifetime from a small NiCd cell.

The on-chip NiCd charger uses an internal gas gauge to minimize fast recharge time and prevent overcharging of the backup cell, thereby improving system efficiency and extending the life of the backup cell. The LTC1559 also provides a user programmable trickle charge current to compensate for self-discharge losses in the backup cell.

The LTC1559’s automatic backup switching scheme requires minimum intervention from the host system and provides feedback to the host to minimize system loading in the backup state. Its internal V_CC fault detector and reset generator eliminate the need for a separate microprocessor supervisory chip in most applications.

The LTC1559 is available in an SO-8, 16-pin GN or SO package.

Applications

Notebook Computers
Palmtop Computers/PDAs
Portable Instruments
Battery-Powered Systems

Part Models: 12
1ku List Price: Starting From $3.48

Documentation

Data Sheet 1

LTC1559: Backup Battery Controller with Fixed Output Data Sheet 08/22/2007

Reliability Data 1

R370 Reliability Data 03/23/2018

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
LTC1559CGN-3.3#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CGN-3.3#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CGN-5#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CGN-5#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CS-3.3#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CS-3.3#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CS-5#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CS-5#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CS8-3.3#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CS8-3.3#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CS8-5#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1559CS8-5#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC1559CGN-3.3#PBF	PRODUCTION
LTC1559CGN-3.3#TRPBF	PRODUCTION
LTC1559CGN-5#PBF	PRODUCTION
LTC1559CGN-5#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1559CGN-3.3#PBF	PRODUCTION
LTC1559CGN-3.3#TRPBF	PRODUCTION
LTC1559CGN-5#PBF	PRODUCTION
LTC1559CGN-5#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC1559CGN-3.3#PBF	PRODUCTION
LTC1559CGN-3.3#TRPBF	PRODUCTION
LTC1559CGN-5#PBF	PRODUCTION
LTC1559CGN-5#TRPBF	PRODUCTION
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LTC1559CS-3.3#PBF	PRODUCTION
LTC1559CS-3.3#TRPBF	PRODUCTION
LTC1559CS-5#PBF	PRODUCTION
LTC1559CS-5#TRPBF	PRODUCTION
LTC1559CS8-3.3#PBF	PRODUCTION
LTC1559CS8-3.3#TRPBF	PRODUCTION
LTC1559CS8-5#PBF	PRODUCTION
LTC1559CS8-5#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0252 Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package
		PCN22_0252_Form Material_Report Qualification Results Summary
LTC1559CS-3.3#PBF	PRODUCTION
LTC1559CS-3.3#TRPBF	PRODUCTION
LTC1559CS-5#PBF	PRODUCTION
LTC1559CS-5#TRPBF	PRODUCTION
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]
		PCN22_0173_Form Material_Report Delta Qualification Matrix
LTC1559CS-3.3#PBF	PRODUCTION
LTC1559CS-3.3#TRPBF	PRODUCTION
LTC1559CS-5#PBF	PRODUCTION
LTC1559CS-5#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1559CS8-3.3#PBF	PRODUCTION
LTC1559CS8-3.3#TRPBF	PRODUCTION
LTC1559CS8-5#PBF	PRODUCTION
LTC1559CS8-5#TRPBF	PRODUCTION
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0026_Form Material_Report Delta Qualification Matrix
LTC1559CS8-3.3#PBF	PRODUCTION
LTC1559CS8-3.3#TRPBF	PRODUCTION
LTC1559CS8-5#PBF	PRODUCTION
LTC1559CS8-5#TRPBF	PRODUCTION