LTC1559
NOT RECOMMENDED FOR NEW DESIGNSBackup Battery Controller with Fixed Output
- Part Models
- 12
- 1ku List Price
- Starting From $4.40
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 VCC Supervisory Functions
- Reset Assertion Guaranteed at VCC = 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 VCC 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
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 |
|---|---|---|---|
| LTC1559CGN-3.3#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC1559CGN-3.3#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC1559CGN-5#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC1559CGN-5#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC1559CS-3.3#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1559CS-3.3#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1559CS-5#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1559CS-5#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1559CS8-3.3#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1559CS8-3.3#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1559CS8-5#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1559CS8-5#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| 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 |
||
| 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] |
||
| 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 |
||
| 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 |
||
| 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] |
||
| 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) |
||
| 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 |
||
| LTC1559CS8-3.3#PBF | PRODUCTION | |
| LTC1559CS8-3.3#TRPBF | PRODUCTION | |
| LTC1559CS8-5#PBF | PRODUCTION | |
| LTC1559CS8-5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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