Electronic Components Datasheet Search |
|
LTC1559-5 Datasheet(PDF) 1 Page - Linear Technology |
|
LTC1559-5 Datasheet(HTML) 1 Page - Linear Technology |
1 / 20 page 1 LTC1559-3.3/LTC1559-5 Backup Battery Controller with Fixed Output s Complete Battery Backup System in an SO-8, 16-Pin GN or SO Package s Generates Fixed Backup Voltage (3.07V/4.63V) from a Single 1.2V NiCd Button Cell s Automatic Main Supply to Backup Switching s Minimum 100mW Output Power s Automatic Fast Recharge of NiCd Battery s Programmable NiCd Trickle Charge Current s Smart NiCd Charger Minimizes Recharge Time and Maximizes System Efficiency After Backup s Onboard Power-Up and Push-Button Reset Generator s Performs VCC Supervisory Functions s Reset Assertion Guaranteed at VCC = 1V s Short-Circuit Protection s Thermal Limiting FEATURES DESCRIPTION The LTC ®1559 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 micro- processor 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 microproces- sor supervisory chip in most applications. The LTC1559 is available in an SO-8, 16-pin GN or SO package. APPLICATIONS s Notebook Computers s Palmtop Computers/PDAs s Portable Instruments s Battery-Powered Systems , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION CTL C1 1 µF **BACKUP BATTERY 1.2V NiCd MAIN BATTERY 4.5V TO 28V R1 68k SW LTC1559-3.3 *L1 22 µH GND PS 7 1 8 5 6 3 S1 RESET 1559 TA01 2 4 VBAK VCC RESET BACKUP + C3 100 µF 10V VOUT 3.3V AT NORMAL MODE 3A VBAK 33mA (3.07V) AT BACKUP MODE >33mA (3.3V) AT NORMAL MODE C2 1 µF SYSTEM µP R2 100k Q1 P-MOSFET Si9424DY * SUMIDA CD54-22 µH ** PANASONIC P-11AAH † CONSULT LTC1435 DATA SHEET FOR APPLICATION CIRCUIT INFORMATION †LTC1435 SYNCHRONOUS BUCK REGULATOR + + Backup Time vs VBAK Output Load Current VBAK LOAD CURRENT (mA) 0 800 700 600 500 400 300 200 100 0 15 25 1559 TA02 510 20 30 35 VBAK = 3.07V NiCd CELL = P-11AAH (110mA Hrs) |
Similar Part No. - LTC1559-5_15 |
|
Similar Description - LTC1559-5_15 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |