LTC1559CGN-3.3 Linear Technology, LTC1559CGN-3.3 Datasheet
LTC1559CGN-3.3
Specifications of LTC1559CGN-3.3
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LTC1559CGN-3.3 Summary of contents
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... Maximizes System Efficiency After Backup Onboard Power-Up and Push-Button Reset Generator Performs V Supervisory Functions CC Reset Assertion Guaranteed at V Short-Circuit Protection Thermal Limiting U APPLICATIONS Notebook Computers Palmtop Computers/PDAs Portable Instruments Battery-Powered Systems , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATION * **BACKUP + C1 BATTERY 1.2V 68k ...
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... Boost Converter in Low Current Mode (Note 7) Boost Converter in High Current Mode (Note LTC1559-3.3 LTC1559-5 LTC1559-3.3 LTC1559-5 LTC1559-3.3 LTC1559-5 LTC1559-3.3 LTC1559-5 TOP VIEW ORDER PART NUMBER 16 V BAK 15 V BAK LTC1559CGN-3 LTC1559CGN-5 13 BACKUP LTC1559CS-3.3 12 RESET LTC1559CS-5 11 RESET LOBAT S PACKAGE 16-LEAD PLASTIC SO = 110 C/ W (GN 110 C/ W (S) ...
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ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER UVLO Reset Monitor V V UVLO Trip Voltage (Note 5) LOBAT2 BAT Backup Battery Charger I Battery Charge Current During Fast Recharge CHGF I User-Programmable Trickle Charge CHGT Current Range Q Fast Recharge Factor (Note 6) ...
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LTC1559-3.3/LTC1559 TYPICAL PERFORMANCE CHARACTERISTICS Output Power vs Battery Voltage 140 I = 330mA 200 F L 120 100 1.0 1.1 1.2 1.3 1.4 NiCd TERMINAL VOLTAGE (V) 1559 G01 Boost ...
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PIN FUNCTIONS Pin Numbers Are Shown First for the SO-8 Package Then the GN16 and S16 Packages SW (Pins 1/1, 2): Boost Converter Switching Node. Con- nect inductor from SW to the positive terminal ...
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LTC1559-3.3/LTC1559 PIN FUNCTIONS LOBAT (Pin 9): Low Backup Battery Detector Output. This is an open-drain output with an internal weak pull-up asserted if the NiCd cell terminal voltage drops below 1.0V. This pin is pulled ...
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U SWITCHING WAVEFORMS Cold Power Boot-Up Description 1. System regulator starts to ramp up the output (PS) once the V voltage increases beyond the minimum BAT input value starts to increase once PS is high enough to turn ...
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LTC1559-3.3/LTC1559 APPLICATIONS INFORMATION Overview The LTC1559 is a versatile backup battery control system designed to provide all the functions necessary to imple- ment a complete, highly integrated backup system within a single chip. It allows the system ...
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U U APPLICATIONS INFORMATION SYSTEM REGULATOR with an internal trimmed V (1.272V), switching the REF LTC1559 into backup mode if V (LTC1559-3.3) or 7.5% (LTC1559-5) below its rated value. Upon entering backup mode, the BACKUP pin is asserted and the ...
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LTC1559-3.3/LTC1559 APPLICATIONS INFORMATION still less than V (rated value) – 7% (LTC1559 3.3) after the first boost cycle, the LTC1559 immediately reconnects SW to ground, repeating the boost cycle. If after two consecutive ...
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U U APPLICATIONS INFORMATION high when inactive (typically a boost regulator with an output catch diode), the LTC1559 detects the return of the main supply by watching for V CC value) – 5.5% (LTC1559-3.3). The LTC1559 then shuts down its ...
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LTC1559-3.3/LTC1559 APPLICATIONS INFORMATION case, the NiCd cell is assumed to be damaged and the LTC1559’s priority is shutting down the system grace- fully. In this case, the timer will shut off the N-channel switch transistor after a maximum ...
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U U APPLICATIONS INFORMATION example, a small 60mAhr SAFT cell can back up the system for 20 minutes at an output power of 100mW. Note that 3.07V (LTC1559-3.3), the boost converter CC efficiency improves and allows more ...
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LTC1559-3.3/LTC1559 APPLICATIONS INFORMATION (A) 0V CTL t < 20ms CTL RESET 100 s 20ms DEBOUNCE “SOFT” PUSH-BUTTON RESET AT CTL (A) CTL < 0.25V FOR LESS THAN 20ms (B) CTL > 0.25V FOR MORE THAN 20ms 0V CTL ...
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U U APPLICATIONS INFORMATION The LTC1559 works with standard or memory backup specific NiCd cells. Memory backup cells can operate at higher temperatures and have lower self-discharge rates. The LTC1559’s trickle charger is designed to accommo- date both memory backup ...
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LTC1559-3.3/LTC1559-5 U TYPICAL APPLICATION LTC1559-3.3 Backup System with an LTC1435 Main System Regulator (LTC1435 Output Sense at the Drain of Q11) R14 14k RESET PUSH-BUTTON C + MAIN BATTERY 13 16 35V 4.5 TO 28V 2 V ...
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PACKAGE DESCRIPTION 0.010 – 0.020 45 (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.016 – 0.050 0.406 – 1.270 * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES ...
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LTC1559-3.3/LTC1559-5 PACKAGE DESCRIPTION 0.007 – 0.0098 (0.178 – 0.249) 0.016 – 0.050 (0.406 – 1.270) * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH ...
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... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... Step-Down Switching Regulator TM LTC1479 PowerPath Controller for Dual Battery Systems LTC1558 Battery Backup Controller with Programmable Output PowerPath and Burst Mode are trademarks of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com † L11 ...