LTC1558CGN-3.3 Linear Technology, LTC1558CGN-3.3 Datasheet
LTC1558CGN-3.3
Specifications of LTC1558CGN-3.3
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LTC1558CGN-3.3 Summary of contents
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... Its internal V generator eliminate the need for a separate microproces- sor supervisory chip in most applications. The LTC1558 is available in an SO-8, 16-lead package. , LTC and LT are registered trademarks of Linear Technology Corporation 0.1 F ...
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... Relative REF Voltage at V Relative REF Voltage at V Relative REF Voltage at V Relative REF TOP VIEW ORDER PART NUMBER 16 V BAK 15 V BAK LTC1558CGN-3 LTC1558CGN-5 13 BACKUP LTC1558CS-3.3 12 RESET LTC1558CS-5 11 RESET LOBAT S PACKAGE 16-LEAD PLASTIC SO = 110 C/ W (GN 110 C/ W (S) JA MIN TYP MAX 2 ...
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ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER V V UVLO Trip Voltage (Note 4) UVLO(ON UVLO Recovery Trip Voltage (Note 4) UVLO(OFF UVLO Trip Voltage (Note 5) LOBAT BAT Backup Battery Charger I Battery Charge Current CHGF ...
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LTC1558-3.3/LTC1558 TYPICAL PERFORMANCE CHARACTERISTICS Output Power vs Battery Voltage 150 (LTC1558- BAK 125 100 1.0 1.1 1.2 1.3 1.4 NiCd TERMINAL VOLTAGE (V) 1558 G01 Boost Converter ...
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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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LTC1558-3.3/LTC1558 PIN FUNCTIONS LOBAT (Pin 9): Low-Battery Detector Output. This is an open-drain output that pulls low when the backup cell drops below 1V. It gives early warning to the system controller that the backup cell is ...
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U SWITCHING WAVEFORMS Cold Power Boot-Up Description 1. The V voltage increases and turns on the Q BAT diode. V follows V by one body diode drop. BAK BAT 2. V increases above the system regulator’s minimum BAK input voltage. ...
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LTC1558-3.3/LTC1558 APPLICATIONS INFORMATION Overview The LTC1558 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 Once V rises above (V – 7.5%), the LTC1558’s boost FB REF converter deactivates and the freshly charged input capacitor supplies power to the system regulator. The cycle repeats again when the input capacitor’s charge is ...
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LTC1558-3.3/LTC1558 APPLICATIONS INFORMATION proportional to the difference between V and the battery cell voltage, V (1.2V). BAT Assuming ESR = 0 330mA, V IND(PEAK )(R RIPPLE(P-P) IND(PEAK) ESR(CAP) = (330mA)(0 ...
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U U APPLICATIONS INFORMATION internal logic to ensure that the low cell voltage reset is triggered only if the CTL pin is between 0.9V and 0.25V. This will prevent a pushbutton reset (which pulls CTL below 250mV) from being mistaken ...
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LTC1558-3.3/LTC1558 APPLICATIONS INFORMATION In these cases, the LTC1558 assumes that the backup cell is exhausted and presets the gas gauge counter to a default capacity of 128mAhr. It then initiates a recharge cycle. Setting the gas gauge to ...
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U U APPLICATIONS INFORMATION terminate backup operation and remain off until the main power supply returns. It then runs a fast recharge cycle to recharge the backup cell. An onboard low-battery com- parator in the 16-pin package ...
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LTC1558-3.3/LTC1558 APPLICATIONS INFORMATION Table 2. Recommended Inductors PART TYP INDUCTOR MANUFACTURER NUMBER VALUE Sumida CD54-220 22 H 20% Sumida CDRH73/ 20% Capacitor Selection The LTC1558 requires a minimum V to ensure that the boost converter can ...
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U TYPICAL APPLICATIONS LTC1558-3.3 Low Main Battery Voltage (4.5V to 10V) Application RESET PUSHBUTTON MAIN BATTERY 4.5V TO 10V + EXTV 4 SFB 330pF RUN/ 0.1 ...
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LTC1558-3.3/LTC1558-5 U TYPICAL APPLICATIONS LTC1558-5 Medium Main Battery Voltage (7V to 18V) Application RESET PUSHBUTTON MAIN BATTERY 7V TO 18V + EXTV 4 SFB 6 V OSENSE 330pF RUN/SS C ...
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U TYPICAL APPLICATIONS LTC1558-5 High Main Battery Voltage (48V) Application R15 100k Q12 2N3906 Z11 12V R16 100k R11 Q11 D1 422k P-CHANNEL 1N4148 1% MTD2955E MAIN R12 BATTERY 100k 48V 1% C1 0.047 3 ...
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LTC1558-3.3/LTC1558-5 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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... TM LTC1479 PowerPath Controller for Dual Battery Systems LT1521 Micropower Low Dropout Regulator Burst Mode and PowerPath are trademarks of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com COMMENTS Microprocessor Power Supply Monitor and Backup with ...