LTC4054LES5-4.2 Linear Technology Corporation, LTC4054LES5-4.2 Datasheet
LTC4054LES5-4.2
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LTC4054LES5-4.2 Summary of contents
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... Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. *U.S. Patent No. 6,522,118 Complete Charge Cycle (130mAh Battery) 90mA 4 ...
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... PROG BAT 150mA) (Note 5) PROG BAT R = 1k, Current Mode PROG CHRG I = 5mA CHRG V – V FLOAT RECHRG ORDER PART NUMBER LTC4054LES5-4.2 5 PROG PART MARKING LTAFA MIN TYP MAX UNITS 4.25 6.5 V 1200 2000 A 200 500 4.158 4.2 4.242 V 9 ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER T Junction Temperature in Constant LIM Temperature Mode R Power FET “ON” Resistance ON (Between V and BAT Soft-Start Time SS t Recharge Comparator Filter Time RECHARGE ...
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LTC4054L-4 TYPICAL PERFOR A CE CHARACTERISTICS PROG Pin Pull-Up Current vs Temperature and Supply Voltage 3 4.3V BAT PROG 3.5 3 4.2V CC 2.9 2.7 2.5 ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS CHRG Pin Current vs Temperature (Weak Pull-Down State 4.3V BAT CHRG – 100 ...
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LTC4054L-4 CTIO S CHRG (Pin 1): Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is pulled low by an internal N-channel MOSFET. When the charge cycle is completed, a weak pull-down ...
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W BLOCK DIAGRA 120 C T DIE SHDN CHRG 1 STANDBY – – – 0. – – 2.9V TO ...
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LTC4054L-4.2 U OPERATIO The LTC4054L is a single cell lithium-ion battery charger using a constant-current/constant-voltage algorithm. Its ability to control charge currents as low as 10mA make it well-suited for charging low capacity lithium-ion coin cell batteries. The LTC4054L includes ...
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U OPERATIO POWER ON RECONNECTED UVLO CONDITION Charge Status Indicator (CHRG) The charge status output has three different states: strong pull-down (~10mA), weak pull-down (~20uA), and high impedance. The strong pull-down state indicates that the LTC4054L charge ...
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LTC4054L-4.2 U OPERATIO Manual Shutdown At any point in the charge cycle, the LTC4054L can be put into shutdown mode by removing R PROG pin. This reduces the battery drain current to less than 2 A and the supply current ...
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U U APPLICATIO S I FOR ATIO Stability Considerations The constant-voltage mode feedback loop is stable with- out an output capacitor provided a battery is connected to the charger output. With no battery present, an output capacitor is recommended to ...
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LTC4054L-4 APPLICATIO S I FOR ATIO Example: An LTC4054L operating from a 6V wall adapter is programmed to supply 150mA full-scale current to a discharged Li-Ion battery with a voltage of 3.75V. Assum- ing is 200 C/W, the ...
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U U APPLICATIO S I FOR ATIO V Bypass Capacitor CC Many types of capacitors can be used for input bypassing, however, caution must be exercised when using multi- layer ceramic capacitors. Because of the self resonant and high Q ...
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LTC4054L-4 APPLICATIO S I FOR ATIO Reverse Polarity Input Voltage Protection In some applications, protection from reverse polarity voltage desired. If the supply voltage is high CC enough, a series blocking diode can be used. ...
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... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 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. U ...
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... Port, Keeps Current Drawn from USB Port Constant, Keeps Battery Fresh, Use with the LTC4053, LTC1733, or LTC4054 www.linear.com Basic Li-Ion Battery Charger with Reverse Polarity Input Protection 100mA BAT CC LTC4054L-4 PROG 1 F GND 2 1.5k 4054L42 TA03 100mA + Li-Ion CELL 1.5k LT/TP 1203 1K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2003 4054l42f ...