LTC4054L-4.2 Linear Technology, LTC4054L-4.2 Datasheet
LTC4054L-4.2
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LTC4054L-4.2 Summary of contents
Page 1
... 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 U 3 90mA 5 4.2V COIN CELL Li-Ion 1.69k BATTERY 4054l42 TA01 LTC4054L-4.2 U ® 4054L is a complete, constant-current/constant- Complete Charge Cycle (130mAh Battery) 100 4.4 90 4.3 CONSTANT 80 4.2 CURRENT CONSTANT ...
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... LTC4054L-4 ABSOLUTE AXI U RATI GS (Note 1) Input Supply Voltage (V ) ....................... –0.3V to 10V CC PROG ............................................. – 0. CHRG ........................................................ –0.3V to 10V BAT ............................................................. – 0. BAT Short-Circuit Duration .......................... Continuous BAT Pin Current ................................................. 200mA PROG Pin Current ................................................ 1.5mA Maximum Junction Temperature .......................... 125 C Operating Temperature Range (Note 2) .. – Storage Temperature Range ................. – ...
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... BAT 1.0075 PROG 1.0050 1.0025 1.0000 0.9975 0.9950 0.9925 0.9900 7 –50 – TEMPERATURE ( C) LTC4054L-4.2 MIN TYP MAX 120 1.5 100 0.75 2 4.5 400 1000 2500 1 expressed as a fraction of measured full charge current Charge Current vs PROG Pin Voltage 180 ...
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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 – 100 125 –25 0 TEMPERATURE ( C) 4054L G04 Regulated Output (Float) Voltage vs Charge Current 4. 600 PROG 4. 4.22 4.20 4.18 4.16 4. ...
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... V (V) BAT Recharge Voltage Threshold vs Temperature 4. PROG 4.09 4.07 4.05 4.03 4.01 3.99 –50 – TEMPERATURE ( C) LTC4054L-4.2 Trickle Charge Current vs Supply Voltage PROG 2.5V BAT 15k PROG 0 100 4 5 5.5 4.5 V (V) CC 4054L G14 Charge Current vs Supply Voltage 200 V ...
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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 of approximately connected to the CHRG pin, indicating an “AC present” condition. When the LTC4054L detects an undervoltage lockout condition, CHRG is forced high impedance ...
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... W BLOCK DIAGRA 120 C T DIE SHDN CHRG 1 STANDBY – – – 0. – – 2.9V TO BAT PROG 5 R PROG LTC4054L-4 150 BAT – REF 1.21V GND 2 4054L42 BD 4054l42f 7 ...
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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 an internal P-channel power MOSFET and thermal regulation circuitry. No block- ing diode or external sense resistor is required ...
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... MOSFET, the UVLO circuit keeps the charger in shutdown mode if V falls to within 30mV of the battery voltage. If the UVLO comparator is tripped, the charger will not come out of shutdown mode until V voltage. LTC4054L-4.2 BAT > 2.9V 2.9V < BAT < 4.05V 4054L42 F01 rises 100mV above the battery CC ...
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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 to less than new charge cycle can be initiated by reconnecting the program resistor ...
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... T = 120 C – 120 C – 10k PROG LTC4054L R C PROG FILTER GND 4054L42 F02 LTC4054L-4.2 – • BAT BAT is the power dissipated the input supply CC is the battery voltage and I is the charge BAT BAT D JA – • I • ...
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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 ambient temperature at which the JA LTC4054L will begin to reduce the charge current is approximately 120 C – ...
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... OUT pin should be forced to a high impedance state. The weak current source will pull the IN pin low through the 800k resistor; if CHRG is high impedance, the IN pin to CC will be pulled high, indicating that the part UVLO state 800k LTC4054L PROCESSOR 2k CHRG OUT IN LTC4054L-4.2 4054L42 F03 4054l42f 13 ...
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... USB port when a wall adapter is present and a Schottky diode, D1, is used to prevent USB power loss through the 1k pull-down resistor. 5V WALL ADAPTER 4054L42 F04 USB POWER Figure 5. Combining Wall Adapter and USB Power 100mA 3 SYSTEM BAT LOAD LTC4054L-4 Li-Ion PROG V CC BATTERY MP1 1k 1.5k 4054l42 F05 ...
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... U S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.95 REF 1.22 REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) PIN ONE 0.95 BSC 0.80 – 0.90 1.00 MAX 0.09 – 0.20 (NOTE 3) LTC4054L-4.2 2.90 BSC (NOTE 4) 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S5 TSOT-23 0302 4054l42f 15 ...
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... For Simultaneous Operation of USB Peripheral and Battery Charging from USB 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 ...