LTC4054ES5-4.2#TRM Linear Technology, LTC4054ES5-4.2#TRM Datasheet
![IC CHARGR BATTERY L-ION TSOT23-5](/photos/6/57/65785/tsot-23-5_05-08-1635_sml.jpg)
LTC4054ES5-4.2#TRM
Specifications of LTC4054ES5-4.2#TRM
LTC4054ES5-4.2
Available stocks
Related parts for LTC4054ES5-4.2#TRM
LTC4054ES5-4.2#TRM Summary of contents
Page 1
... 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 (750mAh Battery) ...
Page 2
... High to Low 10k (Note 6) PROG PROG R = 10k, Current Mode PROG CHRG I = 5mA CHRG FLOAT RECHRG ORDER PART NUMBER 5 PROG LTC4054ES5-4.2 LTC4054XES5-4 PART MARKING = LTH7 LTADY MIN TYP MAX UNITS 4.25 6.5 300 2000 200 500 25 50 4.158 4.2 4.242 93 100 107 465 ...
Page 3
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 ...
Page 4
LTC4054-4.2/LTC4054X-4 TYPICAL PERFOR A CE CHARACTERISTICS PROG Pin Pull-Up Current vs Temperature and Supply Voltage 3 4.3V BAT PROG 3 4.2V CC 3.3 3 6.5V CC 2.9 2.7 2.5 ...
Page 5
W U TYPICAL PERFOR A CE CHARACTERISTICS CHRG Pin Current vs Temperature (Weak Pull-Down State 4.3V BAT CHRG – 100 ...
Page 6
LTC4054-4.2/LTC4054X-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 ...
Page 7
W BLOCK DIAGRA 120 DIE SHDN CHRG 1 STANDBY TRICKLE CHARGE DISABLED ON LTC4054X LTC4054-4.2/LTC4054X-4.2 1 – – – 0. – ...
Page 8
LTC4054-4.2/LTC4054X-4.2 U OPERATIO The LTC4054 is a single cell lithium-ion battery charger using a constant-current/constant-voltage algorithm. It can deliver up to 800mA of charge current (using a good thermal PCB layout) with a final float voltage accuracy of 1%. The ...
Page 9
U OPERATIO lockout conditions. A weak pull-down indicates that V meets the UVLO conditions and the LTC4054 is ready to charge. High impedance indicates that the LTC4054 is in undervoltage lockout mode: either V above the BAT pin voltage or ...
Page 10
LTC4054-4.2/LTC4054X-4 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 ...
Page 11
U U APPLICATIO S I FOR ATIO The LTC4054 can be used above 45 C ambient, but the charge current will be reduced from 400mA. The approxi- mate current at a given ambient temperature can be approximated by: 120 C ...
Page 12
LTC4054-4.2/LTC4054X-4 APPLICATIO S I FOR ATIO BAT LTC4054-4 PROG GND Figure 3. A Circuit to Maximize Thermal Mode Charge Current Solving for I using the quadratic formula BAT I BAT ...
Page 13
... Figure 5. Using a Microprocessor to Determine CHRG State 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. ...
Page 14
LTC4054-4.2/LTC4054X-4 APPLICATIO S I FOR ATIO USB and Wall Adapter Power The LTC4054 allows charging from both a wall adapter and a USB port. Figure 7 shows an example of how to combine wall adapter and USB power ...
Page 15
PACKAGE DESCRIPTIO 0.62 MAX 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING ...
Page 16
... Port, Keeps Current Drawn from USB Port Constant, Keeps Battery Fresh, Use with the LTC4053, LTC1733, or LTC4054 www.linear.com 500mA BAT 330 LTC4054-4 CHRG PROG GND 2k 2 SHDN 405442 TA02 500mA BAT CC LTC4054-4 PROG 1 F GND 2 2k 405442 TA04 LT/TP 0903 1K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2003 405442xf ...