Features and Benefits
- Very Low Power Dissipation: 350mW at 1A
- Complete Standalone Pulse Charger for 1-Cell Lithium-Ion Batteries
- Requires No Microcontroller, MOSFET or Blocking Diode
- Sense Resistor Limits Maximum Current for Safety
- Programmable Charge Termination Timer for
Maximum Capacity Charging
- ±1% Float Voltage Accuracy
- Near End-of-Charge (C/10) Detection Output
- AC Wall Adapter Present Output
- Low Battery Drain when Input Supply Is Removed
- Automatic Trickle Charge for Low Battery
- Automatic Battery Refresh
- Thermal Shutdown Protection
- Tiny Thermally Enhanced MSOP Package
The LTC4052 is a complete standalone pulse charger with integrated MOSFET for 1-cell lithium-ion batteries.
An external sense resistor provides overcurrent limiting as a safety precaution against a user connecting a wall adapter with the incorrect or no current limit. The internal MOSFET prevents reverse battery current from flowing if the input voltage is shorted to ground, eliminating the need for a blocking diode.
As the battery accepts charge and approaches the programmed float voltage, the internal MOSFET begins switching off and on with the duty cycle gradually decreasing as the battery approaches a fully charged condition. A programmable timer terminates the charge cycle. The near end-of-charge C/10 condition is indicated at the CHRG pin when the average charge current falls to one tenth of the wall adapter current. Removing the input voltage puts the LTC4052 into a sleep mode, dropping the battery current drain to less than 1µA.
The LTC4052 is available in a tiny 8-pin thermally enhanced MSOP package.
- Handheld Computers
- Cellular Telephones
- Cradle Chargers
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
R449 Reliability Data3/26/2018
DC531A - Demo Manual9/24/2009
Micropower SOT-23 Buck Regulator Accepts Inputs to 34V3/1/2003 LT Journal
LTC4052-4.2 Companion Parts
Recommended Related Parts
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC4052EMS8E-4.2#PBF||Material Declaration||Reliability Data||8-Lead MSOP w/ EP|
|LTC4052EMS8E-4.2#TRPBF||Material Declaration||Reliability Data||8-Lead MSOP w/ EP|
|Wafer Fabrication Data||R449 Reliability Data|
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.