LTC3559
LTC3559-1

PRODUCTION

Linear USB Battery Charger with Dual Buck Regulators

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $2.86

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Part Details

Battery Charger

Standalone USB Charger
Up to 950mA Charge Current Programmable via Single Resistor
HPWR Input Selects 20% or 100% of Programmed Charge Current
NTC Input for Temperature Qualified Charging
Internal Timer Termination
Bad Battery Detection
CHRG indicates C/10 or Timeout

Buck Regulators

400mA Output Current
2.25MHz Constant Frequency Operation
Zero Current in Shutdown
Low Noise Pulse Skip Operation or Power Saving Burst Mode Operation
Low No Load Quiescent Current: 35μA
Available in a Low Profile Thermally Enhanced 16-Lead 3mm × 3mm QFN Package

Part Models: 4
1ku List Price: Starting From $2.86

Documentation

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3559EUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3559EUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3559EUD-1#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3559EUD-1#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Fuel Gauge and Coulomb Counter 1
LTC2942	NOT RECOMMENDED FOR NEW DESIGNS	Battery Gas Gauge with Temperature, Voltage Measurement
Low Voltage Hot Swap Controllers 1
LTC4361-1 LTC4361-2		Overvoltage/Overcurrent Protection Controller

Parts	Product Life Cycle	Description
LTC4361-1 LTC4361-2		Overvoltage/Overcurrent Protection Controller
LTC2942	NOT RECOMMENDED FOR NEW DESIGNS	Battery Gas Gauge with Temperature, Voltage Measurement

Tools & Simulations

LTspice 1

LTC3559 - Battery Management

Models for the following parts are available in LTspice:

LTC3559
LTC3559-1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LTC3559EUD Demo Board | USB Li-Ion Linear Charger w/ Dual 400mA Buck Regulators

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Product Details

Demonstration circuit 1085 is a Linear USB Battery Charger with Dual Buck Regulators featuring the LTC3559. The LTC3559 is a CC/CV 5V/USB linear battery charger with dual high efficiency buck regulators. The part is ideally suited to power single cell 4.2V Li-Ion/Polymer-based handheld applications needing multiple supply rails. The DC1085 has a 4.35V to 5.5V input voltage range and is configured to provide up to 500mA of charge current, though the part is capable of providing up to 950mA. The battery charger has an NTC input for temperature qualified charging. Each monolithic synchronous buck regulator provides up to 400mA of output current while operating at efficiencies greater than 90% over the entire Li-Ion/Polymer range. The buck output voltages are set at 2.5V and 1.2V.

Resources

DC1085A - Design File
731.00K

DC1085A - Schematic
51.00K

DC1085A - Demo Manual
1.00M

Latest Discussions

3 Years Ago

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Technical Articles 2