LTC3559
LTC3559-1

PRODUCTION

LTC3559
LTC3559-1

Linear USB Battery Charger with Dual Buck Regulators

PRODUCTION

USB Charger Plus Dual Buck Regulators slide

Not the part you were looking for?

Go to Product Selection Table

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $2.86

Features

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

Additional Details

The LTC3559/LTC3559-1 are USB battery chargers with dual high efficiency buck regulators. The parts are ideally suited to power single-cell Li-Ion/Polymer based handheld applications needing multiple supply rails.

Battery charge current is programmed via the PROG pin and the HPWR pin, with capability up to 950mA at the BAT pin. The battery charger has an NTC input for temperature qualified charging. The CHRG pin allows battery status to be monitored continuously during the charging process. An internal timer controls charger termination.

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. A MODE pin provides the flexibility to place both buck regulators in a power saving Burst Mode operation or a low noise pulse skip mode.

The LTC3559/LTC3559-1 are offered in a low profile thermally enhanced 16-lead (3mm × 3mm) QFN package.

Applications

SD/Flash-Based MP3 Players
Low Power Handheld Applications

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $2.86

Technical Documents 4

LTC3559: Linear USB Battery Charger with Dual Buck Regulators Data Sheet 05/06/2008

R415 Reliability Data 03/23/2018

DC1085A - Demo Manual 09/24/2009

Reverse Voltage Protection for Battery Chargers 06/01/2020

Design Resources 4

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)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3559EUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3559EUD-1#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3559EUD-1#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3559EUD#PBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3559EUD#TRPBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3559EUD-1#PBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3559EUD-1#TRPBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

Companion Parts 2

Parts	Product Life Cycle	Description
Battery Fuel Gauge and Coulomb Counter1
LTC2942	NOT RECOMMENDED FOR NEW DESIGNS	Battery Gas Gauge with Temperature, Voltage Measurement
Low Voltage Hot Swap Controllers1
LTC4361-1 LTC4361-2		Overvoltage/Overcurrent Protection Controller

Alternative Parts 2

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

DC1085A

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

DC1085A

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

Buy Now View Details

Product Detail

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

ZIP

DC1085A - Design File

731.00K

PDF

DC1085A - Schematic

51.00K

PDF

DC1085A - Demo Manual

1.00M

DC1085A

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

LTspice 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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.