LTC4098-3.6

RECOMMENDED FOR NEW DESIGNS

USB Compatible Switching Power Manager/LiFePO₄ Charger with Overvoltage Protection

Part Models: 2
1ku List Price: Starting From $3.19

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Part Details

Switching Regulator with Bat-Track^™ Adaptive Output Control Makes Optimal Use of Limited Power Available from USB Port to Charge Battery and Power Application
Charge Control Algorithm Specifically Designed for LiFePO₄ (Lithium Iron Phosphate)
Overvoltage Protection Guards Against Damage
Bat-Track External Step-Down Switching Regulator Control Maximizes Efficiency from Automotive, Firewire and Other High Voltage Input Sources
180mΩ Internal Ideal Diode Plus External Ideal Diode Controller Seamlessly Provide Low Loss PowerPath^™ When Input Power Is Limited or Unavailable
Preset 3.6V Charge Voltage with 0.5% Accuracy
Instant-On Operation with Discharged Battery
700mA Maximum Load Current from USB Port
2A Maximum Input Current from Internal Switching Regulator
1.5A Maximum Charge Current with Thermal Limiting
20-Lead 3mm × 4mm × 0.75mm QFN Package

The LTC4098-3.6 is a high efficiency USB PowerPath controller and full-featured LiFePO₄ battery charger. It seamlessly manages power distribution from multiple sources including USB, wall adapter, automotive, Firewire or other high voltage DC/DC converters, and a LiFePO₄ battery.

The LTC4098-3.6 charge algorithm is optimized for LiFePO₄ by implementing a 1-hour float voltage termination timer and a 0°C to 60°C NTC-based charge qualification range. Furthermore, completely discharged batteries are charged at the full programmed charge current.

The LTC4098-3.6’s switching regulator can automatically limit its input current for USB compatibility. For automotive and other high voltage applications, the LTC4098‑3.6 interfaces with an external switching regulator. Both the USB input and the auxiliary input controller feature Bat-Track optimized charging to provide maximum power to the application and reduced heat in high power density applications with input supplies from 5V to as high as 38V.

An overvoltage protection circuit guards the LTC4098-3.6 from high voltage damage on the VBUS pin with just two external components.

The LTC4098-3.6 is available in a 20-lead 3mm × 4mm × 0.75mm QFN surface mount package.


	Float Voltage
LTC4098	4.2V (1-cell Li-Ion/Li-Polymer)
LTC4098-1	4.1V (1-cell Li-Ion/Li-Polymer)
LTC4098-3.6	3.6V (1-cell LiFePO4)

Applications

High Peak Power Battery-Powered Equipment
Backup Applications
High Reliability Handhelds

Part Models: 2
1ku List Price: Starting From $3.19

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
LTC4098EUDC-3.6#PBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4098EUDC-3.6#TRPBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys