Power Management PMIC & Multifunction USB Power Manager (PowerPath, Battery Charger)

LTC4098-3.6 - USB Compatible Switching Power Manager/LiFePO4 Charger with Overvoltage Protection

Features

  • 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

Typical Application

LTC4098-3.6 Typical Application
LTC4098-3.6 Typical Application

Description

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.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

QFN-20

LTC4098-3.6 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4098EUDC#PBF QFN 20 E $3.57 $2.50 View
LTC4098EUDC#TRPBF QFN 20 E $2.56 View
LTC4098EUDC-1#PBF QFN 20 E $3.57 $2.50 View
LTC4098EUDC-1#TRPBF QFN 20 E $2.56 View
LTC4098EUDC-3.6#PBF QFN 20 E $3.79 $2.65 View
LTC4098EUDC-3.6#TRPBF QFN 20 E $2.71 View
Buy Now • Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

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

Simulate

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

Technical Support