LTC4098
LTC4098-1

RECOMMENDED FOR NEW DESIGNS

USB Compatible Switching Power Managers/Li-Ion Chargers with Overvoltage Protection

Part Models: 4
1ku List Price: Starting From $3.02

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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
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 4.2V Charge Voltage with 0.5% Accuracy (4.1V for LTC4098-1)
4.1V Float Voltage (LTC4098-1) Improves Battery Life and High Temperature Safety Margin
Instant-On Operation with Discharged Battery
700mA Maximum Load Current from USB Port
1.5A Maximum Charge Current with Thermal Limiting
20-Lead 3mm × 4mm × 0.75mm QFN Package

The LTC4098/LTC4098-1 are high efficiency USB Power-Path controllers and full-featured Li-Ion/Polymer battery chargers. They seamlessly manage power distribution from multiple sources including USB, wall adapter, automotive, Firewire or other high voltage DC/DC converters, and a Li-Ion/Polymer battery.

The LTC4098/LTC4098-1’s internal switching regulator automatically limits its input current for USB compatibility. For automotive and other high voltage applications, the LTC4098/LTC4098-1 interface with an external switching regulator to provide a high efficiency high voltage power path. Both the USB and the optional high voltage inputs feature Bat-Track optimized charging to provide maximum power to the application and ease thermal issues in high power density applications with input supplies from 5V to as high as 38V.

An overvoltage circuit protects the LTC4098/LTC4098-1 from high voltage damage on the USB/wall adaptor inputs with an N-channel FET and a resistor.

The LTC4098/LTC4098-1 are 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

Media Players
GPS
PDAs
Smart Phones

Part Models: 4
1ku List Price: Starting From $3.02

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#PBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4098EUDC#TRPBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4098EUDC-1#PBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4098EUDC-1#TRPBF	20-Lead QFN (3mm x 4mm 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 Chargers 2
LTC4099	PRODUCTION	I²C Controlled USB Power Manager/ Charger with Overvoltage Protection
LTC4155	RECOMMENDED FOR NEW DESIGNS	Dual Input Power Manager/ 3.5A Li-Ion Battery Charger with I²C Control and USB OTG
Battery Monitors & Fuel Gauges 1
LTC2942	NOT RECOMMENDED FOR NEW DESIGNS	Battery Gas Gauge with Temperature, Voltage Measurement
Interface Transceivers & Isolators 1
LTM2884	PRODUCTION	Isolated USB Transceiver with Isolated Power

Protection Switches & Controllers 1
LTC4361-1 LTC4361-2		Overvoltage/Overcurrent Protection Controller

Evaluation Kits

OBSOLETE: LTC4098 with LT3480 Buck Regulator

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Product Details

This evaluation board is obsolete and no longer recommended.

DC1284A: Demo Board for LTC4098/LTC4098-1 - USB Compatible Switching Power Managers/Li-Ion Chargers with Overvoltage Protection

Resources

DC1284A - Demo Manual
9/24/2009

DC1284A - Schematic
9/24/2009

DC1284A - Design File
9/24/2009

LT3505 HV Buck Regulator Board with Plug-in Interface

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Product Details

DC1395A: Demo Board for LT3505 1.2A, Step-Down Switching Regulator in 3mm × 3mm DFN

Resources

DC1395A - Demo Manual
9/24/2009

DC1395A - Schematic
9/24/2009

DC1395A - Design File
9/24/2009

LTC4098 with HV Buck Regulator Plug in Interface

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Product Details

DC1303A: Demo Board for LTC4098/LTC4098-1 - USB Compatible Switching Power Managers/Li-Ion Chargers with Overvoltage Protection

Resources

DC1303A - Design File
9/24/2009

DC1303A - Schematic
9/24/2009

DC1303A - Demo Manual
9/24/2009

LT3480 HV Buck Regulator Board with Plug in Interface

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Product Details

Demonstration Circuit 1394A shows how the LT3480 high voltage step-down regulator can be used with the LTC4098 USB-compatible Li-Ion battery charger to design a 2 input source battery charger circuit that also provides power to the load from the LT3480, a 5V wall adapter or the batteries based on available power. The LTC4098 interfaces with a number of ADI switching regulators to provide a high efficiency, high voltage power path. The LT3480 operates from 8V to 38V (60V transients) and provides 2A with a voltage range that is mode and load dependent.

Resources

DC1394A - Demo Manual
9/24/2009

DC1394A - Design File
9/24/2009

DC1394A - Schematic
9/24/2009

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LTC4098
LTC4098-1

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 4

Design Note 2

Technical Articles 2

Solutions Bulletin & Brochure 1

Product Selector Card 1

Hardware Ecosystem

Evaluation Kits

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