LTC4124

RECOMMENDED FOR NEW DESIGNS

100mA Wireless Li-Ion Charger with Low Battery Disconnect

Analog Devices LTC4124 Product Info

10 February 2026 5

Features

Complete Wireless Power Receiver, Li-Ion Charger and PowerPath^™ Controller
Wireless Input Power Control and Rectification
Wideband Wireless Power Frequency: DC to >10MHz
Pin-Selectable Charge Current: 10mA/25mA/50mA/100mA
Pin-Selectable Charge Voltage: 4.0V/4.1V/4.2V/4.35V
Pin-Selectable Low Battery Disconnect: 2.7V/3.2V

Zero Battery Drain Current in Disconnect/Ship Mode
Pin-Selectable Low Battery Pre-Charge Current Enable
NTC Input for Temperature Qualified Charging
Safety Charge Termination Timer
Tiny Total Solution Size with Few Externals
Small Thermally Enhanced 12-lead 2mm × 2mm LQFN Package

Part details & applications

The LTC4124 is a simple high performance wireless Li-Ion charger with low battery disconnect. The pin-selectable charge current (up to 100mA) and charge voltage ensure versatility while minimizing the number of required external components.

Wireless charging with the LTC4124 allows devices to be charged while sealed within enclosures and eliminates bulky connectors in space-constrained applications. Elimination of exposed conductive connectors also creates more robust devices while ensuring an effortless end-user experience.

The LTC4124 includes an NTC input for safe temperature qualified charging and a battery disconnect feature that prevents damage to a battery due to over-discharging.

The 2mm × 2mm LQFN package and minimal number of external components make the LTC4124 well-suited for low power portable applications where small solution size is mandatory.

Applications

Medical Wireless Sensors
Military Wearables
High End Wireless Headsets
Streaming Headsets with Bluetooth Connectivity
Virtual Reality Headsets
High End Remote Control
IoT Devices

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