The LTC4054ES54.2 is a fixed 4.2V LiIon/LiPo battery charger designed for singlecell applications. Packaged in a compact SOT235 (5pin) form factor, this device provides a simple, spaceefficient charging solution for CircuitModules designs. This 20piece lot is suitable for developers and manufacturers looking to integrate reliable charge management into small, lowprofile products. Key benefits Fixed 4.2V charging voltage for precise termination of singlecell LiIon/LiPo batteries. Small SOT235 package enables a compact PCB footprint and helps save board space. Straightforward external component needs support lowcost, streamlined charger implementations. Builtin charging regulation features help promote safe, reliable battery charging in compact devices. Suitable for a broad range of portable and battery powered electronics where space is at a . 20 pieces per provides convenient procurement for development and small production runs. Key attributes Functionality: LiIon/LiPo battery charger with a fixed 4.2V output designed for singlecell applications. Compatibility: Intended for use with singlecell LiIon/LiPo battery systems. Size: SOT235 package with five pins for compact, easytointegrate board design. Material/packaging: Integrated silicon IC in a SOT235 surfacemount package. Performance: Fixed 4.2V charging path in a compact package suitable for spaceconstrained electronics. Brand/model: LTC4054ES54.2, a Linear Technology (now Analog Devices) charge management solution. Quantity: 20 pieces per package, suitable for CircuitModules project needs. Two to three use cases Use case 1: Integrating into a small wearable or sensor node that uses a single LiIon cell, providing a compact onboard charger with a fixed endofcharge voltage to help protect battery life. Use case 2: Prototyping and development boards for portable devices where a minimal, lowfootprint charging solution is required without external power management circuitry. Use case 3: Lightweight handheld instruments or IoT devices that require reliable singlecell charging in a compact 5pin package, enabling easy PCB layout and assembly. This description reflects the product's brand, model, features, and intended application. It provides a clear, professional overview focused on practical benefits, purpose, and typical uses without adding extraneous details.