LTH7R LTC4054 – 800mA Linear Li-Ion Battery Charger IC
🔍 Product Overview
The LTH7R LTC4054 is a compact, high-efficiency single-cell Li-Ion battery charger IC
designed for USB and adapter-powered applications. With a programmable charge current of up to
800mA, this IC delivers fast, safe, and reliable charging while requiring only a minimal
number of external components.
Built with thermal regulation and automatic charge termination, the LTC4054
ensures optimal battery health, making it ideal for portable, embedded, and consumer electronics designs.
⚡ Quick Specifications
- 🔋 Single-cell Li-Ion / Li-Polymer battery charger
- ⚡ Programmable charging current up to 800mA
- 🔌 Operates from USB or 5V adapter supply
- 📦 Small footprint SOT-23 package
- 🛡 Integrated thermal and over-voltage protection
⭐ Key Advantages
✔ Fast and efficient charging solution
✔ Minimal external components required
✔ Automatic charge termination and recharge
✔ Compact size for space-saving designs
✔ Reliable performance for portable devices
📊 Technical Specifications
| Battery Type | Single-cell Li-Ion / Li-Polymer |
| Maximum Charge Current | 800mA (programmable) |
| Input Voltage | 4.25V – 6.5V |
| Charge Termination | Automatic |
| Protection Features | Thermal regulation, over-voltage |
| Package | SOT-23 |
🧩 Typical Applications
📱 Portable consumer electronics
🔌 USB-powered devices
📟 Embedded and IoT systems
🔋 Battery-powered instruments
💡 Design Tips
- Select the programming resistor carefully to set the desired charge current.
- Ensure adequate copper area for thermal dissipation during high-current charging.
- Follow recommended layout guidelines for stable and noise-free operation.
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