💡 Smart Charging in a Tiny Package - Meet SL4054: The Sleek Solution for Li-Ion Battery Safety & Efficiency

 Key Specs at a Glance:

 • Input Voltage (VDD): Up to 7V
 • Charge Cut-Off Voltage (VOC): 4.2V for safe, full charging
 • Discharge Protection Voltage (VOD): 3.0V to prevent deep discharge damage
 • Ultra-Low Quiescent Current (IDD): Just 170μA for energy-efficient standby
 • Compact SOT-23–5 Package: Ideal for space-constrained designs

Perfect for compact, battery-powered devices demanding reliable Li-Ion charging with built-in safety and minimal power drain.

Overview:
 The Slkor® SL4054 is a compact, high-performance linear charger IC tailored for single-cell Li-Ion battery applications. Housed in a space-saving SOT-23–5 package, it’s perfect for modern portable electronics where board space and efficiency are at a premium. The SL4054 requires minimal external components and supports both USB and wall adapter power inputs, offering design flexibility for consumer devices.

Built with an internal PMOSFET and reverse current protection, the SL4054 eliminates the need for external blocking diodes — simplifying your BOM and saving board space. Intelligent thermal regulation adjusts the charging current during high-power or high-temperature conditions, ensuring safe and reliable operation.

With a fixed 4.2V output and programmable charging current up to 500mA, the SL4054 ensures efficient battery management. Automatic charge termination, ultra-low standby current (<2μA), and a power-down mode (45μA) extend battery life in standby scenarios.

Advanced features like undervoltage lockout, automatic recharge, current monitoring, and dual status LEDs make this charger ideal for today’s fast-paced consumer electronics.

Key Features:

  • Programmable charging current up to 500mA with a single resistor
  • Integrated PMOSFET — no external diode, MOSFET, or sense resistor needed
  • CC/CV charging algorithm with built-in thermal protection
  • USB power input compatible
  • Precise 4.2V charge voltage with ±1% accuracy
  • Trickle charge kicks in below 2.9V
  • Soft-start limits inrush current
  • Extremely low standby current: <20μA
  • Compact and efficient SOT-23–5 package

Target Applications:

  • USB-powered Li-Ion battery chargers
  • Bluetooth headsets and wireless audio gear
  • MP3 players, digital cameras, and smartphones
  • Handheld devices, PDAs, and portable medical equipment
  • Any space-constrained portable electronics

For more information please reach out : sales03@slkormicro.com

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