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XT4051 - Standalone Linear Li-Ion Battery Charger

General Description

The XT4051 is a complete constant-current /constant -voltage linear charger for single cell lithium-ion batteries.

Its ThinSOT package and low external component count make the XT4051 ideally suited for portable applications.

Key Features

  • Constant-Current/Constant-Voltage.
  • Charges Single Cell Li-Ion Batteries Directly from USB Port.
  • Charge Current Monitor Output for Gas Gauging.
  • Automatic Recharge.
  • Charge Status Output Pin.
  • 3/10 Charge Termination.
  • 25uA Supply Current in Shutdown.
  • 2.9V Trickle Charge Threshold (XT4051).
  • Soft-Start Limits Inrush Current.
  • Battery reversed protection.
  • 6KV ESD(HBM) capability.

📥 Download Datasheet

Datasheet Details

Part number XT4051
Manufacturer Silinktek
File Size 289.67 KB
Description Standalone Linear Li-Ion Battery Charger
Datasheet download datasheet XT4051 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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XT4051 Standalone Linear Li-Ion Battery Charger with Thermal Regulation ■ General Description The XT4051 is a complete constant-current /constant -voltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make the XT4051 ideally suited for portable applications. Furthermore, the XT4051 is specifically designed to work within USB power specifications. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor.