LTC4054 – LTH7 STANDALONE LINEAR LI-ION BATTERY CHARGER SOT23-5

The LTC 4054 is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. 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.

When the input supply (wall adapter or USB supply) is removed, the LTC4054 automatically enters a low current state, dropping the battery drain current to less than 2µA.

Key Features of LTC4054 LTH7 Linear Single Cell Li-ion Charger IC:

• • Low Input Voltage Operation: Operates from a 4.25V to 6.5V input range, perfect for USB-powered applications.
  • Programmable Charge Current: Charge current is programmable via a resistor, allowing up to 800mA charge rates.
  • Automatic Charge Termination: Automatically terminates charging when the battery reaches 4.2V, ensuring safe charging.
  • Thermal Regulation: Reduces charge current during high temperatures to prevent overheating.
  • Small Package: Available in a compact SOT23-5 package, suitable for space-constrained applications.
  • 2.9V Trickle Charge Threshold (LTC4054)
  • Available Without Trickle Charge (LTC4054X)
  • Preset 4.2V Charge Voltage with ±1% Accuracy

Technical Specifications of LTC4054 LTH7 Linear Single Cell Li-ion Charger IC:

• • Input Voltage: 4.25V to 6.5V
  • Battery Float Voltage: 4.2V ± 1%
  • Maximum Charge Current: 800mA
  • Package: SOT23-5
  • Charge Termination: Automatic, when battery reaches full charge
  • Protection Features: Thermal regulation, over-voltage protection

Schematic Diagram, Connection, Wiring, and Pinout of LTC4054 LTH7:

• • Pin 1 (BAT): Battery connection pin
  • Pin 2 (GND): Ground
  • Pin 3 (PROG): Charge current programming via external resistor
  • Pin 4 (VCC): Input power (4.25V-6.5V)
  • Pin 5 (CHRG): Charge status indication output

Applications of LTC4054 LTH7 Linear Single Cell Li-ion Charger IC:

• • Portable Electronics: Ideal for mobile phones, tablets, and MP3 players.
  • Battery-Powered Devices: Suitable for applications requiring single-cell lithium-ion battery charging.
  • USB-Powered Devices: Can be used in devices charged via USB ports.
  • Wearables: Perfect for small, low-power, battery-operated devices.

Equivalent of LTC4054 LTH7 Linear Single Cell Li-ion Charger IC:

• • TP4056: Popular equivalent for lithium-ion battery charging circuits.
  • MAX1555: Another alternative with similar features..

DataSheet:

• • Download Datasheet

Keywords for LTC4054 LTH7 Linear Single Cell Li-ion Charger IC:

• • LTC4054
  • LTH7
  • Li-ion Charger
  • SOT23-5 Charger IC
  • Single Cell Li-ion Charging

Package Includes:

• • 1 x LTC4054-4.2/LTC4054X-4.2 Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT