Key facts
- Brand
- Linear Technology
- Model
- LTC4054-4.2/LTC4054X-4.2
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2026-10-13
Start here
Linear Technology LTC4054-4.2/LTC4054X-4.2 Datasheet
The LTC4054-4.2/LTC4054X-4.2 is a complete constant-current/constant-voltage linear charger designed for single cell lithium-ion batteries. It features thermal regulation, programmable charge current up to 800mA, and requires no external MOSFET, sense resistor, or blocking diode. The device is ideally suited for portable applications such as cellular telephones, PDAs, and MP3 players, and is specifically designed to work within USB power specifications.
Read onlineLinear Technology LTC4054-4.2/LTC4054X-4.2 specifications
| Programmable Charge Current | Up to 800mA |
|---|---|
| Regulated Output Voltage | 4.2V |
| Supply Current (Shutdown Mode) | 25µA |
| Operating Ambient Temperature Range | -40 °C to 85°C |
| Maximum Junction Temperature | 125 °C |
| Package Type | 5-Lead SOT-23 |
Source: Linear Technology LTC4054-4.2/LTC4054X-4.2 Datasheet
All Linear Technology LTC4054-4.2/LTC4054X-4.2 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
Does the LTC4054 require external MOSFETs or sense resistors?
No, the LTC4054 requires no MOSFET, sense resistor, or blocking diode.
What is the charge termination condition?
The LTC4054 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.
What is the maximum charge current the LTC4054 can provide?
The LTC4054 can deliver up to 800 mA of charge current.
What is the shutdown supply current of the LTC4054?
In shutdown mode the device draws only about 25 µA.