STC4054

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800mA Standalone linear Li-Ion battery charger with thermal regulation

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Product overview

Description

The STC4054 is a constant current/constant voltage charger for single cell Li-Ion batteries. No external sense resistor or blocking diode is required and its ThinSOT package make it ideally suited for portable applications. The STC4054 is designed to work within USB power specifications. An internal block regulates the current when the junction temperature increases, in order to protect the device when it operates in high power or high ambient temperature.
The charge voltage is fixed at 4.2V, and the charge current limitation can be programmed using a single resistor connectd between PROG pin and GND. The charge cycle is automatically terminated when the current flowing to the battery is 1/10 of the programmed value. If the external adaptor is removed, the STC4054 turns off and a 2µA current can flow from the battery to the device. The device can be put into Shutdown Mode, reducing the supply current to 25µA. The device also has a charge current monitor, under voltage lockout, automatic recharge. The device is packaged in TSOT23-5L.
  • All features

    • 25µA supply current in shutdown mode
    • C/10 charge termination
    • Soft-start limits inrush current
    • Low battery voltage detect for precharge setting
    • TSOT23-5L package
    • Single charge status output pin
    • Automatic recharge
    • Programmable charge current up to 800mA
    • Constant current / constant voltage operation with thermal regulation to maximize charge rate without risk of overheating
    • No external MOSFET, sense resistors or blocking diode required
    • Preset 4.2V charge voltage with 1% accuracy
    • Charge current monitor output for gas gauging
    • Charges single cell li-ion batteries directly from USB port

Circuit Diagram

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STC4054GR
Active
TSOT23-5L Industrial Ecopack2

STC4054GR

Package:

TSOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TSOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
STC4054GR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel TSOT23-5L -40 85 MALAYSIA 0.6875 / 1k

STC4054GR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6875 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

TSOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.6875 / 1k

Country of Origin

MALAYSIA

(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors