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Li-Ion Linear Battery Charger with LDO
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The STNS01 is a linear charger for single-cell Li-Ion batteries integrating an LDO regulator and several battery protection functions.

The device uses a CC/CV algorithm to charge the battery. The fast-charge current can be programmed using an external resistor. Pre-charge current and termination current are scaled accordingly. The floating voltage value is 4.2 V.

The input supply voltage is normally used to charge the battery and provide power to the LDO regulator. When a valid input voltage is not present and the battery is not empty, the device automatically switches to battery power.

The STNS01 integrates overcharge, overdischarge and overcurrent protection circuitry to prevent the battery from being damaged under fault conditions. It also features a charger enable input to stop the charging process when battery overtemperature is detected by external circuitry.

When the shutdown mode is activated, the battery power consumption is reduced to less than 500 nA to maximize battery life during shelf time or shipping.The device is available in a 3 × 3 mm² 12-lead DFN package.

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Errata Sheet
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Key Features

  • Charges single-cell Li-Ion batteries with CC-CV algorithm and charge termination
  • Charge current programmable up to 200 mA
  • 1% accuracy on floating voltage (4.2 V)
  • Integrated 3.1 V LDO regulator
  • Automatic power path management
  • Battery overcharge protection
  • Battery overdischarge protection
  • Battery overcurrent protection
  • Charging timeout
  • Very low battery leakage in overdischarge/shutdown mode
  • Low quiescent current
  • Charge/Fault status output
  • Charger enable input
  • Available in a 12-lead (3 x 3 mm²) DFN package

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS9672: Li-Ion linear battery charger with LDO
2.0 2,276 KB

Presentations & Training Material


Description Version Size
Power management for handheld and portable applications
734 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STEVAL-ISB032V1 Li-Ion linear battery charger with LDO

Publications and Collaterals

Selection Guides

Description Version Size
Linear and Switching Voltage Regulators Selection Guide
384 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STNS01PURActiveVFDFPN 12 3x3x0.75Tape And Reel_Free Samples.59Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA58593000
ARROWOrder NowEUROPE840000
Farnell Element14Order NowEUROPE49771

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on 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.