製品詳細

Number of series cells 1, 2, 3, 4 Charge current (max) (A) 0.015 Vin (max) (V) 20 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 20 Control topology Linear Control interface Standalone (RC-Settable) Features IC thermal regulation Vin (min) (V) 13 Rating Catalog Operating temperature range (°C) -40 to 125
Number of series cells 1, 2, 3, 4 Charge current (max) (A) 0.015 Vin (max) (V) 20 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 20 Control topology Linear Control interface Standalone (RC-Settable) Features IC thermal regulation Vin (min) (V) 13 Rating Catalog Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Voltage options for charging 1, 2, 3 or 4 cells
  • Tiny SOT23-5 package
  • Precision (0.5%) end-of-charge control
  • Drive capability for external power stage
  • Low quiescent current, 85 µA (typ.)

  • Voltage options for charging 1, 2, 3 or 4 cells
  • Tiny SOT23-5 package
  • Precision (0.5%) end-of-charge control
  • Drive capability for external power stage
  • Low quiescent current, 85 µA (typ.)

The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-of-charge control for Lithium-Ion rechargeable batteries. The LM3420 is available in five fixed voltage versions for one through four cell charger applications (4.2V, 8.2V/8.4V, 12.6V and 16.8V respectively).

Included in a very small package is an (internally compensated) op amp, a bandgap reference, an NPN output transistor, and voltage setting resistors. The amplifier's inverting input is externally accessible for loop frequency compensation. The output is an open-emitter NPN transistor capable of driving up to 15 mA of output current into external circuitry.

A trimmed precision bandgap reference utilizes temperature drift curvature correction for excellent voltage stability over the operating temperature range. Available with an initial tolerance of 0.5% for the A grade version, and 1% for the standard version, the LM3420 allows for precision end-of-charge control for Lithium-Ion rechargeable batteries.

The LM3420 is available in a sub-miniature 5-lead SOT23-5 surface mount package thus allowing very compact designs.


The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-of-charge control for Lithium-Ion rechargeable batteries. The LM3420 is available in five fixed voltage versions for one through four cell charger applications (4.2V, 8.2V/8.4V, 12.6V and 16.8V respectively).

Included in a very small package is an (internally compensated) op amp, a bandgap reference, an NPN output transistor, and voltage setting resistors. The amplifier's inverting input is externally accessible for loop frequency compensation. The output is an open-emitter NPN transistor capable of driving up to 15 mA of output current into external circuitry.

A trimmed precision bandgap reference utilizes temperature drift curvature correction for excellent voltage stability over the operating temperature range. Available with an initial tolerance of 0.5% for the A grade version, and 1% for the standard version, the LM3420 allows for precision end-of-charge control for Lithium-Ion rechargeable batteries.

The LM3420 is available in a sub-miniature 5-lead SOT23-5 surface mount package thus allowing very compact designs.


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種類 タイトル 最新の英語版をダウンロード 日付
* データシート LM3420-4.2, -8.2, -8.4, -12.6, -16.8 Lithium-Ion Battery Charge Controller (jp) データシート (Rev. C 翻訳版) 最新英語版 (Rev.E) PDF | HTML 2004年 10月 4日

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