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LM3420 - Lithium-Ion Battery Charge Controller

Download the LM3420 datasheet PDF. This datasheet also covers the LM3-420 variant, as both devices belong to the same lithium-ion battery charge controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-of-charge control for Lithium-Ion rechargeable batteries.

Key Features

  • n n n n n 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. ).

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM3-420-1.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM3420 8.4-V Li-Ion Battery Charge Controller Texas Instruments
LM3421 N-Channel Controllers Texas Instruments
LM3421-Q1 N-Channel Controllers Texas Instruments
LM3423 N-Channel Controllers Texas Instruments
LM3423-Q1 N-Channel Controllers Texas Instruments

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM3420-12.6 Lithium-Ion Battery Charge Controller
LM3420-16.8 Lithium-Ion Battery Charge Controller
LM3420-4.2 Lithium-Ion Battery Charge Controller
LM3420-8.2 Lithium-Ion Battery Charge Controller
LM3420-8.4 Lithium-Ion Battery Charge Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM3420-4.2, -8.2, -8.4, -12.6, -16.8 Lithium-Ion Battery Charge Controller May 1998 LM3420-4.2, -8.2, -8.4, -12.6, -16.8 Lithium-Ion Battery Charge Controller General Description 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.