LM3420 Overview
The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-ofcharge control for lithium-ion rechargeable batteries. The LM3420 is available in an 8.4-V version for one through four cell charger applications. Included in a very small package is an (internally pensated) op amp, a bandgap reference, an NPN output transistor, and voltage setting resistors.
LM3420 Key Features
- 1 Input Voltage Range: up to 20 V
- Voltage Options for Charging 1, 2, 3, or 4 Cells
- Output Current up to 15 mA
- Precision (0.5%) End-of-Charge Control
- LM3420 ±1%
- LM3420A ±0.5%
- Drive Capability for External Power Stage
- Temperature Drift Curvature Correction for Voltage Stability
- Low Quiescent Current, 85 μA (Typ.)
- Tiny SOT-23-5 package
