The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-of-charge control for Lithium-Ion rechargeable batteries.
The LM3420 series consists of monolithic integrated circuits available in five fixed voltage versions (4.2V, 8.2V/8.4V, 12.6V, and 16.8V) for one through four cell charger applications. Each device includes an internally compensated op amp, a bandgap reference with temperature drift curvature correction, an NPN output transistor capable of driving up to 15 mA, and voltage setting resistors.
| Regulation Voltage (4.2V version) | 4.2 V typical, 0.5% max tolerance |
|---|---|
| Quiescent Current | 85 uA typical (max 150 uA) |
| Output Drive Capability | Up to 15 mA |
| Operating Temperature Range | -40°C to +125°C |
| Package Type | SOT23-5 (M5) |
The LM3420 is available in five fixed voltage versions: 4.2V, 8.2V/8.4V, 12.6V, and 16.8V.
Yes, it is suitable for both linear and switching regulator charger designs.