Sunnyvale, Calif.—Maxim says its MAX8730 battery charger IC with integrated 3.3-volt low dropout regulator (LDO) offers the industry's most complete and cost-effective solution for notebook computer and portable equipment applications. The MAX8730 (using appropriate power MOSFET stages and supporting circuitry) will deliver up to 3.5 amps for three to four lithium-ion cells in series.
The chip's LDO provides 20 mA for external circuitry or ICs, such as a keyboard controller. Two analog inputs are provided to set charge current and charge voltage. The chip can be hardwired or controlled by a microprocessor to set the charging current or voltage.
Monitor outputs indicate adapter current, battery-discharge current, and the presence of an AC adapter.
The chip will automatically select the appropriate source (AC adapter or battery source) for powering the system. It will suitably limit the current delivered by the adapter appropriate to the system load. The MAX8730 features 0.5 percent battery-voltage regulation.
Click here for the summary sheet and to access the product datasheet. The MAX8730, in a 28-pin, 5-by-5 mm QFN as well as a lead-free package and specified for the extended industrial temperature range (-40 to +85°C), is priced starting at $5.04 each (1000-up, FOB USA).
Maxim Integrated Products, 1-800-998-8800, www.maxim-ic.com