Charging handhelds

has introduced the LTC4065 and LTC4065A, fully integrated standalone linear battery chargers that can charge a single-cell Li-Ion battery up to 750mA without overheating the device or surrounding components.

These full-featured ICs are said to offer timer termination, recharge, trickle charge, and C/10 detection and are housed in a 6-lead 2mm x 2mm DFN package.

A complete solution requires only two discrete components (input capacitor and a charge current program resistor) and fits into a 2.5mm x 2.7mm 0.75mm form factor. Applications include digital still cameras, portable point-of-sale and diagnostic equipment, cell phones, PDAs and USB-equipped handheld devices.

The LTC4065/A is said to require no external MOSFET, sense resistor or blocking diode. A patented thermal regulation scheme prevents the junction temperature of the IC from exceeding 115 degrees C by reducing charge current during high power or high ambient temperature operation.

Other features of the LTC4065/A include a charge current monitor output for charge termination, a 4.2V 0.5% accurate float voltage, and 5% charge accuracy. Charge current is adjustable with a standard off-the-shelf resistor.