Maxim Integrated Products MAX8804Y and MAX8804Z: USB/ac-adapter chargers withstand 30V dc or 16V USB input voltages

Suiting one-cell lithium-ion batteries, the high-voltage, dual-input, stand-alone MAX8804Y and MAX8804Z USB/ac-adapter chargers provide protection by shutting off input voltages greater than 7.5V, withstanding an input voltage as high as 30V dc or 16V USB, and integrating thermal-regulations circuitry. The devices feature intelligent USB/dc-input circuitry that can automatically select either a USB- or an ac-adapter input source. The chargers integrate two high-voltage, low-on-resistance charging FETs, a reverse-current-blocking diode, a current-sensing resistor, and input-overvoltage-protection circuitry. The MAX8804Y provides a fast-charging start without a precharging stage, and the MAX8804Z uses a prequalification charging stage bringing battery voltage to 2.5V. Measuring 6×6 mm in a TDFN package, the MAX8804Y and MAX8804Z cost $1.40 (2500) each.

Maxim Integrated Products, www.maxim-ic.com