Sunnyvale, Calif.Maxim Integrated Products has introduced the MAX4987AE/MAX4987BE overvoltage-protection (OVP) controllers with internal overcurrent protection.
The devices integrate low-capacitance (3pF, typ) diodes to provide robust, ±15kV ESD protection (Human Body Model) for Hi-Speed USB and USB (full-speed or low-speed) D+/D- signals. Space-constrained applications include cell phones, smartphones, PDAs, MP3 players, and portable video players that are attached to USB ports for connectivity or charging.
To reduce external component count and save space, the MAX4987AE/MAX4987BE integrate a low-Ron nFET that protects low-voltage systems from overvoltages up to 28V. They provide an overvoltage trip level of 6.15V, and undervoltage trip levels of 2.55V (MAX4987AE) and 4.2V (MAX4987BE), with a start-up delay of 30ms. A flag signal notifies the microcontroller when an overvoltage or undervoltage fault condition occurs.
The MAX4987AE/MAX4987BE also feature internal overcurrent protection of 1.5A (min) to protect the circuitry against short-circuit conditions. The devices can be controlled by an enable input.
The MAX4987AE/MAX4987BE are available in a small, 2mm x 3mm, 8-pin TDFN package and are fully specified over the -40°C to +85° Cextended temperature range.
Pricing: Starts at $1.30 (1000-up, FOB USA).
Datasheet: click here.
Maxim Integrated Products, www.maxim-ic.com