Tuesday, January 29, 2008

Maxim announces overvoltage-protection controllers

Maxim Integrated Products introduces the MAX4987AE/MAX4987BE overvoltage-protection (OVP) controllers with internal overcurrent protection.

These 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. The MAX4987AE/MAX4987BE are ideal for space-constrained applications-such as 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 degrees Celsius to +85 degrees Celsius extended temperature range. Prices start at $1.30 (1000-up, FOB USA).

Maxim Integrated Products, a two billion dollar company, designs and manufactures ICs for analog and mixed-signal applications.  The company's broad portfolio of 27 product lines is among the industry's deepest, with over 5400 products.


The MAX4987AE/MAX4987BE are overvoltage-protection controllers that integrate ESD protection for USB data lines.

These devices provide robust ESD protection for Hi-Speed USB and USB (full-speed or low-speed) D+/D- signals.

These OVP controllers integrate low-capacitance (3pF, typ) ESD-protection diodes to allow transmission of USB 2.0 signals.

The MAX4987AE/MAX4987BE are ideal for mobile devices-such cell phones, smartphones, PDAs, and personal entertainment systems-that are attached to USB ports for connectivity or charging.

Contact details

For further information contact Maxim Integrated Products on 1 800 998 8800.

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