Overvoltage Protection Controllers have integrated nFET.
Press Release Summary:
Supplied in 2 x 2 mm 8-pin µDFN package, MAX4943-MAX4946/MAX4949 devices implement battery charging from wall adapter while providing overvoltage protection up to +28 V. Products integrate nFET switch and provide overvoltage trip levels from 4.56-8.9 V as well as undervoltage trip levels from 2.45-4.15 V. Along with thermal-shutdown protection and 1.7 A (typ) current-limiting function, additional features include FLAG signal, ±15 kV ESD protection, and 30 ms startup delay/retry times.
Original Press Release:
Overvoltage-Protection Controllers with Integrated nFET
The MAX4943-MAX4946/MAX4949 is a family of overvoltage protection controllers.
MAX4943-MAX4946/MAX4949 integrate an nFET, eliminating the need for an external FET.
An nFET requires a smaller area (almost half) than a pFET, for a given RON, thus saving space.
The MAX4943-MAX4946/MAX4949 are ideal for devices that implement battery charging from a wall adapter.
SUNNYVALE, CA-August 2, 2007-Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX4943*-MAX4946/MAX4949 overvoltage-protection (OVP) controllers with an integrated nFET. These devices provide OVP up to +28V.
The MAX4943-MAX4946/MAX4949 provide overvoltage trip levels from 4.56V to 8.9V and undervoltage trip levels from 2.45V to 4.15V. Integrating the nFET switch into the devices' 2mm x 2mm µDFN package reduces the overall external system component count and required board space. Consequently, these devices are ideal for space-constrained applications such as cell phones, digital still cameras, PDAs, and MP3 players.
Additional controller features include a 1.7A (typ) current-limiting function to protect the circuitry against short-circuit conditions, a FLAG signal to notify the processor that an overvoltage or undervoltage fault condition occurred, thermal-shutdown protection, ±15kV ESD protection, and 30ms startup delay and retry times.
These OVP controllers are specified to operate over the -40°C to +85°C industrial temperature range. The MAX4943-MAX4946/MAX4949 are available in a 2mm x 2mm, 8-pin µDFN package. Prices start at $1.14 (1000-up, FOB USA).
*Future product-contact factory for availability
