Accurate Overvoltage Protectors with Active Current Limiting
OVPs protect low-voltage systems against voltage faults up to +28V
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Note to Editor:
The MAX4978–MAX4981 are accurate overvoltage protectors with active current limiting.
They protect low-voltage systems against voltage faults up to 28V. A second layer of protection is provided by the active current limiter of either 0.9A or 1.95A.
Customers can choose from two popular OVLO thresholds: 5.7V or 6.8V.
Designed to protect the charger input port of portable devices, the MAX4978–MAX4981 are ideal for cell phones, MP3 players, digital still cameras (DSCs), and PDAs.
SUNNYVALE, CA—September 2, 2008—Maxim Integrated Products (PINK OTC MARKETS: MXIM) introduces the MAX4978–MAX4981 overvoltage protectors (OVPs) with active current limiting. They protect low-voltage systems against voltage faults up to 28V with 5.7V and 6.8V threshold options. The active current limiter provides a second layer of defense for the protected device and is available in 0.9A and 1.95A threshold options. Designed to protect the charger input port of portable devices, these OVPs are ideal for cell phones, MP3 players, digital still cameras (DSCs), and PDAs.
The MAX4978–MAX4981 provide ±15kV ESD input protection when a 1µF ceramic capacitor is connected from VIN to ground. Additionally, the MAX4980/MAX4981 include battery-overcharge protection that monitors the voltage on the Li-ion battery being charged. Once this monitored voltage reaches 4.4V, the switch is disconnected to avoid overcharging.
Packaged in a lead-free, 2mm x 3mm, 8-pin TDFN with an exposed pad, the MAX4978–MAX4981 are fully specified over the -40°C to +85°C extended temperature range. Prices start at $1.47 (1000-up, FOB USA).
Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells over $2 billion of high-performance semiconductor products annually. It was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, Maxim has developed over 5700 products serving the industrial, communications, consumer, and computing markets. For more information, go to www.maxim-ic.com.
