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High-Voltage, Overvoltage-Protection Controllers with Battery Switchover Protect Low-Voltage Systems Up to 28V
Note to Editor:
- The MAX4959/MAX4960 are high-voltage, overvoltage-protection (OVP) controllers with battery-switchover functionality.
- The MAX4959/MAX4960 protect low-voltage systems up to 28V and switch to the battery when an external AC adapter is unplugged.
- To implement OVP and battery switchover, these devices drive two external pFETs.
- The MAX4959/MAX4960 OVP controllers are ideal for ultra-mobile PCs, notebooks, and camcorders.
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SUNNYVALE, CA—December 6, 2007—Maxim Integrated Products (Pink Sheets: MXIM) introduces the MAX4959/MAX4960 overvoltage-protection (OVP) controllers with battery-switchover functionality. Designed to protect low-voltage systems up to 28V, these devices provide resistor-programmable overvoltage (6V to 28V) and undervoltage (5V to 28V) trip levels. To implement this OVP and prevent damage to protected components, the MAX4959/MAX4960 turn off an external pFET when the input voltage exceeds the overvoltage threshold. Subsequently, they hold the external pFET off until the input voltage rises above the undervoltage-lockout (UVLO) threshold. These controllers also feature a control-bit pin that switches to the battery when the host system detects a disconnect at the AC adapter. This combination of OVP and battery-switchover functionality makes the MAX4959/MAX4960 ideal for low-voltage systems such as ultra-mobile PCs, notebooks, and camcorders.
The MAX4959/MAX4960 provide ±15kV ESD protection (Human Body Model) on the input when the input is bypassed with an external 1µF ceramic capacitor. These controllers are fully specified over the -40°C to +85°C extended temperature range, and are available in tiny, 2mm x 2mm, 10-pin µDFN and 3mm x 5mm, 10-pin µMAX® packages. Prices start at $0.90 (1000-up, FOB USA).
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