Maxim Integrated MAX4865LELT T

Description
The MAX4864L/MAX4865L/MAX4866L/MAX4867 over-voltage protection controllers protect low-voltage systems against high-voltage faults up to 28V, and negative voltages down to -28V. These devices drive a low-cost complementary MOSFET. If the input voltage exceeds the overvoltage threshold, these devices turn off the n-channel MOSFET to prevent damage to the protected components. If the input voltage drops below ground, the devices turn off the p-channel MOSFET to prevent damage to the protected components. An internal charge pump eliminates the need for external capacitors and drives the MOSFET GATEN for a simple, robust solution.
The overvoltage thresholds are preset to 7.4V (MAX4864L), 6.35V (MAX4865L), 5.8V (MAX4866L), and 4.65V (MAX4867). When the input voltage drops below the undervoltage lockout (UVLO) threshold, the devices enter a low-current standby mode (8.5μA). Also in shutdown (EN set to logic-high), the current is reduced further (0.4μA). The MAX4864L/MAX4865L/MAX4866L have a 2.85V UVLO threshold, and the MAX4867 has a 2.5V UVLO threshold.
In addition, a 15kV ESD protection is provided to the input when bypassed with a 1μF capacitor to ground. All devices are offered in a small 6-pin SOT23 and a 6-pin, 2mm x 2mm μDFN package, and are specified for operation over the -40°C to 85°C temperature range.

Features
Overvoltage Protection Up to 28V
Reverse Polarity Protection Down to -28V
Preset Overvoltage (OV) Trip Level (7.4V, 6.35V, 5.8V, 4.65V)
Drive Low-Cost Complementary MOSFET
Internal 50ms Startup Delay
Internal Charge Pump
8.5μA Standby Current (In UVLO Mode)
0.4μA Shutdown Current
Overvoltage Fault FLAG Indicator
6-Pin (2mm x 2mm) μDFN and 6-Pin SOT23 Packages

Applications
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players