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MAX4865

Maxim Integrated Products
Part Number MAX4865
Manufacturer Maxim Integrated Products
Description (MAX4864L - MAX4867) Overvoltage Protection Controllers
Published Oct 22, 2010
Detailed Description DataSheet.in 19-3582; Rev 1; 5/06 Overvoltage Protection Controllers with Reverse Polarity Protection General Descript...
Datasheet PDF File MAX4865 PDF File

MAX4865
MAX4865

Overview
DataSheet.
in 19-3582; Rev 1; 5/06 Overvoltage Protection Controllers with Reverse Polarity Protection General Description The MAX4864L/MAX4865L/MAX4866L/MAX4867/ MAX4865/MAX4866 overvoltage 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.
The MAX4865/MAX4866 have a 4.
15V 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 MAX4864L/MAX4865L/MAX4866L/MAX4867/MAX4865/MAX4866 Ordering Information PART M...


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