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MAX4864LEUT Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX4864LEUT Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 11 page Overvoltage Protection Controllers with Reverse Polarity Protection ________________________________________________________________ Maxim Integrated Products 1 Typical Operating Circuit For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. General Description The MAX4864L/MAX4865L/MAX4866L/MAX4867 over- voltage protection controllers protect low-voltage sys- tems 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 inter- nal 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 fur- ther (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. Applications 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 19-3582; Rev 2; 5/10 Ordering Information PART PIN- PACKAGE OV TRIP LEVEL (V) TOP MARK MAX4864LEUT-T 6 SOT23-6 7.40 ABVO MAX4864LELT 6 μDFN 7.40 AAE MAX4865LEUT-T 6 SOT23-6 6.35 ABVP MAX4865LELT 6 μDFN 6.35 AAF MAX4866LEUT-T 6 SOT23-6 5.80 ABVQ MAX4866LELT 6 μDFN 5.80 AAG MAX4867EUT-T 6 SOT23-6 4.65 ABVN MAX4867ELT 6 μDFN 4.65 AAD Functional Diagram appears at end of data sheet. Note: All devices are specified over the -40°C to +85°C operating temperature range. T = Tape and reel. ADAPTER (-28V TO +28V) OUTPUT VIO IN FLAG GATEN 1 μF GND EN GATEP MAX4864L MAX4865L MAX4866L MAX4867 PN Cell Phones Digital Still Cameras PDAs and Palmtop Devices MP3 Players |
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