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Data Sheet

FULL DATA SHEET (PDF, 644kB) Download   E-Mail

Description

The MAX6399 is a small overvoltage and undervoltage protection circuit. The device can monitor a DC-DC output voltage and quickly disconnect the power source from the DC-DC input load when an overvoltage condition occurs. A power-OK output signals when the DC-DC input voltage falls below an adjustable threshold. This controller architecture provides the ability to size the external n-channel MOSFET to meet specific load current requirements. When the DC-DC monitored output voltage is below the user-adjustable overvoltage threshold, the GATE output of the MAX6399 goes high to enhance the n-channel MOSFET. The MAX6399 offers internal charge-pump circuitry that allows the GATE voltage to be 10V above the input voltage (VGS = 10V) to fully enhance the external n-channel MOSFET, thus minimizing the drain-to- source resistance. When the monitored output voltage rises above the user-adjusted overvoltage threshold, the GATE output rapidly pulls low to shut off the MOSFET. The MOSFET remains latched off until either the MAX6399 input power or SHDN-bar input is cycled. The MAX6399 includes a logic-low shutdown input that disables the GATE. An internal overtemperature detector also disables the gate when the MAX6399 temperature reaches the thermal-shutdown threshold. The device operates over a wide supply voltage range (5.75V to 72V) and is offered in a small TDFN package, fully specified from -40°C to +125°C.

Key Features		Applications/Uses
Wide Supply Voltage Range (5.75V to 72V) Internal Charge Pump Ensures n-Channel MOSFET is Fully Enhanced During Normal Operation (VGS = 10V) Fast GATE Shutoff During Overvoltage with 20mA Sink Capability Latches Off External n-Channel MOSFET During High-Voltage Transients Adjustable DC-DC Input Undervoltage Threshold Power-OK Output Adjustable DC-DC Output Overvoltage Thresholds Overtemperature Shutdown Protection Fully Specified from -40°C to +125°C		Networking RAID Server Telecom

Diagram

Typical Operating Circuit

Application Notes

Application Note 4240: Active High-Voltage Transient Protectors Trump Conventional Approaches in Automotive Electronics - MAX6399

Evaluation Kits

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Reliability Reports

Show FIT data for: MAX6399 Request Reliability Report for: MAX6399

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-4 of 4
MAX6399	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6399ATA			TDFN-EP;8 pin;10 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6399ATA+			TDFN-EP;8 pin;10 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6399ATA-T			TDFN-EP;8 pin;10 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6399ATA+T			TDFN-EP;8 pin;10 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis

Related Products

MAX6397, MAX6398 Overvoltage Protection Switch/Limiter Controllers Operate Up to 72V MAX16010, MAX16011, MAX16012, MAX16013, MAX16014 Ultra-Small, Overvoltage Protection/Detection Circuits

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