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Data Sheet

FULL DATA SHEET (PDF, 380kB) Download   E-Mail

Description

The MAX6397/MAX6398 are small, high-voltage overvoltage protection circuits. These devices disconnect the output load or limit the output voltage during an input overvoltage condition. These devices are ideal for applications that must survive high-voltage transients such as those found in automotive and industrial applications. The MAX6397/MAX6398 monitor the input or output voltages and control an external n-channel MOSFET to isolate or limit the load from overvoltage transient energy. When the monitored input voltage is below the user-adjustable overvoltage threshold, the external n-channel MOSFET is turned on by the GATE output. In this mode, the internal charge pump fully enhances the n-channel MOSFET with a 10V gate-to-source voltage. When the input voltage exceeds the overvoltage threshold, the protection can disconnect the load from the input by quickly forcing the GATE output low. In some applications, disconnecting the output from the load is not desirable. In these cases, the protection circuit can be configured to act as a voltage limiter where the GATE output sawtooths to limit the voltage to the load. The MAX6397 also offers an always-on linear regulator that is capable of delivering up to 100mA of output current. This high-voltage linear regulator consumes only 37µA of quiescent current. The regulator is offered with output options of 5V, 3.3V, 2.5V, or 1.8V. An open-drain, power-good output (POK) asserts when the regulator output falls below 92.5% or 87.5% of its nominal voltage. The MAX6397/MAX6398 include internal thermal-shutdown protection, disabling the external MOSFET and linear regulator if the chip reaches overtemperature conditions. The devices operate over a wide 5.5V to 72V supply voltage range, are available in small TDFN packages, and are fully specified from -40°C to +125°C.

Key Features		Applications/Uses
5.5V to 72V Wide Supply Voltage Range Overvoltage Protection Controllers Allow User to Size External n-Channel MOSFETs Internal Charge-Pump Circuit Ensures MOSFET Gate-to-Source Enhancement for Low RDS(ON) Performance Disconnect or Limit Output from Input During Overvoltage Conditions Adjustable Overvoltage Threshold Thermal-Shutdown Protection Always-On, Low-Current (37µA) Linear Regulator Sources Up to 100mA (MAX6397) Fully Specified from -40°C to +125°C (TJ) Small, Thermally Enhanced 3mm x 3mm TDFN Package		Automotive FireWire® Industrial Notebook Computers Wall Cube Power Devices

Diagram

Typical Operating Circuit

Application Notes

Application Note 3893: High-Frequency Automotive Power Supplies - MAX6398 Application Note 4081: Alternate Circuits for Overvoltage Protection: Tips and Tricks - MAX6397, MAX6398 Application Note 4240: Active High-Voltage Transient Protectors Trump Conventional Approaches in Automotive Electronics - MAX6397, MAX6398

Evaluation Kits

MAX6397EVKIT

Reliability Reports

Show FIT data for: MAX6397 MAX6398 Request Reliability Report for: MAX6397 MAX6398

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: 1-36 of 36
MAX6397	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6397LATA+			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397LATA			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397MATA+			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397MATA			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	See data sheet Materials Analysis
MAX6397SATA+			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397SATA			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397TATA+			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397TATA			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397VATA+			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397VATA			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397WATA+			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397WATA			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397YATA+			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397YATA			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397ZATA+			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397ZATA			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397LATA-T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397ZATA+T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397YATA+T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397VATA-T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397WATA-T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397YATA-T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397ZATA-T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397MATA-T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	See data sheet Materials Analysis
MAX6397TATA-T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397SATA-T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6397LATA+T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397MATA+T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397SATA+T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397TATA+T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397VATA+T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6397WATA+T			THIN QFN (Dual);8 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T833+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6398	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6398ATT+			THIN QFN (Dual);6 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T633+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6398ATT			THIN QFN (Dual);6 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T633-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6398ATT+T			THIN QFN (Dual);6 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T633+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6398ATT-T			THIN QFN (Dual);6 pin;10 mm² Dwg: 21-0137I (PDF) Use pkgcode/variation: T633-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis

More Information

Topmark Coding: MAX6397 MAX6398 New Product Press Release 2005-05-26  Product Ad: Download

Related Products

MAX6399 High-Voltage, Overvoltage/Undervoltage, Protection Switch Controller MAX16010, MAX16011, MAX16012, MAX16013, MAX16014 Ultra-Small, Overvoltage Protection/Detection Circuits

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