Maxim > Products > Automotive products > MAX6397, MAX6398
Maxim > Products > Supervisors, voltage trackers, and sequencers > MAX6397, MAX6398

MAX6397, MAX6398
Overvoltage Protection Switch/Limiter Controllers Operate Up to 72V

Overview

Technical Documents

Ordering Info

User Comments (0)

All

Status

Active: In Production.

Data Sheet

FULL DATA SHEET Download Rev 5 (PDF, 304kB) 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.

An evaluation kit is available: MAX6397EVKIT

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
Application Note 4081	Alternate Circuits for Overvoltage Protection: Tips and Tricks
Application Note 4240	Active High-Voltage Transient Protectors Trump Conventional Approaches in Automotive Electronics
Application Note 4384	Boost Backlight LED Driver

Evaluation Kits
MAX6397EVKIT	Evaluation Kit for the MAX6397

Reliability Reports
Show FIT data for:	MAX6397MAX6398
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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

Filters

Part Number: Package: Any -------- TDFN Temperature: Any -------- -40°C to +125°C Tape and Reel

MAX6397	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6397SATA+			Active	TDFN-EP;8 pin;9.6 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
MAX6397MATA+			Active	TDFN-EP;8 pin;9.6 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
MAX6397YATA+			Active	TDFN-EP;8 pin;9.6 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
MAX6397ZATA+			Active	TDFN-EP;8 pin;9.6 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
MAX6397WATA+			Active	TDFN-EP;8 pin;9.6 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
MAX6397LATA+			Active	TDFN-EP;8 pin;9.6 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
MAX6397VATA+			Active	TDFN-EP;8 pin;9.6 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
MAX6397MATA+T			Active	TDFN-EP;8 pin;9.6 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
MAX6397ZATA-T			Active	TDFN-EP;8 pin;9.6 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
MAX6397WATA-T			Active	TDFN-EP;8 pin;9.6 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
MAX6397SATA-T			Active	TDFN-EP;8 pin;9.6 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
MAX6397VATA+T			Active	TDFN-EP;8 pin;9.6 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
MAX6397VATA-T			Active	TDFN-EP;8 pin;9.6 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
MAX6397LATA+T			Active	TDFN-EP;8 pin;9.6 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
MAX6397MATA-T			Active	TDFN-EP;8 pin;9.6 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
MAX6397WATA+T			Active	TDFN-EP;8 pin;9.6 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
MAX6397ZATA+T			Active	TDFN-EP;8 pin;9.6 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
MAX6397LATA-T			Active	TDFN-EP;8 pin;9.6 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
MAX6397YATA-T			Active	TDFN-EP;8 pin;9.6 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
MAX6397TATA-T			Active	TDFN-EP;8 pin;9.6 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
MAX6397SATA+T			Active	TDFN-EP;8 pin;9.6 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
MAX6397YATA+T			Active	TDFN-EP;8 pin;9.6 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
MAX6397TATA+T			Active	TDFN-EP;8 pin;9.6 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
MAX6398	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6398ATT+			Active	TDFN; Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6398ATT-T			Active	TDFN-EP;6 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0058 (PDF) Use pkgcode/variation: T633-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6398ATT+T			Active	TDFN;6 pin Land Pattern: Not Available	-40°C to +125°C	See data sheet

Related Products
MAX6397EVKIT	Evaluation Kit for the MAX6397
MAX16010, MAX16011, MAX16012, ...	Ultra-Small, Overvoltage Protection/Detection Circuits
MAX6399	High-Voltage, Overvoltage/Undervoltage, Protection Switch Controller
More Like This: View Product Families for Similar Products See All Linear Regulators (153 Products) See All Overvoltage Protection Controllers (55 Products) See All Supervisors (1 Monitored Voltage) (274 Products)

More Information
Topmark Coding	MAX6397
Topmark Coding	MAX6397L
Topmark Coding	MAX6397M
Topmark Coding	MAX6397S
Topmark Coding	MAX6397T
Topmark Coding	MAX6397V
Topmark Coding	MAX6397W
Topmark Coding	MAX6397Y
Topmark Coding	MAX6397Z
Topmark Coding	MAX6398
New Product Press Release	[ 2005-05-26 ]

We Want Your Feedback!

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers Parametric Search Applications Help

Document Ref.: 19-3668 Rev 5; 2009-01-15
This page last modified: 2009-01-15