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Analog Devices Inc./Maxim Integrated MAX6397MATA+T
- Part No.:
- MAX6397MATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6397MATA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,505
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Product details
Overview
MAX6397MATA+T from Maxim Integrated is an overvoltage protection controller with integrated 5V linear regulator, designed to safeguard downstream loads against transients up to 72V input. It controls an external n-channel MOSFET in either disconnect (switch) or voltage-limit (sawtooth) mode, delivers 100mA regulated output at 37µA quiescent current, and operates from -40°C to +125°C in industrial power rails.
For engineers reviewing the MAX6397MATA+T datasheet, MAX6397MATA+T pinout, MAX6397MATA+T application, or MAX6397MATA+T equivalent, this device serves as a high-voltage transient-hardened protection solution requiring precise overvoltage threshold setting via SET resistor divider, thermal-aware MOSFET gate drive, and stable low-IQ bias for always-on subsystems.
Technical Context
The MAX6397MATA+T implements dual-mode overvoltage control: in switch mode, it pulls GATE low to fully disconnect load upon IN overvoltage; in limiter mode, it generates a sawtooth GATE waveform to regulate OUT at user-adjusted threshold. Its internal charge pump delivers 10V gate-to-source drive above IN (≥14V), ensuring low RDS(ON) enhancement of external n-MOSFETs.
It integrates a standalone linear regulator (5.0V ±1.5%, 100mA max) that remains active regardless of SHDN state or MOSFET conduction, with POK asserting at 92.5% VREG. Thermal shutdown disables both REG and GATE at +150°C with 20°C hysteresis, and UVLO enables operation only above 4.66V (rising).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5V to 72V - supports wide-input industrial and wall-cube supplies without pre-regulation |
| Overvoltage Threshold | Adjustable via SET pin (1.215V reference ±0.033V) - enables precise trip points using resistor dividers |
| GATE Drive Voltage | VGATE = VIN + 8.5V to +11.5V (typ) - ensures full enhancement of n-MOSFETs even at low VIN |
| Linear Regulator Output | 5.0V ±1.5% (MAX6397L), 100mA max - powers always-on logic or microcontrollers independently of main rail |
| Quiescent Current | 37µA (SHDN = GND) - enables ultra-low-power standby in battery-backed systems |
| Operating Temperature | -40°C to +125°C (TJ) - qualified for under-hood and factory-floor environments |
| Thermal Shutdown | +150°C activation, +130°C recovery - protects IC and co-located MOSFET via shared thermal island |
Pinout & Package
MAX6397MATA+T is housed in an 8-pin, 3mm × 3mm thermally enhanced TDFN-EP package with exposed pad (EP) soldered to PCB ground plane for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | High-voltage supply input | Bypass with ≥10µF capacitor; withstands up to +80V transient stress |
| 2 SHDN | Active-low shutdown control | Forces GATE low while keeping REG active; internally pulled down (1µA) |
| 3 SET | Overvoltage threshold reference input | 1.215V precision comparator input; sets trip point via resistor divider to IN or OUT |
| 4 POK | Open-drain power-good output | Asserts low when REG falls below 92.5% nominal; requires external pullup |
| 5 GND | Analog and power ground | Common reference for all signals; connects to EP for thermal path |
| 6 GATE | Charge-pump gate driver output | Drives external n-MOSFET gate; clamped to ≤18V above OUT to prevent FET damage |
| 7 OUT | Output voltage sense node | Connects to MOSFET source; used as feedback point in limiter mode |
| 8 REG | Fixed 5.0V linear regulator output | Sources up to 100mA; bypass with ≥4.7µF ceramic capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Dual overvoltage response modes | Configurable as fast-disconnect switch or closed-loop voltage limiter with sawtooth GATE |
| Integrated 5V/100mA linear regulator | Always-on operation independent of SHDN or MOSFET state; 37µA IQ |
| Charge-pump gate drive | Delivers 10V gate-to-source enhancement above IN to minimize RDS(ON) losses |
| Precision SET threshold | 1.215V ±0.033V reference with 4% hysteresis - enables accurate, stable overvoltage trip |
| Thermal shutdown with hysteresis | Disables REG and GATE at +150°C; recovers at +130°C - protects IC and adjacent MOSFET |
Applications
| Industrial Power Rails | FireWire® Power Delivery |
|---|---|
Use Scenario: Protecting PLC I/O modules from 48V DC bus transients during relay switching or lightning-induced surges. IC Role / Device Role / Timing Role: Overvoltage protection controller monitoring IN and driving external n-MOSFET to isolate sensitive analog front-ends. Use Value: Prevents latch-up or destruction of downstream ADCs and isolators by limiting fault energy transfer during >100V transients. |
Use Scenario: Securing FireWire cable-powered peripherals against hot-plug voltage spikes and reverse polarity events. IC Role / Device Role / Timing Role: Dual-function protector acting as switch during overvoltage and limiter during sustained overvoltage to maintain link negotiation. Use Value: Enables uninterrupted enumeration and data transfer by sustaining regulated 5V supply to PHY during 30V–60V transients. |
| Notebook Adapter Input Protection | Wall-Cube Power Devices |
Use Scenario: Guarding notebook motherboard power inputs against adapter overvoltage faults (e.g., 20V adapter misapplied to 19.5V system). IC Role / Device Role / Timing Role: Fast-response overvoltage switch that disconnects main rail within 100ns of threshold breach. Use Value: Eliminates need for costly TVS arrays by providing programmable, low-leakage protection with <1µA standby current. |
Use Scenario: Enabling compact, high-reliability AC/DC wall adapters with integrated overvoltage immunity for IoT edge devices. IC Role / Device Role / Timing Role: Combines primary-side overvoltage limiter and secondary-side always-on 5V bias generator in single TDFN package. Use Value: Reduces BOM count by integrating protection and auxiliary regulation, cutting footprint vs. discrete solutions by >40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26631RGER | Integrated 60V eFuse with current limiting and precise OV threshold (±1.5%), no integrated LDO | Best for current-limited hot-swap applications; lacks always-on 5V regulator and voltage-limiter mode | Select when precise current foldback and fault logging are required over voltage regulation |
| LT4363IMS-1#PBF | 75V surge protector with adjustable OV/UV thresholds, 100mA LDO, but larger MSOP-10 package and higher IQ (60µA) | Suitable for automotive-grade designs needing wider temp range (-40°C to +150°C) and higher surge immunity | Choose when board space allows larger package and higher quiescent current is acceptable for enhanced robustness |
Compared with MAX6397MATA+T, the TPS26631RGER offers superior current control but omits the always-on LDO and limiter mode; the LT4363IMS-1#PBF provides broader surge tolerance and automotive qualification but trades off size and quiescent current efficiency.
Availability
MAX6397MATA+T is available at Aetrix Electronics and suitable for industrial automation, FireWire® peripheral design, and wall-cube power delivery requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for MAX6397MATA+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6397 product line delivers high-voltage overvoltage protection controllers with integrated regulators for systems requiring transient resilience, low-power always-on bias, and compact footprint in harsh environments.
FAQ
What is the function of the SET pin on the MAX6397MATA+T?
The SET pin on the MAX6397MATA+T is a precision 1.215V reference input used to configure the overvoltage threshold via an external resistor divider. When the voltage at SET exceeds 1.215V, the device triggers overvoltage response-either pulling GATE low (switch mode) or initiating sawtooth regulation (limiter mode). The MAX6397MATA+T uses this pin to monitor either IN or OUT depending on circuit configuration, enabling flexible protection schemes without changing the IC.
Does the MAX6397MATA+T's linear regulator remain active during shutdown?
Yes, the MAX6397MATA+T's 5V linear regulator remains fully operational even when SHDN is driven low. Unlike the GATE output-which is forced low to turn off the external MOSFET-the REG output continues delivering up to 100mA at 37µA quiescent current. This behavior makes the MAX6397MATA+T ideal for powering always-on circuits such as real-time clocks, supervisor logic, or wake-up comparators independent of main power rail status.
How does the MAX6397MATA+T implement overvoltage limiting versus switching?
The MAX6397MATA+T implements overvoltage limiting by configuring the SET pin to monitor OUT instead of IN, causing GATE to generate a sawtooth waveform that regulates the MOSFET in switched-linear mode-maintaining constant output voltage during overvoltage. In contrast, overvoltage switching configures SET to monitor IN, resulting in immediate GATE pull-down and full load disconnection. Both modes use identical hardware; selection depends solely on resistor-divider connection per the MAX6397MATA+T datasheet.
What is the maximum allowable voltage on the IN pin of the MAX6397MATA+T?
The MAX6397MATA+T specifies an absolute maximum IN voltage of +80V, though its functional overvoltage protection range extends up to 72V continuous supply. During transient events, the device tolerates brief excursions to +80V provided external clamping (e.g., TVS diode) limits dV/dt and peak energy. The GATE-to-OUT clamp ensures MOSFET gate-source voltage stays ≤18V, protecting the external FET even during fast-rising transients monitored by the MAX6397MATA+T.
Can the MAX6397MATA+T be used with p-channel MOSFETs?
No, the MAX6397MATA+T is specifically designed to drive n-channel MOSFETs using its internal charge pump to generate gate voltage above IN. Its GATE output architecture-enhancing to VIN + 10V and clamping to VOUT + 18V-is incompatible with p-channel gate drive requirements (which need gate voltage below source). For p-channel solutions, discrete level-shifting or dedicated high-side drivers are required; the MAX6397MATA+T's functionality and pinout assume n-channel topology per its datasheet.
MAX6397MATA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.375V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX6397MATA+T FAQ
1.How can I place an order for MAX6397MATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6397MATA+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6397MATA+T reliable?
The price and inventory of MAX6397MATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6397MATA+T is usually 5 days.
3.What payment methods are accepted for MAX6397MATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6397MATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6397MATA+T?
MAX6397MATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6397MATA+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6397MATA+T?
For technical support, including MAX6397MATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6397MATA+T requirements.
6.How does Aetrix verify that MAX6397MATA+T is sourced from the original manufacturer or authorized distributors?
All MAX6397MATA+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6397MATA+T meets industry standards.
7.What is the process for return or replacement of MAX6397MATA+T?
All MAX6397MATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6397MATA+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6397MATA+T part is unused and in its original packaging.
Return procedure for MAX6397MATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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