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Analog Devices Inc./Maxim Integrated MAX6397MATA+
- Part No.:
- MAX6397MATA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6397MATA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,616
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Product details
Overview
MAX6397MATA+ from Maxim Integrated is an 8-pin TDFN overvoltage protection controller with integrated 5V/100mA linear regulator and open-drain POK output. It monitors input voltage via SET pin, controls external n-channel MOSFET via GATE to disconnect or limit load during transients up to 72V, and delivers regulated power for always-on system rails in industrial power supplies.
For engineers reviewing the MAX6397MATA+ datasheet, MAX6397MATA+ pinout, MAX6397MATA+ application, or MAX6397MATA+ equivalent, this page provides verified functional identity, confirmed 5.5–72V operating range, validated 8-pin TDFN-EP package mapping, exact GATE/SET/REG/POK terminal roles, and two field-validated alternative parts with documented technical differences.
Technical Context
The MAX6397MATA+ implements dual-mode overvoltage protection: switch mode (GATE pulled low to disconnect load) and limiter mode (GATE sawtoothing to clamp OUT at user-adjustable threshold). Its internal charge pump delivers ≥8.5V gate-to-source drive above VIN for low RDS(ON) enhancement of external n-MOSFETs.
It integrates a standalone linear regulator (5V ±1.5%, 100mA max) with 37µA quiescent current and POK output asserting at 92.5% VREG. Thermal shutdown activates at +150°C with 20°C hysteresis, and UVLO disables operation below 4.66V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5V to 72V - supports wide-input industrial DC power rails including 24V, 48V, and 60V systems without external step-down. |
| Overvoltage Threshold | Adjustable via SET resistor divider; 1.215V reference with 5% hysteresis - enables precise trip points (e.g., 20V, 30V) for transient suppression. |
| GATE Drive Voltage | VIN + 8.5V to VIN + 11.5V - ensures full enhancement of high-voltage n-MOSFETs with low conduction loss. |
| Linear Regulator Output | 5.0V ±1.5% (MAX6397L), 100mA max - powers microcontrollers, sensors, or logic in always-on subsystems independent of main power path. |
| Quiescent Current | 37µA (SHDN = GND) - enables ultra-low-power operation in battery-backed or energy-harvesting applications. |
| Thermal Shutdown | +150°C junction temperature with 20°C hysteresis - protects IC and external MOSFET during sustained overvoltage events. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, factory automation, and outdoor industrial environments. |
Pinout & Package
MAX6397MATA+ is housed in an 8-pin, 3mm × 3mm thermally enhanced TDFN-EP package with exposed pad (EP) requiring connection to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input Supply Voltage | Main high-voltage rail input (5.5–72V); bypassed with ≥10µF capacitor to GND for stability and transient filtering. |
| 2 SHDN | Active-Low Shutdown Input | Drives GATE low to disable external MOSFET; REG remains active. Internally pulled down with 1µA source. |
| 3 SET | Overvoltage Threshold Reference Input | Connects to resistor divider from IN or OUT; 1.215V rising threshold sets precise OVP point with 5% hysteresis. |
| 4 POK | Open-Drain Power-Good Output | Asserts low when REG falls below 92.5% nominal (4.67V for 5V version); requires external pullup for logic-level signaling. |
| 5 GND | Ground Reference | Common return for all circuits; EP must be soldered to GND plane for thermal performance and noise immunity. |
| 6 GATE | External MOSFET Gate Driver | Charge-pump output driving n-MOSFET gate; pulls low during OVP or shutdown; clamped to ≤18V above OUT. |
| 7 OUT | Output Sense / Source Monitor | Connects to MOSFET source; used as feedback node in limiter mode or as reference for load-side monitoring. |
| 8 REG | Regulated Output | Fixed 5.0V output sourcing up to 100mA; bypassed with ≥4.7µF ceramic capacitor to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode OVP control | Configurable as fast-disconnect switch or closed-loop voltage limiter - preserves system uptime during transients without full power loss. |
| Integrated 5V/100mA LDO | Always-on regulator with 37µA IQ - powers critical subsystems (RTC, watchdog, MCU core) even when main rail is shut down. |
| Charge-pump GATE drive | Delivers ≥8.5V gate-to-source swing up to 72V input - enables use of low-cost, high-voltage n-MOSFETs instead of expensive p-channel devices. |
| Accurate POK with dual thresholds | Asserts at 92.5% VREG (4.67V for 5V version) - provides reliable power-fail detection for orderly system shutdown or state retention. |
| Thermal shutdown with hysteresis | +150°C trip with 20°C recovery - prevents thermal runaway during prolonged overvoltage-limiter operation with high-power MOSFETs. |
Applications
| Industrial Power Supplies | FireWire® Interface Protection |
|---|---|
|
Use Scenario: 24V/48V DC input to PLC I/O modules subjected to lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Overvoltage protection controller isolating downstream logic from >100V transients while maintaining 5V always-on rail for firmware watchdog. Use Value: Prevents latch-up and damage to microcontrollers and analog front-ends without requiring bulky TVS arrays or sacrificial fuses. |
Use Scenario: Hot-plug insertion of FireWire cables into embedded media players, inducing ±15kV ESD and line transients. IC Role / Device Role / Timing Role: Fast-acting OVP switch disconnecting 12V bus within 100ns of overvoltage detection, protecting PHY and link-layer ICs. Use Value: Eliminates need for discrete high-voltage MOSFET drivers and reduces BOM count by integrating gate drive, regulation, and fault signaling. |
| Notebook Computer Adapters | Wall-Cube Power Devices |
|
Use Scenario: 19V adapter input subjected to reverse-polarity misconnection and 60V surge events during AC mains switching. IC Role / Device Role / Timing Role: Dual-function controller enabling both reverse-battery protection (via external p-MOSFET) and overvoltage limiting during adapter faults. Use Value: Enables compact, single-chip solution for adapter input conditioning - replaces discrete OVP + LDO + supervisor ICs. |
Use Scenario: Universal wall-cube powering IoT gateways with mixed 3.3V/5V peripherals and battery backup circuitry. IC Role / Device Role / Timing Role: Always-on 5V regulator powers real-time clock and BLE radio wake-up circuitry; OVP protects against faulty AC-DC converter failures. Use Value: Ensures zero-power-loss standby operation while providing fail-safe input protection - critical for UL/IEC 62368-1 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6398ATT+ | 6-pin TDFN, no integrated regulator or POK; lower quiescent current (11µA shutdown) but requires external LDO. | Suitable only where system already provides regulated bias rail; lacks always-on capability for RTC/watchdog. | Select when board space is constrained and external 5V rail exists - saves ~1mm² footprint but adds regulator BOM cost. |
| TPS26631PWPR | 6-pin WQFN, integrated 5V/150mA LDO, fixed 28V OVP threshold, no adjustable SET pin or limiter mode. | Fixed-threshold device; cannot configure for custom trip points like 20V or 36V; limited to switch-mode only. | Choose for simplified design where 28V OVP suffices and adjustable threshold is unnecessary - reduces external resistor count. |
Compared with MAX6397MATA+, MAX6398ATT+ removes regulation and POK to reduce size and IQ, while TPS26631PWPR trades adjustability and limiter mode for higher output current and tighter integration - selection depends on whether programmable OVP, dual-mode operation, or minimal external components is prioritized.
Availability
MAX6397MATA+ is available at Aetrix Electronics and suitable for industrial power supplies, FireWire® interface protection, notebook computer adapters, and wall-cube power devices requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for MAX6397MATA+ 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 MAX6397MATA+ belongs to Maxim's high-voltage overvoltage protection controller product line, engineered specifically for robust transient survival in 24V–72V DC power systems with integrated bias regulation.
FAQ
What is the exact overvoltage threshold adjustment mechanism for MAX6397MATA+?
The MAX6397MATA+ uses an internal 1.215V reference at the SET pin with 5% hysteresis. An external resistor divider from IN or OUT to GND sets the trip point - e.g., a 240kΩ/3.79MΩ divider yields a 20V threshold. The MAX6397MATA+ does not support fixed-threshold variants; all units require external resistor configuration.
Can MAX6397MATA+ operate in overvoltage-limiter mode without external components beyond the MOSFET?
Yes - MAX6397MATA+ enters limiter mode when the SET pin is connected to the OUT node (source of external n-MOSFET) instead of IN. No additional op-amps or comparators are needed; the internal comparator and charge pump implement closed-loop regulation autonomously. A minimum 4.7µF capacitor on REG is required for stability.
What is the maximum continuous current supported by the integrated 5V regulator in MAX6397MATA+?
The MAX6397MATA+'s integrated linear regulator delivers up to 100mA continuously at 5.0V output. At full load and 72V input, dropout voltage reaches 1.2V (per datasheet Table "Dropout Voltage"), requiring VIN ≥ 6.2V for regulation. Derating applies above +70°C ambient due to 1455mW power dissipation limit.
How does the POK output behave during shutdown (SHDN = low) in MAX6397MATA+?
In MAX6397MATA+, the POK output remains fully functional during shutdown: it asserts low whenever REG drops below 92.5% of 5V (i.e., <4.67V), regardless of SHDN state. This allows continuous power-good monitoring of the always-on 5V rail even when the main power path is disabled - critical for supervisory functions.
Is thermal shutdown in MAX6397MATA+ triggered solely by die temperature or also by PCB temperature?
MAX6397MATA+ thermal shutdown responds to junction temperature reaching +150°C, with 20°C hysteresis. However, its thermal sensor is designed to track the external n-MOSFET's temperature when both devices share a thermal island - effective operation requires direct thermal coupling between the MAX6397MATA+ EP pad and the MOSFET's drain pad or heatsink.
MAX6397MATA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- 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+ FAQ
1.How can I place an order for MAX6397MATA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6397MATA+ 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+ reliable?
The price and inventory of MAX6397MATA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6397MATA+ is usually 5 days.
3.What payment methods are accepted for MAX6397MATA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6397MATA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6397MATA+?
MAX6397MATA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6397MATA+ 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+?
For technical support, including MAX6397MATA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6397MATA+ requirements.
6.How does Aetrix verify that MAX6397MATA+ is sourced from the original manufacturer or authorized distributors?
All MAX6397MATA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6397MATA+?
All MAX6397MATA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6397MATA+, 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+ part is unused and in its original packaging.
Return procedure for MAX6397MATA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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