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Analog Devices Inc./Maxim Integrated MAX6397YATA+
- Part No.:
- MAX6397YATA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6397YATA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:581
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Product details
Overview
MAX6397YATA+ from Maxim Integrated is a high-voltage overvoltage protection controller with integrated 2.5V linear regulator and open-drain POK output. It monitors input/output voltage via the SET pin, controls an external n-channel MOSFET through its GATE driver (10V gate-to-source enhancement), and delivers up to 100mA regulated output while consuming only 37µA quiescent current. It operates across 5.5V–72V input and is used in industrial power rails exposed to transients.
For engineers reviewing the MAX6397YATA+ datasheet, MAX6397YATA+ pinout, MAX6397YATA+ application, or MAX6397YATA+ equivalent, this page provides verified functional identity, confirmed 8-pin TDFN-EP package mapping, validated GATE/SET/REG/POK signal roles, thermal shutdown behavior at +150°C, and real-world overvoltage-limit vs. disconnect mode trade-offs.
Technical Context
The MAX6397YATA+ integrates two independent functional blocks: an adjustable overvoltage protection controller (SET threshold = 1.215V ±0.034V, 5% hysteresis) and a fixed 2.5V linear regulator (±2% accuracy, 100mA max output). Its GATE output uses an internal charge pump to deliver ≥10V above IN (for VIN ≥14V) to fully enhance external n-channel MOSFETs, minimizing RDS(ON) conduction loss.
In overvoltage-switch mode, GATE pulls low within 0.75µs of SET crossing threshold, disconnecting load; in overvoltage-limit mode, GATE sawtooths to clamp VOUT at user-set threshold - both modes use the same SET comparator and charge-pump architecture. Thermal shutdown disables GATE and REG simultaneously at +150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5V to 72V - supports wide-input industrial DC rails including 24V, 48V, and 60V systems without external step-down. |
| Regulator Output Voltage | 2.5V ±2% - factory-trimmed for MAX6397Y variant; enables direct powering of 2.5V logic, sensors, or supervisory circuits. |
| Quiescent Current (REG ON) | 37µA - allows always-on operation in battery-backed or energy-sensitive applications without significant standby drain. |
| Overvoltage Threshold Accuracy | SET = 1.215V ±0.034V - enables precise, resistor-divider–based overvoltage setting (e.g., 20V ±0.6V with 5% resistor tolerance). |
| GATE Drive Capability | 10V above IN (typ), 75µA sourcing - ensures full enhancement of low-RDS(ON) n-channel MOSFETs even at high input voltages. |
| Power-Good Threshold | VPOK_TH = 2.125V to 2.250V (92.5% of 2.5V nominal) - asserts POK low when regulator output drops below valid operating range. |
| Operating Temperature | –40°C to +125°C (TJ) - fully specified for under-hood, factory-floor, and other harsh-environment deployments. |
Pinout & Package
MAX6397YATA+ is housed in an 8-pin, 3mm × 3mm thermally enhanced TDFN-EP package with exposed pad (EP) that must be soldered to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | High-voltage supply input | Bypass with ≥10µF capacitor; withstands up to +80V transient; powers internal circuitry and charge pump. |
| 2 SHDN | Active-low shutdown control | Drives GATE low to disable external MOSFET; REG remains active; internally pulled down (1µA). |
| 3 SET | Overvoltage threshold reference input | 1.215V comparator threshold; connects to resistor divider from IN or OUT to set trip point (e.g., 20V, 30V). |
| 4 POK | Open-drain power-good output | Asserts low when REG falls below 92.5% of 2.5V; requires external pullup (e.g., 100kΩ to REG). |
| 5 GND | Analog/digital ground reference | Common return for all signals; EP must connect to same GND plane for thermal performance. |
| 6 GATE | Charge-pump–driven MOSFET gate driver | Sources 75µA to drive external n-FET gate; clamped to ≤18V above OUT to prevent FET gate oxide damage. |
| 7 OUT | Output voltage sense node | Connects to source of external n-FET; used as feedback point in overvoltage-limiter configuration. |
| 8 REG | Fixed 2.5V linear regulator output | Delivers up to 100mA; bypass with ≥4.7µF ceramic capacitor; independent of SHDN state. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable overvoltage protection | User-configurable trip point via resistor divider on SET pin - supports both switch-off and voltage-limit modes. |
| Integrated 2.5V linear regulator | Always-on, 100mA-capable LDO with 37µA quiescent current - eliminates need for separate bias rail in space-constrained designs. |
| Charge-pump–enhanced GATE drive | Delivers ≥10V gate-to-source voltage across full 5.5V–72V input range - ensures low RDS(ON) conduction for high-efficiency power path. |
| Thermal shutdown with hysteresis | Disables GATE and REG at +150°C junction temperature; re-enables after 20°C cooldown - protects IC and external MOSFET during overload. |
| Robust absolute maximum ratings | IN withstands –0.3V to +80V; GATE-to-OUT clamp at 13–18V - enables reliable operation in noisy industrial environments. |
Applications
| Industrial Power Input Protection | FireWire® Bus Power Management |
|---|---|
Use Scenario: 24V/48V DC input rail in PLC I/O modules subjected to lightning-induced surges and load-dump transients. IC Role / Device Role / Timing Role: Overvoltage protection controller and local 2.5V bias generator - monitors input via SET divider, drives external MOSFET to disconnect or limit load, supplies FPGA configuration logic. Use Value: Prevents downstream damage during >60V transients while maintaining 2.5V logic power during fault events via limiter mode. |
Use Scenario: FireWire® (IEEE 1394) port power delivery where hot-plug insertion may cause voltage overshoot on +12V bus. IC Role / Device Role / Timing Role: Fast-response overvoltage limiter - senses VOUT via SET, cycles GATE in sawtooth to clamp bus at 13.2V, sustains communication during transient. Use Value: Enables uninterrupted data transfer during 100ns–1µs transients by limiting rather than disconnecting power - avoids bus reset. |
| Notebook Adapter Input Conditioning | Wall-Cube Power Device Protection |
Use Scenario: AC/DC wall adapter output feeding notebook mainboard; subject to line surges and poor regulation. IC Role / Device Role / Timing Role: Input overvoltage switch - monitors IN via SET, forces GATE low within 0.75µs to isolate system when >20V detected. Use Value: Protects sensitive CPU/GPU VRMs and memory from sustained overvoltage without relying on slow system-level shutdown. |
Use Scenario: Low-cost wall-cube power supply for IoT sensor hubs; lacks built-in surge suppression. IC Role / Device Role / Timing Role: Dual-function protector - provides 2.5V always-on rail for RTC/microcontroller sleep mode while guarding against >30V input spikes. Use Value: Integrates protection and bias generation in single 3mm×3mm footprint - reduces BOM count and PCB area vs. discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection and bias generation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6397TATA+ | Fixed 3.3V regulator output; identical protection functionality, pinout, and thermal specs. | Used where 3.3V logic bias is required instead of 2.5V - no change to protection circuit design. | Select MAX6397TATA+ when system MCU/FPGA I/O banks operate at 3.3V and require matching regulator voltage. |
| TPS26631RGER | Integrated 60V eFuse with 2.5V LDO; no adjustable overvoltage threshold - fixed 20.5V OVP; no POK output. | Provides current limiting and short-circuit protection but lacks configurable overvoltage clamp or limiter mode. | Choose TPS26631RGER for simpler, fixed-threshold 20.5V protection with built-in current limiting - not suitable for custom threshold or limiter-mode designs. |
Compared with MAX6397YATA+, MAX6397TATA+ offers identical protection architecture with only regulator voltage changed, enabling drop-in replacement where 3.3V bias is needed; TPS26631RGER trades configurability and limiter capability for integrated current limiting and smaller solution size, but cannot replicate adjustable overvoltage response or POK signaling.
Availability
MAX6397YATA+ is available at Aetrix Electronics and suitable for industrial automation, FireWire® interface power management, and wall-cube power device protection requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for MAX6397YATA+ 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 family delivers high-voltage overvoltage protection with integrated bias regulation - engineered specifically for industrial power inputs, portable equipment adapters, and systems needing robust transient survival without sacrificing compactness or efficiency.
FAQ
What is the exact regulator output voltage of the MAX6397YATA+?
The MAX6397YATA+ features a factory-trimmed 2.5V linear regulator with ±2% initial accuracy over temperature and load. At 1mA load and +25°C, output is guaranteed between 2.45V and 2.55V; full-range specification (–40°C to +125°C, 1mA–100mA) ensures 2.41V to 2.55V. This matches the "Y" suffix in the ordering code per Maxim's Selector Guide.
How does the MAX6397YATA+ behave during an overvoltage event - does it disconnect or limit?
The MAX6397YATA+ supports both modes: when SET is tied to IN, it acts as an overvoltage switch (GATE forced low to disconnect load); when SET is tied to OUT, it operates as a voltage limiter (GATE sawtooths to clamp VOUT). The mode is determined solely by external resistor connections - no internal configuration is required.
Can the MAX6397YATA+ drive a high-side n-channel MOSFET directly?
Yes - the MAX6397YATA+ integrates a charge pump that delivers ≥10V gate-to-source drive relative to IN (for VIN ≥14V), enabling full enhancement of standard n-channel MOSFETs in high-side configuration. GATE is clamped to ≤18V above OUT to prevent gate oxide overstress, making it safe for typical 20V-rated FETs.
What is the purpose of the POK pin on the MAX6397YATA+?
The POK (power-good) pin on the MAX6397YATA+ is an open-drain output that asserts low when the 2.5V REG output falls below 92.5% of nominal (i.e., <2.3125V). It provides system-level monitoring of regulator health and can be used to hold microcontroller reset or disable downstream circuitry during undervoltage conditions.
Does the MAX6397YATA+ remain functional during thermal shutdown?
No - during thermal shutdown, the MAX6397YATA+ disables both the GATE output and the REG linear regulator output until junction temperature cools by 20°C. This dual shutdown prevents thermal runaway in the IC and external MOSFET, and ensures safe recovery before resuming operation. The shutdown threshold is +150°C with hysteresis.
MAX6397YATA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.188V
- 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)
MAX6397YATA+ FAQ
1.How can I place an order for MAX6397YATA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6397YATA+ 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 MAX6397YATA+ reliable?
The price and inventory of MAX6397YATA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6397YATA+ is usually 5 days.
3.What payment methods are accepted for MAX6397YATA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6397YATA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6397YATA+?
MAX6397YATA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6397YATA+ 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 MAX6397YATA+?
For technical support, including MAX6397YATA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6397YATA+ requirements.
6.How does Aetrix verify that MAX6397YATA+ is sourced from the original manufacturer or authorized distributors?
All MAX6397YATA+ 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 MAX6397YATA+ meets industry standards.
7.What is the process for return or replacement of MAX6397YATA+?
All MAX6397YATA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6397YATA+, 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 MAX6397YATA+ part is unused and in its original packaging.
Return procedure for MAX6397YATA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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