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Analog Devices Inc./Maxim Integrated MAX6497ATA+T
- Part No.:
- MAX6497ATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Mixed Technology
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6497ATA+T.pdf
- Description:
- TVS DEVICE MIXED 8-TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,400
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Product details
Overview
The MAX6497ATA+T from Maxim Integrated is an overvoltage-protection switch controller that monitors input voltage and drives an external nMOSFET to isolate the load during overvoltage events. It operates from +5.5V to +72V, features a 0.505V adjustable overvoltage threshold (OVSET), includes an open-drain POK output with 1.24V threshold (POKSET), latches off the MOSFET until power or SHDN is cycled, and is qualified for automotive-grade operation from -40°C to +125°C.
For engineers reviewing the MAX6497ATA+T datasheet, MAX6497ATA+T pinout, MAX6497ATA+T application, or MAX6497ATA+T equivalent, this device is selected for high-reliability 12V/24V automotive power rail protection where latch-on-fault behavior, precise overvoltage trip control, and integrated POK signaling are required.
Technical Context
The MAX6497ATA+T implements a fast comparator-based overvoltage detection path with sub-μs response (0.6μs OVSET-to-GATE delay) and uses an internal charge pump to deliver 10V gate enhancement above IN for low RDS(ON) nMOSFET drive. Its GATE output sinks 100mA during fault conditions and clamps to OUTFB at ≤18V to protect the external FET.
It integrates a dedicated open-drain POK comparator with 1.24V rising threshold and 5% hysteresis on POKSET, enabling system-level power-good monitoring. The latch function holds GATE off indefinitely after overvoltage detection until IN drops below UVLO (5.0V) or SHDN is toggled - no auto-retry occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +5.5V to +72V - supports full automotive battery range including load-dump transients up to 72V. |
| OVSET Threshold | 0.494V to 0.518V (rising) - enables precise overvoltage trip setting via external resistor divider. |
| POKSET Threshold | 1.22V to 1.26V (rising) - defines undervoltage detection point for POK output assertion. |
| GATE Drive Capability | 100mA sink current - ensures rapid turn-off of large nMOSFETs during overvoltage faults. |
| Propagation Delay | 0.6μs (OVSET to GATE) - enables protection against fast-rising transients such as ISO 7637-2 Pulse 5a. |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive environments. |
| Shutdown Current | 15µA to 24µA - minimizes quiescent drain in always-on vehicle modules. |
Pinout & Package
MAX6497ATA+T is housed in a thermally enhanced 3mm × 3mm, 8-pin TDFN-EP package (package code T833+2) with exposed pad connected to GND for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Positive supply input | Connects to high-voltage input rail; bypassed with 10µF capacitor to GND for stability. |
| 2 SHDN | Active-low shutdown control | Pulling low forces GATE low and resets latch when toggled high again. |
| 3 OVSET | Overvoltage threshold adjust input | Accepts resistive divider to set trip point at 0.505V; 50nA max bias current enables high-impedance design. |
| 4 GND | Ground reference | Primary signal and power return; EP (exposed pad) is internally tied to GND. |
| 5 GATE | nMOSFET gate driver output | Charge-pump-driven output sinking 100mA; clamps to OUTFB during fault within 0.5μs. |
| 6 OUTFB | Output voltage sense feedback | Connected to nMOSFET source; used for POK monitoring and overvoltage limiting loop. |
| 7 POK | Open-drain Power-OK indicator | Asserts low when POKSET < 1.18V; requires external pullup for system reset or sequencing logic. |
| 8 POKSET | Power-OK threshold adjust input | Resistive divider node defining POK activation point; 1.24V rising threshold with 5% hysteresis. |
Key Features
| Feature | Design Value |
|---|---|
| Latched overvoltage shutdown | Prevents automatic recovery after fault - ensures system remains protected until explicit reset via SHDN toggle or IN power cycle. |
| Dedicated POK comparator | Enables independent power-good monitoring without requiring microcontroller ADC or GPIO polling. |
| Integrated 10V charge-pump gate driver | Ensures full enhancement of low-RDS(ON) nMOSFETs across full input range, minimizing conduction loss. |
| Fast 0.6μs OVSET-to-GATE propagation | Meets stringent timing requirements for automotive load-dump protection per ISO 7637-2. |
| Thermal shutdown with 20°C hysteresis | Protects both IC and external MOSFET by disabling GATE at +160°C junction temperature. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Rail |
|---|---|
Use Scenario: Protecting 12V/24V supply to microcontroller, CAN transceivers, and sensor interfaces in BCMs subjected to alternator load-dump transients. IC Role / Device Role / Timing Role: Overvoltage switch controller that isolates downstream circuitry within 0.6μs of fault detection and holds isolation until manual reset. Use Value: Prevents catastrophic failure of sensitive electronics during ISO 7637-2 Pulse 5a events while eliminating need for bulky TVS diodes. | Use Scenario: Securing programmable logic controller field I/O power rails exposed to industrial 24V DC supply surges and polarity reversals. IC Role / Device Role / Timing Role: Latching overvoltage protector with POK output used to disable I/O drivers and trigger system fault logging. Use Value: Enables deterministic fault containment and diagnostics in safety-critical automation systems without software intervention. |
| Telematics Control Unit (TCU) | FireWire® Interface Power Management |
Use Scenario: Guarding LTE modem, GNSS receiver, and eSIM power domains in vehicle telematics units operating continuously on battery backup. IC Role / Device Role / Timing Role: High-voltage supervisor with latch-on-fault and POK signaling to coordinate safe power-down sequence during overvoltage events. Use Value: Ensures data integrity and prevents corruption during unexpected battery disconnect or alternator regulation failure. | Use Scenario: Regulating 12V FireWire bus power in notebook docking stations where hot-plug transients and ESD must be contained. IC Role / Device Role / Timing Role: Overvoltage limiter controller driving external nMOSFET to clamp output voltage during transient excursions. Use Value: Maintains functional FireWire link during brief overvoltage events without interrupting data transfer or requiring host reenumeration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage-protection switch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6498ATA+T | Auto-retry functionality instead of latch; POK identical; same OVSET/POKSET thresholds and pinout. | Used where automatic recovery after transient overvoltage is acceptable (e.g., infotainment USB ports). | Select MAX6498ATA+T only if system design permits autonomous re-enabling after fault clearance without host intervention. |
| TPD2S701QDQARQ1 | Integrated dual-channel TVS + overvoltage detector; no external MOSFET drive; fixed 28V trip; no POK output. | Suitable for lower-energy transients where discrete FET control is unnecessary and board space is constrained. | Choose TPD2S701QDQARQ1 when protection level is limited to ISO 10605/IEC 61000-4-2 and no active switching or POK signaling is needed. |
Compared with MAX6498ATA+T, the MAX6497ATA+T provides deterministic fault containment via latch behavior, critical for safety-critical subsystems; compared with TPD2S701QDQARQ1, it delivers programmable overvoltage thresholds, active MOSFET control, and POK status reporting - essential for high-integrity power management.
Availability
MAX6497ATA+T is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O power rails, telematics control units, and FireWire® interface power management requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX6497ATA+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 automotive, industrial, and communications applications.
The MAX6495–MAX6499 product line delivers high-voltage overvoltage-protection controllers with external MOSFET drive, targeting robust power rail supervision in harsh environments like automotive engine compartments and industrial control cabinets.
FAQ
What is the overvoltage trip threshold accuracy of the MAX6497ATA+T?
The MAX6497ATA+T has an OVSET rising threshold of 0.494V to 0.518V (±2.2% typical) with 0.13V falling threshold, enabling precise overvoltage detection. This specification is guaranteed over -40°C to +125°C and allows accurate setting of trip points using standard resistor dividers referenced to OUTFB or IN.
How does the latch function work in the MAX6497ATA+T after an overvoltage event?
After an overvoltage condition triggers, the MAX6497ATA+T latches GATE off permanently until either the IN supply drops below the UVLO threshold (~5.0V) or the SHDN pin is pulsed low then high. This behavior prevents unintended reconnection during unstable input conditions and ensures deliberate system-level recovery.
Can the MAX6497ATA+T drive a pMOSFET for reverse-battery protection?
No. The MAX6497ATA+T lacks the GATEP output required for pMOSFET biasing. That function is exclusive to the MAX6496 variant. The MAX6497ATA+T supports only nMOSFET-based overvoltage switching and includes POK/POKSET functionality not present in MAX6496.
What is the maximum output capacitance supported by the MAX6497ATA+T during overvoltage shutdown?
The MAX6497ATA+T's internal 100mA GATE pulldown limits safe output capacitance based on overvoltage threshold and energy dissipation. For a 28V overvoltage limit, Figure 4 in the datasheet specifies ≤100µF total capacitance on OUTFB. Exceeding this risks thermal damage during fast fault clearing.
Does the MAX6497ATA+T include thermal shutdown protection?
Yes. The MAX6497ATA+T incorporates thermal shutdown that disables GATE when junction temperature exceeds +160°C, with 20°C hysteresis. Effective operation requires close thermal coupling between the IC and the external nMOSFET - placing them on the same thermal island improves fault detection accuracy.
MAX6497ATA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-WDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Clamping:
- -
- Technology:
- Mixed Technology
- Number of Circuits:
- 1
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX6497ATA+T FAQ
1.How can I place an order for MAX6497ATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6497ATA+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 MAX6497ATA+T reliable?
The price and inventory of MAX6497ATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6497ATA+T is usually 5 days.
3.What payment methods are accepted for MAX6497ATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6497ATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6497ATA+T?
MAX6497ATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6497ATA+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 MAX6497ATA+T?
For technical support, including MAX6497ATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6497ATA+T requirements.
6.How does Aetrix verify that MAX6497ATA+T is sourced from the original manufacturer or authorized distributors?
All MAX6497ATA+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 MAX6497ATA+T meets industry standards.
7.What is the process for return or replacement of MAX6497ATA+T?
All MAX6497ATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6497ATA+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 MAX6497ATA+T part is unused and in its original packaging.
Return procedure for MAX6497ATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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