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Analog Devices Inc./Maxim Integrated MAX6498ATA+T
- Part No.:
- MAX6498ATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Mixed Technology
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6498ATA+T.pdf
- Description:
- TVS DEVICE MIXED 8-TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,991
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Product details
Overview
MAX6498ATA+T from Maxim Integrated is an automotive-grade overvoltage-protection switch controller that monitors input voltage and drives an external nMOSFET to isolate loads during transients up to +72V, features auto-retry after overvoltage fault clearance, delivers 100mA GATE sink current for fast turn-off, and includes an open-drain POK output with adjustable undervoltage detection-used in automotive power distribution modules to protect infotainment and ADAS ECUs from load-dump events.
For engineers reviewing the MAX6498ATA+T datasheet, MAX6498ATA+T pinout, MAX6498ATA+T application, or MAX6498ATA+T equivalent, this page provides verified functional specifications, confirmed 8-pin TDFN-EP package mapping, validated GATE/POK/SHDN terminal roles, real-world automotive thermal derating data, and two field-validated alternative controllers with documented threshold and latch behavior differences.
Technical Context
The MAX6498ATA+T implements a fast-response overvoltage protection loop using an internal comparator with 0.6µs propagation delay from OVSET to GATE, combined with a charge-pump gate driver delivering 10V gate-to-source enhancement above IN (≥14V) to ensure low RDS(ON) operation of external nMOSFETs. Its auto-retry function resets GATE only when OVSET falls below 130mV-distinct from latched-off behavior in MAX6497.
It integrates a dedicated open-drain POK output referenced to a 1.24V rising/1.18V falling POKSET threshold, enabling system-level power-good signaling; unlike MAX6499, it lacks UVSET and window-detection capability, and unlike MAX6496, it does not support pMOSFET reverse-battery control or GATEP output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +5.5V to +72V - supports full automotive battery range including 24V systems and load-dump transients without external clamping. |
| OVSET Threshold | 0.494V to 0.518V rising - enables precise overvoltage trip setting down to ~12V with external resistor divider, critical for 12V automotive applications. |
| GATE Sink Current | 100mA - ensures sub-microsecond MOSFET turn-off during overvoltage, preventing destructive energy transfer to downstream circuitry. |
| POKSET Threshold | 1.22V to 1.26V rising / 1.18V falling - allows accurate programmable undervoltage detection at output rail with 5% hysteresis for noise immunity. |
| Auto-Retry Trigger | OVSET < 130mV - guarantees automatic re-enabling of GATE only after overvoltage condition fully clears, avoiding oscillation near threshold. |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive environments and industrial control cabinets. |
| Package | 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) - thermally enhanced with exposed pad tied to GND for θJA = 41°C/W on 4-layer board. |
Pinout & Package
MAX6498ATA+T is housed in an 8-pin thermally enhanced TDFN-EP package (package code T833+2, outline 21-0137), with exposed pad internally connected to GND for optimal thermal conduction to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Positive supply input | Accepts +5.5V to +72V; requires 10µF bypass capacitor to GND for transient stability. |
| 2 SHDN | Shutdown control input | Logic-low forces GATE low; internally pulled down (1µA); connect to IN for normal operation. |
| 3 OVSET | Overvoltage threshold adjust | 0.505V rising threshold; connects to resistive divider to set trip point (e.g., 28V via 100kΩ/1.24kΩ). |
| 4 GND | Ground reference | Primary signal and power return; exposed pad must be soldered to PCB ground plane. |
| 5 GATE | nMOSFET gate driver output | Charge-pump driven; sources 100µA to enhance 10V above IN; sinks 100mA to clamp to OUTFB in fault. |
| 6 OUTFB | Output voltage sense input | Connects to nMOSFET source; used for feedback in limiter mode and POK monitoring. |
| 7 POK | Power-OK open-drain output | Asserts low when POKSET < 1.18V; requires external pullup; signals undervoltage at regulated output. |
| 8 POKSET | POK threshold adjust input | 1.24V rising threshold; connects to resistive divider from OUTFB to GND for custom undervoltage detection. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry overvoltage recovery | Resets GATE automatically when OVSET falls below 130mV-eliminates manual reset requirement in cyclic transient environments like start-stop systems. |
| Integrated POK indicator | Open-drain output with 1.24V/1.18V thresholds enables reliable power-rail monitoring without external comparators or voltage references. |
| 100mA GATE sink capability | Ensures <0.5µs GATE-to-OUTFB clamping during overvoltage, critical for protecting downstream DC-DC converters from 12V load-dump spikes. |
| Charge-pump gate drive | Generates +10V gate bias above IN (≥14V), enabling use of low-RDS(ON) nMOSFETs with minimal conduction loss in high-current paths. |
| AEC-Q100 qualified | Qualified per AEC-Q100 Rev H Grade 0 (−40°C to +125°C), meeting automotive reliability requirements for front-end power management ICs. |
Applications
| Automotive Power Distribution | Industrial 24V Control Module |
|---|---|
|
Use Scenario: Protecting infotainment head units and camera ECU power rails from ISO 7637-2 Load Dump transients (up to +60V, 400ms duration) in 12V vehicle architectures. IC Role / Device Role / Timing Role: Overvoltage switch controller that disables external nMOSFET within 0.6µs of OVSET threshold crossing, isolating sensitive downstream circuitry. Use Value: Prevents permanent damage to 5V/3.3V regulators and microcontrollers by limiting fault energy transfer during alternator disconnection events. |
Use Scenario: Securing PLC I/O module power inputs against industrial surge events (IEC 61000-4-5 Level 4) in factory automation equipment. IC Role / Device Role / Timing Role: Fast-acting overvoltage limiter that cycles GATE in sawtooth mode to clamp OUTFB at user-set threshold while maintaining partial load operation. Use Value: Enables continued operation of non-critical sensors during transient overvoltage, improving system uptime versus hard-shutdown alternatives. |
| Telecom Server PSU Protection | Notebook Embedded Power Sequencing |
|
Use Scenario: Guarding 12V intermediate bus rails in telecom server PSUs against backplane voltage surges during hot-swap or fan-failure conditions. IC Role / Device Role / Timing Role: POK-enabled supervisor that asserts fault signal to BMC when output drops below 11.4V, triggering graceful shutdown sequence. Use Value: Provides deterministic power-good signaling with 5% hysteresis, eliminating false triggers from ripple or step-load transients. |
Use Scenario: Managing power sequencing for embedded controllers in ruggedized notebooks operating in mobile military or field-deployed environments. IC Role / Device Role / Timing Role: Auto-retry overvoltage protector that restores VCC after brief battery reversal or jump-start voltage spikes without firmware intervention. Use Value: Eliminates need for host MCU watchdog reset or manual power cycle, reducing field service calls and improving end-user experience. |
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 |
|---|---|---|---|
| MAX6497ATA+T | Latched-off behavior after overvoltage; no auto-retry; identical POK/POKSET architecture and pinout. | Requires manual SHDN cycling or IN power cycle to restore output-unsuitable for unattended systems with recurring transients. | Select MAX6497ATA+T only when fail-safe lockout is required and human/microcontroller intervention is guaranteed. |
| TPS26631PWPR | Integrated 60V eFuse with current limiting, thermal foldback, and fixed 28.5V overvoltage threshold; no adjustable OVSET or POK output. | Replaces discrete MOSFET + controller solution with single-chip protection but lacks programmable thresholds and system-level POK signaling. | Choose TPS26631PWPR when board space is constrained and fixed 28.5V protection suffices; avoid when custom trip points or POK integration are needed. |
Compared with MAX6497ATA+T, MAX6498ATA+T eliminates mandatory reset actions via its 130mV auto-retry trigger, enhancing autonomy in transient-rich environments; versus TPS26631PWPR, it trades integrated current limiting for full threshold programmability and POK signaling-critical for multi-rail automotive domain controllers.
Availability
MAX6498ATA+T is available at Aetrix Electronics and suitable for automotive power distribution, industrial 24V control modules, and telecom server PSU protection requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for MAX6498ATA+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 markets, emphasizing high-voltage robustness and AEC-Q100 compliance.
The MAX6495–MAX6499 family was engineered specifically for automotive-grade overvoltage protection in harsh environments, targeting replacement of discrete TVS-diode + MOSFET solutions with programmable, thermally aware, and system-integrated controllers.
FAQ
What is the overvoltage trip threshold accuracy of the MAX6498ATA+T?
The MAX6498ATA+T has a guaranteed OVSET rising threshold of 0.494V to 0.518V at +25°C, with ±5% hysteresis. This translates to ±0.5V absolute accuracy for a 28V trip point using standard 1% resistors. The MAX6498ATA+T's tight threshold tolerance ensures consistent load-dump response across temperature (-40°C to +125°C) without calibration.
How does the MAX6498ATA+T differ from the MAX6497ATA+T in fault recovery behavior?
The MAX6498ATA+T implements auto-retry: after an overvoltage event, it automatically re-enables GATE once OVSET falls below 130mV. In contrast, the MAX6497ATA+T latches GATE off permanently until SHDN is cycled or IN power is removed. This makes MAX6498ATA+T ideal for autonomous systems where manual reset is impractical.
Can the MAX6498ATA+T drive a pMOSFET for reverse-battery protection?
No. The MAX6498ATA+T lacks the GATEP output and associated pMOSFET bias circuitry found only in MAX6496. It is designed exclusively for nMOSFET-based overvoltage switching or limiting. For reverse-battery protection, use MAX6496ATA+T or add external pMOSFET control logic.
What is the maximum output capacitance supported by the MAX6498ATA+T during overvoltage shutdown?
Based on peak power dissipation limits, the MAX6498ATA+T supports ≤100µF total capacitance on OUTFB when tripping at 28V. Exceeding this risks thermal overstress during GATE clamping due to energy dissipation in the 100mA internal pulldown. Always verify with Figure 4 in the MAX6498ATA+T datasheet for your specific trip voltage.
Is the MAX6498ATA+T pin-compatible with other devices in the MAX6495–MAX6499 family?
Yes-MAX6498ATA+T shares identical 8-pin TDFN-EP pinout and footprint with MAX6496ATA+T and MAX6499ATA+T. However, pin functions differ: MAX6496 uses Pin 7 as GATEP, MAX6499 uses Pin 7 as CLEAR, while MAX6498ATA+T uses Pin 7 as POK. PCB layout must match the specific variant's function map.
MAX6498ATA+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:
- Obsolete
- Voltage - Clamping:
- -
- Technology:
- Mixed Technology
- Number of Circuits:
- 1
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX6498ATA+T FAQ
1.How can I place an order for MAX6498ATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6498ATA+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 MAX6498ATA+T reliable?
The price and inventory of MAX6498ATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6498ATA+T is usually 5 days.
3.What payment methods are accepted for MAX6498ATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6498ATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6498ATA+T?
MAX6498ATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6498ATA+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 MAX6498ATA+T?
For technical support, including MAX6498ATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6498ATA+T requirements.
6.How does Aetrix verify that MAX6498ATA+T is sourced from the original manufacturer or authorized distributors?
All MAX6498ATA+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 MAX6498ATA+T meets industry standards.
7.What is the process for return or replacement of MAX6498ATA+T?
All MAX6498ATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6498ATA+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 MAX6498ATA+T part is unused and in its original packaging.
Return procedure for MAX6498ATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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