My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6397TATA+T
- Part No.:
- MAX6397TATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6397TATA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,278
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6397TATA+T from Maxim Integrated is an overvoltage protection controller with integrated 5V linear regulator, designed to safeguard downstream circuitry against transients up to 72V input. It controls an external n-channel MOSFET in either disconnect (switch) or voltage-limit (sawtooth clamping) mode, delivers 100mA regulated output, and features 37µA quiescent current - ideal for industrial power rails and wall-cube-powered systems requiring robust transient immunity.
For engineers reviewing the MAX6397TATA+T datasheet, MAX6397TATA+T pinout, MAX6397TATA+T application, or MAX6397TATA+T equivalent, this device offers user-adjustable overvoltage threshold (via SET pin), thermal shutdown, ±5% UVLO hysteresis, and a fixed 5V REG output with open-drain POK - all in a thermally enhanced 3mm × 3mm TDFN-EP package rated from –40°C to +125°C.
Technical Context
The MAX6397TATA+T implements dual-mode overvoltage protection: as a switch (GATE pulled low to disconnect load during overvoltage) or as a limiter (GATE sawtoothing to clamp OUT at user-set threshold). Its internal charge pump delivers ~10V gate-to-source drive above IN or OUT, ensuring low RDS(ON) enhancement of external n-MOSFETs.
It integrates a standalone linear regulator (5.0V ±2.5%, 100mA max) that remains active regardless of SHDN state or MOSFET conduction. The POK output asserts low when REG falls below 92.5% of nominal (4.67V typ), with 35µs response time and <100nA leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5V to 72V - supports wide-input industrial and automotive power rails without external pre-regulation. |
| REG Output Voltage | 5.0V ±2.5% (typ) - factory-trimmed for stable always-on bias supply; 100mA capable with 1.2V dropout at full load. |
| Quiescent Current (REG on) | 37µA - enables ultra-low-power "always-on" monitoring in battery-backed or energy-sensitive systems. |
| Overvoltage Threshold | Adjustable via SET pin (1.215V ref, ±4% tolerance) - sets trip point using resistor divider; 5% hysteresis prevents chatter. |
| GATE Drive Capability | Charge-pump output sourcing 75µA, enhancing GATE to VIN + 10V (min) - ensures full n-MOSFET enhancement even at high VIN. |
| Thermal Shutdown | Activates at +150°C junction temperature with 20°C hysteresis - protects IC and co-located MOSFET under sustained overload. |
| POK Assertion Threshold | 4.67V (92.5% of 5V) - provides precise power-good signaling for microcontroller reset or system sequencing logic. |
Pinout & Package
MAX6397TATA+T is housed in an 8-pin, 3mm × 3mm thermally enhanced TDFN-EP package with exposed pad (EP) tied to GND for optimal heat dissipation. Pin 1 is marked by a dot; EP must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | High-voltage supply input | Bypass with ≥10µF capacitor; withstands up to +80V transient; powers internal circuits and charge pump. |
| 2 SHDN | Active-low shutdown control | Drives GATE low to disable MOSFET; REG remains active; internally pulled down (1µA). |
| 3 SET | Overvoltage threshold reference input | 1.215V precision comparator input; connects to resistor divider from IN or OUT to set trip point. |
| 4 POK | Open-drain power-good output | Asserts low when REG drops below 4.67V; requires external pullup (e.g., 100kΩ to REG). |
| 5 GND | Ground reference | Common return for all analog/digital functions; connects to EP for thermal performance. |
| 6 GATE | n-MOSFET gate driver output | Charge-pump output; drives gate to VIN + 10V (typ); pulls to OUT during fault; sinks 100mA during fast turn-off. |
| 7 OUT | Output voltage sense node | Connects to source of external n-MOSFET; used as feedback point in limiter mode or as pass-through in switch mode. |
| 8 REG | 5V linear regulator output | Fixed 5.0V output; sources up to 100mA; bypass with ≥4.7µF ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| User-configurable overvoltage protection mode | Switch mode (full disconnect) or limiter mode (sawtooth GATE clamping) selected by SET connection topology - preserves system operation during transients. |
| Integrated 5V linear regulator | Always-on, 100mA-capable, 37µA quiescent current - eliminates need for separate bias rail in space-constrained industrial modules. |
| Precision overvoltage threshold | 1.215V ±4% internal reference with 5% hysteresis - enables accurate, stable trip points across –40°C to +125°C. |
| Robust gate drive architecture | Internal charge pump delivering ≥10V gate-to-source swing - ensures low RDS(ON) conduction for high-efficiency power path design. |
| Thermal shutdown with hysteresis | +150°C activation / +130°C recovery - protects both IC and co-packaged MOSFET under sustained overload or poor heatsinking. |
Applications
| Industrial Power Input Protection | Wall-Cube DC Adapter Interface |
|---|---|
|
Use Scenario: Protecting PLC I/O modules from 48VDC bus transients and lightning-induced surges. IC Role / Device Role / Timing Role: Overvoltage controller isolating downstream 24V logic from >72V spikes; REG powers isolated CAN transceiver. Use Value: Prevents field-replaceable module failure during EFT/burst events; 37µA quiescent current avoids loading backup supercapacitors. |
Use Scenario: Securing USB-C PD adapter outputs against miswired or faulty third-party chargers delivering >20V. IC Role / Device Role / Timing Role: Acts as voltage limiter to clamp output at 5.5V while maintaining USB enumeration; POK signals host controller. Use Value: Enables safe hot-plug compatibility without sacrificing USB compliance; sawtooth GATE avoids audible noise in compact enclosures. |
| Notebook System Power Sequencing | FireWire® Bus Power Management |
|
Use Scenario: Managing 19V adapter input to protect embedded controller and DDR memory power rails. IC Role / Device Role / Timing Role: Switch-mode OV protection disables main PMIC during overvoltage; REG supplies always-on RTC and wake logic. Use Value: Eliminates need for discrete TVS + LDO combo; 100ms startup delay prevents brownout during adapter insertion. |
Use Scenario: Regulating and protecting FireWire 1394a port power (12–40V) against cable-induced transients in audio/video equipment. IC Role / Device Role / Timing Role: Limits bus voltage to 12.5V during surge while sustaining link-layer communication via REG-powered PHY. Use Value: Maintains IEEE 1394 link integrity during ESD events; TDFN package fits tight spacing near edge connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection with integrated regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT4363IMS-2#PBF | Higher 100V abs max input; includes reverse-voltage protection; no integrated linear regulator. | Requires external 5V LDO; better suited for 48V telecom where reverse polarity is risk. | Choose LT4363 if reverse-battery protection is mandatory and board space allows separate regulator. |
| TPS26631RGER | Integrated 5V LDO (150mA); lower 60V max input; no POK output; fixed 15.5V OV threshold. | Limited adjustability; lacks thermal shutdown hysteresis; optimized for USB PD sink applications. | Choose TPS26631 if fixed-threshold, higher-current LDO is preferred and thermal margin is well-controlled. |
Compared with LT4363IMS-2#PBF and TPS26631RGER, MAX6397TATA+T uniquely combines adjustable overvoltage threshold, integrated 5V/100mA regulator with POK, and thermal hysteresis - making it optimal for space-constrained industrial designs requiring flexible fault response and always-on bias.
Availability
MAX6397TATA+T is available at Aetrix Electronics and suitable for industrial power input protection, wall-cube DC adapter interface, and notebook system power sequencing requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6397TATA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6397 series belongs to Maxim's high-voltage protection controller product line, engineered specifically for ruggedized power-path supervision in harsh environments - emphasizing transient resilience, thermal robustness, and minimal external component count.
FAQ
What is the exact output voltage tolerance and load regulation of the MAX6397TATA+T's integrated regulator?
The MAX6397TATA+T delivers a factory-trimmed 5.0V output with ±2.5% initial accuracy (4.875V to 5.125V) and maintains ±1.5% regulation across 1mA–100mA load current at +25°C. Load regulation is specified as 0.8mV/mA, meaning output shifts ≤80mV from no-load to full 100mA load - critical for powering precision analog circuitry without additional post-regulation.
Can the MAX6397TATA+T operate in overvoltage-limiter mode with a 24V input and 12V output requirement?
Yes - the MAX6397TATA+T supports overvoltage-limiter mode by connecting the SET pin to a resistor divider from OUT. For a 12V clamp, configure R1/R2 to present 1.215V at SET when OUT = 12V (e.g., R2 = 121kΩ, R1 = 1.08MΩ). GATE will then sawtooth to regulate OUT at 12V even with 24V at IN, provided the external MOSFET's VGS(max) and power dissipation are within rating.
Does the MAX6397TATA+T's POK output remain functional when SHDN is asserted low?
Yes - the POK output remains fully operational and responsive to REG voltage changes even when SHDN is driven low. Since the linear regulator stays enabled independent of SHDN state, POK continues asserting low if REG drops below 4.67V, enabling reliable system reset or fault logging during controlled shutdown sequences involving the main power path.
What is the maximum continuous current the MAX6397TATA+T can sustain through its REG output without thermal derating?
The MAX6397TATA+T's REG output is rated for continuous 100mA load at +70°C ambient, with thermal derating beginning above that temperature (18.2mW/°C). At full 100mA and VIN = 14V, typical junction temperature rise is <30°C above ambient in a standard 2-layer PCB with EP grounded - allowing reliable 100mA operation up to +95°C ambient before reaching the +125°C max operating limit.
How does the MAX6397TATA+T's GATE output behave during startup and after thermal shutdown recovery?
At power-up, GATE remains low until VIN exceeds the 5.0V UVLO threshold, SHDN is high, and no overvoltage fault exists - then GATE rises to VIN + 10V with ~1ms rise time. After thermal shutdown recovery (junction cools by 20°C), GATE re-enables with the same 100µs delay, but only if UVLO and fault conditions remain cleared - preventing premature re-engagement during thermal instability.
MAX6397TATA+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:
- 3.053V
- 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)
MAX6397TATA+T FAQ
1.How can I place an order for MAX6397TATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6397TATA+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 MAX6397TATA+T reliable?
The price and inventory of MAX6397TATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6397TATA+T is usually 5 days.
3.What payment methods are accepted for MAX6397TATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6397TATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6397TATA+T?
MAX6397TATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6397TATA+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 MAX6397TATA+T?
For technical support, including MAX6397TATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6397TATA+T requirements.
6.How does Aetrix verify that MAX6397TATA+T is sourced from the original manufacturer or authorized distributors?
All MAX6397TATA+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 MAX6397TATA+T meets industry standards.
7.What is the process for return or replacement of MAX6397TATA+T?
All MAX6397TATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6397TATA+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 MAX6397TATA+T part is unused and in its original packaging.
Return procedure for MAX6397TATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6397TATA+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
