My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6397SATA+T
- Part No.:
- MAX6397SATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6397SATA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:857
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6397SATA+T from Maxim Integrated is an overvoltage protection controller with integrated 3.3V/100mA linear regulator, designed to safeguard downstream loads against transients up to 72V input. It controls an external n-channel MOSFET in either disconnect (switch) or voltage-limit (sawtooth GATE) mode, features adjustable overvoltage threshold via SET pin, internal charge-pump gate drive (VIN + 9.2V typical), and operates from -40°C to +125°C in industrial power rails.
For engineers reviewing the MAX6397SATA+T datasheet, MAX6397SATA+T pinout, MAX6397SATA+T application, or MAX6397SATA+T equivalent, this device is selected for high-reliability 3.3V always-on subsystems requiring transient-hardened input protection, precise overvoltage threshold setting, thermal shutdown coordination with external FET, and minimal quiescent current (37µA) in shutdown mode.
Technical Context
The MAX6397SATA+T implements dual-mode overvoltage control: as a switch (GATE pulled low to OUT during fault) or limiter (GATE sawtoothing to clamp VOUT at user-set threshold). Its SET pin monitors voltage via resistor divider with 1.215V ±0.034V threshold and 4% hysteresis, enabling precise OV trip points from 5.5V to 72V input range.
It integrates a standalone linear regulator delivering fixed 3.3V (±2.5% over load/temperature), 100mA output, 37µA quiescent current, and open-drain POK with 92.5% or 87.5% assertion threshold. Thermal shutdown activates at +150°C with 20°C hysteresis and disables both REG and GATE outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5V to 72V - supports wide-input industrial and wall-cube supplies without external pre-regulation. |
| REG Output Voltage | 3.3V ±2.5% - factory-trimmed for stable 3.3V always-on biasing of microcontrollers or sensors. |
| REG Max Output Current | 100mA - sufficient to power low-power logic, RTCs, or supervisory circuits continuously. |
| Quiescent Current (SHDN = GND) | 37µA - enables ultra-low standby power in battery-backed or energy-sensitive systems. |
| Overvoltage Threshold Accuracy | SET = 1.215V ±0.034V - allows accurate, temperature-stable OV trip point setting across -40°C to +125°C. |
| GATE Drive Voltage | VIN + 9.2V (typ) - ensures full enhancement of low-RDS(ON) n-channel MOSFETs even at low VIN. |
| Thermal Shutdown Threshold | +150°C with 20°C hysteresis - protects IC and co-located MOSFET from thermal runaway during sustained overvoltage events. |
Pinout & Package
MAX6397SATA+T is housed in an 8-pin, 3mm × 3mm thermally enhanced TDFN-EP package with exposed pad (EP) connected to GND for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | High-voltage supply input | Bypassed 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 to GND. |
| 3 SET | Overvoltage threshold reference input | Accepts resistor-divider from IN or OUT; 1.215V threshold sets precise OV trip point; 50nA bias enables high-impedance dividers. |
| 4 POK | Open-drain power-good output | Asserts low when REG drops below 92.5% or 87.5% of 3.3V; requires external pullup for system monitoring. |
| 5 GND | Analog/digital ground reference | Common return for all signals; EP must be soldered to PCB ground plane for thermal and electrical integrity. |
| 6 GATE | Charge-pump gate driver output | Sources 75µA to drive external n-MOSFET gate; clamped to ≤18V above OUT; fast turn-off (<100ns) during OV fault. |
| 7 OUT | Output voltage sense node | Connected to source of external n-MOSFET; used as feedback point in limiter mode; referenced by SET divider. |
| 8 REG | Fixed 3.3V linear regulator output | Delivers up to 100mA; bypassed with ≥4.7µF ceramic capacitor; independent of SHDN and GATE state. |
Key Features
| Feature | Design Value |
|---|---|
| Dual overvoltage response modes | Configurable as hard disconnect switch or closed-loop voltage limiter (sawtooth GATE) - preserves system operation during transients. |
| User-adjustable OV threshold | Set via single resistor divider on SET pin with ±2.8% accuracy over temperature - eliminates need for trimming or calibration. |
| Integrated 3.3V/100mA linear regulator | Always-on, 37µA IQ, ±2.5% output tolerance - powers critical subsystems without external LDO. |
| Charge-pump gate drive | VIN + 9.2V typical drive with 75µA sourcing - enables use of low-cost, low-RDS(ON) n-channel MOSFETs instead of p-channel. |
| Thermal shutdown with hysteresis | +150°C trip, +130°C recovery - coordinated protection for IC and co-packaged external MOSFET. |
Applications
| Industrial Power Input Protection | FireWire® Interface Power Conditioning |
|---|---|
Use Scenario: 24V/48V DC industrial bus subjected to lightning-induced surges or load-dump transients. IC Role / Device Role / Timing Role: Overvoltage protection controller that isolates downstream PLC I/O modules or sensor nodes during >72V transients. Use Value: Prevents catastrophic failure of 3.3V microcontrollers by limiting VOUT to 3.3V via limiter mode while maintaining communication during fault. | Use Scenario: FireWire® cable hot-plug events causing voltage overshoot on 12V auxiliary power rail. IC Role / Device Role / Timing Role: Fast-response OV limiter controlling external n-MOSFET to clamp VOUT at 12V ±5% during plug-in transients. Use Value: Enables safe hot-swap without resetting connected peripherals, using sawtooth GATE to regulate rather than disconnect. |
| Notebook Computer Always-On Rail | Wall Cube Power Device Regulation |
Use Scenario: Notebook standby power path requiring continuous 3.3V supply to RTC and wake logic from unregulated adapter input. IC Role / Device Role / Timing Role: Dual-function IC providing both 3.3V regulation and input surge protection for always-on subsystems. Use Value: Eliminates need for separate LDO + protector IC; 37µA shutdown IQ extends battery life during sleep states. | Use Scenario: Low-cost AC/DC wall cube powering IoT edge devices with strict input transient immunity requirements. IC Role / Device Role / Timing Role: High-voltage front-end protector interfacing 72V-capable input to 3.3V system rail and external MOSFET switch. Use Value: Achieves UL/IEC surge compliance (e.g., IEC 61000-4-5) with minimal BOM count and no external gate driver. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection + regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6397LATA+T | Fixed 5.0V REG output (vs. 3.3V); identical OV control, pinout, and thermal specs. | Used where main system rail is 5V; not suitable for 3.3V-only loads without post-regulation. | Select when 5V always-on bias is required; same layout and firmware compatibility. |
| TPS26631RGER | Integrated 60V eFuse with current limiting and 3.3V LDO; no adjustable OV threshold; no sawtooth limiter mode. | Targets current-fault protection over voltage-fault; lacks precision OV threshold setting and dual-mode flexibility. | Choose for simpler current-based protection; avoid when precise, user-defined OV trip or limiter operation is mandatory. |
Compared with MAX6397LATA+T, the MAX6397SATA+T delivers matched protection functionality but targets 3.3V subsystems directly; versus TPS26631RGER, it offers superior OV threshold adjustability and true voltage-limiting behavior essential for transient-resilient 3.3V always-on designs.
Availability
MAX6397SATA+T is available at Aetrix Electronics and suitable for industrial power input protection, FireWire® interface conditioning, notebook always-on rail management, and wall cube power device regulation requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for MAX6397SATA+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 demanding industrial, automotive, and computing applications.
The MAX6397 series targets high-reliability power front-end protection, combining adjustable overvoltage control with integrated low-quiescent linear regulation to simplify robust power architecture design in harsh environments.
FAQ
What is the exact output voltage tolerance of the MAX6397SATA+T linear regulator?
The MAX6397SATA+T delivers a factory-trimmed 3.3V output with ±2.5% tolerance over full load (1mA–100mA) and temperature (-40°C to +125°C), verified per Electrical Characteristics table on page 2 of the datasheet. This ensures reliable biasing of 3.3V logic without external trimming.
Can the MAX6397SATA+T operate in overvoltage-limiter mode with a 3.3V output target?
Yes - the MAX6397SATA+T supports overvoltage-limiter mode regardless of its internal REG voltage. When configured as a limiter, the SET pin monitors VOUT (not REG), allowing precise clamping of any downstream rail - including 3.3V - at user-defined thresholds via resistor divider.
Does the MAX6397SATA+T require external components to set the overvoltage threshold?
Yes - the MAX6397SATA+T uses an external resistor divider from IN or OUT to the SET pin to define the overvoltage threshold. With SET's 1.215V reference, a two-resistor network (e.g., 240kΩ + 3.79MΩ for 20V trip) provides accurate, temperature-stable adjustment without trimming.
How does the POK output behave during shutdown of the MAX6397SATA+T?
The POK output remains fully functional during SHDN assertion: it continues monitoring the REG output and asserts low if VREG falls below 92.5% or 87.5% of 3.3V, even while GATE is disabled. This enables independent power-good signaling for system reset or monitoring during low-power states.
What thermal considerations apply when using the MAX6397SATA+T with an external MOSFET?
The MAX6397SATA+T includes thermal shutdown at +150°C with 20°C hysteresis and is designed to monitor PCB temperature near the external MOSFET. For effective coordination, mount the MAX6397SATA+T adjacent to the MOSFET's thermal pad and ensure direct thermal coupling - otherwise, thermal protection may not trigger before MOSFET failure.
MAX6397SATA+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:
- Active
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.892V
- 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)
MAX6397SATA+T FAQ
1.How can I place an order for MAX6397SATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6397SATA+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 MAX6397SATA+T reliable?
The price and inventory of MAX6397SATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6397SATA+T is usually 5 days.
3.What payment methods are accepted for MAX6397SATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6397SATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6397SATA+T?
MAX6397SATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6397SATA+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 MAX6397SATA+T?
For technical support, including MAX6397SATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6397SATA+T requirements.
6.How does Aetrix verify that MAX6397SATA+T is sourced from the original manufacturer or authorized distributors?
All MAX6397SATA+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 MAX6397SATA+T meets industry standards.
7.What is the process for return or replacement of MAX6397SATA+T?
All MAX6397SATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6397SATA+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 MAX6397SATA+T part is unused and in its original packaging.
Return procedure for MAX6397SATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6397SATA+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…
