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Analog Devices Inc./Maxim Integrated MAX6771TAWD0+T
- Part No.:
- MAX6771TAWD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6771TAWD0+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,107
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Product details
Overview
MAX6771TAWD0+T from Maxim Integrated is a dual-enable, automotive-grade micropower linear regulator with integrated supervisor and open-drain RESET output. It operates from 4V to 72V input, delivers 100mA output at fixed 3.3V (T suffix), features 31µA quiescent current, 75µs fixed reset timeout (D0), and is qualified for -40°C to +125°C operation in automotive power modules.
For engineers reviewing the MAX6771TAWD0+T datasheet, MAX6771TAWD0+T pinout, MAX6771TAWD0+T application, or MAX6771TAWD0+T equivalent, key selection criteria include dual-enable logic compatibility with ignition/bus transceiver control, 3.3V output stability under high-temperature battery conditions, low-quiescent-current supervision, and AEC-Q100-compliant thermal robustness.
Technical Context
The MAX6771TAWD0+T implements dual active-high enable inputs (ENABLE1 and ENABLE2) to support redundant or hierarchical power-on sequencing-e.g., one driven by ignition switch, the other by CAN/LIN transceiver activity. Its supervisor circuit monitors the regulated 3.3V output and asserts an open-drain RESET signal when voltage falls below 2.888V (S threshold), holding it low for ≥75µs after recovery.
This variant lacks watchdog (WDI) and HOLD inputs-confirmed by pin mapping and functional diagrams-and uses fixed-output configuration (SET tied to GND). It integrates overtemperature shutdown (160°C trip, 20°C hysteresis) and short-circuit protection, with thermal performance enabled by its 3mm × 3mm TDFN-EP package (θJA = 42°C/W on multilayer board).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 72V - supports full automotive battery range including load dump (up to 80V absolute max). |
| Output Voltage | Fixed 3.3V ±1.5% - stable for MCU core/logic rails; specified across -40°C to +125°C. |
| Quiescent Current | 31µA at no load - enables always-on functionality without excessive battery drain. |
| Reset Threshold | 2.888V (S option) - triggers RESET during brownout before 3.3V rail collapses critical logic. |
| Reset Timeout | 75µs minimum - ensures µP reset pulse meets minimum assertion time for reliable boot initialization. |
| Output Current | 100mA guaranteed - sufficient for small microcontrollers, sensors, and interface ICs in body electronics. |
| Dropout Voltage | 866mV at 100mA - allows regulation down to VIN ≈ 4.17V while maintaining 3.3V output. |
Pinout & Package
MAX6771TAWD0+T is housed in a thermally enhanced 6-pin TDFN-EP (3mm × 3mm, package code T633+2) with exposed pad (EP) connected internally to GND. The EP must be soldered to PCB ground plane for optimal thermal dissipation (θJC = 9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts 4V–72V supply; requires ≥0.1µF bypass capacitor to GND for stability. |
| 2 GND | Ground Reference | Power and signal return; connects to EP for thermal path. |
| 3 ENABLE1 | Active-High Enable 1 | Drives regulator ON when >1.4V; internally pulled down (0.6µA) to GND when floating. |
| 4 ENABLE2 | Active-High Enable 2 | Second independent enable; identical electrical specs to ENABLE1; both must be high for regulation. |
| 5 RESET | Active-Low Open-Drain Output | Sinks up to 3.2mA; requires external pull-up to VCC or µP I/O; asserts during undervoltage. |
| 6 OUT | Regulated Output | Delivers 3.3V @ ≤100mA; requires ≥10µF output capacitor (low-ESR ceramic or tantalum). |
Key Features
| Feature | Design Value |
|---|---|
| Dual Enable Logic | Independent ENABLE1/ENABLE2 inputs allow flexible power sequencing-e.g., ignition-driven startup + bus-transceiver confirmation before enabling downstream logic. |
| Automotive Thermal Robustness | Operates continuously from -40°C to +125°C ambient; thermal shutdown (160°C) with 20°C hysteresis prevents latch-up during sustained overload. |
| Low-IQ Supervision | 31µA quiescent current + 75µs reset timeout enables reliable µP reset in always-on domains (e.g., CAN wake-up circuits) without compromising battery life. |
| High-Voltage Input Tolerance | Withstands 80V absolute max input-covers ISO 7637-2 pulse 5a (load dump) without external TVS, reducing BOM count. |
| Fixed 3.3V Output Accuracy | ±1.5% load/line regulation over full temperature and load range ensures consistent logic-level compatibility for automotive MCUs and PHYs. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
|
Use Scenario: Powering microcontroller, LIN transceiver, and door-lock actuators in low-power standby mode with ignition-off wake capability. IC Role / Device Role / Timing Role: Primary 3.3V regulator with dual-enable sequencing (ignition + LIN activity) and brownout detection to prevent MCU corruption during battery sag. Use Value: 31µA IQ extends vehicle sleep current budget; 75µs RESET ensures deterministic MCU restart after transient dips below 2.89V. |
Use Scenario: Supplying image sensor and ISP in rear-view camera module, requiring stable 3.3V under engine cranking (5.5V min) and load dump (72V max). IC Role / Device Role / Timing Role: High-input-voltage LDO with integrated supervisor-replaces discrete reset IC and reduces layout area vs. separate regulator + supervisor solution. Use Value: 866mV dropout at 100mA enables regulation during cranking; AEC-Q100 qualification validates reliability in harsh under-hood environments. |
| Telematics Control Unit (TCU) | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: Providing clean 3.3V to cellular modem, GNSS receiver, and CAN controller in always-connected telematics gateway. IC Role / Device Role / Timing Role: Always-on regulator with dual-enable logic-EN1 tied to main 12V rail, EN2 tied to CAN transceiver READY signal-to prevent boot before network readiness. Use Value: Dual-enable architecture eliminates need for external AND gate; 4V–72V range accommodates wide battery fluctuations during fleet operation. |
Use Scenario: Powering torque and position sensors in EPS motor control unit, where EMI immunity and thermal resilience are critical. IC Role / Device Role / Timing Role: Low-noise, thermally robust 3.3V source with built-in reset monitoring-ensures sensor data validity during voltage sags caused by motor commutation spikes. Use Value: 42°C/W θJA on multilayer board sustains 100mA output at +105°C ambient; open-drain RESET interfaces directly to safety MCU's NMI input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower linear regulator with supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6772TAWD0+T | Identical pinout, specs, and dual-enable function-but rated for industrial (-40°C to +105°C), not AEC-Q100 automotive. | Lacks automotive qualification; unsuitable for safety-critical or OEM-specified automotive designs. | Select MAX6772TAWD0+T only for non-automotive industrial control where AEC-Q100 is not required. |
| TLV70733PDQNR | Single-enable, 200mA, 2.5µA IQ, 2.7V–5.5V input-no supervisor, no high-voltage capability, no AEC-Q100 rating. | Cannot replace MAX6771TAWD0+T in automotive 12V/24V systems or brownout supervision roles. | Only consider for low-voltage, low-power portable applications where input <6V and supervision is handled externally. |
Compared with MAX6771TAWD0+T, MAX6772TAWD0+T offers identical functionality but lacks AEC-Q100 validation, while TLV70733PDQNR fails to meet input voltage, supervision, and qualification requirements-making MAX6771TAWD0+T the sole fit for dual-enable automotive 3.3V regulation with integrated reset.
Availability
MAX6771TAWD0+T is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, telematics gateways, and electric power steering sensor interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6771TAWD0+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 communications applications.
The MAX6765–MAX6774B family was engineered specifically for automotive micropower regulation with integrated supervision-targeting always-on modules needing ultra-low IQ, high-voltage tolerance, and AEC-Q100 reliability.
FAQ
What is the function of ENABLE1 and ENABLE2 on the MAX6771TAWD0+T?
ENABLE1 and ENABLE2 are independent active-high inputs that must both be driven above 1.4V to activate the regulator. This dual-enable architecture supports fault-tolerant power sequencing-for example, one input tied to ignition voltage and the other to a bus transceiver READY signal-ensuring the MAX6771TAWD0+T only powers up when both system conditions are met.
Does the MAX6771TAWD0+T include a watchdog timer?
No, the MAX6771TAWD0+T does not include a watchdog timer. Watchdog functionality (WDI input and timeout logic) is exclusive to the MAX6773/MAX6773B/MAX6774/MAX6774B variants. The MAX6771TAWD0+T provides only voltage supervision via its RESET output and dual-enable control-no WDI pin is present in its 6-pin TDFN package.
What is the reset threshold voltage for the MAX6771TAWD0+T?
The MAX6771TAWD0+T uses the "S" reset threshold option, resulting in a nominal RESET assertion point of 2.888V (with tolerance of 2.805V to 2.970V over temperature and process). This threshold is factory-trimmed and applies to monitoring the internal 3.3V output-no external resistor divider is needed or supported for reset threshold adjustment.
Can the output voltage of the MAX6771TAWD0+T be adjusted?
No, the MAX6771TAWD0+T provides a fixed 3.3V output only. The "T" in the part number denotes the 3.3V option, and this variant has no SET pin or adjustable feedback capability. Adjustable-output versions (e.g., MAX6773TAWD0+T) require different pinouts and internal architecture-MAX6771TAWD0+T is strictly fixed-output.
Is the MAX6771TAWD0+T RoHS-compliant and lead-free?
Yes, the "+T" suffix in MAX6771TAWD0+T explicitly indicates a lead(Pb)-free and RoHS-compliant package. The device meets EU RoHS Directive 2011/65/EU and is compatible with standard Pb-free reflow soldering profiles (peak temperature +260°C).
MAX6771TAWD0+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:
- 1.665V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 75µs Typical
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX6771TAWD0+T FAQ
1.How can I place an order for MAX6771TAWD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6771TAWD0+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 MAX6771TAWD0+T reliable?
The price and inventory of MAX6771TAWD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6771TAWD0+T is usually 5 days.
3.What payment methods are accepted for MAX6771TAWD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6771TAWD0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6771TAWD0+T?
MAX6771TAWD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6771TAWD0+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 MAX6771TAWD0+T?
For technical support, including MAX6771TAWD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6771TAWD0+T requirements.
6.How does Aetrix verify that MAX6771TAWD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6771TAWD0+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 MAX6771TAWD0+T meets industry standards.
7.What is the process for return or replacement of MAX6771TAWD0+T?
All MAX6771TAWD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6771TAWD0+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 MAX6771TAWD0+T part is unused and in its original packaging.
Return procedure for MAX6771TAWD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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