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Analog Devices Inc./Maxim Integrated MAX6774BTALD2+
- Part No.:
- MAX6774BTALD2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6774BTALD2+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,389
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Product details
Overview
MAX6774BTALD2+ from Maxim Integrated is an automotive-grade micropower linear regulator with integrated supervisor and watchdog timer, delivering up to 100mA at 3.3V output from 4V–72V input, featuring 38µA quiescent current, open-drain active-low RESET, and 12.5ms fixed reset timeout - ideal for always-on vehicle control modules requiring reliable power sequencing and microprocessor supervision.
For engineers reviewing the MAX6774BTALD2+ datasheet, MAX6774BTALD2+ pinout, MAX6774BTALD2+ application, or MAX6774BTALD2+ equivalent, key selection considerations include its AEC-Q100 qualification, 3.3V fixed output with 3.053V reset threshold (T option), watchdog timeout of 50ms (B variant), thermal shutdown at +160°C, and compatibility with high-ambient automotive environments.
Technical Context
The MAX6774BTALD2+ implements a high-voltage linear regulation architecture with internal 1.233V reference and precision feedback control, supporting fixed 3.3V output (T suffix) and active-low open-drain RESET with factory-trimmed 3.053V threshold (T option). Its watchdog timer monitors WDI for pulse edges and asserts RESET if no transition occurs within 50ms (typ), with automatic clearing on edge detection or RESET assertion.
This device uses ENABLE-only activation (no HOLD or dual-enable inputs), integrates overtemperature and short-circuit protection, and operates across –40°C to +125°C with full specification including line/load regulation (≤1.5%), PSRR (70dB @ 100Hz), and dropout voltage of 866mV (typ) at 100mA load for 3.3V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 72V - supports wide automotive battery transients including cold-crank and load-dump conditions. |
| Output Voltage | Fixed 3.3V ±2.5% - factory-trimmed for stable logic supply in MCU/ASIC systems. |
| Quiescent Current | 38µA (typ) at no load - enables ultra-low-power "always-on" operation without draining vehicle battery. |
| Reset Threshold | 3.053V (T option) - triggers RESET when regulated output falls below this precise level during brownout. |
| Reset Timeout | 12.5ms (D2 option) - ensures µP remains held in reset long enough for stable power recovery. |
| Watchdog Timeout | 50ms (typ) - detects µP lockup or firmware hang in safety-critical automotive subsystems. |
| Dropout Voltage | 866mV (typ) at 100mA - allows regulation down to VIN = 4.166V while maintaining 3.3V output. |
Pinout & Package
MAX6774BTALD2+ is housed in a thermally enhanced 6-pin 3mm × 3mm TDFN-EP package with exposed pad (EP) connected internally to GND, enabling up to 1.951W power dissipation at +70°C ambient and supporting continuous operation under high-temperature automotive conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Bypassed to GND with ≥0.1µF capacitor; accepts 4V–72V supply with transient robustness. |
| 2 GND | Ground Reference | Primary return path for regulator, RESET, TIMEOUT, and WDI circuits; EP must be soldered to PCB ground plane. |
| 3 ENABLE | Active-High Enable Input | Drives regulator ON when pulled ≥1.4V; internally pulldown-biased (0.6µA sink) for default OFF state. |
| 4 RESET | Active-Low Open-Drain Reset Output | Pulled low during fault or brownout; requires external pullup to VCC or µP VDD for proper logic-level interface. |
| 5 TIMEOUT | Reset Timeout Adjustment | Connected to OUT for fixed 12.5ms timeout (D2); capacitor to GND enables adjustable timing per datasheet formula. |
| 6 OUT | Regulated Output | Delivers up to 100mA at 3.3V; bypassed with ≥10µF capacitor to ensure stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for automotive applications across –40°C to +125°C junction temperature with full reliability testing. |
| Integrated Watchdog Timer | 50ms timeout (B variant) detects µP firmware stalls and forces hardware reset without software intervention. |
| Factory-Trimmed Reset Threshold | 3.053V (T option) provides precise brownout detection aligned to 3.3V system requirements. |
| Thermal & Short-Circuit Protection | Shuts down at +160°C (typ) with 20°C hysteresis; limits output current to 150–250mA during overload. |
| Low Dropout Performance | 866mV dropout at 100mA enables operation with minimal headroom - critical for 12V battery systems. |
Applications
| Engine Control Unit (ECU) Power Supervision | Body Control Module (BCM) Always-On Supply |
|---|---|
Use Scenario: Powers microcontroller and CAN transceiver in engine bay under wide temperature and voltage transients. IC Role / Device Role / Timing Role: Provides stable 3.3V rail and asserts RESET during cranking-induced brownout or thermal fault. Use Value: Ensures deterministic µP reset and prevents code corruption during cold-start or load-dump events. |
Use Scenario: Supplies real-time clock, door-lock logic, and sensor interface in BCM with zero-power standby requirement. IC Role / Device Role / Timing Role: Delivers 3.3V at 38µA IQ while monitoring supply integrity and watchdog activity. Use Value: Enables >1-year battery life in parked vehicle mode without compromising wake-up reliability. |
| Advanced Driver Assistance System (ADAS) Camera Module | Automotive Infotainment Power Sequencing |
Use Scenario: Powers image signal processor and serializer in rear-view camera exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Regulates 3.3V supply and asserts RESET if voltage drops below 3.053V or watchdog fails to toggle. Use Value: Prevents corrupted video stream due to undervoltage or firmware freeze in safety-critical vision systems. |
Use Scenario: Manages power-up sequence for display controller, audio codec, and connectivity SoC in head unit. IC Role / Device Role / Timing Role: Generates synchronized 12.5ms RESET pulse after stable 3.3V rail is established. Use Value: Guarantees deterministic boot order and eliminates race conditions between subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive linear regulator with supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6773BTALD2+ | Same pinout, 3.3V output, 3.053V reset, but 1.6s watchdog timeout (non-B variant) | Suitable for non-safety-critical subsystems where longer watchdog response is acceptable | Select when slower fault detection is permissible and legacy design reuse is prioritized |
| TPS7B8133QDCYRQ1 | 3.3V LDO with 35µA IQ, 40V max input, no integrated watchdog or adjustable reset timeout | Lacks supervisor features; requires external reset IC for brownout/watchdog functionality | Choose when only basic regulation is needed and discrete supervision is already implemented |
Compared with MAX6773BTALD2+, the MAX6774BTALD2+ offers faster 50ms watchdog response for time-critical ADAS functions; versus TPS7B8133QDCYRQ1, it integrates complete supervision - eliminating BOM cost and board space for external reset ICs.
Availability
MAX6774BTALD2+ is available at Aetrix Electronics and suitable for automotive ECU, body control module, ADAS camera, infotainment, and industrial control applications requiring stable component supply, AEC-Q100 compliance, and extended temperature operation.
Supply support for MAX6774BTALD2+ 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 high-performance analog and mixed-signal semiconductors for automotive, industrial, and communications markets, emphasizing reliability, integration, and power efficiency.
The MAX6765–MAX6774B product line delivers automotive-qualified micropower regulators with integrated supervision - engineered specifically for always-on vehicle modules needing ultra-low IQ, wide VIN range, and robust fault handling.
FAQ
What is the watchdog timeout period for MAX6774BTALD2+?
The MAX6774BTALD2+ features a 50ms typical watchdog timeout period (B variant), meaning it asserts the RESET output if the WDI pin remains static (high or low) beyond this duration. This value is fixed per device variant and cannot be adjusted. The watchdog timer clears on any valid rising or falling edge at WDI and resumes counting after RESET deasserts. MAX6774BTALD2+ does not support watchdog disable.
Does MAX6774BTALD2+ support adjustable output voltage?
No, MAX6774BTALD2+ provides a fixed 3.3V output (T suffix). While the broader MAX6774B family supports adjustable outputs via the SET pin, the MAX6774BTALD2+ variant has SET internally connected to GND and is factory-trimmed for 3.3V. Its electrical characteristics - including load regulation (±1.5%) and dropout voltage (866mV typ at 100mA) - are specified exclusively for this fixed-output configuration.
What is the reset threshold voltage for MAX6774BTALD2+?
The MAX6774BTALD2+ has a factory-trimmed reset threshold of 3.053V (T option), guaranteed between 2.970V and 3.135V over –40°C to +125°C. This threshold applies to the regulated OUT voltage: RESET asserts when OUT falls below this level and remains asserted for the full 12.5ms timeout (D2 option) after OUT recovers above the threshold.
Is MAX6774BTALD2+ AEC-Q100 qualified?
Yes, MAX6774BTALD2+ is AEC-Q100 qualified (Grade 0: –40°C to +125°C), as confirmed by Maxim Integrated's official documentation and ordering information. This qualification covers stress testing for temperature cycling, humidity, ESD, and lifetime reliability - making it suitable for front-end automotive applications including engine bay and chassis modules.
What package type and thermal performance does MAX6774BTALD2+ use?
MAX6774BTALD2+ uses a 6-pin 3mm × 3mm TDFN-EP package with exposed pad (EP) connected to GND. At +70°C ambient, it supports up to 1.951W power dissipation; derating is 24.4mW/°C above +70°C. With proper PCB copper area (1in², 2oz), this enables continuous 100mA operation even at +125°C ambient - critical for under-hood automotive deployment.
MAX6774BTALD2+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.625V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 8.75ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX6774BTALD2+ FAQ
1.How can I place an order for MAX6774BTALD2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6774BTALD2+ 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 MAX6774BTALD2+ reliable?
The price and inventory of MAX6774BTALD2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6774BTALD2+ is usually 5 days.
3.What payment methods are accepted for MAX6774BTALD2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6774BTALD2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6774BTALD2+?
MAX6774BTALD2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6774BTALD2+ 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 MAX6774BTALD2+?
For technical support, including MAX6774BTALD2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6774BTALD2+ requirements.
6.How does Aetrix verify that MAX6774BTALD2+ is sourced from the original manufacturer or authorized distributors?
All MAX6774BTALD2+ 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 MAX6774BTALD2+ meets industry standards.
7.What is the process for return or replacement of MAX6774BTALD2+?
All MAX6774BTALD2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6774BTALD2+, 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 MAX6774BTALD2+ part is unused and in its original packaging.
Return procedure for MAX6774BTALD2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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