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Analog Devices Inc./Maxim Integrated MAX6773BTALD2+
- Part No.:
- MAX6773BTALD2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6773BTALD2+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,883
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Product details
Overview
MAX6773BTALD2+ from Maxim Integrated is a micropower automotive-grade linear regulator with integrated supervisor and watchdog timer, delivering 100mA at 5.0V output (L option), featuring 38µA quiescent current, 4V–72V input range, and fixed 12.5ms reset timeout (D2 suffix). It operates across –40°C to +125°C and includes open-drain RESET, thermal/short-circuit protection, and AEC-Q100 qualification - used in engine control units for stable low-power microcontroller biasing during cold cranking.
For engineers reviewing the MAX6773BTALD2+ datasheet, MAX6773BTALD2+ pinout, MAX6773BTALD2+ application, or MAX6773BTALD2+ equivalent, key selection considerations include its 5V fixed output with 4.625V reset threshold (TAL), 12.5ms capacitor-adjustable reset timeout, 1.6s watchdog timeout (MAX6773B variant), and TDFN-6 package compatibility with high-temperature automotive PCB layouts.
Technical Context
The MAX6773BTALD2+ integrates a high-voltage linear regulator with precision bandgap reference (1.233V), dual-mode supervisor logic (RESET assertion on VOUT drop below 4.625V), and a non-disableable watchdog timer monitoring WDI transitions with 50ms typical timeout. Its enable architecture uses a single active-high ENABLE input without HOLD or dual-enable functionality.
It implements fixed-output regulation (5.0V ±1.5%) with dropout of 620mV at 100mA, supports external RESET timeout adjustment via TIMEOUT-to-GND capacitor (12.5ms nominal with D2 configuration), and features overtemperature shutdown at +160°C with 20°C hysteresis - all specified over full automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 72V - supports full automotive battery range including load dump (80V abs max) and cold-crank dips. |
| Output Voltage | 5.0V ±1.5% (L option) - factory-trimmed for direct µP core/bias rail without external feedback. |
| Quiescent Current | 38µA (typ) at no load - enables always-on operation in vehicle modules with <100µA system standby budgets. |
| Reset Threshold | 4.625V (TAL suffix) - asserts RESET when VOUT drops below this level, ensuring reliable µP reset during brownout. |
| Reset Timeout | 12.5ms (D2 suffix) - fixed internal timeout ensures µP reset pulse meets minimum assertion time per JEDEC JESD84-B51. |
| Watchdog Timeout | 50ms (typ) - MAX6773B variant detects µP lockup faster than standard 1.6s versions, critical for safety-critical ECUs. |
| Dropout Voltage | 620mV at 100mA - enables regulation down to VIN = 5.62V, supporting operation during 6V battery sag. |
Pinout & Package
MAX6773BTALD2+ is housed in a thermally enhanced 3mm × 3mm, 6-pin TDFN-EP package (exposed pad soldered to GND plane), rated for 1.951W dissipation at TA ≤ +70°C with 23.8mW/°C derating above.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Bypassed to GND with ≥0.1µF ceramic; accepts 4V–72V supply, including transients up to +80V (abs max). |
| 2 GND | Ground Reference | Primary return path for regulator, RESET, and WDI; exposed pad (EP) must be soldered to PCB ground plane for thermal management. |
| 3 ENABLE | Active-High Enable | Drives regulator ON when >1.4V; internally pulled down (0.6µA sink); controls power sequencing in ignition-controlled systems. |
| 4 RESET | Active-Low Open-Drain Output | Asserts low during VOUT undervoltage or WDI timeout; requires external pullup to VOUT or µP VDD for proper logic level. |
| 5 TIMEOUT | Reset Timeout Adjustment | Connected to OUT for fixed 12.5ms timeout (D2); capacitor to GND adjusts timeout per tRP = C × 1.22MΩ (L/M/T/S options). |
| 6 OUT | Regulated Output | 5.0V ±1.5% @ 100mA; bypassed to GND with ≥10µF ceramic; powers µP I/O or sensor interface rails. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Qualified per Grade 0 (–40°C to +150°C junction), enabling use in powertrain and chassis ECUs without additional qualification effort. |
| Integrated Watchdog Timer | 50ms typical timeout (MAX6773B) detects µP hang faster than legacy 1.6s timers, reducing fault detection latency in ASIL-B systems. |
| Thermal & Short-Circuit Protection | Auto-shutdown at +160°C with 20°C hysteresis and current limiting to 150–250mA prevents damage during sustained overload or PCB trace faults. |
| Low Dropout at Full Load | 620mV dropout at 100mA enables stable 5V output even at VIN = 5.62V - critical for cold-crank operation in 12V systems. |
| Capacitor-Adjustable Reset Timeout | TIMEOUT pin supports precise reset pulse width tuning (75µs–200ms) to match µP reset timing requirements without firmware changes. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powers 32-bit MCU and CAN transceiver in gasoline/diesel ECU during cold crank (6V battery) and load dump (80V transient). IC Role / Device Role / Timing Role: Primary 5V bias regulator with watchdog supervision; RESET asserts during undervoltage to halt unsafe code execution. Use Value: 38µA quiescent current minimizes parasitic drain; 72V input rating eliminates need for external TVS clamping in most designs. |
Use Scenario: Supplies door module microcontroller and LIN transceiver in always-on sleep mode with wake-on-LIN capability. IC Role / Device Role / Timing Role: Always-on LDO with 12.5ms RESET pulse and 50ms watchdog - ensures deterministic restart after brownout or software hang. Use Value: AEC-Q100 qualification and –40°C to +125°C operation guarantee reliability across cabin temperature extremes. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Electric Power Steering (EPS) Controller |
|
Use Scenario: Provides clean 5V rail to image signal processor and serializer in rear-view camera module mounted in trunk. IC Role / Device Role / Timing Role: Regulator + supervisor combo replaces discrete reset IC + LDO; RESET monitors VOUT directly for fast response. Use Value: 3mm × 3mm TDFN package saves board space; thermal protection prevents failure during sealed enclosure overheating. |
Use Scenario: Powers torque-sensing ASIC and motor gate driver logic in EPS controller exposed to under-hood temperatures. IC Role / Device Role / Timing Role: High-reliability 5V source with watchdog-enforced firmware health check - critical for steering assist continuity. Use Value: 50ms watchdog timeout enables rapid fault recovery before torque loss exceeds ISO 26262 ASIL-C thresholds. |
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 |
|---|---|---|---|
| MAX6773TALD2+ | 1.6s watchdog timeout (vs. 50ms); same pinout, 5V output, 4.625V reset, D2 timeout. | Suitable for non-safety-critical modules where longer watchdog interval is acceptable (e.g., infotainment). | Select MAX6773TALD2+ only if 1.6s watchdog aligns with system-level fault detection timing budgets. |
| TLV70750PDQNR | Lower voltage range (2.5V–5.5V), no watchdog, no AEC-Q100, 200mA output, SOT-23-5 package. | Limited to post-regulation 5V rails in non-automotive or low-voltage subsystems (e.g., accessory USB hub). | TLV70750PDQNR cannot replace MAX6773BTALD2+ in primary automotive battery-fed applications due to 72V input and AEC-Q100 requirements. |
Compared with MAX6773TALD2+, the MAX6773BTALD2+ provides faster watchdog response for ASIL-B compliance; compared with TLV70750PDQNR, it delivers full battery-direct operation, thermal robustness, and automotive qualification - making it irreplaceable in front-end ECU power domains.
Availability
MAX6773BTALD2+ is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and electric power steering controllers requiring stable component supply under AEC-Q100-compliant automotive production programs.
Supply support for MAX6773BTALD2+ 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 and mixed-signal ICs for automotive, industrial, and communications markets, with deep expertise in power management and supervisory circuits.
The MAX6765–MAX6774B product line targets automotive microcontroller power domains, integrating ultra-low-quiescent LDOs with configurable reset and watchdog functions to simplify ECU power architecture and meet stringent ASIL timing requirements.
FAQ
What is the watchdog timeout period for MAX6773BTALD2+?
The MAX6773BTALD2+ features a 50ms typical watchdog timeout period, characteristic of the "B" variant in the MAX6773 family. This shorter timeout versus the 1.6s MAX6773 enables faster detection of microprocessor lockup in safety-critical automotive applications such as EPS or brake control. The watchdog cannot be disabled and resets only upon WDI edge transition or RESET assertion.
Does MAX6773BTALD2+ require external components for basic operation?
Yes - MAX6773BTALD2+ requires a minimum 0.1µF ceramic capacitor from IN to GND and a 10µF ceramic capacitor from OUT to GND for stability. The TIMEOUT pin is connected to OUT for the fixed 12.5ms reset timeout (D2 suffix); no external capacitor is needed unless adjusting timeout. WDI must be driven by a clean µP output - never left floating.
Is MAX6773BTALD2+ qualified for automotive use?
Yes, MAX6773BTALD2+ is AEC-Q100 qualified (Grade 0, –40°C to +150°C junction temperature) and specified for continuous operation from –40°C to +125°C ambient. Its 72V input rating, thermal shutdown, and 38µA quiescent current meet stringent automotive requirements for engine bay and chassis-mounted ECUs.
What does the "TALD2" suffix indicate in MAX6773BTALD2+?
The "TALD2" suffix decodes as: T = 3.3V output option (but overridden by "L"); L = 5.0V output with 4.625V reset threshold; D2 = 12.5ms fixed reset timeout. The "B" denotes 50ms watchdog timeout. So MAX6773BTALD2+ is a 5V regulator with 4.625V reset, 12.5ms timeout, and 50ms watchdog - confirmed in Maxim's ordering guide Table 2.
Can MAX6773BTALD2+ be used in adjustable-output configurations?
No - MAX6773BTALD2+ is a fixed-output device (5.0V) with preset internal feedback. Adjustable output (1.8V–11V) requires connecting the SET pin to an external resistor divider, but the "L" suffix indicates factory-trimmed 5V operation with SET tied internally to GND. For adjustable variants, select MAX6773Bxxx with "X" or "Y" suffixes instead.
MAX6773BTALD2+ 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:
- Open Drain or Open Collector
- 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)
MAX6773BTALD2+ FAQ
1.How can I place an order for MAX6773BTALD2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6773BTALD2+ 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 MAX6773BTALD2+ reliable?
The price and inventory of MAX6773BTALD2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6773BTALD2+ is usually 5 days.
3.What payment methods are accepted for MAX6773BTALD2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6773BTALD2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6773BTALD2+?
MAX6773BTALD2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6773BTALD2+ 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 MAX6773BTALD2+?
For technical support, including MAX6773BTALD2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6773BTALD2+ requirements.
6.How does Aetrix verify that MAX6773BTALD2+ is sourced from the original manufacturer or authorized distributors?
All MAX6773BTALD2+ 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 MAX6773BTALD2+ meets industry standards.
7.What is the process for return or replacement of MAX6773BTALD2+?
All MAX6773BTALD2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6773BTALD2+, 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 MAX6773BTALD2+ part is unused and in its original packaging.
Return procedure for MAX6773BTALD2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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