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Analog Devices Inc./Maxim Integrated MAX6773TATD2+T
- Part No.:
- MAX6773TATD2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6773TATD2+T.pdf
- Description:
- IC REG LINEAR 3.3V 8-TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,594
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Product details
Overview
MAX6773TATD2+T from Maxim Integrated is an automotive-grade micropower 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 12.5ms fixed reset timeout (D2 suffix). It operates in -40°C to +125°C and includes open-drain RESET, thermal/short-circuit protection, and AEC-Q100 qualification - deployed in engine control units for always-on power management during ignition-off states.
For engineers reviewing the MAX6773TATD2+T datasheet, MAX6773TATD2+T pinout, MAX6773TATD2+T application, or MAX6773TATD2+T equivalent, key selection criteria include its 1.6s watchdog timeout, 5V fixed output with 4.625V reset threshold (L variant), TDFN-6 package thermal performance (θJA = 42°C/W multilayer), and compatibility with automotive cold-crank (4V) and load-dump (72V) conditions.
Technical Context
The MAX6773TATD2+T implements a high-voltage linear regulator core with internal 1.233V reference and precision error amplifier, supporting fixed 5.0V output (L suffix) and active-low open-drain RESET with factory-trimmed 4.625V falling threshold. Its supervisor block integrates a capacitor-adjustable reset timeout (D2 = 12.5ms typ) and a non-disableable 1.6s watchdog timer monitoring WDI for µP health.
This device uses single active-high ENABLE control (no HOLD or dual-enable logic), features 620mV dropout at 100mA/5V, and embeds overtemperature shutdown (160°C trip, 20°C hysteresis) plus current limiting (150–250mA short-circuit protection). All functions are fully specified across -40°C to +125°C ambient and qualified to AEC-Q100 Grade 0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 72V - supports automotive battery transients including cold-crank (4V) and load-dump (72V). |
| Output Voltage | 5.0V ±1.5% (L option) - factory-trimmed for stable MCU core/logic rail under full temperature and load range. |
| Quiescent Current | 38µA (typ) at no load - enables <10µA system standby current when paired with low-IQ downstream circuitry. |
| Watchdog Timeout | 1.6s (typ) - detects µP lockup in infotainment or ADAS modules without requiring external timing components. |
| Reset Timeout | 12.5ms (D2 option) - ensures reliable µP initialization after brownout recovery with fixed capacitor-free timing. |
| Dropout Voltage | 620mV at 100mA/5V - maintains regulation down to VIN = 5.62V, critical for start-stop operation. |
| Operating Temp | -40°C to +125°C - fully characterized for under-hood ECU placement with no derating required. |
Pinout & Package
MAX6773TATD2+T is housed in a thermally enhanced 3mm × 3mm, 6-pin TDFN-EP package (package code T633+2) with exposed pad (EP) connected internally to GND. The package delivers 1.951W power dissipation capability on multilayer PCBs (θJA = 42°C/W), enabling continuous operation at high ambient temperatures and full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts 4V–72V supply; requires ≥0.1µF ceramic bypass to GND for stability during load transients. |
| 2 GND | Ground Reference | Power and signal return; EP must be soldered to PCB ground plane for thermal and EMI performance. |
| 3 ENABLE | Active-High Enable | Drives regulator ON when >1.4V; internally pulled down (0.6µA) - compatible with 3.3V/5V logic without external resistor. |
| 4 RESET | Active-Low Open-Drain Output | Sinks 3.2mA max; requires external pullup to VCC or µP VDD; asserts when VOUT < 4.625V (L option). |
| 5 TIMEOUT | Reset Timeout Adjust | Connected to OUT for fixed 12.5ms timeout (D2); floating or capacitor-connected for adjustable timing. |
| 6 OUT | Regulated Output | Delivers 5.0V @ up to 100mA; requires ≥10µF ceramic output capacitor with ≤10mΩ ESR for stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 0 (-40°C to +125°C) qualification confirmed - meets automotive reliability and stress-test requirements. |
| Integrated Watchdog Timer | 1.6s timeout prevents silent µP failure in safety-critical ECUs without adding discrete timing ICs or firmware overhead. |
| Low Dropout Performance | 620mV dropout at 100mA enables operation during 6V battery sag - sustains ECU functionality through engine cranking. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis prevents latch-up during overload or poor heatsinking - self-recovering under intermittent fault. |
| Fixed Reset Threshold | 4.625V (L option) provides precise brownout detection for 5V systems - eliminates need for external voltage divider calibration. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers microcontroller and CAN transceiver in gasoline/diesel ECU during ignition-off "keep-alive" mode. IC Role / Device Role / Timing Role: Primary 5V LDO with watchdog supervision - monitors µP execution and asserts RESET on firmware hang or voltage collapse. Use Value: Enables fail-safe restart after brownout without external supervisor IC; 38µA IQ extends battery life during weeks of parking. |
Use Scenario: Supplies door module MCU and LIN transceiver in vehicle entry systems with wake-on-RF capability. IC Role / Device Role / Timing Role: Always-on 5V regulator with 12.5ms fixed reset timeout - ensures deterministic boot after wake-from-sleep events. Use Value: Eliminates need for external RC reset timing network; D2 suffix guarantees consistent 12.5ms delay across temperature and voltage. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Telematics Control Unit (TCU) |
Use Scenario: Provides clean 5V rail to image sensor and ISP in rear-view camera module mounted near exhaust. IC Role / Device Role / Timing Role: High-temp linear regulator with thermal shutdown - maintains regulation at +105°C ambient while rejecting battery ripple. Use Value: 1.951W package power handling avoids derating at 100mA load; θJA = 42°C/W enables compact layout without heatsink. |
Use Scenario: Powers cellular modem and GPS receiver in fleet telematics unit exposed to wide battery voltage swings. IC Role / Device Role / Timing Role: Wide-input LDO with 72V surge tolerance - survives ISO 7637-2 Pulse 5a load-dump events without clamping diodes. Use Value: Internal overvoltage protection (1.1x VOUT) and 620mV dropout prevent modem reset during cranking - improves GNSS TTFF reliability. |
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 |
|---|---|---|---|
| MAX6773TATD4+T | Same 5V/4.625V/L/D family but with 200ms reset timeout (D4) instead of 12.5ms (D2). | Suitable for systems requiring longer reset hold time during slow-rising power rails (e.g., HVAC controllers). | Select D4 only if extended reset assertion is needed; D2 provides faster recovery for time-critical ECUs. |
| 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 industrial applications; lacks high-voltage input and automotive qualification. | Not a drop-in replacement; use only in non-automotive, low-voltage secondary regulation where watchdog and 72V tolerance are unnecessary. |
Compared with MAX6773TATD4+T and TLV70750PDQNR, the MAX6773TATD2+T uniquely combines AEC-Q100 qualification, 4V–72V operation, integrated 1.6s watchdog, and factory-trimmed 12.5ms reset timeout - making it the only choice for primary 5V regulation in safety-critical automotive ECUs requiring deterministic startup and runtime supervision.
Availability
MAX6773TATD2+T is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera ECUs, and telematics control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6773TATD2+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 automotive, industrial, and communications markets.
The MAX6765–MAX6774B family was engineered specifically for automotive always-on power domains, integrating ultra-low quiescent current regulation, robust supervision, and AEC-Q100 reliability into thermally efficient TDFN packages.
FAQ
What is the watchdog timeout period for MAX6773TATD2+T?
The MAX6773TATD2+T features a non-disableable watchdog timer with a typical timeout period of 1.6 seconds. This value is fixed per the MAX6773/MAX6774 variant designation and is not adjustable. The watchdog monitors the WDI pin and asserts the RESET output if no valid edge is detected within this window, ensuring µP health in automotive control applications where MAX6773TATD2+T is deployed.
Does MAX6773TATD2+T support adjustable output voltage?
No, MAX6773TATD2+T does not support adjustable output voltage. Its part number suffix "L" indicates a fixed 5.0V output option. While the broader MAX6773 family supports adjustable outputs via the SET pin (e.g., MAX6773TATD2+T with "L" is preset-only), this specific variant has internal feedback resistors trimmed for 5.0V and requires SET to be connected to GND - making MAX6773TATD2+T a dedicated fixed-output solution.
What is the reset threshold voltage for MAX6773TATD2+T?
The MAX6773TATD2+T has a factory-trimmed reset threshold of 4.625V (minimum 4.500V, maximum 4.750V) for the falling edge of the regulated output. This value corresponds to the "L" output voltage option and is guaranteed across -40°C to +125°C. The RESET output remains asserted until the output exceeds this threshold and then stays low for the full 12.5ms timeout (D2) before deasserting - a behavior confirmed in the MAX6773TATD2+T datasheet.
Is MAX6773TATD2+T AEC-Q100 qualified?
Yes, MAX6773TATD2+T is AEC-Q100 qualified per Grade 0 specifications (-40°C to +125°C ambient operating temperature). This qualification is explicitly documented for the MAX6773TA_D_/V+ series in the official Maxim Integrated datasheet, and the "/V+" suffix in MAX6773TATD2+T confirms automotive qualification. The device undergoes stress testing for HTOL, TC, UHAST, and other AEC-Q100 requirements - essential for MAX6773TATD2+T deployment in engine bay ECUs.
What package type and thermal performance does MAX6773TATD2+T use?
MAX6773TATD2+T uses a 3mm × 3mm, 6-pin TDFN-EP package (outline 21-0137) with exposed pad connected to GND. On a multilayer PCB, it achieves θJA = 42°C/W and can dissipate up to 1.951W continuously. This thermal design allows MAX6773TATD2+T to deliver full 100mA output at +105°C ambient without derating - critical for under-hood applications where MAX6773TATD2+T replaces bulkier solutions requiring external heatsinks.
MAX6773TATD2+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:
- 3.053V, 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)
MAX6773TATD2+T FAQ
1.How can I place an order for MAX6773TATD2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6773TATD2+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 MAX6773TATD2+T reliable?
The price and inventory of MAX6773TATD2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6773TATD2+T is usually 5 days.
3.What payment methods are accepted for MAX6773TATD2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6773TATD2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6773TATD2+T?
MAX6773TATD2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6773TATD2+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 MAX6773TATD2+T?
For technical support, including MAX6773TATD2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6773TATD2+T requirements.
6.How does Aetrix verify that MAX6773TATD2+T is sourced from the original manufacturer or authorized distributors?
All MAX6773TATD2+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 MAX6773TATD2+T meets industry standards.
7.What is the process for return or replacement of MAX6773TATD2+T?
All MAX6773TATD2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6773TATD2+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 MAX6773TATD2+T part is unused and in its original packaging.
Return procedure for MAX6773TATD2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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