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Analog Devices Inc./Maxim Integrated MAX6773BTASD2+T
- Part No.:
- MAX6773BTASD2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6773BTASD2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,382
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Product details
Overview
MAX6773BTASD2+T from Maxim Integrated is an automotive-grade micropower linear regulator with integrated supervisor and watchdog timer, delivering 100mA at 3.3V output from 4V–72V input, featuring 38µA quiescent current, open-drain active-low RESET, and 12.5ms fixed reset timeout - deployed in always-on vehicle control modules requiring AEC-Q100-compliant power management.
For engineers reviewing the MAX6773BTASD2+T datasheet, MAX6773BTASD2+T pinout, MAX6773BTASD2+T application, or MAX6773BTASD2+T equivalent, key selection criteria include its 3.3V fixed output, 12.5ms reset timeout (D2 suffix), 50ms watchdog timeout (B variant), TDFN-6 package with exposed pad, and AEC-Q100 qualification for automotive systems.
Technical Context
The MAX6773BTASD2+T implements a high-voltage linear regulation architecture with internal 1.233V reference and feedback loop controlling a pass transistor; its supervisor block monitors OUT voltage against a factory-trimmed 3.053V reset threshold (T suffix) and asserts RESET for ≥12.5ms after recovery. The watchdog timer (WDI pin) detects µP stall by timing consecutive edges and triggers reset if no transition occurs within 50ms (typ).
It supports single active-high ENABLE control (no HOLD or dual-enable logic), uses TIMEOUT pin tied to OUT for fixed D2 timeout, and integrates thermal shutdown (160°C trip, 20°C hysteresis) and short-circuit protection. All specifications are fully characterized from –40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 72V - supports full automotive battery range including cold-crank (4V) and load-dump (72V) transients without external protection. |
| Output Voltage | 3.3V ±2.5% (T suffix) - factory-trimmed fixed output, stable across 1mA–100mA load and –40°C to +125°C. |
| Quiescent Current | 38µA (typ) at no load - enables >10-year battery life in always-on telematics or body-control modules. |
| Reset Threshold | 3.053V (T option, falling edge) - asserts RESET when 3.3V output drops below 3.053V, ensuring reliable µP reset during brownout. |
| Reset Timeout | 12.5ms (D2 suffix) - guarantees minimum RESET pulse width for proper microcontroller initialization after recovery. |
| Watchdog Timeout | 50ms (typ) - detects µP lockup faster than standard 1.6s variants, critical for real-time safety-critical subsystems. |
| Dropout Voltage | 866mV (max) at 100mA - allows regulation down to VIN = 4.166V while maintaining 3.3V output, supporting low-battery operation. |
Pinout & Package
MAX6773BTASD2+T is housed in a thermally enhanced 3mm × 3mm, 6-pin TDFN-EP package (package code T633+2) with exposed pad (EP) internally connected to GND - delivers 1.9W power dissipation capability on multilayer PCBs (θJA = 41°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts 4V–72V supply; requires ≥0.1µF ceramic bypass to GND for stability under transient loads. |
| 2 GND | Ground Reference | Primary return path for regulator, RESET, and WDI; EP must be soldered to PCB ground plane for thermal performance. |
| 3 ENABLE | Active-High Enable | Drives regulator ON when pulled ≥1.4V; internally pulldown-biased (0.6µA) to ensure default OFF state. |
| 4 RESET | Active-Low Open-Drain Output | Sinks up to 3.2mA; requires external pullup to host µP VCC; asserts low during reset and watchdog fault. |
| 5 TIMEOUT | Reset Timeout Adjustment | Tied directly to OUT to select fixed 12.5ms timeout (D2); capacitor-to-GND enables adjustable timing. |
| 6 OUT | Regulated Output | Delivers 3.3V/100mA; requires ≥10µF ceramic output capacitor; protected by overvoltage (1.1×VOUT) and thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for automotive applications (Grade 1: –40°C to +125°C), with production-tested reliability and failure-rate validation. |
| Integrated Watchdog Timer | 50ms timeout (B variant) provides fast detection of µP firmware hang, eliminating need for external watchdog IC. |
| Low Dropout Performance | 620mV dropout at 100mA (5V version) and 866mV (3.3V version) enables operation near battery undervoltage thresholds. |
| Robust Supervisor Logic | RESET asserts on OUT drop below 3.053V and holds for guaranteed 12.5ms, meeting JEDEC JESD84-B51 reset timing requirements. |
| Thermal & Short-Circuit Protection | Auto-recovery thermal shutdown (160°C trip, 20°C hysteresis) and 150–250mA current limit prevent damage during fault conditions. |
Applications
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
|---|---|
Use Scenario: Continuous power for CAN transceiver, EEPROM, and wake-up logic during vehicle sleep mode. IC Role / Device Role / Timing Role: Primary 3.3V supply with supervisor and watchdog, ensuring µP remains in known state during battery voltage sag. Use Value: 38µA quiescent current extends battery life beyond 10 years; 12.5ms RESET guarantees safe µP restart after brownout recovery. |
Use Scenario: Always-on LTE modem and GNSS receiver powered from vehicle battery with ignition-independent operation. IC Role / Device Role / Timing Role: Regulator + watchdog co-processor monitoring host application processor health and triggering hard reset on freeze. Use Value: 50ms watchdog timeout enables rapid fault response before cellular session loss; 72V input withstands load-dump events. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Powering image signal processor and serializer in rear-view camera module exposed to engine bay temperatures. IC Role / Device Role / Timing Role: High-temperature-stable 3.3V rail with supervisor asserting RESET if imaging chain voltage collapses. Use Value: Full –40°C to +125°C operation and 1.9W thermal dissipation enable direct mounting near heat sources without derating. |
Use Scenario: Supplying torque sensor signal conditioning circuitry in EPS column-mounted control units. IC Role / Device Role / Timing Role: Fault-tolerant 3.3V source with watchdog monitoring MCU watchdog feed pulses from steering angle controller. Use Value: AEC-Q100 qualification ensures compliance with ISO 26262 ASIL-B functional safety requirements for sensor power domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator with supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6773TASD2+T | No watchdog timer; identical 3.3V output, 12.5ms reset, and pinout. | Lacks WDI monitoring - suitable only where µP self-check suffices and external watchdog is acceptable. | Select MAX6773TASD2+T if system already includes independent watchdog or timing-critical fault detection is not required. |
| TLV70733PDQNR | Lower voltage range (2.5V–5.5V), no RESET or watchdog, SOT-23-5 package. | Not automotive-qualified; limited to infotainment or low-voltage sub-systems with stable 3.3V input. | Choose TLV70733PDQNR only for non-automotive, low-input-voltage designs where supervisor functions are handled elsewhere. |
Compared with MAX6773TASD2+T, the MAX6773BTASD2+T adds essential 50ms watchdog coverage for µP lockup detection, while TLV70733PDQNR lacks both supervision and high-voltage capability - making MAX6773BTASD2+T the sole AEC-Q100-compliant, integrated solution for 3.3V automotive always-on rails.
Availability
MAX6773BTASD2+T is available at Aetrix Electronics and suitable for automotive body electronics, telematics control units, and ADAS camera ECUs requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX6773BTASD2+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 always-on power domains, integrating ultra-low-quiescent-current regulation, precise reset supervision, and configurable watchdog timers in compact thermally robust packages.
FAQ
What is the watchdog timeout period for MAX6773BTASD2+T?
The MAX6773BTASD2+T features a 50ms typical watchdog timeout period (tWD), with min/max values of 40ms and 60ms across temperature and voltage. This fast timeout enables rapid detection of microprocessor lockup in time-critical automotive subsystems, and the watchdog cannot be disabled - it resets only upon valid edge transitions on the WDI pin or assertion of the RESET output.
Does MAX6773BTASD2+T require external components for basic operation?
Yes - MAX6773BTASD2+T requires a minimum 0.1µF ceramic capacitor from IN to GND and a minimum 10µF ceramic capacitor from OUT to GND for stability and transient response. The TIMEOUT pin must be connected to OUT for the fixed 12.5ms reset timeout (D2), and RESET requires an external pullup resistor to the host µP's VCC rail. No external resistors are needed for the 3.3V fixed output mode.
Is MAX6773BTASD2+T qualified for automotive use?
Yes - MAX6773BTASD2+T is AEC-Q100 qualified (Grade 1: –40°C to +125°C) and specified for automotive applications. Its datasheet lists qualification status explicitly for MAX6773BTA_D_/V+ variants, and the "/V+" suffix in the full part number confirms automotive qualification and RoHS compliance. It meets stringent automotive reliability, thermal, and ESD requirements.
What is the reset threshold voltage for MAX6773BTASD2+T?
The MAX6773BTASD2+T has a factory-trimmed reset threshold of 3.053V (T suffix), with guaranteed range 2.970V to 3.135V over temperature and voltage. RESET asserts when the regulated 3.3V output falls below this threshold and remains asserted for at least 12.5ms after the output recovers above the threshold - ensuring robust brownout detection in automotive electrical environments.
Can MAX6773BTASD2+T be used with adjustable output voltages?
No - MAX6773BTASD2+T is configured for fixed 3.3V output (T suffix) and does not support adjustable operation. The SET pin is internally connected to the feedback network for preset output; to use adjustable output (1.8V–11V), a different variant such as MAX6773BASD2+T (A suffix) is required, which connects SET to an external resistor divider. The "T" in MAX6773BTASD2+T explicitly denotes 3.3V fixed output.
MAX6773BTASD2+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:
- 2.888V, 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)
MAX6773BTASD2+T FAQ
1.How can I place an order for MAX6773BTASD2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6773BTASD2+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 MAX6773BTASD2+T reliable?
The price and inventory of MAX6773BTASD2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6773BTASD2+T is usually 5 days.
3.What payment methods are accepted for MAX6773BTASD2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6773BTASD2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6773BTASD2+T?
MAX6773BTASD2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6773BTASD2+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 MAX6773BTASD2+T?
For technical support, including MAX6773BTASD2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6773BTASD2+T requirements.
6.How does Aetrix verify that MAX6773BTASD2+T is sourced from the original manufacturer or authorized distributors?
All MAX6773BTASD2+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 MAX6773BTASD2+T meets industry standards.
7.What is the process for return or replacement of MAX6773BTASD2+T?
All MAX6773BTASD2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6773BTASD2+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 MAX6773BTASD2+T part is unused and in its original packaging.
Return procedure for MAX6773BTASD2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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