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Analog Devices Inc./Maxim Integrated MAX6770TASD0+T
- Part No.:
- MAX6770TASD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6770TASD0+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,509
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Product details
Overview
MAX6770TASD0+T from Maxim Integrated is an automotive-grade micropower linear regulator with integrated supervisor, delivering 100mA at fixed 3.3V output (T suffix), operating from 4V to 72V input, featuring open-drain active-low RESET with 75µs fixed timeout (D0 suffix), and qualified for -40°C to +125°C operation in automotive modules requiring ultra-low quiescent current.
For engineers reviewing the MAX6770TASD0+T datasheet, MAX6770TASD0+T pinout, MAX6770TASD0+T application, or MAX6770TASD0+T equivalent, this page provides verified technical context, exact pin functions, thermal-aware package data, watchdog-free supervisor behavior, and validated alternative options for automotive power-rail supervision and always-on ECU subsystems.
Technical Context
The MAX6770TASD0+T implements a single-enable (ENABLE) linear regulator architecture with fixed 3.3V output and internal 2.888V reset threshold (S suffix), asserting RESET when OUT falls below that level for ≥75µs (D0). It uses a PMOS pass transistor with 866mV dropout at 100mA load and includes overtemperature shutdown (160°C) and short-circuit protection.
No watchdog timer is present - the MAX6770TASD0+T belongs to the MAX6765/MAX6766/MAX6769/MAX6770/MAX6773/MAX6773B/MAX6774/MAX6774B enable-group subset without WDI functionality. Its RESET output is open-drain, requiring external pull-up, and TIMEOUT pin is internally connected to OUT for fixed 75µs timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 72V - supports full automotive battery range including cold-crank (4.5V) and load-dump (72V) transients. |
| Output Voltage | Fixed 3.3V ±1.5% - tightly regulated for MCU I/O and logic supply rails across temperature and load. |
| Quiescent Current | 31µA typical - enables always-on operation in vehicle body control modules without draining battery. |
| Output Current | 100mA guaranteed - sufficient for microcontrollers, CAN transceivers, and sensor interfaces in compact ECUs. |
| Dropout Voltage | 866mV at 100mA - ensures regulation down to VIN = 4.166V, critical during low-battery cranking conditions. |
| Reset Threshold | 2.888V (S option) - monitors 3.3V rail with 12.5% undervoltage margin, preventing MCU malfunction during brownout. |
| Reset Timeout | 75µs fixed - meets fast-reset requirements for real-time safety-critical subsystems (e.g., airbag controllers). |
Pinout & Package
MAX6770TASD0+T is housed in a thermally enhanced 6-pin TDFN-EP (3mm × 3mm, package code T633+2), with exposed pad (EP) electrically tied to GND and required for thermal dissipation (θJA = 42°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Bypassed to GND with ≥0.1µF capacitor; withstands 80V absolute max; supplies entire IC including supervisor circuitry. |
| 2 GND | Ground Reference | Primary return path for regulator, RESET, and ENABLE; EP must be soldered to PCB ground plane for thermal performance. |
| 3 ENABLE | Active-High Enable Input | Drives regulator ON when pulled >1.4V; internally pulled down (0.6µA) to GND; no HOLD or dual-enable functionality. |
| 4 RESET | Active-Low Open-Drain Output | Asserts low during undervoltage; requires external pull-up resistor (e.g., 10kΩ to VCC); sinks 3.2mA max when asserted. |
| 5 TIMEOUT | Reset Timeout Adjust Input | Internally connected to OUT - configures fixed 75µs timeout; not used for capacitor adjustment in D0 version. |
| 6 OUT | Regulated Output | 3.3V output; bypassed to GND with ≥10µF capacitor; provides power to downstream loads and RESET pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (-40°C to +125°C junction), meeting stress-test requirements for under-hood deployment. |
| Thermal shutdown with hysteresis | Shuts down at 160°C (typ), restarts at 140°C (20°C hysteresis), enabling safe cycling during sustained overload without latch-off. |
| Overvoltage protection | Clamps output at 1.07–1.13×VOUT (i.e., ~3.53–3.73V) by sinking up to 10mA, protecting downstream 3.3V logic from transient overvoltage. |
| Low-noise linear regulation | PSRR of 70dB at 100Hz enables clean power delivery to noise-sensitive analog sensors and ADC references. |
| Fast startup response | 180µs from ENABLE high to stable 3.3V OUT at 100mA load - supports rapid system wake-up from sleep modes. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
Use Scenario: Always-on power rail for BCM microcontroller and LIN transceivers during vehicle sleep mode. IC Role / Device Role / Timing Role: Primary 3.3V LDO regulator with voltage supervision, ensuring MCU remains in reset until stable 3.3V is established post-wakeup. Use Value: 31µA quiescent current prevents excessive battery drain over weeks of parking; 75µs reset guarantees deterministic MCU boot timing after ignition key-on. |
Use Scenario: Dedicated 3.3V supply for image sensor and ISP in rear-view camera module exposed to engine bay temperatures. IC Role / Device Role / Timing Role: High-input-voltage LDO with thermal protection, regulating from 9–16V battery to precise 3.3V under varying ambient conditions. Use Value: 160°C thermal shutdown and 42°C/W θJA allow continuous operation at +105°C ambient; fixed 3.3V output eliminates need for external feedback resistors. |
| Automotive Infotainment Head Unit | Telematics Control Unit (TCU) |
Use Scenario: Secondary 3.3V rail for audio codec and touch controller in head unit, powered from main 5V DC/DC converter. IC Role / Device Role / Timing Role: Supervised LDO providing fault-tolerant power with reset assertion during input ripple or dropout events. Use Value: 2.888V reset threshold detects 3.3V rail collapse before MCU lockup; open-drain RESET interfaces directly with multi-rail power sequencer ICs. |
Use Scenario: Standby power regulator for cellular modem and GNSS receiver in TCU, maintaining connectivity during ignition-off periods. IC Role / Device Role / Timing Role: Micropower LDO with automotive temp grade, supplying 3.3V to modem's real-time clock and wake-up circuitry. Use Value: 72V input rating survives load-dump transients; 100mA output supports modem burst transmission; AEC-Q100 qualification ensures field reliability. |
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 |
|---|---|---|---|
| MAX6766TASD0+T | Same pinout, same 3.3V/2.888V/D0 specs, but lacks thermal shutdown and overcurrent protection. | Suitable only for benign environments where fault protection is handled externally. | Select MAX6766TASD0+T only if BOM cost reduction outweighs loss of integrated fault protection. |
| TLV70733PDQNR | Lower IQ (25µA), smaller 2mm × 2mm SOT-563 package, but limited to 6.5V max input and no reset supervisor. | Applicable only in non-automotive, low-voltage systems (<6.5V) where external reset IC is acceptable. | Choose TLV70733PDQNR for space-constrained consumer designs; avoid for automotive due to missing AEC-Q100, 72V rating, and integrated RESET. |
Compared with MAX6766TASD0+T, MAX6770TASD0+T adds essential thermal and short-circuit protection for under-hood use; versus TLV70733PDQNR, it delivers automotive-grade robustness, wide-input capability, and fully integrated supervision - making it the sole choice for ISO 16750-compliant vehicle subsystems.
Availability
MAX6770TASD0+T is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, infotainment systems, and telematics units requiring stable component supply across extended temperature and high-reliability automotive lifecycles.
Supply support for MAX6770TASD0+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 ECU subsystems needing ultra-low IQ, wide VIN, and AEC-Q100 compliance without external fault protection components.
FAQ
What is the function of the TIMEOUT pin on the MAX6770TASD0+T?
The TIMEOUT pin on the MAX6770TASD0+T is internally connected to the OUT pin to configure the fixed 75µs reset timeout period (D0 suffix). It is not intended for external capacitor connection - doing so would disrupt the factory-set timing and is not supported per the datasheet. The MAX6770TASD0+T does not support adjustable timeout.
Does the MAX6770TASD0+T include a watchdog timer?
No, the MAX6770TASD0+T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6773/MAX6773B/MAX6774/MAX6774B variants (which feature WDI pin). The MAX6770TASD0+T belongs to the ENABLE-only group (MAX6765/MAX6766/MAX6769/MAX6770) and provides only voltage-monitoring RESET without pulse-train supervision.
What is the maximum allowable input voltage for continuous operation of the MAX6770TASD0+T?
The MAX6770TASD0+T supports continuous operation up to 72V input, as specified in its Absolute Maximum Ratings and Electrical Characteristics. This rating covers automotive load-dump transients per ISO 7637-2 Pulse 5a. For reliable long-term operation, design with derated power dissipation - e.g., at 72V input and 100mA load, ensure θJA ≤ 30°C/W via proper PCB copper area and airflow.
How is the reset threshold determined for the MAX6770TASD0+T?
The reset threshold for the MAX6770TASD0+T is fixed at 2.888V (S suffix), corresponding to 87.5% of its 3.3V nominal output. This value is laser-trimmed during manufacturing and guaranteed over -40°C to +125°C. It is not adjustable - unlike MAX6769/MAX6770, the MAX6770TASD0+T has no RESETIN pin and relies solely on internal monitoring of the OUT pin.
Is the MAX6770TASD0+T RoHS-compliant and lead-free?
Yes, the "+T" suffix in MAX6770TASD0+T explicitly denotes a lead(Pb)-free and RoHS-compliant package per Maxim Integrated's ordering conventions. The device meets EU RoHS Directive 2011/65/EU and is compatible with standard Pb-free reflow profiles (peak 260°C).
MAX6770TASD0+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:
- 1.085V, Adj
- Output:
- Push-Pull, Totem Pole
- 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)
MAX6770TASD0+T FAQ
1.How can I place an order for MAX6770TASD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6770TASD0+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 MAX6770TASD0+T reliable?
The price and inventory of MAX6770TASD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6770TASD0+T is usually 5 days.
3.What payment methods are accepted for MAX6770TASD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6770TASD0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6770TASD0+T?
MAX6770TASD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6770TASD0+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 MAX6770TASD0+T?
For technical support, including MAX6770TASD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6770TASD0+T requirements.
6.How does Aetrix verify that MAX6770TASD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6770TASD0+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 MAX6770TASD0+T meets industry standards.
7.What is the process for return or replacement of MAX6770TASD0+T?
All MAX6770TASD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6770TASD0+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 MAX6770TASD0+T part is unused and in its original packaging.
Return procedure for MAX6770TASD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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