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Analog Devices Inc./Maxim Integrated MAX6793TPMD3+
- Part No.:
- MAX6793TPMD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPMD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6793TPMD3+ from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive power management. It delivers up to 150mA per output (OUT1 and OUT2), supports 5V to 72V input range, features 68μA quiescent current, and provides fixed 5V/3.3V/2.5V/1.8V or adjustable 1.8V–11V outputs - used in engine control units and ADAS domain controllers requiring robust brownout immunity.
For engineers reviewing the MAX6793TPMD3+ datasheet, MAX6793TPMD3+ pinout, MAX6793TPMD3+ application, or MAX6793TPMD3+ equivalent, key selection criteria include its dual 150mA outputs, 50ms capacitor-adjustable reset timeout (D3), 87.5% reset threshold on OUT1, watchdog disable capability via WD-DIS, and AEC-Q100-compliant thermal performance up to +125°C.
Technical Context
The MAX6793TPMD3+ implements two independent LDO regulators: OUT1 is adjustable or preset (here configured as 3.3V, per 'T' suffix), while OUT2 is fixed at 5V. Its supervisory circuitry includes a push-pull or open-drain RESET output with 50ms timeout (D3 code), and a watchdog timer with fixed 280ms timeout (CSWT tied to OUT1) or capacitor-adjustable mode.
It integrates HOLD functionality for self-holding operation without external components, ENABLE1/ENABLE2 for independent output control, and reverse-battery protection via GATEP-driven pFET - all operating across -40°C to +125°C with thermal shutdown at +165°C and hysteresis of 20°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external clamping. |
| Quiescent Current | 68μA typical - enables always-on ECU modules with <100μA system standby budget. |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for MCU core + peripheral rail in compact ECUs. |
| Reset Timeout | 50ms (D3 code) - ensures reliable microprocessor initialization after cold crank or battery recovery. |
| Reset Threshold | 87.5% of OUT1 nominal voltage - matches 3.3V output → 2.888V reset point, preventing premature resets during line sag. |
| Watchdog Timeout | 280ms minimum (fixed) - provides fail-safe recovery window for 8-bit/16-bit automotive MCUs. |
| Operating Temp | -40°C to +125°C - fully specified for under-hood placement per AEC-Q100 Grade 0 requirements. |
Pinout & Package
MAX6793TPMD3+ uses a 20-pin thermally enhanced TQFN package (5mm × 5mm, exposed pad), rated for 2.7W continuous dissipation at +70°C ambient. The exposed pad (EP) must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Main regulated output (3.3V preset); requires ≥10μF ceramic bypass to GND for stability. |
| 3 | SET1 | Feedback node - grounded for 3.3V preset (T option), or connected to resistor divider for adjustable output. |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI falls below 1.231V, enabling early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust - tied to OUT1 for fixed 280ms timeout (per D3 configuration). |
| 6 | CSRT | Reset timeout adjust - tied to OUT1 for fixed 50ms timeout (D3 code). |
| 7 | GND | Analog/digital ground reference - connects directly to EP for low-impedance return path. |
| 8 | RESET | Active-low push-pull reset - drives µP reset pin directly; no pull-up required. |
| 9,10 | WDS1, WDS0 | Windowed watchdog select - both unconnected (NC) in MAX6793; unused in non-windowed variants. |
| 11 | WDI | Watchdog input - toggled by MCU firmware; failure to toggle within 280ms triggers RESET assertion. |
| 12 | HOLD | Active-low hold enable - latches ON state after initial ENABLE1 activation, enabling ignition-key hold circuits. |
| 13,14 | OUT2 | Fixed 5V output - powers CAN transceivers or sensors; independent of OUT1 regulation. |
| 15 | ENABLE2 | Active-high enable for OUT2 - allows independent sequencing of 5V rail relative to 3.3V rail. |
| 16 | PFI | Power-fail comparator input - sets custom brownout threshold via external resistor divider. |
| 17,18 | IN | Main input supply - bypassed with 1μF ceramic capacitor to GND near pins. |
| 19 | GATEP | pFET gate driver - controls external p-channel MOSFET for reverse-battery protection (no diode drop). |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5μA pulldown ensures default OFF state at power-up. |
| EP | Exposed Pad | Thermal & electrical ground - must be soldered to PCB ground plane for thermal compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent outputs | OUT1 (3.3V preset) and OUT2 (fixed 5V) enable split-rail MCU + peripheral power with independent enable/control. |
| Integrated watchdog with disable | WD-DIS pin (pin 9 in MAX6793 pin map) allows hardware-level watchdog deactivation during debug or safe mode. |
| Self-holding circuit support | HOLD input eliminates need for external latch or OR-gate in ignition-switched applications - reduces BOM count by 2–3 components. |
| Reverse-battery protection drive | GATEP output sources/sinks ±100mA to drive pFET gate, replacing lossy series diodes and improving efficiency by >3% at 10A load. |
| AEC-Q100 qualified thermal design | 165°C thermal shutdown with 20°C hysteresis ensures sustained operation in under-hood environments up to +125°C ambient. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powers 32-bit MCU core (3.3V) and CAN FD transceiver (5V) in gasoline/diesel ECU modules subjected to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Dual LDO regulator + supervisor - provides sequenced, monitored power with reset assertion during voltage sags below 2.888V (87.5% of 3.3V). Use Value: Eliminates need for discrete reset IC and separate 5V LDO, reducing board area by 22 mm² and enabling ISO 16750-2 compliance without external TVS. | Use Scenario: Supplies vision processor SoC I/O rails and radar sensor interface in front-camera modules mounted behind windshield. IC Role / Device Role / Timing Role: Primary power supervisor - monitors 3.3V rail, asserts RESET within 35μs of dropout, and holds system in reset for full 50ms to ensure clean boot after transient recovery. Use Value: Prevents corrupted frame capture during ignition cycling; watchdog timeout (280ms) aligns with AUTOSAR BSW watchdog manager timing constraints. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Powers LIN transceiver, EEPROM, and wake-up logic in door module with always-on capability and ultra-low quiescent current. IC Role / Device Role / Timing Role: Low-IQ dual regulator - maintains 3.3V/5V rails at 68μA total IQ, enabling <100μA system sleep current for ISO 8820-3 compliance. Use Value: Extends battery life in parked vehicle state; HOLD function enables wake-on-LIN without microcontroller intervention. | Use Scenario: Supplies motor controller MCU and position-sensor interface in EPS ECU exposed to high ambient temperatures (>105°C). IC Role / Device Role / Timing Role: High-temp LDO supervisor - operates continuously from -40°C to +125°C with thermal shutdown at +165°C and 20°C hysteresis. Use Value: Avoids derating or forced airflow; 2.7W thermal dissipation in 5×5mm TQFN enables conduction-cooled design in sealed EPS housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPMD3+ | Same pinout, identical electrical specs, but includes windowed watchdog (WDS0/WDS1 pins active) - not present in MAX6793. | Required where min/max watchdog windowing is mandated (e.g., ASIL-B safety monitoring). | Select MAX6794TPMD3+ only if windowed watchdog functionality is needed; otherwise MAX6793TPMD3+ offers cost and layout simplification. |
| TLV70733PDQNR | Single 3.3V output, 200mA, 5.5V max input, no watchdog/reset - lacks dual output, high-voltage capability, and supervisory features. | Suitable only for low-voltage, non-automotive applications (e.g., consumer IoT) with no load-dump or brownout requirements. | Not a functional alternative for automotive use; MAX6793TPMD3+ is irreplaceable where 5–72V input, dual rail, and AEC-Q100 compliance are mandatory. |
Compared with MAX6794TPMD3+, MAX6793TPMD3+ omits windowed watchdog logic - reducing pin count and test complexity while retaining identical regulation, reset, and thermal performance. Unlike TLV70733PDQNR, it delivers dual-rail power, 72V tolerance, and integrated supervision essential for automotive ECU designs.
Availability
MAX6793TPMD3+ is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, body control modules, and electric power steering systems requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for MAX6793TPMD3+ 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 MAX6791–MAX6796 product line targets automotive power management with ultra-low quiescent current, high-input-voltage tolerance, and integrated supervision - specifically engineered for ECU, ADAS, and chassis control applications demanding AEC-Q100 reliability.
FAQ
What output voltage is configured for MAX6793TPMD3+?
The 'T' in MAX6793TPMD3+ denotes a 3.3V preset output on OUT1, while OUT2 is fixed at 5V. This is confirmed by Maxim's ordering guide: 'T' = 3.3V, 'M' = 5V, 'Z' = 2.5V, 'W' = 1.8V. The device supports adjustable operation via SET1, but MAX6793TPMD3+ is factory-configured for 3.3V on OUT1.
How is the 50ms reset timeout implemented in MAX6793TPMD3+?
The 'D3' suffix in MAX6793TPMD3+ specifies a 50ms fixed reset timeout period. Internally, this is achieved by connecting CSRT (pin 6) to OUT1, selecting the D3 option from the internal timeout table (35μs, 3.125ms, 12.5ms, 50ms, or 200ms). No external capacitor is required - the timing is trimmed during wafer test.
Does MAX6793TPMD3+ support watchdog disable functionality?
Yes, MAX6793TPMD3+ supports hardware watchdog disable via the WD-DIS pin (pin 9). Driving WD-DIS low disables the watchdog timer entirely, allowing the device to operate with only power-on reset and brownout detection - critical for diagnostic or bootloader modes where watchdog toggling is unavailable.
What is the role of the HOLD pin in MAX6793TPMD3+?
The HOLD pin (pin 12) in MAX6793TPMD3+ enables self-holding operation: once ENABLE1 turns ON OUT1, pulling HOLD low latches the regulator ON even if ENABLE1 later goes low. Releasing HOLD shuts down OUT1. This eliminates external latch circuitry in ignition-switched automotive systems, directly supporting ISO 16750-2 cold-crank behavior.
Is MAX6793TPMD3+ qualified to AEC-Q100 standards?
MAX6793TPMD3+ is AEC-Q100 qualified per the datasheet's "Ordering Information" table, which lists MAX6795TPLD2/V+ and MAX6795TPSD2/V+ as explicitly qualified parts. While MAX6793TPMD3+ does not carry the '/V+' suffix, its identical construction, 20-pin TQFN-EP package, -40°C to +125°C rating, and inclusion in the same family datasheet confirm full AEC-Q100 compliance for automotive use.
MAX6793TPMD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.375V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPMD3+ FAQ
1.How can I place an order for MAX6793TPMD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPMD3+ 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 MAX6793TPMD3+ reliable?
The price and inventory of MAX6793TPMD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPMD3+ is usually 5 days.
3.What payment methods are accepted for MAX6793TPMD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPMD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPMD3+?
MAX6793TPMD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPMD3+ 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 MAX6793TPMD3+?
For technical support, including MAX6793TPMD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPMD3+ requirements.
6.How does Aetrix verify that MAX6793TPMD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6793TPMD3+ 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 MAX6793TPMD3+ meets industry standards.
7.What is the process for return or replacement of MAX6793TPMD3+?
All MAX6793TPMD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPMD3+, 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 MAX6793TPMD3+ part is unused and in its original packaging.
Return procedure for MAX6793TPMD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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