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Analog Devices Inc./Maxim Integrated MAX6793TPWD0+
- Part No.:
- MAX6793TPWD0+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPWD0+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,553
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Product details
Overview
MAX6793TPWD0+ from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems requiring robust 5V–72V operation and ultra-low 68μA quiescent current. It delivers up to 150mA per output (OUT1/OUT2), features fixed 5V OUT2 and adjustable/fixed OUT1 (1.8V–5V), and includes RESET, watchdog, HOLD, and power-fail comparator functionality. Used in engine control units and body electronics where load-dump resilience and microcontroller supervision are critical.
For engineers reviewing the MAX6793TPWD0+ datasheet, MAX6793TPWD0+ pinout, MAX6793TPWD0+ application, or MAX6793TPWD0+ equivalent, key selection criteria include its dual-regulator architecture with independent ENABLE1/ENABLE2 control, 20-pin TQFN-EP package, fixed 5V + adjustable 1.8V–11V outputs, 280ms min watchdog timeout, and AEC-Q100-compliant thermal performance up to +125°C.
Technical Context
The MAX6793TPWD0+ implements two independent LDO regulators: OUT1 supports preset (1.8V/2.5V/3.3V/5V) or adjustable (1.8V–11V) output via SET1 feedback, while OUT2 is fixed at 5V. Its supervisory block integrates a push-pull/open-drain RESET output with 35μs–200ms selectable timeout, a capacitor-adjustable watchdog timer (CSWT), and WD-DIS input for hardware disable.
It uses internal 1.231V reference for PFI comparator and 124mV/62mV thresholds for Dual-Mode™ SET1, enabling precise output regulation and fault detection. Thermal shutdown triggers at +165°C with 20°C hysteresis, and reverse-battery protection is implemented via GATEP-driven pFET-no external diodes required.
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 functionality in battery-sensitive applications |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for MCU cores, CAN transceivers, and sensors |
| Dropout Voltage | 840mV typ at 100mA - ensures regulation under high VIN/low VOUT conditions (e.g., cold-crank) |
| Reset Threshold Accuracy | ±1.5% over -40°C to +125°C - guarantees reliable microcontroller reset during brownout |
| Watchdog Timeout | 280ms minimum (fixed) or capacitor-adjustable - configurable fault detection window for diverse firmware timing |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive environments |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced for 2.7W dissipation at high ambient |
Pinout & Package
MAX6793TPWD0+ is housed in a 20-pin thermally enhanced TQFN-EP (5mm × 5mm) with exposed pad (EP) connected internally to GND. The package supports up to 2.7W continuous power dissipation and requires PCB thermal vias to ground plane for optimal junction temperature control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Dual-mode regulator output: fixed (1.8V/2.5V/3.3V/5V) or adjustable (1.8V–11V) via SET1 divider |
| 3 | SET1 | Feedback node for OUT1; GND = preset voltage, resistive divider = adjustable output |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - used for early battery warning |
| 5 | CSWT | Watchdog timeout adjust: connect to OUT1 for fixed 280ms, or capacitor to GND for custom timeout |
| 6 | CSRT | Reset timeout adjust: connect to OUT1 for fixed 35μs/3.125ms/12.5ms/50ms/200ms options |
| 7 | GND | Analog/digital ground reference and thermal path via EP |
| 8 | RESET | Active-low push-pull or open-drain reset output; asserts on OUT1 undervoltage or watchdog fault |
| 9,10 | WDS1, WDS0 | Watchdog window ratio select inputs (MAX6791/MAX6792 only); unused on MAX6793TPWD0+ |
| 11 | WDI | Watchdog input - rising/falling edge must occur within timeout period to prevent RESET assertion |
| 12 | HOLD | Active-low hold enable: forces OUT1 ON even after ENABLE1 goes low - enables self-holding circuits |
| 13,14 | OUT2 | Fixed 5V output - dedicated supply for peripherals requiring stable rail independent of OUT1 |
| 15 | ENABLE2 | Active-high enable for OUT2 - allows independent control of second regulator |
| 16 | PFI | Power-fail comparator input - set threshold via resistor divider referenced to 1.231V internal reference |
| 17,18 | IN | Main regulator input - accepts 5V–72V; bypass with 1μF ceramic capacitor to GND |
| 19 | GATEP | pFET gate drive output - controls external p-channel MOSFET for reverse-battery protection |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5μA pulldown enables default OFF state |
| EP | Exposed Pad | Internally connected to GND - must be soldered to PCB ground plane for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | OUT1 (adjustable/fixed) + OUT2 (fixed 5V) - enables mixed-voltage system design with isolated enable control |
| HOLD input with self-hold logic | Eliminates need for external latch circuitry - simplifies ignition-controlled power sequencing in automotive modules |
| WD-DIS hardware watchdog disable | Dedicated pin (Pin 9 on MAX6793) allows deterministic watchdog deactivation without software intervention |
| Reverse-battery protection via GATEP | Drives external pFET to block reverse current - replaces lossy series diode, improving efficiency and thermal margin |
| Integrated power-fail comparator (PFI/PFO) | 1.231V precision reference enables accurate battery voltage monitoring down to ~6V with external divider |
| AEC-Q100 qualified variants available | MAX6793TPWD0+ shares qualification path with /V+ automotive-grade versions - supports functional safety analysis |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering 32-bit MCU, CAN transceiver, and analog sensors in under-hood environment subject to load-dump and cold-crank. IC Role / Device Role / Timing Role: Dual-regulator supervisor providing 5V for CAN PHY and 3.3V for MCU core, with RESET synchronized to OUT1 and watchdog monitoring firmware execution. Use Value: 72V input tolerance eliminates need for external TVS; 68μA IQ extends battery life in sleep mode; HOLD enables ignition-triggered latching without external components. |
Use Scenario: Supplying door module microcontroller, LIN transceiver, and LED drivers in door panel with shared battery rail. IC Role / Device Role / Timing Role: Primary power manager delivering regulated 5V (OUT2) to LIN PHY and adjustable 3.3V (OUT1) to MCU, with PFO signaling low-battery condition before shutdown. Use Value: Independent ENABLE2 allows selective powering of LIN bus; GATEP-driven pFET prevents reverse-current damage during jump-start; thermal shutdown protects against enclosure overheating. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Automotive Infotainment Power Sequencing |
|
Use Scenario: Powering image sensor, ISP, and video encoder in compact rear-view camera housing exposed to wide temperature swings. IC Role / Device Role / Timing Role: High-reliability dual LDO with RESET asserted on OUT1 dropout and watchdog timeout - ensures clean restart after transient faults. Use Value: 125°C rating enables operation near heat-generating SoC; 20-pin TQFN minimizes board area; CSRT/CSWT pins allow tuning reset/watchdog timing to match firmware boot sequence. |
Use Scenario: Managing power-up sequence for head unit SoC, audio codec, and display driver ICs requiring staggered voltage rails. IC Role / Device Role / Timing Role: Supervisor coordinating 5V (OUT2) and 1.8V (OUT1) delivery with programmable reset timeout and HOLD-based sequencing lock. Use Value: Adjustable OUT1 enables direct supply to low-voltage I/O domains; WD-DIS allows safe bootloader operation without watchdog interference; PFI monitors main 12V rail for graceful shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPWD0+ | Dual-output variant with identical pinout, specs, and features - differs only in watchdog configuration (no WD-DIS pin; uses WDS0/WDS1 instead) | Requires software-managed watchdog disable vs. hardware WD-DIS; less suitable for safety-critical reset isolation | Select MAX6794TPWD0+ only if windowed watchdog timing (tWD1/tWD2) is required and hardware disable is unnecessary |
| TLV70733PDQNR | Single-output 3.3V LDO (200mA), no supervisory features, 2.5V–5.5V input, SOT-23-5 package | Lacks RESET, watchdog, HOLD, PFI, reverse-battery protection - cannot replace full supervisory function set | Use only as supplemental low-IQ rail in non-automotive, low-voltage systems where MAX6793TPWD0+ features are unused |
Compared with MAX6794TPWD0+, MAX6793TPWD0+ offers hardware WD-DIS for deterministic watchdog disable - critical for bootloader and diagnostic modes. Compared with TLV70733PDQNR, it provides full automotive-grade supervision, 72V tolerance, and dual-rail capability - making it irreplaceable in safety-compliant vehicle ECUs.
Availability
MAX6793TPWD0+ is available at Aetrix Electronics and suitable for automotive engine control, body electronics, and ADAS camera modules requiring stable component supply across extended temperature and high-reliability automotive qualification requirements.
Supply support for MAX6793TPWD0+ 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 MAX6791–MAX6796 family was engineered specifically for automotive power-supply supervision - integrating high-voltage LDOs, RESET, watchdog, HOLD, and reverse-battery protection into a single AEC-Q100-aligned package.
FAQ
What output voltage options does the MAX6793TPWD0+ support?
The MAX6793TPWD0+ supports fixed output voltages of 1.8V, 2.5V, 3.3V, or 5.0V on OUT1, selected by grounding SET1. It also supports adjustable OUT1 from 1.8V to 11V using an external resistive divider. OUT2 is fixed at 5.0V. All options are factory-configured per ordering code - the "WD0" suffix indicates 5V OUT1 and 5V OUT2 with 35μs reset timeout and fixed 280ms watchdog timeout.
How does the HOLD function work on the MAX6793TPWD0+?
The HOLD input on the MAX6793TPWD0+ is active-low. When pulled low after ENABLE1 is asserted, it forces OUT1 to remain ON even if ENABLE1 later returns low - enabling self-holding behavior without external latches. Releasing HOLD (to high or open) shuts down OUT1. HOLD is internally pulled up to OUT1 with 2μA, so leaving it unconnected defaults to standard ENABLE1 control.
Does the MAX6793TPWD0+ include reverse-battery protection?
Yes, the MAX6793TPWD0+ includes integrated reverse-battery protection via the GATEP pin, which drives the gate of an external p-channel MOSFET. This eliminates the need for a series Schottky diode, reducing voltage drop and power loss. The internal clamp limits IN-to-GATEP voltage to 13.8V–18.8V, ensuring safe MOSFET gate drive across the 5V–72V input range.
What is the purpose of the WD-DIS pin on the MAX6793TPWD0+?
The WD-DIS pin (Pin 9) on the MAX6793TPWD0+ provides hardware-level disable of the watchdog timer. Driving WD-DIS low disables watchdog monitoring entirely - preventing unintended resets during bootloader execution or firmware updates. This differs from MAX6791/MAX6792, which require WDS0/WDS1 logic combinations for disable.
Is the MAX6793TPWD0+ qualified for automotive use?
The MAX6793TPWD0+ is not itself AEC-Q100 qualified, but it belongs to the MAX6791–MAX6796 family that includes AEC-Q100 qualified variants (e.g., MAX6793TPWD0/V+). Its specifications - including -40°C to +125°C operation, 72V input tolerance, and built-in protections - align with automotive requirements, and it shares the same die and package construction as qualified versions.
MAX6793TPWD0+ 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:
- 1.665V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35µs Typical
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPWD0+ FAQ
1.How can I place an order for MAX6793TPWD0+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPWD0+ 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 MAX6793TPWD0+ reliable?
The price and inventory of MAX6793TPWD0+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPWD0+ is usually 5 days.
3.What payment methods are accepted for MAX6793TPWD0+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPWD0+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPWD0+?
MAX6793TPWD0+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPWD0+ 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 MAX6793TPWD0+?
For technical support, including MAX6793TPWD0+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPWD0+ requirements.
6.How does Aetrix verify that MAX6793TPWD0+ is sourced from the original manufacturer or authorized distributors?
All MAX6793TPWD0+ 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 MAX6793TPWD0+ meets industry standards.
7.What is the process for return or replacement of MAX6793TPWD0+?
All MAX6793TPWD0+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPWD0+, 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 MAX6793TPWD0+ part is unused and in its original packaging.
Return procedure for MAX6793TPWD0+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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