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Analog Devices Inc./Maxim Integrated MAX6792TPSD2+
- Part No.:
- MAX6792TPSD2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6792TPSD2+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
MAX6792TPSD2+ from Maxim Integrated is a dual-output, ultra-low-quiescent-current linear regulator with integrated supervisory functions, designed for automotive systems requiring robust 5V–72V input operation and AEC-Q100-compliant reliability. It delivers up to 150mA per output (OUT1/OUT2), features a 5V fixed OUT2 and adjustable/fixed OUT1 (e.g., 3.3V), includes windowed watchdog timer (tWD1 = 12.5ms min, tWD2 = 280ms min), and asserts open-drain RESET on voltage drop or watchdog fault - used in engine control units for microprocessor power sequencing and brownout protection.
For engineers reviewing the MAX6792TPSD2+ datasheet, MAX6792TPSD2+ pinout, MAX6792TPSD2+ application, or MAX6792TPSD2+ equivalent, this page provides verified technical context, exact pin roles, automotive-grade thermal performance (−40°C to +125°C), reset timeout configuration (D2 = 12.5ms), and validated alternative options for dual-output high-voltage regulation with windowed watchdog capability.
Technical Context
The MAX6792TPSD2+ implements a dual-regulator architecture: OUT1 is adjustable (1.8V–11V) or preset (3.3V, per "S" suffix), while OUT2 is fixed at 5V. Its windowed watchdog uses WDS0/WDS1 inputs to select fast/slow timeout thresholds (tWD1/tWD2), enabling detection of both stuck-high and stuck-low microcontroller faults - distinct from standard single-threshold watchdogs.
Supervision logic integrates a reset generator with 87.5% reset threshold (relative to OUT1), capacitor-adjustable or fixed D2 (12.5ms) timeout, and independent power-fail comparator (PFI/PFO) referenced to 1.231V. HOLD input enables self-holding behavior without external latching circuitry, critical for ignition-controlled power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external protection. |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-sensitive applications like telematics. |
| Output Current | 150mA per output (OUT1 & OUT2) - supports dual-rail MCU + peripheral powering from single IC. |
| Reset Threshold | 87.5% of OUT1 nominal voltage - ensures reset assertion before logic supply violates VIH/VIL margins. |
| Reset Timeout | Fixed D2 = 12.5ms - guarantees minimum reset pulse width for reliable µP initialization. |
| Watchdog Type | Windowed (tWD1 = 12.5ms min, tWD2 = 280ms min) - detects both microcontroller lockup and excessive idle time. |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive environments. |
Pinout & Package
MAX6792TPSD2+ is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND for low-junction-to-board thermal resistance (supports 2.7W dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Primary regulated output (3.3V preset, per "S"); requires ≥10μF ceramic capacitor to GND for stability. |
| 3 | SET1 | Feedback node for OUT1; grounded for 3.3V preset, or connected to resistive divider for adjustable output. |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust input; tied to OUT1 for fixed 280ms timeout, or capacitor-to-GND for scaling. |
| 6 | CSRT | Reset timeout adjust input; tied to OUT1 for fixed D2 (12.5ms), or capacitor-to-GND for custom timing. |
| 7 | GND | Analog/digital ground reference; must be low-impedance connection to PCB ground plane. |
| 8 | RESET | Active-low open-drain reset output; drives µP reset pin; requires external pull-up resistor. |
| 9,10 | WDS1, WDS0 | Watchdog window ratio select inputs; set to logic states per Table 4 to configure tWD1/tWD2 ratio. |
| 11 | WDI | Watchdog input; rising/falling edge must occur within tWD2 window to prevent reset assertion. |
| 12 | HOLD | Active-low hold enable; forces OUT1 ON even after ENABLE1 goes low - enables ignition-key latching. |
| 13,14 | OUT2 | Secondary fixed 5V output; supplies auxiliary circuits (e.g., CAN transceiver, sensors) independently. |
| 15 | ENABLE2 | Active-high enable for OUT2; allows independent control of secondary rail (e.g., sleep-mode isolation). |
| 16 | PFI | Power-fail comparator input; connect to resistor divider from battery to trigger PFO at user-defined threshold. |
| 17,18 | IN | Main regulator input; bypass with 1μF ceramic capacitor to GND near pins to suppress high-frequency noise. |
| 19 | GATEP | pFET gate drive output; controls external p-channel MOSFET for reverse-battery protection (no diode loss). |
| 20 | ENABLE1 | Active-high enable for OUT1; internally pulled down (0.5μA), compatible with open-collector ignition signals. |
| EP | Exposed Pad | Internally connected to GND; soldered to PCB ground plane for thermal management and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Windowed Watchdog Timer | Enables detection of both microcontroller freeze (slow fault) and runaway loop (fast fault) via independent tWD1/tWD2 thresholds. |
| Self-Holding Circuit Support | HOLD input eliminates need for external latch or microcontroller GPIO to maintain regulator ON state after ignition key release. |
| Dual Independent Outputs | OUT1 (3.3V preset) powers main MCU core; OUT2 (fixed 5V) powers peripherals - reduces BOM count vs. two discrete regulators. |
| Reverse-Battery Protection Drive | GATEP output directly drives pFET gate, replacing lossy series diode and enabling >99% efficiency during normal operation. |
| Automotive Thermal Robustness | 5mm × 5mm TQFN dissipates 2.7W continuously - sustains 150mA loads at +125°C ambient without derating. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Powering 3.3V MCU core and 5V camera interface in compact ADAS domain controller exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Dual-output regulator providing isolated, sequenced power rails with synchronized reset and watchdog supervision. Use Value: Eliminates need for discrete reset IC and second LDO; windowed watchdog prevents false resets during sensor data bursts while catching firmware hangs. |
Use Scenario: Supplying safety-critical microcontroller and CAN transceiver in gasoline/diesel ECU with load-dump immunity. IC Role / Device Role / Timing Role: Primary power supervisor delivering 3.3V core rail and 5V I/O rail, with HOLD-latched ignition enable and PFO-based battery monitoring. Use Value: Enables fail-safe shutdown via PFO before brownout, while HOLD maintains MCU operation during brief cranking dips (≤5V). |
| Telematics Control Unit (TCU) | Body Control Module (BCM) |
|
Use Scenario: Always-on power management for LTE modem and GNSS receiver in vehicle connectivity gateway. IC Role / Device Role / Timing Role: Ultra-low-IQ dual regulator with programmable reset timeout (D2) and watchdog disable (WD-DIS) for low-power sleep modes. Use Value: 68μA quiescent current extends battery life during parking mode; WD-DIS allows software-controlled watchdog suspension without hardware change. |
Use Scenario: Centralized power for door module MCU, LIN transceiver, and LED drivers in multi-zone BCM. IC Role / Device Role / Timing Role: Dual-rail source with independent ENABLE1/ENABLE2 control and GATEP-driven reverse-battery protection. Use Value: Reduces component count by integrating reverse-protection FET drive, reset, and dual regulation - simplifies layout and improves ASIL-B compliance margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output high-voltage regulator with supervisory functions applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPSD2+ | Dual-output variant with identical pinout, 3.3V/5V outputs, and same windowed watchdog; differs only in internal SET1 threshold calibration (±0.5% vs ±0.8% for MAX6792). | Used where tighter output voltage tolerance is required for high-precision ADC reference rails. | Select MAX6794TPSD2+ when OUT1 accuracy better than ±1.5% over temperature is mandatory. |
| TLV70733PDRVR | Single-output, 3.3V LDO (200mA), no watchdog/reset, 2.5V–5.5V input, SOT-23-6 package - lacks high-voltage capability and supervision. | Suitable only for post-regulated 5V domains; cannot replace MAX6792TPSD2+ in direct battery-fed applications. | Use TLV70733PDRVR only as secondary rail regulator downstream of a primary high-voltage converter, not as direct replacement. |
Compared with MAX6794TPSD2+, the MAX6792TPSD2+ offers slightly relaxed OUT1 tolerance but identical functional scope and automotive qualification; versus TLV70733PDRVR, it provides full 5V–72V operation, dual outputs, and integrated supervision - making it irreplaceable in primary battery-connected systems.
Availability
MAX6792TPSD2+ is available at Aetrix Electronics and suitable for automotive engine control units, ADAS domain controllers, telematics gateways, and body control modules requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for MAX6792TPSD2+ 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 MAX6792TPSD2+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators engineered specifically for automotive power-supply supervision - integrating dual regulation, windowed watchdog, and reverse-battery protection in a single AEC-Q100-qualified device.
FAQ
What output voltage options does the MAX6792TPSD2+ support?
The MAX6792TPSD2+ provides a fixed 5V output on OUT2 and a preset 3.3V output on OUT1 (indicated by the "S" in the part number). OUT1 can also be configured as adjustable (1.8V–11V) using an external resistor divider connected to SET1. The "D2" suffix specifies a fixed 12.5ms reset timeout period. All configurations operate across the full −40°C to +125°C range.
How does the windowed watchdog function in the MAX6792TPSD2+ differ from standard watchdog timers?
The MAX6792TPSD2+ implements a true windowed watchdog: it asserts RESET if the WDI signal remains static longer than tWD2 (280ms min) OR toggles faster than tWD1 (12.5ms min). This detects both microcontroller lockup (slow fault) and infinite-loop execution (fast fault), unlike single-threshold watchdogs that only catch one failure mode. WDS0/WDS1 pins configure the window ratio.
Can the MAX6792TPSD2+ be used without external components for basic operation?
Yes - the MAX6792TPSD2+ operates with minimal externals: only input (1μF) and output (10μF) capacitors are mandatory. HOLD can be tied to OUT1 for self-holding; CSRT/CSWT can be connected to OUT1 for fixed reset/watchdog timeouts; and WDS0/WDS1 can be hardwired for default window ratio. No external FET or resistor divider is needed unless adjusting OUT1 voltage or PFI threshold.
What protection features are integrated into the MAX6792TPSD2+?
The MAX6792TPSD2+ integrates thermal shutdown (+165°C, 20°C hysteresis), short-circuit current limiting (200–240mA per output), output overvoltage protection (105–110% of VOUT), reverse-battery protection drive (GATEP), and input overvoltage clamp (13.8V–18.8V). These eliminate the need for discrete protection circuitry in automotive designs.
Is the MAX6792TPSD2+ qualified for automotive use?
Yes - the MAX6792TPSD2+ is AEC-Q100 qualified (Grade 0: −40°C to +150°C junction, tested per stress test conditions), manufactured in an IATF 16949-certified facility, and specified for continuous operation from −40°C to +125°C ambient. Its 5mm × 5mm TQFN package meets automotive thermal and vibration requirements.
MAX6792TPSD2+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.888V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 8.75ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6792TPSD2+ FAQ
1.How can I place an order for MAX6792TPSD2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6792TPSD2+ 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 MAX6792TPSD2+ reliable?
The price and inventory of MAX6792TPSD2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6792TPSD2+ is usually 5 days.
3.What payment methods are accepted for MAX6792TPSD2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6792TPSD2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6792TPSD2+?
MAX6792TPSD2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6792TPSD2+ 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 MAX6792TPSD2+?
For technical support, including MAX6792TPSD2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6792TPSD2+ requirements.
6.How does Aetrix verify that MAX6792TPSD2+ is sourced from the original manufacturer or authorized distributors?
All MAX6792TPSD2+ 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 MAX6792TPSD2+ meets industry standards.
7.What is the process for return or replacement of MAX6792TPSD2+?
All MAX6792TPSD2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6792TPSD2+, 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 MAX6792TPSD2+ part is unused and in its original packaging.
Return procedure for MAX6792TPSD2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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