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Analog Devices Inc./Maxim Integrated MAX6792TPWD2+
- Part No.:
- MAX6792TPWD2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6792TPWD2+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,845
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Product details
Overview
MAX6792TPWD2+ from Maxim Integrated is a dual-output, ultra-low-quiescent-current linear regulator with integrated supervisory functions for automotive systems. It delivers up to 150mA per output (OUT1 and OUT2), supports 5V to 72V input range, features windowed watchdog timer (tWD1 = 50ms min / tWD2 = 280ms min), and operates across –40°C to +125°C. Used in engine control units to maintain stable 5V/3.3V rail power during load-dump transients.
For engineers reviewing the MAX6792TPWD2+ datasheet, MAX6792TPWD2+ pinout, MAX6792TPWD2+ application, or MAX6792TPWD2+ equivalent, key selection criteria include dual-rail supervision capability, AEC-Q100-compliant thermal robustness, fixed 5V OUT2 with adjustable OUT1, HOLD-enabled self-holding circuitry, and windowed watchdog timing with selectable ratio via WDS0/WDS1.
Technical Context
The MAX6792TPWD2+ implements two independent LDO regulators: OUT1 is adjustable (1.8V–11V) or preset (5V/3.3V/2.5V/1.8V) via SET1; OUT2 is fixed 5V. Both feature low dropout (840mV typ @100mA dual), thermal/short-circuit/overvoltage protection, and operate under 68μA quiescent current.
Its supervisory architecture includes a windowed watchdog (WDS0/WDS1-selectable ratios), active-low open-drain RESET with capacitor-adjustable timeout (D2 = 12.5ms), PFI/PFO comparator (1.231V threshold), and HOLD input enabling latch-up without external components - all fully specified over automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump events without shutdown |
| Quiescent Current | 68μA typ - enables always-on functionality in battery-sensitive systems |
| Output Current | 150mA per output - sufficient for MCU core + I/O rails in ECUs and body controllers |
| Dropout Voltage | 840mV typ @100mA (dual) - maintains regulation at high VIN/VOUT differentials |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive deployment |
| Reset Threshold Accuracy | ±1.5% over temp - ensures reliable brownout detection across full range |
| Watchdog Timeout | Windowed: tWD1 = 50ms min / tWD2 = 280ms min - detects both stuck-high and stuck-low faults |
Pinout & Package
MAX6792TPWD2+ uses a 20-pin thermally enhanced TQFN-EP package (5mm × 5mm, exposed pad). The exposed pad must be soldered to PCB ground plane for optimal thermal performance (2.7W dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | Adjustable (1.8V–11V) or preset (5V/3.3V/2.5V/1.8V); max 150mA; requires ≥10μF output cap |
| SET1 | OUT1 Feedback Input | Ground for preset voltage; external resistor divider for adjustable output |
| PFO | Power-Fail Comparator Output | Open-drain active-low signal triggered when PFI < 1.231V |
| CSWT | Watchdog Timeout Adjust | Connect to OUT1 for fixed 280ms timeout; capacitor to GND for adjustable period |
| CSRT | Reset Timeout Adjust | Connect to OUT1 for fixed 12.5ms (D2); capacitor to GND for user-defined delay |
| RESET | Supervisory Reset Output | Active-low open-drain; asserts when OUT1 drops below threshold or watchdog fault occurs |
| WDI | Watchdog Input | Edge-triggered; windowed timeout requires transitions within tWD1–tWD2 bounds |
| WDS0 / WDS1 | Watchdog Ratio Select | Logic inputs selecting fast/slow watchdog window ratio (e.g., 8×, 16×, 64×) |
| HOLD | Regulator Hold Control | Active-low; latches ON state even after ENABLE1 goes low - enables self-holding circuits |
| ENABLE1 / ENABLE2 | Independent Regulator Enables | Active-high; ENABLE1 controls OUT1, ENABLE2 controls fixed 5V OUT2 |
| OUT2 | Fixed 5V Output | Dedicated 5V rail; no adjustment; requires ≥10μF output cap |
| GATEP | pFET Gate Driver | Drives external p-channel MOSFET for reverse-battery protection |
| PFI | Power-Fail Input | Resistive-divider input referenced to internal 1.231V comparator threshold |
| IN | Main Power Input | Accepts 5V–72V; bypass with 1μF capacitor to GND |
| GND | Ground Reference | Common return for all circuits; connects to exposed pad |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Enables detection of both microprocessor lockup (slow fault) and spurious noise (fast fault) via WDS0/WDS1-selectable timing windows |
| HOLD input with internal 2µA pullup | Eliminates need for external latch circuitry - simplifies ignition-controlled power sequencing in automotive modules |
| Dual independent enable inputs | Allows separate control of 5V OUT2 and adjustable OUT1 - supports phased power-up of subsystems |
| Reverse-battery protection driver (GATEP) | Directly drives pFET gate to block reverse polarity without series diode drop or power loss |
| Integrated power-fail comparator (PFI/PFO) | Provides early warning of supply decay using programmable threshold - enables graceful system shutdown |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers MCU, CAN transceiver, and sensor interface circuits in gasoline/diesel engine compartments exposed to 12V/24V battery fluctuations and load-dump spikes. IC Role / Device Role / Timing Role: Dual-rail LDO supervisor providing regulated 5V (OUT2) and 3.3V (OUT1) while monitoring MCU health via windowed watchdog and asserting RESET on brownout. Use Value: 72V input tolerance and –40°C to +125°C operation ensure uninterrupted function during cranking, load dump, and under-hood thermal stress. |
Use Scenario: Supplies power to door module microcontrollers, LIN transceivers, and LED drivers in vehicle interior zones. IC Role / Device Role / Timing Role: Regulates 5V rail for logic and 3.3V rail for sensors; HOLD input enables ignition-switched latching without external components. Use Value: 68μA quiescent current minimizes battery drain during vehicle sleep mode; PFI input triggers orderly shutdown before battery depletion. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Telematics Control Unit (TCU) |
Use Scenario: Powers image signal processor (ISP) and serializer in rear-view or surround-view camera modules mounted near bumpers. IC Role / Device Role / Timing Role: Delivers clean, low-noise 3.3V supply to ISP; RESET output synchronizes ISP boot with main SoC; watchdog guards against firmware hang. Use Value: Low dropout (840mV @100mA) preserves headroom during cold-cranking (6V battery); thermal shutdown protects against enclosure overheating. |
Use Scenario: Provides primary 5V rail and auxiliary 3.3V rail for cellular modem, GNSS receiver, and secure element in connected vehicle gateways. IC Role / Device Role / Timing Role: Supervises modem power-up sequence; CSRT-adjustable reset timeout accommodates variable boot times across firmware versions. Use Value: GATEP-driven reverse-battery protection eliminates need for bulky series diodes - critical for compact TCU PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPWD2+ | Dual-output like MAX6792TPWD2+, but supports same preset voltages and identical pinout; differs only in RESET output type (push-pull vs. open-drain in MAX6792) | Push-pull RESET provides higher drive strength for direct µP reset input without pullup; open-drain allows wired-OR with other supervisors | Select MAX6794TPWD2+ if µP reset pin requires active-pullup capability; otherwise MAX6792TPWD2+ offers greater flexibility in shared reset bus designs |
| TLV70733PDPWR | Single-output 3.3V LDO only (no watchdog, no RESET, no second rail); 200mA output; 1.8V–5.5V input; not AEC-Q100 qualified | Lacks supervision, dual-rail, and automotive qualification - suitable only for non-safety-critical infotainment peripherals | Not a functional substitute; use only for cost-sensitive, non-automotive applications where supervision and wide VIN are unnecessary |
Compared with MAX6794TPWD2+, MAX6792TPWD2+ offers open-drain RESET for bus sharing and identical dual-rail supervision, while TLV70733PDPWR lacks all supervisory features and automotive qualification - making it unsuitable for ECU or BCM deployment.
Availability
MAX6792TPWD2+ is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera ECUs, and telematics control units requiring stable component supply under extended temperature and high-reliability conditions.
Supply support for MAX6792TPWD2+ 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 MAX6792TPWD2+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators with integrated supervision - engineered specifically for automotive systems needing robust power sequencing, fault detection, and load-dump resilience.
FAQ
What output voltage options does the MAX6792TPWD2+ support?
The MAX6792TPWD2+ supports preset output voltages of 5V, 3.3V, 2.5V, or 1.8V on OUT1, and a fixed 5V on OUT2. OUT1 can also be adjusted from 1.8V to 11V using an external resistive divider connected to SET1. The MAX6792TPWD2+ datasheet specifies output accuracy of ±1.5% over temperature for all preset options.
Does the MAX6792TPWD2+ meet automotive qualification standards?
Yes, the MAX6792TPWD2+ is AEC-Q100 qualified (Grade 0: –40°C to +125°C) and designed for automotive under-hood applications. Its 72V input rating, thermal shutdown (+165°C), and guaranteed operation across the full temperature range confirm compliance with automotive reliability requirements.
How does the windowed watchdog timer in the MAX6792TPWD2+ differ from standard watchdogs?
The MAX6792TPWD2+ implements a true windowed watchdog: it asserts RESET if the WDI signal remains static longer than tWD2 (280ms min) OR toggles faster than tWD1 (50ms min). This detects both processor lockup (slow fault) and clock noise/glitching (fast fault), unlike single-timeout watchdogs. WDS0/WDS1 pins select the window ratio.
Can the MAX6792TPWD2+ be used without external capacitors?
No. The MAX6792TPWD2+ requires minimum 1μF ceramic capacitor from IN to GND and ≥10μF from each output (OUT1 and OUT2) to GND for stability and transient response. Omitting these violates absolute maximum ratings and risks oscillation or thermal shutdown during load steps.
What is the function of the HOLD pin on the MAX6792TPWD2+?
The HOLD pin on the MAX6792TPWD2+ is an active-low input that latches the regulator ON state. Once enabled, pulling HOLD low keeps OUT1/OUT2 active even if ENABLE1/ENABLE2 is subsequently deasserted. Releasing HOLD shuts down the outputs - enabling self-holding ignition circuits without external components.
MAX6792TPWD2+ 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:
- 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)
MAX6792TPWD2+ FAQ
1.How can I place an order for MAX6792TPWD2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6792TPWD2+ 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 MAX6792TPWD2+ reliable?
The price and inventory of MAX6792TPWD2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6792TPWD2+ is usually 5 days.
3.What payment methods are accepted for MAX6792TPWD2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6792TPWD2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6792TPWD2+?
MAX6792TPWD2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6792TPWD2+ 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 MAX6792TPWD2+?
For technical support, including MAX6792TPWD2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6792TPWD2+ requirements.
6.How does Aetrix verify that MAX6792TPWD2+ is sourced from the original manufacturer or authorized distributors?
All MAX6792TPWD2+ 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 MAX6792TPWD2+ meets industry standards.
7.What is the process for return or replacement of MAX6792TPWD2+?
All MAX6792TPWD2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6792TPWD2+, 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 MAX6792TPWD2+ part is unused and in its original packaging.
Return procedure for MAX6792TPWD2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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