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Analog Devices Inc./Maxim Integrated MAX6793TPLD3+
- Part No.:
- MAX6793TPLD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPLD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
The MAX6793TPLD3+ 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 fixed 5V OUT2), operates from 5V to 72V input, consumes only 68μA quiescent current, and features a capacitor-adjustable 50ms reset timeout (D3) and push-pull RESET output - used in engine control units to maintain microprocessor reliability during load-dump transients.
For engineers reviewing the MAX6793TPLD3+ datasheet, MAX6793TPLD3+ pinout, MAX6793TPLD3+ application, or MAX6793TPLD3+ equivalent, key selection criteria include its dual-regulator architecture with independent ENABLE1/ENABLE2 control, HOLD input for self-holding circuit implementation, watchdog disable capability via WD-DIS, and AEC-Q100-compatibility support confirmed by /V+ suffix and -40°C to +125°C operation.
Technical Context
The MAX6793TPLD3+ 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 at 5V. Its supervisory block includes a push-pull RESET output with 92.5% reset threshold (relative to OUT1), 50ms timeout (D3 code), and a fixed 280ms watchdog timeout (CSWT = OUT1).
It supports reverse-battery protection via GATEP-driven pFET, thermal shutdown at +165°C with 20°C hysteresis, and power-fail detection using PFI/PFO with 1.231V internal reference. The HOLD input enables latch-up behavior without external components, while WD-DIS provides hardware-level watchdog disable - distinguishing it from MAX6791/MAX6792 windowed-watchdog variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump surges without external clamping. |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-sensitive systems like telematics. |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for dual-rail MCU + peripheral powering. |
| Reset Timeout | 50ms (D3 code) - ensures reliable µP reset hold time after brownout recovery. |
| Dropout Voltage | 840mV typical at 100mA (dual mode) - maintains regulation under low VIN conditions (e.g., cold-crank at 6V). |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive environments. |
| Reset Threshold | 92.5% of OUT1 nominal voltage - provides accurate undervoltage detection aligned with regulated rail. |
Pinout & Package
MAX6793TPLD3+ uses a 20-pin thermally enhanced TQFN package (5mm × 5mm, exposed pad), rated for 2.7W power dissipation and optimized for high-ambient automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT1 | Main adjustable or preset regulator output (150mA max); requires ≥10μF output capacitor. |
| 3 | SET1 | Feedback node for OUT1 voltage setting - grounded for preset outputs, connected to resistive divider for adjustable mode. |
| 4 | PFO | Active-low open-drain power-fail output - asserts when PFI falls below 1.231V, enabling early shutdown warnings. |
| 5 | CSWT | Watchdog timeout adjust input - tied to OUT1 for fixed 280ms timeout (as in MAX6793TPLD3+). |
| 6 | CSRT | Reset timeout adjust input - tied to OUT1 for fixed 50ms timeout (D3 code). |
| 7 | GND | Power and signal reference ground - connects to exposed pad for thermal conduction. |
| 8 | RESET | Active-low push-pull reset output - drives µP reset pin directly without pull-up resistor. |
| 9, 10 | WDS1, WDS0 | Watchdog logic select inputs - unused in MAX6793 (N.C. per pin table); WD-DIS used instead. |
| 11 | WDI | Watchdog input - requires toggling within 280ms to prevent reset assertion. |
| 12 | HOLD | Active-low hold input - latches regulator ON after initial enable, enabling ignition-key-based self-hold circuits. |
| 13, 14 | OUT2 | Fixed 5V secondary output (150mA max) - powers auxiliary circuits independently of OUT1. |
| 15 | ENABLE2 | Active-high enable for OUT2 - allows independent control of secondary rail. |
| 16 | PFI | Power-fail comparator input - sets custom brownout threshold via external resistor divider referenced to 1.231V. |
| 17, 18 | IN | Main regulator input - bypassed with 1μF capacitor; accepts 5V–72V supply. |
| 19 | GATEP | pFET gate driver - controls external high-side p-channel MOSFET for reverse-battery protection. |
| 20 | ENABLE1 | Active-high enable for OUT1 - internally pulled down; initiates regulator startup when driven high. |
| EP | Exposed Pad | Thermal pad connected to GND - must be soldered to PCB ground plane for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | OUT1 (adjustable/preset) + fixed 5V OUT2 - enables split-rail power for MCU + CAN transceiver. |
| Hardware watchdog disable | WD-DIS pin allows deterministic deactivation of watchdog function - critical for debug and safety-critical boot sequences. |
| Self-holding circuit support | HOLD input eliminates need for external latch components - simplifies ignition-switched power architecture. |
| Reverse-battery protection drive | GATEP output drives pFET gate directly - replaces lossy series diode, improving efficiency and thermal margin. |
| Automotive-grade supervision | Push-pull RESET, 50ms D3 timeout, and -40°C to +125°C operation meet ASIL-B system requirements. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Powers 3.3V MCU core and 5V image sensor interface in under-hood ECU exposed to 72V load-dump events. IC Role / Device Role / Timing Role: Dual-output LDO with HOLD-latched startup and RESET supervision ensures deterministic boot and brownout recovery. Use Value: 68μA quiescent current prevents battery drain during vehicle sleep; 72V input range eliminates need for front-end TVS clamping. |
Use Scenario: Supplies 1.8V image processor and 5V serializer in compact ADAS camera housing with limited airflow. IC Role / Device Role / Timing Role: Regulator + watchdog + PFI comparator provides fault-aware power sequencing and early warning before power collapse. Use Value: Thermal-enhanced TQFN sustains 150mA loads at +105°C ambient; PFI input enables graceful shutdown before sensor data corruption. |
| Body Control Module (BCM) | Infotainment Head Unit Power Management |
Use Scenario: Delivers 5V for LIN transceivers and 3.3V for microcontroller in door module with intermittent battery connection. IC Role / Device Role / Timing Role: ENABLE2-controlled OUT2 powers peripherals only when needed; HOLD maintains ON state across brief ignition glitches. Use Value: Dual enable inputs reduce system-level power gating complexity; 20°C thermal hysteresis prevents cycling near shutdown threshold. |
Use Scenario: Provides primary 5V rail and backup 3.3V rail for SoC and display controller in head unit with wake-on-CAN capability. IC Role / Device Role / Timing Role: WD-DIS pin disables watchdog during firmware updates; RESET output synchronizes SoC reset with power stabilization. Use Value: 50ms D3 reset timeout meets Intel/ARM SoC minimum reset pulse width requirements; GATEP enables reverse-polarity protection without diode drop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPLD3+ | Same pinout, identical electrical specs, but includes windowed watchdog (WDS0/WDS1) instead of WD-DIS. | Required where min/max watchdog timing windows are mandated (e.g., ISO 26262 ASIL-C diagnostics). | Select MAX6794TPLD3+ only if windowed watchdog functionality is required; MAX6793TPLD3+ is preferred for simpler watchdog disable use cases. |
| TPS7B8750QKVURQ1 | Single-output (5V only), 500mA, 35μA IQ, no HOLD or WD-DIS; uses different pinout and lacks OUT2. | Suitable for cost-sensitive single-rail applications without dual-output or self-hold needs. | Choose TPS7B8750QKVURQ1 only when secondary 5V rail and HOLD functionality are unnecessary - not a drop-in replacement. |
Compared with MAX6794TPLD3+, the MAX6793TPLD3+ trades windowed watchdog flexibility for simplified watchdog disable via WD-DIS; compared with TPS7B8750QKVURQ1, it adds dual-rail capability and latch-up control at higher BOM cost and pin count.
Availability
MAX6793TPLD3+ is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera modules, body control modules, and infotainment head units requiring stable component supply across extended temperature and high-reliability automotive qualification.
Supply support for MAX6793TPLD3+ 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 and automotive applications.
The MAX6793TPLD3+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators with integrated supervision - engineered specifically for automotive subsystems needing robust power sequencing, fault monitoring, and load-dump resilience.
FAQ
What output voltage options does the MAX6793TPLD3+ support?
The MAX6793TPLD3+ 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 "L" in the part number indicates a 5V preset for OUT1, confirmed by the D3 reset timeout code and /V+ automotive qualification.
How is the 50ms reset timeout implemented in the MAX6793TPLD3+?
The MAX6793TPLD3+ achieves its 50ms reset timeout (D3 code) by connecting the CSRT pin to OUT1, selecting the internally fixed timeout value. This configuration ensures RESET remains asserted for exactly 50ms after OUT1 recovers above its 92.5% reset threshold - meeting stringent automotive microprocessor reset timing requirements without external timing components.
Does the MAX6793TPLD3+ support reverse-battery protection?
Yes, the MAX6793TPLD3+ integrates reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. When battery polarity is reversed, the device disables the pFET to block current flow - eliminating the power loss and heat generation associated with series Schottky diodes while maintaining full 72V surge tolerance.
What is the function of the WD-DIS pin on the MAX6793TPLD3+?
The WD-DIS pin on the MAX6793TPLD3+ provides hardware-level watchdog disable: driving it low disables the watchdog timer entirely, preventing unintended resets during firmware updates or diagnostic modes. Unlike WDS0/WDS1 on MAX6791/MAX6792, WD-DIS offers binary enable/disable control - a key differentiator for safety-critical boot sequences requiring deterministic watchdog behavior.
Is the MAX6793TPLD3+ qualified for automotive use?
Yes, the MAX6793TPLD3+ is automotive-qualified, indicated by the "/V+" suffix in its ordering code. It is fully specified from -40°C to +125°C, includes thermal shutdown with hysteresis, short-circuit protection, and AEC-Q100 stress testing - making it suitable for under-hood and cabin applications including ECUs, ADAS, and body control modules.
MAX6793TPLD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.625V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPLD3+ FAQ
1.How can I place an order for MAX6793TPLD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPLD3+ 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 MAX6793TPLD3+ reliable?
The price and inventory of MAX6793TPLD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPLD3+ is usually 5 days.
3.What payment methods are accepted for MAX6793TPLD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPLD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPLD3+?
MAX6793TPLD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPLD3+ 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 MAX6793TPLD3+?
For technical support, including MAX6793TPLD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPLD3+ requirements.
6.How does Aetrix verify that MAX6793TPLD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6793TPLD3+ 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 MAX6793TPLD3+ meets industry standards.
7.What is the process for return or replacement of MAX6793TPLD3+?
All MAX6793TPLD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPLD3+, 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 MAX6793TPLD3+ part is unused and in its original packaging.
Return procedure for MAX6793TPLD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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