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Analog Devices Inc./Maxim Integrated MAX6793TPLD3+T
- Part No.:
- MAX6793TPLD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPLD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,712
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Product details
Overview
MAX6793TPLD3+T 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 fixed 5V OUT2 and adjustable/fixed OUT1 (e.g., 3.3V), and includes active-low RESET with 50ms timeout - enabling robust microcontroller reset control in load-dump-prone environments.
For engineers reviewing the MAX6793TPLD3+T datasheet, MAX6793TPLD3+T pinout, MAX6793TPLD3+T application, or MAX6793TPLD3+T equivalent, key selection criteria include its dual-regulator architecture, HOLD/ENABLE1/ENABLE2 independent control logic, watchdog disable capability via WD-DIS, thermal protection up to +125°C, and AEC-Q100-compliant operation in harsh automotive ambient conditions.
Technical Context
The MAX6793TPLD3+T implements two independent LDO regulators: OUT1 (adjustable or preset voltage) and fixed 5V OUT2, each with dedicated enable inputs (ENABLE1 and ENABLE2). Its supervisory circuitry integrates a capacitor-adjustable RESET timeout (D3 = 50ms nominal), fixed 280ms watchdog timeout (CSWT = OUT1), and WD-DIS pin for hardware watchdog disable - distinct from windowed watchdog variants in MAX6791/MAX6792.
It uses internal SET1 feedback for OUT1 regulation, supports reverse-battery protection via GATEP-driven pFET, and incorporates thermal shutdown (+165°C), short-circuit current limiting (~240mA), and output overvoltage protection (105–110% VOUT). The device operates across -40°C to +125°C with 68μA quiescent current at no load.
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 battery monitoring in sleep-mode vehicle systems |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for MCU core + peripheral rail in body control modules |
| Reset Timeout | 50ms (D3 option) - ensures reliable µP initialization after brownout recovery |
| Watchdog Timeout | 280ms fixed (CSWT = OUT1) - provides fail-safe reset if firmware hangs longer than threshold |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive placement |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced for 2.7W dissipation at high ambient |
Pinout & Package
MAX6793TPLD3+T is housed in a 20-pin thermally enhanced TQFN package (5mm × 5mm, exposed pad), optimized for high-power dissipation in compact automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | Adjustable (1.8V–11V) or preset (3.3V/5V/2.5V/1.8V); max 150mA - primary system rail for MCU or sensor interface |
| SET1 | Feedback Input | Connect to GND for preset voltage; external resistor divider for adjustable output - enables flexible voltage scaling |
| PFO | Power-Fail Comparator Output | Open-drain active-low signal triggered when PFI < 1.231V - used for early battery low-warning or graceful shutdown |
| CSRT | Reset Timeout Adjust | Connect to OUT1 for fixed 50ms timeout (D3); capacitor to GND for user-defined delay - eliminates external timing components |
| GND | Ground Reference | Common return path for all analog/digital circuits; exposed pad must be soldered to PCB ground plane for thermal performance |
| RESET | Supervisory Reset Output | Active-low push-pull or open-drain; asserts during OUT1 undervoltage or watchdog fault - directly drives µP reset pin |
| WDI | Watchdog Input | Falling/rising edge resets watchdog timer; no toggle within 280ms triggers RESET - monitors firmware liveness |
| WD-DIS | Watchdog Disable | Low = watchdog disabled; high or connected to OUT1 = enabled - allows safe debug mode or boot-time disable |
| HOLD | Regulator Hold Control | Active-low; forces OUT1 ON even if ENABLE1 goes low - enables self-holding ignition circuit without external latch |
| ENABLE1 / ENABLE2 | Independent Regulator Enables | Active-high; ENABLE1 controls OUT1, ENABLE2 controls fixed 5V OUT2 - supports staggered power sequencing |
| OUT2 | Fixed 5V Output | Dedicated 5V rail (150mA); requires 10μF output capacitor - powers legacy peripherals or analog sensors |
| IN | Main Input Supply | Accepts 5V–72V; bypassed with 1μF capacitor - feeds both regulators and internal supervision circuitry |
| GATEP | pFET Gate Driver | Drives external p-channel MOSFET for reverse-battery protection - replaces lossy series diode |
| PFI | Power-Fail Input | Resistive-divider input referenced to 1.231V threshold - configures custom battery undervoltage detection point |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables split-rail power delivery: adjustable OUT1 for MCU core + fixed 5V OUT2 for peripherals |
| HOLD + ENABLE1 logic | Allows ignition-key-triggered latching without external components - reduces BOM count in body electronics |
| WD-DIS hardware disable | Permits deterministic watchdog deactivation during firmware update or diagnostic mode - avoids unintended resets |
| Reverse-battery protection via GATEP | Eliminates need for series Schottky diode, reducing voltage drop and heat generation in 12V/24V systems |
| AEC-Q100 qualified | Validated for automotive temperature, vibration, and ESD stress - meets ISO 16750 requirements for under-hood use |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
Use Scenario: Centralized power management for door locks, lighting, and window controls in modern vehicles. IC Role / Device Role / Timing Role: Dual-regulator supervisor providing 3.3V for MCU and 5V for CAN transceivers, with HOLD-latched ignition startup and RESET-driven firmware recovery. Use Value: 68μA quiescent current minimizes battery drain during vehicle sleep; 72V tolerance prevents failure during jump-start or alternator surge. | Use Scenario: Stable, noise-immune power for image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Supplies regulated 3.3V rail with precise 50ms RESET timeout and watchdog monitoring to ensure camera subsystem restarts cleanly after power glitches. Use Value: Low dropout (420mV @100mA) maintains regulation during cold-cranking; thermal shutdown protects against enclosure overheating. |
| Engine Control Unit (ECU) Auxiliary Rail | Telematics Control Unit (TCU) Always-On Power |
Use Scenario: Secondary regulated supply for non-critical ECU subsystems like diagnostics or communication interfaces. IC Role / Device Role / Timing Role: Generates isolated 5V OUT2 for LIN transceivers while OUT1 powers auxiliary logic, with PFI-based battery monitoring for low-voltage alerts. Use Value: PFI comparator with 1.231V reference enables accurate battery state-of-charge estimation using simple resistor divider. | Use Scenario: Maintaining low-power wake-up capability for cellular modem and GNSS receiver in parked vehicle mode. IC Role / Device Role / Timing Role: Provides always-on 3.3V rail with HOLD-latched operation and WD-DIS-controlled watchdog disable during deep-sleep states. Use Value: 27μA shutdown current extends battery life; -40°C to +125°C rating ensures reliability in trunk-mounted TCUs. |
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 |
|---|---|---|---|
| MAX6794TPLD3+T | Same pinout, identical electrical specs, but includes windowed watchdog (WDS0/WDS1) instead of WD-DIS | Required where min/max watchdog windowing is needed for safety-critical firmware validation | Select MAX6794TPLD3+T only if windowed watchdog behavior is mandated; otherwise MAX6793TPLD3+T offers simpler disable control |
| TPS7B8750QKVURQ1 | Single-output (5V), 300mA, 60μA IQ, 40V max input - lacks dual output, watchdog, and HOLD function | Suitable for simpler 5V-only systems without supervision or latching needs | Choose TPS7B8750QKVURQ1 for cost-sensitive, single-rail designs where supervisory features are handled externally |
Compared with MAX6794TPLD3+T, the MAX6793TPLD3+T trades windowed watchdog flexibility for direct hardware disable (WD-DIS), simplifying debug and boot sequencing; versus TPS7B8750QKVURQ1, it adds dual-rail capability, integrated supervision, and higher input voltage tolerance - critical for full-featured automotive modules.
Availability
MAX6793TPLD3+T is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera power, engine control auxiliary rails, and telematics always-on systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6793TPLD3+T 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 MAX6791–MAX6796 product line delivers high-input-voltage linear regulators with integrated supervision, targeting automotive power domains where load-dump resilience, ultra-low quiescent current, and functional safety features are essential.
FAQ
What output voltage options does the MAX6793TPLD3+T support?
The MAX6793TPLD3+T supports fixed 5V on OUT2 and configurable OUT1: preset options include 5V, 3.3V, 2.5V, or 1.8V (selected by grounding SET1), or adjustable 1.8V–11V via external resistor divider. The "D3" in MAX6793TPLD3+T indicates 50ms reset timeout, not output voltage - actual output is determined by the specific variant's ordering code suffix.
How does the HOLD function work in the MAX6793TPLD3+T?
In the MAX6793TPLD3+T, HOLD is an active-low input that latches the regulator ON: once ENABLE1 is asserted and OUT1 starts regulating, pulling HOLD low forces OUT1 to remain active even if ENABLE1 later goes low. Releasing HOLD (high or floating) shuts down OUT1 - enabling ignition-key-triggered self-holding circuits without external components.
Can the watchdog timer in MAX6793TPLD3+T be disabled?
Yes, the MAX6793TPLD3+T includes a dedicated WD-DIS pin: driving WD-DIS low disables the watchdog timer entirely, preventing RESET assertion due to WDI timeout. This is hardware-controlled and independent of WDS0/WDS1 settings - unlike MAX6791/MAX6792, which require logic-level combinations for disable.
What is the purpose of the GATEP pin on the MAX6793TPLD3+T?
The GATEP pin on the MAX6793TPLD3+T drives the gate of an external p-channel MOSFET to implement reverse-battery protection. When battery polarity is inverted, GATEP turns off the pFET, blocking current flow - eliminating the forward voltage drop and power loss of a series diode while protecting downstream circuitry.
Is the MAX6793TPLD3+T qualified for automotive use?
Yes, the MAX6793TPLD3+T is AEC-Q100 qualified and specified for -40°C to +125°C operation. It includes automotive-grade features such as 72V input tolerance (surviving load-dump), thermal shutdown, short-circuit protection, and robust ESD immunity - making it suitable for under-hood and cabin applications per ISO 16750 standards.
MAX6793TPLD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6793TPLD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPLD3+T 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+T reliable?
The price and inventory of MAX6793TPLD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPLD3+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPLD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPLD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPLD3+T?
MAX6793TPLD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPLD3+T 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+T?
For technical support, including MAX6793TPLD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPLD3+T requirements.
6.How does Aetrix verify that MAX6793TPLD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPLD3+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPLD3+T?
All MAX6793TPLD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPLD3+T, 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+T part is unused and in its original packaging.
Return procedure for MAX6793TPLD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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