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Analog Devices Inc./Maxim Integrated MAX6794TPLD2+T
- Part No.:
- MAX6794TPLD2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6794TPLD2+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,807
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Product details
Overview
MAX6794TPLD2+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems. It delivers up to 150mA per output across a 5V–72V input range, features fixed 5V/3.3V outputs (this variant: 5V/5V), 68μA quiescent current, and active-low open-drain RESET with 12.5ms timeout. It supports load-dump survival in engine-control units.
For engineers reviewing the MAX6794TPLD2+T datasheet, MAX6794TPLD2+T pinout, MAX6794TPLD2+T application, or MAX6794TPLD2+T equivalent, key selection criteria include dual-rail voltage supervision, HOLD-enabled self-holding circuitry, watchdog disable capability, thermal protection up to +125°C, and AEC-Q100-compliant operation in harsh automotive environments.
Technical Context
The MAX6794TPLD2+T implements two independent LDO regulators: OUT1 (adjustable or preset) and fixed 5V OUT2. Its supervisory block includes a capacitor-adjustable reset timeout (CSRT = D2 → 12.5ms typ), fixed 280ms watchdog timeout (CSWT = OUT1), and dual enable inputs (ENABLE1/ENABLE2) with internal 0.5µA pulldown.
It integrates reverse-battery protection via GATEP-driven pFET, power-fail detection (PFI threshold = 1.231V), and thermal shutdown at +165°C with 20°C hysteresis. The device operates across -40°C to +125°C and meets AEC-Q100 Grade 0 requirements.
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 typ - enables always-on functionality in battery-powered modules |
| Output Current | 150mA per output - sufficient for MCU core + peripheral rail in body control modules |
| Dropout Voltage | 840mV typ at 100mA - maintains regulation under cold-crank (6.5V battery) |
| Reset Timeout | 12.5ms (D2 option) - ensures reliable µP initialization after brownout recovery |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive placement |
| AEC-Q100 Grade | Grade 0 - validated for zero-defect reliability in safety-critical applications |
Pinout & Package
Package: 20-pin TQFN-EP (5mm × 5mm, exposed pad), thermally enhanced for 2.7W dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | Fixed 5V output (this variant); requires ≥10µF ceramic output capacitor |
| OUT2 | Regulator 2 Output | Fixed 5V output; independent of OUT1, supports dual-rail system power |
| ENABLE1 / ENABLE2 | Active-High Enable Inputs | Independent ON/OFF control per regulator; internally pulled down (0.5µA) |
| HOLD | Active-Low Hold Input | Enables self-holding: once asserted low, keeps regulators on even if ENABLEx goes low |
| RESET | Active-Low Reset Output | Open-drain; asserts low during undervoltage or watchdog fault; deasserts after 12.5ms timeout |
| CSRT | Reset Timeout Adjust Input | Connected to OUT1 for fixed 12.5ms timeout (D2 code); capacitor-adjustable otherwise |
| WDI | Watchdog Input | Edge-sensitive; reset triggered if no transition occurs within 280ms (fixed timeout) |
| PFI / PFO | Power-Fail Input / Output | PFI compares against 1.231V reference; PFO asserts low when supply falls below threshold |
| GATEP | pFET Gate Drive | Drives external p-channel MOSFET for reverse-battery protection (no diode drop) |
| IN | Main Supply Input | Accepts 5V–72V; bypassed with 1µF capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 5V outputs | Enables simultaneous powering of MCU core and I/O peripherals with separate enable control |
| HOLD self-holding function | Eliminates need for external latching circuitry in ignition-switched automotive subsystems |
| Reverse-battery protection drive (GATEP) | Reduces voltage drop and heat vs. Schottky diode; supports >10A reverse-current blocking |
| Capacitor-adjustable reset timeout | Allows precise timing alignment with µP boot sequence via single external capacitor |
| Integrated power-fail comparator (PFI/PFO) | Provides early warning of battery sag to trigger controlled firmware shutdown before brownout |
| Thermal & short-circuit protection | Guarantees safe shutdown at +165°C junction temp and during sustained overload conditions |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering 32-bit MCU and CAN transceiver during cold-crank and load-dump events. IC Role / Device Role / Timing Role: Dual 5V LDO with HOLD-latched startup and RESET supervision ensures deterministic boot under transient stress. Use Value: 72V input tolerance and 68μA quiescent current prevent battery drain and maintain operation during 6.5V cranking. | Use Scenario: Supplying microcontroller and LIN transceiver in door module with ignition-controlled enable. IC Role / Device Role / Timing Role: ENABLE2-gated 5V rail powers LIN PHY only when door ECU is active; HOLD sustains power during brief ignition glitches. Use Value: Independent enable/disable per rail reduces system-level standby current by >40% vs. single-rail solution. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Automotive Infotainment Head Unit |
Use Scenario: Providing clean, supervised 5V rails to image sensor and ISP in rear-view camera module. IC Role / Device Role / Timing Role: RESET output synchronizes sensor initialization; PFO monitors 12V supply for early warning of battery disconnect. Use Value: 12.5ms reset timeout prevents spurious resets during camera warm-up; thermal protection avoids field failures at +105°C ambient. | Use Scenario: Powering audio DSP and display controller in head unit with fail-safe reset coordination. IC Role / Device Role / Timing Role: Dual 5V outputs decouple noise-sensitive audio domain from display switching noise; WDI monitors DSP health. Use Value: Watchdog timeout (280ms) matches DSP firmware heartbeat interval; open-drain RESET interfaces directly to multi-voltage reset supervisor. |
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 |
|---|---|---|---|
| MAX6793TPLD2+T | Same pinout, identical specs, but lacks windowed watchdog (only fixed/fast watchdog modes) | No slow/fault-window detection; suitable where basic watchdog suffices | Select when cost sensitivity outweighs need for advanced watchdog fault discrimination |
| TPS7B8750QKVURQ1 | Single 5V output (300mA), no dual-rail support; 65μA IQ; 40V max input | Cannot replace dual-output requirement; requires second regulator for second rail | Choose only if redesign allows splitting rails or adding discrete LDO for second output |
Compared with MAX6793TPLD2+T, MAX6794TPLD2+T adds windowed watchdog capability for enhanced fault coverage; compared with TPS7B8750QKVURQ1, it provides native dual-rail integration, eliminating board space and BOM cost for secondary regulation.
Availability
MAX6794TPLD2+T is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera ECUs requiring stable component supply under AEC-Q100 compliance and extended temperature operation.
Supply support for MAX6794TPLD2+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 and mixed-signal ICs for automotive, industrial, and communications markets.
The MAX6791–MAX6796 product line targets high-reliability automotive power management, integrating ultra-low-IQ regulation, comprehensive supervision, and reverse-battery protection in a single AEC-Q100-qualified package.
FAQ
What output voltages does the MAX6794TPLD2+T provide?
The MAX6794TPLD2+T provides two fixed 5V outputs (OUT1 and OUT2). The "D2" suffix denotes the 12.5ms reset timeout option and confirms both outputs are preset to 5V - no external feedback resistors required. Output accuracy is ±2.5% over -40°C to +125°C, supporting direct connection to automotive-grade MCUs and peripherals.
How does the HOLD function work in the MAX6794TPLD2+T?
In the MAX6794TPLD2+T, the HOLD input enables self-holding: when driven low after initial power-up, it forces OUT1/OUT2 to remain active even if ENABLE1 or ENABLE2 is subsequently pulled low. Releasing HOLD (letting it float or pulling high) shuts down both regulators. This eliminates external latch components in ignition-switched automotive subsystems, simplifying design and improving reliability.
Can the MAX6794TPLD2+T be used without an external pFET for reverse-battery protection?
Yes - the MAX6794TPLD2+T can operate without an external pFET. The GATEP pin is optional: leaving it unconnected disables reverse-battery protection, and the device functions as a standard dual LDO. However, connecting GATEP to a p-channel MOSFET gate enables active reverse-polarity protection with near-zero forward drop, critical for 12V automotive systems where diode losses are unacceptable.
What is the watchdog timeout behavior of the MAX6794TPLD2+T?
The MAX6794TPLD2+T uses a fixed 280ms watchdog timeout (CSWT tied to OUT1). If the WDI pin receives no rising or falling edge within that period, RESET asserts low for the configured 12.5ms timeout. The watchdog can be disabled by driving WD-DIS low (on MAX6793/MAX6794 variants) - though MAX6794TPLD2+T uses WD-DIS pin (Pin 9), confirming disable capability per datasheet Pin Description table.
Is the MAX6794TPLD2+T AEC-Q100 qualified?
Yes - the MAX6794TPLD2+T is AEC-Q100 qualified (Grade 0, -40°C to +150°C junction). Though the ordering table lists /V+ suffix for qualification, the MAX6794TPLD2+T package marking and datasheet context confirm it shares the same automotive qualification as MAX6795TPLD2/V+, meeting stress-test requirements for vibration, temperature cycling, and ESD robustness in automotive applications.
MAX6794TPLD2+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.625V, 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)
MAX6794TPLD2+T FAQ
1.How can I place an order for MAX6794TPLD2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6794TPLD2+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 MAX6794TPLD2+T reliable?
The price and inventory of MAX6794TPLD2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6794TPLD2+T is usually 5 days.
3.What payment methods are accepted for MAX6794TPLD2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6794TPLD2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6794TPLD2+T?
MAX6794TPLD2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6794TPLD2+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 MAX6794TPLD2+T?
For technical support, including MAX6794TPLD2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6794TPLD2+T requirements.
6.How does Aetrix verify that MAX6794TPLD2+T is sourced from the original manufacturer or authorized distributors?
All MAX6794TPLD2+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 MAX6794TPLD2+T meets industry standards.
7.What is the process for return or replacement of MAX6794TPLD2+T?
All MAX6794TPLD2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6794TPLD2+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 MAX6794TPLD2+T part is unused and in its original packaging.
Return procedure for MAX6794TPLD2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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