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Analog Devices Inc./Maxim Integrated MAX6793TPYD1+T
- Part No.:
- MAX6793TPYD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPYD1+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6793TPYD1+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems requiring robust 5V–72V input operation and ultra-low 68μA quiescent current. It delivers up to 150mA per output (OUT1/OUT2), features fixed 5V OUT2 and adjustable/fixed OUT1 (e.g., 3.3V), and includes active-low RESET, watchdog timer, HOLD, and ENABLE1/ENABLE2 control - deployed in engine control units and ADAS power domains.
For engineers reviewing the MAX6793TPYD1+T datasheet, MAX6793TPYD1+T pinout, MAX6793TPYD1+T application, or MAX6793TPYD1+T equivalent, key selection criteria include its dual-regulator architecture with independent enable control, 20-pin TQFN-EP package, AEC-Q100-compatibility context, and precise reset threshold behavior tied to OUT1 voltage (87.5% or 92.5%).
Technical Context
The MAX6793TPYD1+T implements two independent LDO regulators: OUT1 supports preset (3.3V) or adjustable (1.8V–11V) output via SET1 feedback, while OUT2 is fixed at 5V. Its supervisory block integrates a windowed watchdog timer (with WDS0/WDS1 select), capacitor-adjustable reset timeout (CSRT), and power-fail comparator (PFI/PFO) referenced to 1.231V.
Control logic uses HOLD to latch regulator state after initial ENABLE1 assertion, enabling self-holding without external components. Thermal shutdown activates at +165°C with 20°C hysteresis, and reverse-battery protection is implemented via GATEP-driven pFET gate drive - all specified across –40°C to +125°C ambient.
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 functionality in battery-sensitive automotive modules. |
| Output Current | 150mA per output (OUT1 & OUT2) - supports dual-rail microcontroller and sensor biasing. |
| Dropout Voltage | 840mV typical at 100mA (dual mode) - ensures regulation down to VIN = VOUT + 0.84V under load. |
| Reset Threshold | 87.5% of OUT1 nominal voltage - provides accurate brownout detection aligned to regulated rail. |
| Watchdog Timeout | Fixed 280ms min or capacitor-adjustable - configurable fault-detection window for MCU supervision. |
| Operating Temperature | –40°C to +125°C - fully qualified for under-hood automotive environments. |
Pinout & Package
MAX6793TPYD1+T is housed in a thermally enhanced 20-pin TQFN-EP (5mm × 5mm) package with exposed pad (EP) connected internally to GND. The package supports up to 2.7W continuous power dissipation and requires PCB thermal vias to ground plane for reliable high-temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | Primary regulated output (preset 3.3V or adjustable 1.8V–11V); supplies main MCU core or I/O rails. |
| OUT2 | Regulator 2 Output | Fixed 5V output; powers peripherals, CAN transceivers, or analog subsystems independently. |
| SET1 | Feedback Input | Connects to resistive divider for adjustable OUT1; grounded for preset voltage selection. |
| ENABLE1 / ENABLE2 | Active-High Enable Inputs | Independently control OUT1 and OUT2; each pulled down internally (0.5μA sink) for default OFF state. |
| HOLD | Active-Low Hold Input | Latches regulator ON after ENABLE1 assertion; releases output when pulled high or floating. |
| RESET | Active-Low Reset Output | Push-pull or open-drain output asserting low during OUT1 undervoltage or watchdog timeout. |
| WDI / WD-DIS | Watchdog Input / Disable | WDI monitors MCU pulse train; WD-DIS disables watchdog when driven low - no WDS0/WDS1 pins on MAX6793. |
| PFI / PFO | Power-Fail Input / Output | PFI compares against 1.231V reference; PFO asserts low on undervoltage for early system shutdown signaling. |
| GATEP | pFET Gate Drive | Drives external p-channel MOSFET for reverse-battery protection - eliminates series diode loss. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables split-rail power delivery: OUT1 (3.3V/adjustable) for MCU core, OUT2 (fixed 5V) for interface ICs - no cross-load coupling. |
| HOLD + ENABLE1 latching | Eliminates need for external latch circuitry; allows ignition-switch-triggered power-up with persistent ON state until explicit hold release. |
| Capacitor-adjustable reset timeout | CSRT pin accepts external capacitor to set reset pulse width (35μs to 260ms), enabling precise timing alignment with MCU reset requirements. |
| Integrated reverse-battery protection | GATEP output drives pFET to block reverse current - reduces BOM count and conduction loss vs. Schottky diode solution. |
| Thermal & overcurrent protection | Auto-shutdown at +165°C with 20°C hysteresis and short-circuit current limiting (200–240mA) - prevents damage during fault conditions. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powering 32-bit MCU, CAN controller, and analog front-end sensors in diesel/gasoline ECU modules exposed to wide battery voltage swings and under-hood temperatures. IC Role / Device Role / Timing Role: Dual-regulator supervisor providing primary 3.3V core rail (OUT1) and auxiliary 5V interface rail (OUT2), with RESET and watchdog ensuring deterministic MCU boot and runtime recovery. Use Value: 68μA quiescent current extends battery life during vehicle sleep mode; 72V input tolerance survives load-dump events without external TVS. | Use Scenario: Supplying vision processor, radar SoC, and camera interface in forward collision warning or lane departure systems. IC Role / Device Role / Timing Role: Regulator + supervisor delivering clean, sequenced 3.3V/5V rails while monitoring processor health via WDI and asserting RESET on software hang or power anomaly. Use Value: HOLD function enables ignition-synchronized power sequencing; PFI/PFO provides early battery voltage warning for graceful sensor shutdown before cutoff. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Managing power to door lock actuators, lighting drivers, and LIN transceivers in centralized body electronics. IC Role / Device Role / Timing Role: Dual-output regulator with independent ENABLE2 control for 5V peripheral rail, and integrated RESET/PFO for system-level fault reporting to main controller. Use Value: 150mA per output supports multiple low-power loads; GATEP-driven reverse-battery protection eliminates discrete FET and saves board space. | Use Scenario: Powering audio DSP, display controller, and USB PHY in automotive infotainment systems requiring low-noise, stable voltage rails. IC Role / Device Role / Timing Role: High-PSRR (69dB @ 100Hz) linear regulator supplying noise-sensitive analog circuits, with RESET synchronized to display initialization sequence. Use Value: Low dropout (840mV @ 100mA) maintains regulation during cold-crank (6V battery); adjustable OUT1 supports custom voltage scaling for audio codecs. |
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 |
|---|---|---|---|
| MAX6794TPYD3+T | Same dual-output architecture, but with 5V/5V fixed outputs (vs. MAX6793's 3.3V/5V) and D3 reset timeout (50ms). | Preferred where both rails require 5V - e.g., legacy MCU + CAN transceiver - but not suitable for 3.3V-core designs. | Select MAX6794TPYD3+T only if dual 5V outputs are required; verify reset timeout matches system boot timing. |
| TLV70733PDQNR | Single-output, 3.3V LDO (200mA), no watchdog/RESET/HOLD; 2.5V–5.5V input only; SOT-23-5 package. | Limited to low-voltage, non-supervised applications - cannot replace MAX6793TPYD1+T in 72V automotive or dual-rail contexts. | Use TLV70733PDQNR only for cost-sensitive, non-automotive 3.3V point-of-load regulation with no supervision needs. |
Compared with MAX6794TPYD3+T and TLV70733PDQNR, MAX6793TPYD1+T uniquely combines dual-rail capability, 72V input tolerance, integrated watchdog, and HOLD latching - making it irreplaceable for new AEC-Q100-compliant ECU and ADAS designs requiring functional safety-aware power management.
Availability
MAX6793TPYD1+T is available at Aetrix Electronics and suitable for automotive engine control units, advanced driver assistance systems, and body control modules requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for MAX6793TPYD1+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, automotive, and communications applications.
The MAX6791–MAX6796 family was engineered specifically for automotive power-supply supervision - integrating high-input-voltage regulation, ultra-low IQ, and fault-monitoring features into a single AEC-Q100-aligned package for ECU and ADAS subsystems.
FAQ
What output voltage options does the MAX6793TPYD1+T support?
The MAX6793TPYD1+T supports a fixed 5V output on OUT2 and a preset 3.3V output on OUT1 (denoted by "Y" in the part number). OUT1 can also be configured as adjustable (1.8V–11V) using an external resistor divider connected to SET1. This configuration is confirmed in the Ordering Information table and Electrical Characteristics section of the MAX6793TPYD1+T datasheet.
Does the MAX6793TPYD1+T include watchdog timer functionality?
Yes, the MAX6793TPYD1+T includes a watchdog timer with fixed 280ms minimum timeout (CSWT = OUT1) or capacitor-adjustable period. Unlike MAX6791/MAX6792, it does not implement a windowed watchdog - instead using WD-DIS pin for enable/disable control and WDI for pulse monitoring. This is explicitly defined in the Pin Description and Watchdog Timer sections of the MAX6793TPYD1+T datasheet.
What is the purpose of the HOLD pin on the MAX6793TPYD1+T?
The HOLD pin on the MAX6793TPYD1+T provides latched enable functionality: when pulled low after ENABLE1 is asserted, it keeps OUT1/OUT2 active even if ENABLE1 returns low. Releasing HOLD shuts down the outputs. This enables self-holding circuits without external components - a feature validated in the Enable and Hold Inputs section and Functional Diagram for MAX6793/MAX6794.
Is the MAX6793TPYD1+T AEC-Q100 qualified?
The MAX6793TPYD1+T is not individually listed as AEC-Q100 qualified in the provided documentation; however, the MAX6795TPLD2/V+ and MAX6795TPSD2/V+ variants are explicitly marked /V+ for automotive qualification. MAX6793TPYD1+T shares the same -40°C to +125°C operating range, thermal protection, and construction as the qualified family members - but formal AEC-Q100 certification applies only to /V+ suffix parts.
How does reverse-battery protection work on the MAX6793TPYD1+T?
The MAX6793TPYD1+T implements reverse-battery protection via the GATEP pin, which drives the gate of an external p-channel MOSFET connected between IN and the input rail. When battery polarity is reversed, internal circuitry pulls GATEP low to turn off the FET, blocking reverse current. This eliminates the voltage drop and heat of a series diode - a design verified in the Reverse-Battery Protection Circuitry section and Functional Diagram.
MAX6793TPYD1+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:
- 2.188V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 2.187ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPYD1+T FAQ
1.How can I place an order for MAX6793TPYD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPYD1+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 MAX6793TPYD1+T reliable?
The price and inventory of MAX6793TPYD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPYD1+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPYD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPYD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPYD1+T?
MAX6793TPYD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPYD1+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 MAX6793TPYD1+T?
For technical support, including MAX6793TPYD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPYD1+T requirements.
6.How does Aetrix verify that MAX6793TPYD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPYD1+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 MAX6793TPYD1+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPYD1+T?
All MAX6793TPYD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPYD1+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 MAX6793TPYD1+T part is unused and in its original packaging.
Return procedure for MAX6793TPYD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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