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Analog Devices Inc./Maxim Integrated MAX6793TPTD0+T
- Part No.:
- MAX6793TPTD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPTD0+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,684
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Product details
Overview
The MAX6793TPTD0+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 fixed 5V OUT2), operates from 5V to 72V input, consumes only 68μA quiescent current, and features active-low open-drain RESET with 35μs delay - ideal for engine control units under load-dump conditions.
For engineers reviewing the MAX6793TPTD0+T datasheet, MAX6793TPTD0+T pinout, MAX6793TPTD0+T application, or MAX6793TPTD0+T equivalent, key selection considerations include its dual-enable architecture (ENABLE1/ENABLE2), HOLD input for self-holding circuits, capacitor-adjustable reset timeout (CSRT), watchdog disable capability (WD-DIS), and AEC-Q100-qualified thermal performance up to +125°C.
Technical Context
The MAX6793TPTD0+T implements two independent LDO regulators: OUT1 is adjustable (1.8V–11V) or preset (5V/3.3V/2.5V/1.8V) via SET1, while OUT2 is fixed at 5V. Its supervisory block includes a reset circuit triggered when OUT1 drops below 92.5% of nominal voltage and a watchdog timer with fixed 280ms timeout (CSWT = OUT1) or capacitor-adjustable period.
It supports reverse-battery protection via GATEP-driven pFET, integrates thermal/short-circuit/output overvoltage protection, and uses internal 2µA pull-up on HOLD and 0.5µA pulldown on ENABLE1/ENABLE2 - enabling robust ignition-controlled power sequencing without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without shutdown |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-sensitive systems |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for MCU core + peripheral rail in ECUs |
| Dropout Voltage | 840mV typ at 100mA (dual) - maintains regulation during cold-crank (6V battery) |
| Reset Threshold | 92.5% of OUT1 nominal - ensures deterministic µP reset before brownout |
| Reset Timeout | 35μs fixed (D0 option) - fast recovery after transient dips without software delay |
| Operating Temp | -40°C to +125°C - fully specified for under-hood automotive environments |
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 |
|---|---|---|
| 1,2 | OUT1 | Main adjustable/fixed regulator output (150mA); requires ≥10μF ceramic bypass |
| 3 | SET1 | Feedback node for OUT1 - GND for preset voltages; resistive divider for 1.8V–11V adjustment |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI < 1.231V (configurable threshold) |
| 5 | CSWT | Watchdog timeout adjust - connect to OUT1 for fixed 280ms timeout or capacitor to GND for scaling |
| 6 | CSRT | Reset timeout adjust - tied to OUT1 for D0 (35μs) in MAX6793TPTD0+T |
| 7 | GND | Analog/digital ground reference; connects to exposed pad for thermal conduction |
| 8 | RESET | Active-low open-drain reset - drives µP reset pin; held low for full timeout after fault clears |
| 11 | WDI | Watchdog input - rising/falling edge must occur within timeout window to prevent reset assertion |
| 12 | HOLD | Active-low hold enable - forces OUT1 ON even if ENABLE1 goes low; internal 2µA pull-up to OUT1 |
| 13,14 | OUT2 | Fixed 5V auxiliary output (150mA); independent of OUT1 regulation status |
| 15 | ENABLE2 | Active-high enable for OUT2 - internal 0.5µA pulldown allows direct microcontroller GPIO control |
| 16 | PFI | Power-fail comparator input - set threshold via resistor divider to monitor battery or pre-regulated rail |
| 17,18 | IN | Main input supply pins - bypass with 1μF ceramic to GND near package |
| 19 | GATEP | pFET gate driver - controls external high-side p-channel MOSFET for reverse-battery protection |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5µA pulldown enables simple ignition-switch interface |
| - | WD-DIS | Watchdog disable input - drive low to disable watchdog function entirely (pin 10 on MAX6793) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | ENABLE1 controls OUT1; ENABLE2 controls OUT2 - enables flexible power sequencing in multi-rail systems |
| Self-holding circuit support | HOLD input latches OUT1 ON after initial enable - eliminates need for external latch or microcontroller polling |
| Capacitor-adjustable timing | CSRT and CSWT accept external capacitors to scale reset/watchdog timeouts across 5 decades (35μs–260ms) |
| Reverse-battery protection driver | GATEP provides controlled gate drive for external pFET - replaces lossy series diode with <100mΩ RDS(on) solution |
| Integrated power-fail detection | PFI/PFO pair enables early warning of battery sag or supply collapse - supports graceful firmware shutdown |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) Camera Module |
|---|---|
Use Scenario: Powering 3.3V MCU core and 5V image sensor interface in under-hood ECU exposed to 72V load-dump transients. IC Role / Device Role / Timing Role: Dual-output regulator providing isolated, sequenced rails with reset supervision and watchdog monitoring of safety-critical firmware. Use Value: 68μA quiescent current prevents battery drain during vehicle sleep mode; 72V input range eliminates need for front-end TVS clamping. | Use Scenario: Supplying 5V for CMOS image sensor and 1.8V for ISP processor in compact ADAS camera housing with limited PCB area. IC Role / Device Role / Timing Role: Single-chip dual-LDO with HOLD-based power retention during ignition cycling and PFI-triggered early warning before brownout. Use Value: TQFN-EP package dissipates 2.7W at +70°C ambient - sustains operation in sealed camera enclosures without heatsinks. |
| Body Control Module (BCM) | Automotive Infotainment Head Unit |
Use Scenario: Generating 5V for CAN transceiver and 3.3V for microcontroller in door module with intermittent wake-up signals. IC Role / Device Role / Timing Role: Regulator with ENABLE1/ENABLE2 independence and WD-DIS pin - allows selective shutdown of non-critical rails while maintaining CAN bus availability. Use Value: WD-DIS disables watchdog during firmware updates - avoids spurious resets during flash programming sequences. | Use Scenario: Powering audio DSP and display controller in head unit requiring glitch-free reset coordination during ignition-on transitions. IC Role / Device Role / Timing Role: Supervisory regulator asserting synchronized RESET to all subsystems upon OUT1 undervoltage, with 35μs delay ensuring clean power-rail settling. Use Value: Fixed D0 reset timeout eliminates capacitor tolerance drift - guarantees consistent reset timing across production lots and temperature. |
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 |
|---|---|---|---|
| MAX6794TPTD0+T | Dual-output like MAX6793TPTD0+T but includes windowed watchdog (WDS0/WDS1) instead of WD-DIS | Suitable where min/max watchdog fault detection is required (e.g., ASIL-B diagnostics), not for simple disable use cases | Select MAX6794TPTD0+T only if windowed watchdog logic is needed; MAX6793TPTD0+T is preferred when watchdog disable simplicity is critical |
| TPS7B8750QKVURQ1 | Single-output 500mA LDO with 35μA IQ, no dual rail or WD-DIS; reset threshold fixed at 92% of VOUT | Lacks OUT2 and HOLD functionality - requires external circuitry for self-holding or auxiliary rail generation | Choose TPS7B8750QKVURQ1 only for cost-sensitive single-rail designs where dual output and HOLD are unnecessary |
Compared with MAX6794TPTD0+T and TPS7B8750QKVURQ1, the MAX6793TPTD0+T uniquely combines dual independent outputs, WD-DIS for unconditional watchdog disable, and HOLD-based latching - making it optimal for ignition-controlled modules requiring minimal external components and deterministic reset behavior.
Availability
MAX6793TPTD0+T is available at Aetrix Electronics and suitable for automotive engine control units, 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 MAX6793TPTD0+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial and automotive applications.
The MAX6791–MAX6796 product line was engineered specifically for automotive power-supply supervision - integrating ultra-low IQ regulation, wide-input voltage tolerance, and diagnostic features (watchdog, PFI, HOLD) into a single AEC-Q100-qualified package.
FAQ
What output voltage options does the MAX6793TPTD0+T support?
The MAX6793TPTD0+T supports preset OUT1 voltages of 5.0V, 3.3V, 2.5V, or 1.8V (selected by grounding SET1), and an adjustable range from 1.8V to 11V using an external resistive divider. OUT2 is fixed at 5.0V. The "D0" suffix in MAX6793TPTD0+T indicates the reset timeout is factory-set to 35μs, not a voltage option.
How does the HOLD function work in the MAX6793TPTD0+T?
In the MAX6793TPTD0+T, driving HOLD low after ENABLE1 is asserted latches OUT1 ON permanently - even if ENABLE1 later goes low. Releasing HOLD (letting it float or pulling high) shuts down OUT1. This enables self-holding power control without external latches or microcontroller intervention, critical for ignition-switched automotive modules.
Can the watchdog timer be completely disabled on the MAX6793TPTD0+T?
Yes - the MAX6793TPTD0+T includes a dedicated WD-DIS pin (Pin 10). Driving WD-DIS low disables the watchdog timer entirely, preventing any WDI-related reset assertions. This differs from MAX6791/MAX6792 which require WDS0/WDS1 logic combinations for disable, making MAX6793TPTD0+T simpler for applications needing unconditional watchdog disable.
What is the purpose of the GATEP pin on the MAX6793TPTD0+T?
The GATEP pin on the MAX6793TPTD0+T drives the gate of an external p-channel MOSFET to implement reverse-battery protection. When battery polarity is reversed, GATEP turns off the pFET, blocking current flow and protecting downstream circuitry - eliminating the power loss and heat associated with traditional series diodes.
Is the MAX6793TPTD0+T qualified for automotive use?
Yes - the MAX6793TPTD0+T is manufactured in an AEC-Q100-qualified process and specified for -40°C to +125°C operation. While the base part number does not carry "/V", its datasheet confirms full automotive qualification including thermal, ESD, and reliability testing per AEC-Q100 Rev H, making it suitable for under-hood and safety-critical applications.
MAX6793TPTD0+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:
- 3.053V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35µs Typical
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPTD0+T FAQ
1.How can I place an order for MAX6793TPTD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPTD0+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 MAX6793TPTD0+T reliable?
The price and inventory of MAX6793TPTD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPTD0+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPTD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPTD0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPTD0+T?
MAX6793TPTD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPTD0+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 MAX6793TPTD0+T?
For technical support, including MAX6793TPTD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPTD0+T requirements.
6.How does Aetrix verify that MAX6793TPTD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPTD0+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 MAX6793TPTD0+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPTD0+T?
All MAX6793TPTD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPTD0+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 MAX6793TPTD0+T part is unused and in its original packaging.
Return procedure for MAX6793TPTD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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