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Analog Devices Inc./Maxim Integrated MAX6793TPSD2+T
- Part No.:
- MAX6793TPSD2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPSD2+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6793TPSD2+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 a 12.5ms fixed reset timeout (D2) and 87.5% reset threshold - ideal for engine control units under load-dump conditions.
For engineers reviewing the MAX6793TPSD2+T datasheet, MAX6793TPSD2+T pinout, MAX6793TPSD2+T application, or MAX6793TPSD2+T equivalent, key selection considerations include its dual-enable architecture (ENABLE1/ENABLE2), HOLD input for self-holding circuits, watchdog disable capability via WD-DIS, and AEC-Q100-qualified thermal performance up to +125°C.
Technical Context
The MAX6793TPSD2+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 an open-drain RESET output with 87.5% threshold relative to OUT1, internally fixed 12.5ms reset timeout (CSRT = D2), and watchdog timer with WD-DIS pin for full disable - distinct from windowed watchdog variants in MAX6791/MAX6792.
It supports reverse-battery protection via GATEP-driven pFET, integrates thermal/short-circuit/output overvoltage protection, and uses a 20-pin TQFN-EP package with exposed pad tied to GND for enhanced thermal dissipation (2.7W max). The device is specified across –40°C to +125°C and qualified per AEC-Q100.
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 systems like telematics. |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for dual-rail MCU + CAN transceiver biasing. |
| Reset Threshold | 87.5% of OUT1 nominal voltage - ensures reliable brownout detection before logic failure. |
| Reset Timeout | 12.5ms (D2 option) - provides adequate hold time for microcontroller initialization sequences. |
| Dropout Voltage | 840mV typ. at 100mA (dual mode) - maintains regulation during cold-crank (6V battery) with 5V OUT1. |
| Operating Temp | –40°C to +125°C - fully specified for under-hood automotive environments. |
Pinout & Package
MAX6793TPSD2+T is housed in a 5mm × 5mm, 20-pin thermally enhanced TQFN-EP package (exposed pad connected to GND). The package supports up to 2.7W continuous power dissipation and enables compact, high-reliability automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Main adjustable/fixed regulator output (150mA); requires ≥10μF ceramic capacitor to GND. |
| 3 | SET1 | Feedback node for OUT1: grounded for preset voltages; resistive divider for 1.8V–11V adjustment. |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI < 1.231V, used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust: tied to OUT1 for fixed 280ms timeout; capacitor to GND for adjustable period. |
| 6 | CSRT | Reset timeout adjust: tied to OUT1 for fixed 12.5ms (D2); capacitor to GND for user-defined delay. |
| 7 | GND | Analog/digital ground reference; connects to exposed pad for thermal conduction. |
| 8 | RESET | Active-low open-drain reset output - synchronized to OUT1 drop/brownout and watchdog faults. |
| 9,10 | WDS1, WDS0 | Not connected on MAX6793 - unused pins; must be left floating or tied to GND per layout guidelines. |
| 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 after ENABLE1 goes low; internal 2µA pullup to OUT1. |
| 13,14 | OUT2 | Fixed 5V output (150mA); independent of OUT1; requires ≥10μF capacitor to GND. |
| 15 | ENABLE2 | Active-high enable for OUT2 only - internal 0.5µA pulldown allows direct MCU GPIO control. |
| 16 | PFI | Power-fail comparator input - set threshold via resistor divider to 1.231V reference for battery monitoring. |
| 17,18 | IN | Main regulator input - bypass with 1μF ceramic capacitor; accepts 5V–72V unregulated supply. |
| 19 | GATEP | pFET gate driver - drives external p-channel MOSFET for reverse-battery protection (no diode loss). |
| 20 | ENABLE1 | Active-high enable for OUT1 only - internal 0.5µA pulldown enables simple ignition-switch interface. |
| EP | Exposed Pad | Thermal & electrical GND connection - must be soldered to large PCB ground plane for 2.7W operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enables | ENABLE1 controls OUT1; ENABLE2 controls OUT2 - enables flexible power sequencing in multi-rail systems. |
| Self-holding circuit support | HOLD input eliminates need for external latch components - simplifies ignition-controlled power-up in body controllers. |
| Watchdog disable pin | WD-DIS allows full watchdog deactivation via single GPIO - critical for debug modes or safety-critical lockstep operation. |
| Reverse-battery protection drive | GATEP output directly drives pFET gate - achieves <50mΩ effective series resistance vs. Schottky diode solutions. |
| AEC-Q100 qualified | Qualified to Grade 0 (–40°C to +125°C) - meets automotive reliability requirements without derating. |
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 transients. IC Role / Device Role / Timing Role: Dual-output LDO with RESET supervision ensures deterministic boot and brownout recovery during cranking. Use Value: 68μA quiescent current prevents battery drain during vehicle sleep; 72V tolerance avoids external TVS clamping. | Use Scenario: Supplies 5V to CIS camera sensor and 3.3V to ISP processor in rear-view camera module mounted near exhaust. IC Role / Device Role / Timing Role: Regulator + watchdog + RESET generator provides fail-safe power sequencing and fault detection. Use Value: HOLD input enables ignition-triggered latching; thermal shutdown protects against ambient >105°C exposure. |
| Automotive Telematics Control Unit (TCU) | Body Control Module (BCM) |
Use Scenario: Powers LTE modem (3.3V), GNSS receiver (1.8V), and CAN transceiver (5V) in always-connected TCU. IC Role / Device Role / Timing Role: Dual-regulator with independent enables manages wake/sleep states; WD-DIS disables watchdog during firmware updates. Use Value: 12.5ms reset timeout aligns with modem boot timing; PFI/PFO enables battery voltage health monitoring. | Use Scenario: Supplies 5V to door-lock actuators and 3.3V to LIN transceivers in centralized BCM with ignition-synchronized startup. IC Role / Device Role / Timing Role: HOLD + ENABLE1 implements self-holding circuit triggered by ignition signal - no external latch needed. Use Value: GATEP-driven pFET replaces 0.4V Schottky drop, improving efficiency in 12V battery systems. |
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 |
|---|---|---|---|
| MAX6794TPSD2+T | Same pinout, identical specs, but includes windowed watchdog (WDS0/WDS1 pins active) instead of WD-DIS. | Required where min/max watchdog windowing is mandated for functional safety (e.g., ISO 26262 ASIL-B). | Select MAX6794TPSD2+T only if windowed watchdog behavior is required; otherwise MAX6793TPSD2+T offers simpler disable control. |
| TLV70733PDQNR | Single-output, 200mA, 2.5V–5.5V input only; no watchdog, RESET, or HOLD; SOT-23-5 package. | Limited to low-voltage, non-automotive applications (e.g., consumer IoT); lacks supervision and high-voltage capability. | Not suitable as drop-in replacement; use only in cost-sensitive, non-automotive designs with ≤5.5V supply and no supervision needs. |
Compared with MAX6794TPSD2+T and TLV70733PDQNR, the MAX6793TPSD2+T uniquely balances automotive-grade ruggedness (72V, AEC-Q100), dual-rail flexibility, and simplified watchdog disable - making it optimal for ECU and ADAS power domains where deterministic reset control and reverse-battery protection are mandatory.
Availability
MAX6793TPSD2+T is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, telematics control units, and body control modules requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for MAX6793TPSD2+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 product line was engineered specifically for automotive power-supply supervision - integrating high-voltage LDO regulation, watchdog timers, RESET generation, and reverse-battery protection into a single AEC-Q100-qualified package.
FAQ
What output voltage options does the MAX6793TPSD2+T support?
The MAX6793TPSD2+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 resistor divider. OUT2 is fixed at 5.0V. The "S" in the part number denotes the 3.3V preset option for OUT1, confirmed in Maxim's ordering guide.
Does the MAX6793TPSD2+T include reverse-battery protection?
Yes, the MAX6793TPSD2+T includes integrated reverse-battery protection via the GATEP pin, which drives the gate of an external p-channel MOSFET. This eliminates the voltage drop and heat associated with series Schottky diodes, enabling efficient protection against –14V reverse connections in automotive 12V systems.
How is the reset timeout period configured on the MAX6793TPSD2+T?
The MAX6793TPSD2+T uses the CSRT pin to configure reset timeout: tying CSRT to OUT1 selects the internally fixed 12.5ms period (D2 option encoded in the part number). For adjustable timeout, connect a capacitor from CSRT to GND - timeout scales linearly with capacitance per the datasheet's characteristic curve.
What is the function of the WD-DIS pin on the MAX6793TPSD2+T?
The WD-DIS pin on the MAX6793TPSD2+T provides hardware-level watchdog disable: driving WD-DIS low disables the watchdog timer entirely, preventing any WDI-related RESET assertions. This is essential for firmware update modes or safety-critical diagnostic states where watchdog supervision is intentionally suspended.
Is the MAX6793TPSD2+T qualified for automotive use?
Yes, the MAX6793TPSD2+T is AEC-Q100 qualified (Grade 0) and specified for operation from –40°C to +125°C. Its 72V input rating, integrated thermal/overcurrent protection, and robust RESET supervision make it suitable for under-hood and chassis-mounted automotive applications including ECUs and ADAS modules.
MAX6793TPSD2+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:
- 2.888V, Adj
- Output:
- Open Drain or Open Collector
- 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)
MAX6793TPSD2+T FAQ
1.How can I place an order for MAX6793TPSD2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPSD2+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 MAX6793TPSD2+T reliable?
The price and inventory of MAX6793TPSD2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPSD2+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPSD2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPSD2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPSD2+T?
MAX6793TPSD2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPSD2+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 MAX6793TPSD2+T?
For technical support, including MAX6793TPSD2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPSD2+T requirements.
6.How does Aetrix verify that MAX6793TPSD2+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPSD2+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 MAX6793TPSD2+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPSD2+T?
All MAX6793TPSD2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPSD2+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 MAX6793TPSD2+T part is unused and in its original packaging.
Return procedure for MAX6793TPSD2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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