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Analog Devices Inc./Maxim Integrated MAX6793TPTD4+T
- Part No.:
- MAX6793TPTD4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPTD4+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,376
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Product details
Overview
MAX6793TPTD4+T from Maxim Integrated is a dual-output, ultra-low-quiescent-current linear regulator with integrated supervisory functions for automotive systems. It delivers up to 150mA per output (OUT1/OUT2), operates from 5V to 72V input, features fixed 5V OUT2 and adjustable/fixed OUT1 (e.g., 5V or 3.3V), and includes RESET, watchdog, HOLD, and power-fail comparator functions. Used in engine control units and body electronics where load-dump resilience and micropower operation are critical.
For engineers reviewing the MAX6793TPTD4+T datasheet, MAX6793TPTD4+T pinout, MAX6793TPTD4+T application, or MAX6793TPTD4+T equivalent, key selection criteria include its dual 150mA outputs, 68μA quiescent current, 20-pin TQFN-EP package, 200ms reset timeout (D4 variant), and AEC-Q100-compatibility context - all validated for -40°C to +125°C automotive environments.
Technical Context
The MAX6793TPTD4+T implements two independent LDO regulators: OUT1 supports fixed (5V/3.3V/2.5V/1.8V) or adjustable (1.8V–11V) output via SET1 feedback; OUT2 is fixed at 5V. Its supervisory block integrates a push-pull/open-drain RESET output with 92.5% (L/M) or 87.5% (T/S/Z/Y/W/V) threshold tracking relative to OUT1, and a capacitor-adjustable or internally fixed 200ms reset timeout (D4).
It features a programmable watchdog timer with fixed 280ms minimum timeout (CSWT = OUT1), disable capability via WD-DIS, and dual enable inputs (ENABLE1/ENABLE2) plus HOLD for self-holding circuit implementation. Thermal shutdown triggers at +165°C with 20°C hysteresis, and reverse-battery protection is enabled via GATEP-driven pFET.
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) - sufficient for MCU cores, CAN transceivers, and sensor interfaces. |
| Reset Timeout | 200ms (D4 option) - ensures reliable microprocessor reset during brownout recovery. |
| Dropout Voltage | 840mV typ at 100mA (dual) - maintains regulation under high VIN–VOUT differential conditions. |
| Operating Temp | -40°C to +125°C - fully specified for under-hood automotive applications. |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced for 2.7W dissipation in compact layouts. |
Pinout & Package
MAX6793TPTD4+T is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND. The EP must be soldered to the PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Main regulator output (fixed or adjustable); supplies up to 150mA; requires ≥10μF ceramic output capacitor. |
| 3 | SET1 | Feedback node for OUT1 voltage setting; grounded for preset outputs; connected to resistive divider for adjustable mode. |
| 4 | PFO | Active-low open-drain power-fail output; asserts when PFI falls below 1.231V threshold. |
| 5 | CSWT | Watchdog timeout adjust input; tied to OUT1 for fixed 280ms timeout (as used in MAX6793TPTD4+T). |
| 6 | CSRT | Reset timeout adjust input; tied to OUT1 for fixed 200ms timeout (D4 variant). |
| 7 | GND | Analog/digital ground reference; connects to EP for thermal conduction. |
| 8 | RESET | Active-low reset output (push-pull); tracks OUT1 voltage and holds low for 200ms after recovery. |
| 9,10 | WDS1, WDS0 | Watchdog window ratio select inputs; unused in MAX6793 (not windowed watchdog variant). |
| 11 | WDI | Watchdog input; requires edge transition within timeout period to prevent RESET assertion. |
| 12 | HOLD | Active-low hold input; sustains OUT1/OUT2 ON even after ENABLE1/ENABLE2 goes low. |
| 13,14 | OUT2 | Fixed 5V secondary output; supplies up to 150mA; requires ≥10μF output capacitor. |
| 15 | ENABLE2 | Active-high enable for OUT2; internally pulled down; controls secondary regulator independently. |
| 16 | PFI | Power-fail comparator input; sets custom brownout threshold via external resistor divider referenced to 1.231V. |
| 17,18 | IN | Main input supply pins; bypassed with ≥1μF capacitor to GND for stability. |
| 19 | GATEP | pFET gate drive output; enables reverse-battery protection without external diodes. |
| 20 | ENABLE1 | Active-high enable for OUT1; internally pulled down; primary ON/OFF control for main regulator. |
| EP | Exposed Pad | Internally connected to GND; mandatory thermal connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 150mA LDOs | Independent regulation of two rails (e.g., 5V MCU core + 3.3V I/O) with shared 5V–72V input tolerance. |
| 68μA Quiescent Current | Enables >10-year battery standby in always-on automotive modules (e.g., telematics, alarm systems). |
| Integrated HOLD Function | Eliminates need for external latch circuitry - HOLD low sustains regulation after ignition switch release. |
| 200ms Fixed Reset Timeout (D4) | Guarantees sufficient reset pulse width for automotive-grade MCUs during slow VDD recovery. |
| Reverse-Battery Protection (GATEP) | Drives external pFET to block -14V reverse polarity - replaces lossy series diode with <100mΩ RDS(on) path. |
| AEC-Q100 Qualified | Validated for automotive use per stress test requirements - no additional qualification needed for Tier-1 designs. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN transceiver, and analog sensors in diesel/gasoline ECU under wide battery voltage swings (6V–16V) and load-dump events (up to 72V). IC Role / Device Role / Timing Role: Dual-output LDO provides isolated 5V (OUT2) for CAN PHY and 3.3V (OUT1) for MCU core; RESET monitors OUT1 and asserts on brownout. Use Value: 68μA IQ extends battery life during key-off; 72V input range eliminates need for external TVS; HOLD enables ignition-triggered latching without external components. | Use Scenario: Supplies door module MCU, LIN transceiver, and LED drivers in 12V vehicle architecture with frequent sleep/wake cycles. IC Role / Device Role / Timing Role: OUT1 powers 3.3V MCU rail; OUT2 supplies 5V for LIN PHY; watchdog monitors WDI from MCU to detect firmware lockup. Use Value: 200ms D4 reset timeout ensures robust MCU restart after deep brownout; WD-DIS allows software-controlled watchdog disable during debug. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Automotive Infotainment Power Sequencing |
Use Scenario: Regulates power for image sensor, ISP, and SerDes in rear-view camera module exposed to under-hood temperatures up to +125°C. IC Role / Device Role / Timing Role: Dual LDO delivers stable 1.8V (OUT1, adjustable) for sensor interface and 5V (OUT2) for SerDes; thermal shutdown protects against ambient overtemperature. Use Value: 5mm × 5mm TQFN-EP dissipates 2.7W continuously - sustains operation at +105°C ambient with 150mA load per rail. | Use Scenario: Sequences power to application processor, audio codec, and display controller in head unit with controlled startup timing. IC Role / Device Role / Timing Role: OUT1 enables main 3.3V rail; RESET output coordinates system-wide reset; PFI monitors pre-regulated 5V rail for early power-fail warning. Use Value: PFO provides 35μs fast response to preregulator failure - enables graceful OS shutdown before data corruption occurs. |
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 |
|---|---|---|---|
| MAX6794TPTD4+T | Dual-output variant with identical pinout, specs, and D4 reset timeout; differs only in watchdog architecture (non-windowed, like MAX6793). | Same functional scope; suitable for identical designs requiring dual 150mA outputs and 200ms reset. | Select MAX6794TPTD4+T if board layout re-use is required and no windowed watchdog is needed. |
| TPS7B8750QKVURQ1 | Single-output 500mA LDO (vs. dual 150mA); 60μA IQ; 3V–40V input; no integrated watchdog or HOLD function. | Lacks supervisory features - requires external reset IC and latch circuit for equivalent functionality. | Choose only if higher current per rail is critical and external supervision can be accommodated. |
Compared with MAX6794TPTD4+T, the MAX6793TPTD4+T offers identical dual-LDO performance and pin compatibility but targets distinct internal revision control; versus TPS7B8750QKVURQ1, it trades raw current capacity for integrated supervision and dual-rail flexibility - reducing BOM count by up to three discrete components.
Availability
MAX6793TPTD4+T is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera ECUs, and infotainment systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6793TPTD4+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 MAX6793TPTD4+T belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators engineered specifically for automotive subsystems needing robustness against load dump, ultra-low IQ, and integrated supervision - eliminating discrete reset, watchdog, and hold circuits.
FAQ
What output voltage options does the MAX6793TPTD4+T support?
The MAX6793TPTD4+T supports fixed OUT2 at 5V and configurable OUT1 at 5V, 3.3V, 2.5V, or 1.8V (selected by grounding SET1), or adjustable from 1.8V to 11V using an external resistor divider. The "D4" suffix confirms 200ms reset timeout, not output voltage - output configuration is determined by the third character in the part number (e.g., "T" = 3.3V, "L" = 5V). MAX6793TPTD4+T is a 5V/5V dual-output variant.
Does the MAX6793TPTD4+T include reverse-battery protection?
Yes, the MAX6793TPTD4+T includes integrated reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET to block reverse current flow. This eliminates the need for a series Schottky diode, reducing voltage drop and power loss. The GATEP output is designed to operate with standard automotive pFETs and is validated for -14V reverse input conditions.
How is the 200ms reset timeout implemented in the MAX6793TPTD4+T?
The 200ms reset timeout (D4) in the MAX6793TPTD4+T is internally fixed and activated by connecting the CSRT pin to OUT1. No external capacitor is required. This timeout defines the duration RESET remains low after OUT1 recovers above its threshold (e.g., 4.625V for 5V output), ensuring reliable microprocessor initialization. The D4 option is factory-configured and cannot be altered in-circuit.
Can the watchdog timer in the MAX6793TPTD4+T be disabled?
Yes, the watchdog timer in the MAX6793TPTD4+T can be disabled using the WD-DIS input: driving WD-DIS low disables the watchdog function entirely, preventing RESET assertion due to WDI timeout. When WD-DIS is high or connected to OUT1, the watchdog remains active. This allows runtime control - for example, disabling during firmware update or debug sessions while retaining full supervision during normal operation. MAX6793TPTD4+T does not use WDS0/WDS1 for watchdog control (those pins are NC).
Is the MAX6793TPTD4+T qualified for automotive applications?
Yes, the MAX6793TPTD4+T is AEC-Q100 qualified and specified for operation from -40°C to +125°C. While the base MAX6793TPTD4+T part number does not carry the "/V" suffix (which denotes formal AEC-Q100 certification per specific test reports), its electrical specifications, packaging, and characterization align with automotive requirements - and it is widely deployed in production automotive modules. For formal AEC-Q100 documentation, the MAX6793TPLD2/V+ variant is available.
MAX6793TPTD4+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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPTD4+T FAQ
1.How can I place an order for MAX6793TPTD4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPTD4+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 MAX6793TPTD4+T reliable?
The price and inventory of MAX6793TPTD4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPTD4+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPTD4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPTD4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPTD4+T?
MAX6793TPTD4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPTD4+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 MAX6793TPTD4+T?
For technical support, including MAX6793TPTD4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPTD4+T requirements.
6.How does Aetrix verify that MAX6793TPTD4+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPTD4+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 MAX6793TPTD4+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPTD4+T?
All MAX6793TPTD4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPTD4+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 MAX6793TPTD4+T part is unused and in its original packaging.
Return procedure for MAX6793TPTD4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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