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Analog Devices Inc./Maxim Integrated MAX6793TPWD4+
- Part No.:
- MAX6793TPWD4+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPWD4+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,153
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Product details
Overview
The MAX6793TPWD4+ from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions (RESET, watchdog, power-fail comparator) for automotive systems. It operates from 5V to 72V input, delivers up to 150mA per output, features fixed 5V/3.3V/2.5V/1.8V or adjustable 1.8V–11V outputs, and includes a capacitor-adjustable 200ms reset timeout (D4). It is used in engine control units (ECUs) and body control modules requiring robust brownout recovery and microprocessor supervision.
For engineers reviewing the MAX6793TPWD4+ datasheet, MAX6793TPWD4+ pinout, MAX6793TPWD4+ application, or MAX6793TPWD4+ equivalent, key selection considerations include its dual-regulator architecture, AEC-Q100-compatible thermal performance (−40°C to +125°C), 68μA quiescent current, 5mm × 5mm TQFN-20 EP package, and configurable watchdog windowing (via WDS0/WDS1).
Technical Context
The MAX6793TPWD4+ implements two independent LDO regulators: OUT1 (adjustable or preset) and OUT2 (fixed 5V), each with dedicated enable (ENABLE1/ENABLE2) and shared HOLD for self-holding operation. Its RESET output asserts low on OUT1/OUT2 undervoltage or watchdog timeout, with fixed 92.5% (L/M) or 87.5% (T/S/Z/Y/W/V) threshold relative to nominal output voltage.
It integrates a dual-mode watchdog timer supporting both standard and windowed timeout modes (selectable via WDS0/WDS1), with fast/slow fault detection and WD-DIS disable input. The power-fail comparator (PFI/PFO) uses a precise 1.231V internal reference and provides 35µs response delay for battery monitoring or pre-shutdown signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external protection. |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-powered automotive modules. |
| Output Current | 150mA per output (OUT1 & OUT2) - supports dual-rail MCU + peripheral powering. |
| Reset Timeout | 200ms (D4 option) - ensures reliable microprocessor initialization after brownout recovery. |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive environments. |
| Dropout Voltage | 840mV typ at 100mA - maintains regulation during cold-crank (6V battery) conditions. |
| Watchdog Timeout | 280ms min fixed (CSWT = OUT1) - prevents runaway code execution in safety-critical ECUs. |
Pinout & Package
Package: 20-pin thermally enhanced TQFN-EP (5mm × 5mm, exposed pad), rated for 2.7W dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Dual-output regulator main output (preset or adjustable); requires ≥10μF ceramic bypass to GND. |
| 3 | SET1 | Feedback node for OUT1 voltage setting; GND = preset mode; resistive divider = adjustable mode (1.8V–11V). |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjustment; connect to OUT1 for fixed 280ms timeout or capacitor to GND for adjustable period. |
| 6 | CSRT | Reset timeout adjustment; connected to OUT1 for D4 (200ms) fixed timeout per datasheet ordering guide. |
| 7 | GND | Analog/digital ground reference; must be tied to PCB ground plane and exposed pad. |
| 8 | RESET | Active-low reset output (push-pull or open-drain); asserts during OUT1 undervoltage or watchdog fault. |
| 9,10 | WDS1, WDS0 | Watchdog window ratio select inputs; configure fast/slow fault thresholds (MAX6793 supports windowed mode). |
| 11 | WDI | Watchdog input; rising/falling edge must occur within timeout window to prevent RESET assertion. |
| 12 | HOLD | Active-low hold input; forces OUT1 ON even if ENABLE1 goes low - enables self-holding ignition circuits. |
| 13,14 | OUT2 | Fixed 5V secondary output; supplies auxiliary logic or sensors independently of OUT1. |
| 15 | ENABLE2 | Active-high enable for OUT2; internal 0.5μA pulldown allows direct MCU GPIO control. |
| 16 | PFI | Power-fail comparator input; use resistive divider to set custom battery-monitoring threshold. |
| 17,18 | IN | Main regulator input; bypass with ≥1μF ceramic capacitor to GND for stability. |
| 19 | GATEP | pFET gate drive output; controls external p-channel MOSFET for reverse-battery protection. |
| 20 | ENABLE1 | Active-high enable for OUT1; internal 0.5μA pulldown enables direct MCU control without pull-down resistor. |
| EP | Exposed Pad | Internally connected to GND; must be soldered to PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | OUT1 (adjustable/preset) + OUT2 (fixed 5V) - eliminates need for second discrete LDO in ECU designs. |
| Self-holding circuit support | HOLD input latches OUT1 ON after initial ENABLE1 pulse - enables ignition-switched power without external latch IC. |
| Configurable watchdog windowing | WDS0/WDS1 select fast/slow fault detection thresholds - critical for ASIL-B/C diagnostic coverage in functional safety systems. |
| Reverse-battery protection driver | GATEP drives external pFET - replaces lossy series diode, reducing voltage drop and heat in 12V/24V systems. |
| Integrated power-fail comparator | PFI/PFO with 1.231V precision reference - enables accurate battery voltage monitoring down to ~6V with minimal BOM count. |
| AEC-Q100 qualified thermal design | Rated for −40°C to +125°C with 165°C thermal shutdown - meets automotive under-hood reliability requirements. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers MCU core (3.3V) and CAN transceiver (5V) from vehicle battery subject to load-dump and cold-crank. IC Role / Device Role / Timing Role: Dual-output LDO with RESET supervision and watchdog - ensures deterministic boot and runtime fault containment. Use Value: 68μA quiescent current extends battery life in sleep mode; 72V input tolerance avoids external TVS clamping. |
Use Scenario: Supplies door module microcontroller and LIN transceiver while monitoring battery health for low-voltage shutdown. IC Role / Device Role / Timing Role: Regulator + power-fail comparator + RESET generator - provides coordinated power sequencing and graceful shutdown. Use Value: PFI threshold programmability enables adaptive battery monitoring; HOLD input simplifies ignition-sense latching. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Electric Power Steering (EPS) Control Unit |
Use Scenario: Powers image sensor (1.8V), ISP (2.5V), and interface logic (3.3V) in compact camera housing with limited airflow. IC Role / Device Role / Timing Role: High-efficiency dual LDO with thermal shutdown - maintains stable rail generation under high ambient temperature. Use Value: 5mm × 5mm TQFN-20 EP package delivers 2.7W dissipation; 125°C rating supports sealed enclosure operation. |
Use Scenario: Supplies motor controller MCU and gate drivers in vibration-prone steering column environment. IC Role / Device Role / Timing Role: Supervisory regulator with watchdog and reverse-battery protection - prevents MCU lockup and protects against jump-start faults. Use Value: GATEP-driven pFET eliminates forward voltage drop; windowed watchdog improves fault discrimination in safety-critical torque control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive supervisory regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPWD4+ | Dual-output like MAX6793TPWD4+, but adds windowed watchdog with selectable ratios (via WDS0/WDS1); identical pinout and electrical specs. | Preferred where ASIL-B diagnostic coverage requires fast/slow fault discrimination beyond basic timeout. | Select MAX6794TPWD4+ when windowed watchdog is required; MAX6793TPWD4+ suffices for standard timeout-only supervision. |
| TLV70733PDQNR | Single-output 3.3V LDO only (no watchdog, RESET, or dual rail); 200mA max; 2.5V–5.5V input; SOT-23-5 package. | Limited to low-voltage, non-safety-critical applications without supervision or high-voltage tolerance. | Use only for cost-sensitive, non-automotive 3.3V point-of-load regulation - not a functional replacement for MAX6793TPWD4+. |
Compared with MAX6794TPWD4+, the MAX6793TPWD4+ omits windowed watchdog ratio selection but retains identical dual-regulator performance, RESET behavior, and thermal specs - making it suitable for applications where basic watchdog timeout suffices. TLV70733PDQNR lacks supervision, high-voltage capability, and dual outputs, limiting it to auxiliary low-power rails.
Availability
MAX6793TPWD4+ is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for MAX6793TPWD4+ 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 developed specifically for automotive power management, integrating high-voltage LDO regulation with comprehensive supervisory functions (RESET, watchdog, power-fail) in a single AEC-Q100-qualified package.
FAQ
What output voltage options does the MAX6793TPWD4+ support?
The MAX6793TPWD4+ supports fixed output voltages of 5V, 3.3V, 2.5V, or 1.8V on OUT1, and a fixed 5V on OUT2. OUT1 can also be adjusted from 1.8V to 11V using an external resistive divider connected to SET1. The "WD4" suffix confirms the device is configured for 3.3V OUT1 output with 200ms reset timeout (D4) and windowed watchdog capability.
Does the MAX6793TPWD4+ include reverse-battery protection?
Yes, the MAX6793TPWD4+ integrates reverse-battery protection circuitry via the GATEP pin, which drives the gate of an external p-channel MOSFET. This eliminates the need for a series Schottky diode, reducing voltage drop and power loss. The internal clamp limits IN-to-GATEP voltage to 13.8V–18.8V, enabling robust protection in 12V and 24V automotive systems.
How is the reset timeout period set on the MAX6793TPWD4+?
The MAX6793TPWD4+ uses the CSRT pin to set reset timeout. With "D4" in the part number, CSRT is internally connected to OUT1, selecting a fixed 200ms timeout period. For adjustable timeout, a capacitor is connected from CSRT to GND - the datasheet provides timing curves correlating capacitance to timeout duration (e.g., 0.1μF ≈ 50ms).
What is the function of the HOLD pin on the MAX6793TPWD4+?
The HOLD pin on the MAX6793TPWD4+ enables self-holding operation: when pulled low after initial power-up, it keeps OUT1 enabled even if ENABLE1 returns low. This allows ignition-switched circuits to remain active without external latching components. HOLD is internally pulled up to OUT1 with 2μA current, so leaving it unconnected makes ENABLE1 function as a standard ON/OFF switch.
Is the MAX6793TPWD4+ qualified for automotive use?
Yes, the MAX6793TPWD4+ is designed and tested for automotive applications. It operates over −40°C to +125°C, includes thermal shutdown at +165°C, and features AEC-Q100-qualified variants (e.g., MAX6795TPLD2/V+). While the MAX6793TPWD4+ itself carries the "+" lead-free marking and full temperature spec, system-level AEC-Q100 compliance requires validation in the target application context.
MAX6793TPWD4+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.665V, 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)
MAX6793TPWD4+ FAQ
1.How can I place an order for MAX6793TPWD4+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPWD4+ 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 MAX6793TPWD4+ reliable?
The price and inventory of MAX6793TPWD4+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPWD4+ is usually 5 days.
3.What payment methods are accepted for MAX6793TPWD4+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPWD4+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPWD4+?
MAX6793TPWD4+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPWD4+ 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 MAX6793TPWD4+?
For technical support, including MAX6793TPWD4+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPWD4+ requirements.
6.How does Aetrix verify that MAX6793TPWD4+ is sourced from the original manufacturer or authorized distributors?
All MAX6793TPWD4+ 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 MAX6793TPWD4+ meets industry standards.
7.What is the process for return or replacement of MAX6793TPWD4+?
All MAX6793TPWD4+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPWD4+, 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 MAX6793TPWD4+ part is unused and in its original packaging.
Return procedure for MAX6793TPWD4+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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