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Analog Devices Inc./Maxim Integrated MAX6793TPLD4+T
- Part No.:
- MAX6793TPLD4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPLD4+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,626
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Product details
Overview
MAX6793TPLD4+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems requiring robust 5V/3.3V power and reset/wdog monitoring. It operates from 5V to 72V input, delivers up to 150mA per output, features 68μA quiescent current, fixed 5V/3.3V outputs (L/M option), and a 200ms reset timeout (D4). It is used in engine control units and body electronics where load-dump resilience and microprocessor supervision are critical.
For engineers reviewing the MAX6793TPLD4+T datasheet, MAX6793TPLD4+T pinout, MAX6793TPLD4+T application, or MAX6793TPLD4+T equivalent, key selection criteria include its dual 150mA outputs, 5V/3.3V preset configuration (L/M), 200ms reset timeout (D4), -40°C to +125°C AEC-Q100–compatible operation, and TQFN-20EP package with reverse-battery protection via GATEP.
Technical Context
The MAX6793TPLD4+T implements two independent LDO regulators: OUT1 (preset 3.3V, M option) and OUT2 (fixed 5V), each rated for 150mA. Its supervisory block includes an open-drain RESET output with 87.5% reset threshold (M) and capacitor-adjustable or internally fixed 200ms timeout (D4), plus a watchdog timer with fixed 280ms timeout (CSWT = OUT1) and disable capability via WD-DIS.
It integrates HOLD functionality for self-holding circuit implementation without external components, ENABLE1/ENABLE2 for independent output control, and PFI/PFO for programmable power-fail detection referenced to 1.231V. Thermal shutdown at +165°C and short-circuit protection ensure reliability under automotive transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump events without external clamping |
| Quiescent Current | 68μA typical - enables always-on battery monitoring in sleep mode |
| Output Current | 150mA per output - supports dual-rail MCU peripherals (e.g., CAN transceiver + microcontroller core) |
| Reset Threshold | 87.5% of OUT1 nominal - asserts RESET when 3.3V rail drops below 2.888V |
| Reset Timeout | 200ms (D4 option) - ensures stable µP initialization after brownout recovery |
| Watchdog Timeout | 280ms fixed (CSWT = OUT1) - detects firmware lockup in safety-critical ECUs |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive environments |
Pinout & Package
MAX6793TPLD4+T is housed in a thermally enhanced 5mm × 5mm, 20-pin TQFN-EP package (exposed pad connected to GND), supporting up to 2.7W dissipation for continuous operation at high ambient temperatures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | 3.3V fixed output (M option); requires ≥10µF ceramic capacitor to GND for stability |
| SET1 | Feedback Input | Connected to GND to select preset 3.3V; enables adjustable output (1.8V–11V) with external divider |
| PFO | Power-Fail Comparator Output | Open-drain active-low signal asserting when PFI falls below 1.231V (e.g., battery voltage sag) |
| CSRT | Reset Timeout Adjust Input | Connected to OUT1 for fixed 200ms timeout (D4); capacitor-to-GND enables user adjustment |
| GND | Ground Reference | Primary return path; EP pad must be soldered to PCB ground plane for thermal performance |
| RESET | Supervisory Reset Output | Active-low open-drain output synchronized to OUT1; drives µP reset pin directly |
| WDI | Watchdog Input | Edge-sensitive input - transition within 280ms clears watchdog; absence triggers RESET |
| HOLD | Regulator Hold Control | Active-low; forces OUT1/OUT2 ON even if ENABLE1/ENABLE2 is deasserted |
| ENABLE2 | Regulator 2 Enable | Active-high control for fixed 5V OUT2; internal 0.5µA pulldown allows direct MCU GPIO drive |
| PFI | Power-Fail Input | Resistive-divider input referenced to 1.231V threshold; enables customizable undervoltage warning |
| IN | Main Power Input | Accepts 5V–72V; bypassed with 1µF capacitor to GND for transient immunity |
| GATEP | pFET Gate Driver | Drives external p-channel MOSFET for reverse-battery protection; eliminates series diode loss |
| OUT2 | Regulator 2 Output | Fixed 5V output; independent of OUT1; requires ≥10µF capacitor to GND |
| ENABLE1 | Regulator 1 Enable | Active-high control for 3.3V OUT1; internal 0.5µA pulldown supports direct logic-level interface |
| WD-DIS | Watchdog Disable | Active-low input - drives low to disable watchdog; high or tied to OUT1 enables function |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 150mA LDOs | Enables simultaneous 3.3V MCU core and 5V peripheral rail generation from single high-voltage source |
| 68μA ultra-low quiescent current | Meets ISO 16750-2 standby current requirements for automotive infotainment and telematics modules |
| Integrated reverse-battery protection (GATEP) | Eliminates need for external Schottky diode, reducing BOM count and forward-drop losses |
| Programmable power-fail detection (PFI/PFO) | Allows precise battery voltage monitoring (e.g., 12V system < 9.5V) with 35µs response for graceful shutdown |
| Self-holding circuit via HOLD input | Permits ignition-switched startup with latch behavior-no external latching circuitry required |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU and CAN transceiver in gasoline/diesel ECU exposed to 72V load-dump transients. IC Role / Device Role / Timing Role: Dual-output LDO provides isolated 3.3V (MCU core) and 5V (CAN PHY) rails; RESET monitors 3.3V rail for brownout recovery. Use Value: 68μA IQ extends battery life during key-off; 200ms D4 reset timeout ensures deterministic MCU boot after cranking. | Use Scenario: Supplies door module MCU, LIN transceiver, and LED drivers in 12V/24V commercial vehicle BCM. IC Role / Device Role / Timing Role: Regulates 3.3V logic and 5V sensor interface; PFI monitors battery voltage to trigger pre-shutdown alerts before deep discharge. Use Value: HOLD input enables ignition-key-triggered latching; GATEP-driven pFET prevents reverse-polarity damage during service. |
| Advanced Driver Assistance Systems (ADAS) | Electric Power Steering (EPS) |
Use Scenario: Powers vision processor and radar interface in front-camera ECU operating near engine compartment. IC Role / Device Role / Timing Role: Delivers clean 3.3V/5V rails; watchdog monitors processor activity to force safe state on firmware hang. Use Value: -40°C to +125°C rating and thermal shutdown ensure reliability in high-ambient zones; 280ms wdog timeout balances responsiveness and noise immunity. | Use Scenario: Supplies motor controller MCU and gate driver bias in EPS system subject to repeated load dumps. IC Role / Device Role / Timing Role: Provides fault-tolerant 3.3V/5V regulation; RESET output synchronizes safety monitor ICs during power-up sequences. Use Value: 72V input range and built-in overvoltage protection eliminate need for external TVS; dual enable inputs allow phased rail activation. |
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 |
|---|---|---|---|
| MAX6794TPLD4+T | Dual-output variant with identical 3.3V/5V outputs, 150mA per rail, D4 reset timeout, and same TQFN-20EP package | No functional difference; differs only in internal watchdog windowing (MAX6794 lacks windowed wdog vs. MAX6791/MAX6792) | Select MAX6794TPLD4+T if windowed watchdog is not required and pin-for-pin compatibility with MAX6793 is confirmed in layout |
| TPS7B8733QDGNRQ1 | Single 3.3V output (300mA), no dual-rail capability; includes enable, reset, watchdog, but no 5V output or PFI comparator | Requires external 5V regulator for dual-rail systems; lacks power-fail warning and HOLD latch functionality | Choose only for 3.3V-only applications where higher current (300mA) and AEC-Q100 Grade 0 (-40°C to +150°C) are prioritized over dual outputs |
Compared with MAX6794TPLD4+T, the MAX6793TPLD4+T offers identical dual-rail regulation and supervision but excludes windowed watchdog timing-making it simpler for standard timeout-based monitoring. Versus TPS7B8733QDGNRQ1, MAX6793TPLD4+T integrates both 3.3V and 5V rails, PFI detection, and HOLD latching, reducing system-level component count and complexity in multi-rail automotive modules.
Availability
MAX6793TPLD4+T is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera ECUs, and electric power steering systems requiring stable component supply across extended temperature and high-reliability automotive qualification.
Supply support for MAX6793TPLD4+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 automotive, industrial, and communications markets.
The MAX6793TPLD4+T belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators, engineered specifically for automotive subsystems needing wide-input regulation, supervisory functions, and AEC-Q100 compliance in harsh environments.
FAQ
What output voltages does the MAX6793TPLD4+T provide?
The MAX6793TPLD4+T provides two fixed outputs: OUT1 is 3.3V (M option) and OUT2 is 5V. Both are preset and do not require external feedback resistors. The device does not support adjustable output in this configuration - SET1 is internally connected to GND to select the 3.3V option. Output accuracy is ±2.5% over -40°C to +125°C.
What is the meaning of 'D4' in MAX6793TPLD4+T?
The 'D4' in MAX6793TPLD4+T denotes the reset timeout period option: 200ms (with ±30% tolerance). This value is internally fixed when CSRT is connected to OUT1, as specified in the ordering guide. It determines how long RESET remains asserted after OUT1 recovers above its 87.5% threshold, ensuring reliable microprocessor initialization.
Does the MAX6793TPLD4+T support reverse-battery protection?
Yes, the MAX6793TPLD4+T supports reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. When reverse polarity is applied, the internal circuitry disables GATEP output, blocking current flow. No external diode is needed - this reduces voltage drop and power loss compared to traditional solutions.
Can the watchdog timer in MAX6793TPLD4+T be disabled?
Yes, the watchdog timer in MAX6793TPLD4+T can be disabled by driving the WD-DIS pin low. When WD-DIS is low, the watchdog function is inactive and WDI transitions have no effect. WD-DIS is active-low and may be driven directly by a microcontroller GPIO or pulled high (to OUT1) to enable supervision.
What package type and thermal performance does MAX6793TPLD4+T offer?
MAX6793TPLD4+T uses a 5mm × 5mm, 20-pin TQFN-EP package with exposed pad (EP) internally connected to GND. With proper PCB copper pour under the EP, it achieves up to 2.7W power dissipation at +70°C ambient, enabling continuous operation in high-temperature automotive locations such as under-hood ECUs.
MAX6793TPLD4+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:
- 4.625V, 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)
MAX6793TPLD4+T FAQ
1.How can I place an order for MAX6793TPLD4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPLD4+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 MAX6793TPLD4+T reliable?
The price and inventory of MAX6793TPLD4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPLD4+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPLD4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPLD4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPLD4+T?
MAX6793TPLD4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPLD4+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 MAX6793TPLD4+T?
For technical support, including MAX6793TPLD4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPLD4+T requirements.
6.How does Aetrix verify that MAX6793TPLD4+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPLD4+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 MAX6793TPLD4+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPLD4+T?
All MAX6793TPLD4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPLD4+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 MAX6793TPLD4+T part is unused and in its original packaging.
Return procedure for MAX6793TPLD4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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