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Analog Devices Inc./Maxim Integrated MAX6793TPWD2+
- Part No.:
- MAX6793TPWD2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPWD2+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,558
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Product details
Overview
The MAX6793TPWD2+ 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 across a 5V–72V input range, features fixed 5V/3.3V outputs (this variant: 3.3V OUT1, 5V OUT2), 68μA quiescent current, and active-low open-drain RESET with 12.5ms timeout - enabling robust microcontroller reset control in engine control units and body electronics.
For engineers reviewing the MAX6793TPWD2+ datasheet, MAX6793TPWD2+ pinout, MAX6793TPWD2+ application, or MAX6793TPWD2+ equivalent, key selection considerations include its dual enable inputs (ENABLE1/ENABLE2), HOLD self-holding functionality, adjustable watchdog window timing, and AEC-Q100-compatible thermal performance up to +125°C in automotive under-hood environments.
Technical Context
The MAX6793TPWD2+ implements two independent LDO regulators: OUT1 (adjustable or preset 3.3V) and fixed 5V OUT2, each with dedicated enable control and shared HOLD logic. Its supervisory block integrates a windowed watchdog timer (via WDS0/WDS1), programmable reset timeout (CSRT = D2 → 12.5ms), and power-fail comparator (PFI/PFO) referenced to 1.231V.
It uses internal current-limiting, thermal shutdown (+165°C), and output overvoltage protection (105–110% VOUT). The GATEP pin drives an external p-FET for reverse-battery protection, eliminating series diodes while maintaining low dropout (840mV typ @ 100mA, dual mode).
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 (typ) - enables always-on battery monitoring in sleep-mode vehicle systems. |
| Output Current | 150mA per output (OUT1 & OUT2) - supports dual-rail MCU peripherals (e.g., CAN transceiver + sensor interface). |
| Dropout Voltage | 840mV (typ) at 100mA (dual) - ensures regulation down to VIN = 6.14V when VOUT1 = 5.3V. |
| Reset Timeout | 12.5ms (CSRT = D2) - meets ISO 16750-2 cold-crank brownout recovery timing requirements. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 stress testing. |
| Watchdog Type | Windowed (min/max) - detects both stuck-high and stuck-low WDI faults, preventing false resets. |
Pinout & Package
MAX6793TPWD2+ is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP = GND). The package supports 2.7W continuous dissipation and enables compact, high-reliability PCB layouts for automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Regulator 1 output (preset 3.3V); requires ≥10μF ceramic capacitor to GND for stability. |
| 3 | SET1 | Feedback input - tied to GND for 3.3V preset; connects to resistive divider for adjustable output. |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI < 1.231V, used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust - connected to OUT1 for fixed 280ms timeout (D2 variant uses CSRT only). |
| 6 | CSRT | Reset timeout adjust - tied to OUT1 for 12.5ms fixed timeout (D2 code per Ordering Info Table 2). |
| 7 | GND | Power and signal reference - EP must be soldered to PCB ground plane for thermal integrity. |
| 8 | RESET | Active-low open-drain reset - compatible with 1.8V–5V µP reset inputs; pull-up required externally. |
| 11 | WDI | Watchdog input - rising/falling edge must occur within tWD window (280ms min) to prevent reset assertion. |
| 12 | HOLD | Active-low hold - forces OUT1/OUT2 ON even after ENABLE1/ENABLE2 goes low; enables ignition-key self-hold. |
| 13,14 | OUT2 | Fixed 5V output - supplies secondary loads (e.g., LIN transceiver, EEPROM) independently of OUT1. |
| 15 | ENABLE2 | Active-high enable for OUT2 - internal 0.5μA pulldown allows direct connection to microcontroller GPIO. |
| 16 | PFI | Power-fail comparator input - set via resistor divider to monitor battery or pre-regulated rail voltage. |
| 17,18 | IN | Main regulator input - bypassed with 1μF ceramic capacitor to GND near pins for EMI suppression. |
| 19 | GATEP | p-FET gate drive - controls external PMOS for reverse-battery protection (no series diode loss). |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5μA pulldown enables direct MCU control without external pull-down. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | ENABLE1 controls OUT1; ENABLE2 controls OUT2 - enables staggered power sequencing for multi-rail systems. |
| HOLD self-holding circuit | Eliminates need for external latch components - simplifies ignition-switched power architecture in body controllers. |
| Windowed watchdog timer | Detects both fast (tWDI < tWD1) and slow (tWDI > tWD2) WDI faults - prevents undetected firmware lockup in safety-critical ECUs. |
| Reverse-battery protection driver | GATEP drives external p-FET - achieves <10mΩ effective series resistance vs. ~200mΩ diode solution, reducing heat and voltage drop. |
| Thermal & short-circuit protection | Auto-shutdown at +165°C with 20°C hysteresis; current-limited to 240mA (short-circuit) - ensures fault containment without fuse replacement. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powers 3.3V MCU core and 5V CAN transceiver during cold-crank (5.5V battery) and load-dump (72V transient) conditions. IC Role / Device Role / Timing Role: Dual-output LDO with HOLD and watchdog provides fail-safe power sequencing and reset supervision for ASIL-B subsystems. Use Value: 68μA quiescent current extends battery life in parked state; 72V tolerance eliminates need for external TVS on IN rail. |
Use Scenario: Supplies 3.3V door module MCU and 5V LIN transceiver from 12V battery with ignition-switched enable and self-hold behavior. IC Role / Device Role / Timing Role: HOLD input latches power ON after ignition key turn-on; ENABLE2 independently manages LIN bus wake-up. Use Value: Eliminates external latch IC and reduces BOM count by 2–3 components per module. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Automotive Infotainment Power Tree |
|
Use Scenario: Regulates 3.3V image sensor and 5V ISP processor in compact camera housing exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Thermal shutdown (+165°C) and −40°C to +125°C rating ensure operation in sealed, unventilated enclosures. Use Value: 5mm × 5mm TQFN-EP dissipates 2.7W - sustains full 150mA load at +105°C ambient without derating. |
Use Scenario: Provides clean 3.3V supply to audio DSP and 5V supply to display controller in head-unit with power-fail warning capability. IC Role / Device Role / Timing Role: PFI/PFO monitors 12V input rail; asserts PFO before brownout to trigger graceful software shutdown. Use Value: 1.231V precision PFI threshold enables accurate battery voltage monitoring with ±0.5% hysteresis. |
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 |
|---|---|---|---|
| MAX6794TPWD2+ | Same pinout, identical specs, but includes windowed watchdog with selectable ratio (WDS0/WDS1) - MAX6793 uses WD-DIS instead of WDS0/WDS1. | Supports finer watchdog window tuning (e.g., 8×, 16×, 64× ratios) for complex firmware timing validation. | Select MAX6794TPWD2+ if window ratio configurability is required; MAX6793TPWD2+ suffices for fixed-window or disable-only use cases. |
| TLV70733PDQNR | Single 3.3V output, 200mA, 5.5V max input, no watchdog/reset - lacks high-voltage capability, supervision, or dual output. | Only suitable for low-voltage, non-automotive applications (e.g., consumer IoT) where 72V tolerance and AEC-Q100 are not needed. | Not a functional substitute - use only in cost-sensitive, non-automotive designs with VIN ≤ 5.5V and no supervision requirements. |
Compared with MAX6794TPWD2+, the MAX6793TPWD2+ omits WDS0/WDS1 pins in favor of WD-DIS, simplifying watchdog disable logic but removing window-ratio flexibility; compared with TLV70733PDQNR, it delivers 14× higher input voltage range, integrated supervision, and dual-rail capability essential for automotive ECU power domains.
Availability
MAX6793TPWD2+ 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 high-reliability automotive qualification.
Supply support for MAX6793TPWD2+ 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, communications, and automotive applications.
The MAX6793TPWD2+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators, engineered specifically for automotive power-supply supervision - combining ultra-low IQ, wide VIN, dual outputs, and AEC-Q100 reliability in a single chip.
FAQ
What output voltages does the MAX6793TPWD2+ provide?
The MAX6793TPWD2+ provides two regulated outputs: OUT1 is preset to 3.3V (as indicated by 'T' in the ordering code), and OUT2 is fixed at 5V. SET1 is internally connected to GND to select the 3.3V option; no external resistor divider is needed unless adjusting OUT1 voltage.
How is the 12.5ms reset timeout configured on the MAX6793TPWD2+?
The MAX6793TPWD2+ uses the 'D2' suffix to denote a 12.5ms reset timeout period. This is implemented by connecting the CSRT pin to OUT1/OUT2, selecting the internal D2 setting per Table 2 in the datasheet. No external capacitor is required for this fixed timeout.
Does the MAX6793TPWD2+ support reverse-battery protection?
Yes - the MAX6793TPWD2+ includes a dedicated GATEP pin that drives the gate of an external p-channel MOSFET. This enables active reverse-polarity protection with minimal voltage drop (<50mV typical), replacing lossy series diodes in automotive battery-input circuits.
Can the watchdog timer on the MAX6793TPWD2+ be disabled?
Yes - the MAX6793TPWD2+ features a WD-DIS input (Pin 9). Driving WD-DIS low disables the watchdog function entirely, allowing WDI to be left floating or unused without causing unintended resets. This is confirmed in the Pin Description table and Functional Diagram.
Is the MAX6793TPWD2+ qualified for automotive use?
Yes - the MAX6793TPWD2+ is AEC-Q100 qualified (Grade 0: −40°C to +125°C), with full characterization across temperature, lifetime testing, and stress screening per automotive reliability standards. Its 72V input rating and load-dump immunity meet ISO 7637-2 requirements.
MAX6793TPWD2+ 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:
- 8.75ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPWD2+ FAQ
1.How can I place an order for MAX6793TPWD2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPWD2+ 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 MAX6793TPWD2+ reliable?
The price and inventory of MAX6793TPWD2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPWD2+ is usually 5 days.
3.What payment methods are accepted for MAX6793TPWD2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPWD2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPWD2+?
MAX6793TPWD2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPWD2+ 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 MAX6793TPWD2+?
For technical support, including MAX6793TPWD2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPWD2+ requirements.
6.How does Aetrix verify that MAX6793TPWD2+ is sourced from the original manufacturer or authorized distributors?
All MAX6793TPWD2+ 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 MAX6793TPWD2+ meets industry standards.
7.What is the process for return or replacement of MAX6793TPWD2+?
All MAX6793TPWD2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPWD2+, 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 MAX6793TPWD2+ part is unused and in its original packaging.
Return procedure for MAX6793TPWD2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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