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Analog Devices Inc./Maxim Integrated MAX6793TPWD0+T
- Part No.:
- MAX6793TPWD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPWD0+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,171
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Product details
Overview
MAX6793TPWD0+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems requiring robust operation across 5V–72V input and -40°C to +125°C ambient. It delivers up to 150mA per output (OUT1/OUT2), features fixed 5V OUT2 and adjustable/fixed OUT1 (e.g., 5V/3.3V/2.5V/1.8V), and includes active-low open-drain RESET with 35µs delay and capacitor-adjustable timeout (D0 = 35µs). It supports load-dump survival in automotive ECUs.
For engineers reviewing the MAX6793TPWD0+T datasheet, MAX6793TPWD0+T pinout, MAX6793TPWD0+T application, or MAX6793TPWD0+T equivalent, key selection criteria include its dual-regulator architecture with independent ENABLE1/ENABLE2 control, HOLD input for self-holding circuit implementation, watchdog disable capability via WD-DIS, and AEC-Q100-aligned thermal/short-circuit protection - all in a 20-pin TQFN-EP package.
Technical Context
The MAX6793TPWD0+T implements two independent LDO regulators: OUT1 (adjustable or preset) and fixed 5V OUT2, each with dedicated enable inputs (ENABLE1, ENABLE2) and shared HOLD functionality. Its supervisory block integrates a reset generator triggered by OUT1 voltage drop below 92.5% of nominal (L/M option), a watchdog timer with fixed 280ms timeout (CSWT = OUT1) or capacitor-adjustable period, and a power-fail comparator (PFI/PFO) referenced to 1.231V.
It uses internal current-limited pFET gate drive (GATEP) for reverse-battery protection and incorporates thermal shutdown at +165°C with 20°C hysteresis, short-circuit current limiting (200–240mA), and output overvoltage protection clamping at 105–110% of VOUT. The device operates with 68μA quiescent current and supports continuous regulation under high ambient temperature and load conditions.
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 battery monitoring in sleep-mode vehicle systems |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for MCU core + I/O rail or dual-sensor supply |
| Dropout Voltage | 840mV typ at 100mA - maintains regulation down to VIN ≈ VOUT + 0.84V, critical for low-VIN cold-crank |
| Reset Threshold | 92.5% of OUT1 nominal (L option) - ensures reliable µP reset before brownout-induced corruption |
| Reset Timeout | 35μs fixed (D0 option) - provides fast, deterministic reset assertion for time-critical boot sequences |
| Watchdog Timeout | 280ms min (fixed, CSWT = OUT1) - balances fault detection latency and false-trigger immunity |
| Operating Temp | -40°C to +125°C - fully specified for under-hood automotive placement |
Pinout & Package
MAX6793TPWD0+T is housed in a thermally enhanced 5mm × 5mm, 20-pin TQFN-EP package (exposed pad connected to GND), rated for 2.7W power dissipation and optimized for high-temperature automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 / OUT1 | Regulator 1 Output | Primary regulated output (preset or adjustable 1.8V–11V); max 150mA; requires ≥10µF ceramic bypass |
| 3 / SET1 | OUT1 Feedback Input | Connect to GND for preset voltage; connect external resistor divider for adjustable output |
| 4 / PFO | Power-Fail Comparator Output | Active-low open-drain signal asserting when PFI < 1.231V; used for early battery-low warning |
| 5 / CSWT | Watchdog Timeout Adjust | Connect to OUT1 for fixed 280ms timeout; add capacitor to GND for adjustable period |
| 6 / CSRT | Reset Timeout Adjust | Connect to OUT1 for fixed D0=35µs timeout; capacitor sets longer periods (D1–D4) |
| 7 / GND | Ground Reference | Main signal and power ground; EP must be soldered to PCB ground plane for thermal performance |
| 8 / RESET | Supervisory Reset Output | Active-low open-drain output; asserts when OUT1 drops below threshold or watchdog expires |
| 9, 10 / WDS1, WDS0 | Watchdog Window Select | Not used on MAX6793 - reserved; MAX6793 uses WD-DIS instead of windowed watchdog |
| 11 / WDI | Watchdog Input | Edge-sensitive input; transition required within timeout to prevent RESET assertion |
| 12 / HOLD | Regulator Hold Control | Active-low; forces OUT1 ON even after ENABLE1 goes low - enables self-holding ignition circuits |
| 13, 14 / OUT2 | Regulator 2 Output | Fixed 5V output; max 150mA; requires ≥10µF ceramic bypass; independent of OUT1 regulation |
| 15 / ENABLE2 | OUT2 Enable Input | Active-high; controls OUT2 independently; internally pulled down (0.5µA sink) |
| 16 / PFI | Power-Fail Input | Non-inverting comparator input; set threshold via resistive divider to monitor battery or pre-regulated rail |
| 17, 18 / IN | Main Regulator Input | High-voltage input (5–72V); bypass with 1µF ceramic to GND near pins |
| 19 / GATEP | pFET Gate Driver | Drives external p-channel MOSFET for reverse-battery protection; eliminates series diode loss |
| 20 / ENABLE1 | OUT1 Enable Input | Active-high; controls OUT1 independently; internally pulled down (0.5µA sink) |
| EP / Exposed Pad | Thermal & Electrical Ground | Internally connected to GND; must be soldered to PCB ground plane for thermal conduction and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables simultaneous 5V sensor rail (OUT2) and programmable MCU core rail (OUT1) with separate ON/OFF control |
| HOLD input with self-hold logic | Eliminates need for external latching circuitry in ignition-switched automotive modules |
| WD-DIS watchdog disable pin | Allows safe deactivation of watchdog during firmware debug or bootloader mode without reconfiguring CSWT |
| GATEP pFET driver | Reduces reverse-battery protection voltage drop to ~100mV vs. >600mV for Schottky diodes, improving efficiency |
| Capacitor-adjustable reset & watchdog timeouts | Permits precise timing tuning (e.g., D0=35µs reset, D3=50ms timeout) without changing BOM or layout |
| AEC-Q100-aligned protection suite | Includes thermal shutdown (+165°C), short-circuit limit (240mA), and output OVP (110% VOUT) for functional safety compliance |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera ECU |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and multiple sensors (door lock, window lift, lighting) from 12V battery with load-dump immunity. IC Role / Device Role / Timing Role: Dual-output regulator providing isolated 5V (OUT2) for CAN PHY and 3.3V (OUT1) for MCU core, with HOLD enabling ignition-controlled latching. Use Value: 68μA quiescent current minimizes battery drain during vehicle sleep; 72V input rating survives ISO 7637-2 pulse 5a. | Use Scenario: Supplying image sensor, ISP, and Ethernet PHY in front-facing camera module mounted near engine compartment. IC Role / Device Role / Timing Role: Primary power supervisor delivering 3.3V (OUT1) and 5V (OUT2) while monitoring MCU health via WDI and asserting RESET on brownout or watchdog fault. Use Value: -40°C to +125°C rating and 2.7W thermal dissipation ensure stable operation in high-ambient under-hood locations. |
| Electric Power Steering (EPS) Controller | Automotive Infotainment Head Unit |
Use Scenario: Regulating safety-critical MCU and motor gate drivers in EPS system where ASIL-B compliance demands redundancy and fault response. IC Role / Device Role / Timing Role: Dual LDO with independent ENABLE1/ENABLE2 allows phased startup; RESET output feeds MCU's NMI pin for immediate fault capture. Use Value: 35µs reset delay and 280ms watchdog timeout meet real-time diagnostic timing constraints per ISO 26262. | Use Scenario: Powering application processor, audio codec, and display interface in head unit with always-on wake-up capability. IC Role / Device Role / Timing Role: Provides 5V (OUT2) for USB peripherals and adjustable 1.8V/3.3V (OUT1) for SoC I/O, with PFI monitoring main 12V rail for graceful shutdown. Use Value: PFO output triggers software-initiated save-and-shutdown before battery voltage collapses below operational threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output high-voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPWD0+T | Dual-output variant with identical pinout, specs, and D0 reset timeout; differs only in watchdog architecture (no WD-DIS pin - uses WDS0/WDS1 instead) | Suitable where windowed watchdog (min/max timeout) is required; not pin-compatible due to different watchdog control scheme | Select MAX6794TPWD0+T only if windowed watchdog behavior is needed; MAX6793TPWD0+T offers simpler WD-DIS disable logic |
| TLV70733PDQNR | Single-output, 200mA LDO with 2.5–5.5V input, no supervisory features, SOT-23-5 package | Lacks RESET, watchdog, HOLD, PFI, GATEP - suitable only for non-safety, low-voltage post-regulation | Use TLV70733PDQNR only for cost-sensitive, non-automotive secondary rails where supervision is handled externally |
Compared with MAX6794TPWD0+T and TLV70733PDQNR, the MAX6793TPWD0+T uniquely combines dual 150mA outputs, 5–72V operation, integrated watchdog disable (WD-DIS), and HOLD-based latching in a single AEC-Q100-aligned package - making it irreplaceable for automotive primary power supervision where functional safety and ignition control are mandatory.
Availability
MAX6793TPWD0+T is available at Aetrix Electronics and suitable for automotive body electronics, ADAS domain controllers, electric power steering modules, and infotainment systems requiring stable component supply across extended temperature and high-reliability automotive qualification.
Supply support for MAX6793TPWD0+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 applications.
The MAX6791–MAX6796 product line was engineered specifically for automotive power-supply supervision - integrating high-input-voltage regulation, µP reset, watchdog, power-fail detection, and reverse-battery protection into a single compact package compliant with AEC-Q100 stress testing.
FAQ
What output voltage options does the MAX6793TPWD0+T support for OUT1?
The MAX6793TPWD0+T supports preset OUT1 voltages of 5.0V, 3.3V, 2.5V, or 1.8V (selected by factory configuration encoded in the part number suffix), and also allows adjustable output from 1.8V to 11V using an external resistor divider connected to SET1. The specific preset voltage for MAX6793TPWD0+T is determined by the "W" placeholder in the ordering code per Table 1 of the datasheet; D0 indicates 35µs reset timeout, not output voltage.
Does the MAX6793TPWD0+T provide reverse-battery protection, and how is it implemented?
Yes, the MAX6793TPWD0+T provides reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET placed in series with the input supply. When reverse polarity is applied, the internal circuitry disables the MOSFET, blocking current flow. This replaces lossy series diodes and achieves <100mV forward drop during normal operation - a key advantage confirmed in the Electrical Characteristics table under "IN to GATEP Drive Voltage" and "Clamp Voltage" parameters.
How is the watchdog function disabled on the MAX6793TPWD0+T?
The watchdog function on the MAX6793TPWD0+T is disabled by driving the WD-DIS pin low. Unlike MAX6791/MAX6792 (which use WDS0/WDS1), MAX6793/MAX6794 feature the dedicated WD-DIS input. When WD-DIS is low, the watchdog timer is inactive and will not assert RESET regardless of WDI state. Pulling WD-DIS high or connecting it to OUT1 enables normal watchdog operation - a design choice confirmed in the Pin Description table and Functional Diagram on page 13.
What is the purpose of the HOLD pin on the MAX6793TPWD0+T, and how does it interact with ENABLE1?
The HOLD pin on the MAX6793TPWD0+T is an active-low input that forces OUT1 to remain enabled even after ENABLE1 is driven low - enabling self-holding circuits without external components. Once ENABLE1 is asserted high and OUT1 is stable, pulling HOLD low "latches" the regulator ON. To shut down OUT1, ENABLE1 must first be pulled low, then HOLD released (driven high or left floating). This behavior is explicitly defined in the "Enable and Hold Inputs" section and Table 3 of the datasheet.
Is the MAX6793TPWD0+T qualified to AEC-Q100, and what temperature grade does it support?
The MAX6793TPWD0+T is specified for operation from -40°C to +125°C and is built on an AEC-Q100-qualified process, as confirmed by the "AEC-Q100 Qualified" note applying to MAX6795 variants and the explicit inclusion of MAX6793 in the Ordering Information table with /V+ suffix eligibility. While the base MAX6793TPWD0+T part number does not carry the /V suffix, its absolute maximum ratings, thermal shutdown threshold (+165°C), and full characterization across -40°C to +125°C align with AEC-Q100 Grade 0 requirements for automotive under-hood use.
MAX6793TPWD0+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:
- 1.665V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35µs Typical
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPWD0+T FAQ
1.How can I place an order for MAX6793TPWD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPWD0+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 MAX6793TPWD0+T reliable?
The price and inventory of MAX6793TPWD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPWD0+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPWD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPWD0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPWD0+T?
MAX6793TPWD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPWD0+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 MAX6793TPWD0+T?
For technical support, including MAX6793TPWD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPWD0+T requirements.
6.How does Aetrix verify that MAX6793TPWD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPWD0+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 MAX6793TPWD0+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPWD0+T?
All MAX6793TPWD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPWD0+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 MAX6793TPWD0+T part is unused and in its original packaging.
Return procedure for MAX6793TPWD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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