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Analog Devices Inc./Maxim Integrated MAX6793TPZD1+T
- Part No.:
- MAX6793TPZD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPZD1+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,065
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Product details
Overview
MAX6793TPZD1+T from Maxim Integrated is a dual-output, ultra-low-quiescent-current linear regulator designed for automotive power management. It operates from 5V to 72V input, delivers up to 150mA per output (OUT1 and fixed 5V OUT2), features 68μA quiescent current, 92.5%/87.5% reset threshold tracking, and supports -40°C to +125°C operation in automotive load-dump environments.
For engineers reviewing the MAX6793TPZD1+T datasheet, MAX6793TPZD1+T pinout, MAX6793TPZD1+T application, or MAX6793TPZD1+T equivalent, key selection criteria include dual-rail supervision with independent enable inputs (ENABLE1/ENABLE2), HOLD-based self-holding circuit implementation, adjustable reset timeout via CSRT, and watchdog disable capability via WD-DIS - all critical for ASIL-B-compliant vehicle ECU power sequencing.
Technical Context
The MAX6793TPZD1+T integrates two independent LDO regulators: OUT1 (adjustable or preset 1.8V/2.5V/3.3V/5V) and OUT2 (fixed 5V). Its supervisory block includes a push-pull or open-drain RESET output with fixed 92.5% (L/M) or 87.5% (T/S/Z/Y/W/V) threshold relative to OUT1, and a capacitor-adjustable reset timeout (CSRT) supporting 35μs–200ms durations.
It implements a non-windowed watchdog timer with fixed 280ms minimum timeout (CSWT = OUT1) or capacitor-adjustable period, and supports watchdog disable via WD-DIS pin. The HOLD input enables latch-up behavior without external components, while ENABLE1 and ENABLE2 provide independent control of OUT1 and OUT2, respectively.
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-sensitive systems (e.g., telematics, CAN gateways). |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient to power microcontrollers, CAN transceivers, and sensor interfaces simultaneously. |
| Reset Threshold | 92.5% of OUT1 (L/M option) - ensures deterministic μP reset before brownout-induced code corruption. |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive applications per AEC-Q100 requirements. |
| Dropout Voltage | 840mV typ at 100mA (dual mode) - maintains regulation during cold-crank (6V battery) with minimal headroom loss. |
| Reset Timeout | Capacitor-adjustable (CSRT) - allows precise synchronization with system boot timing across variants. |
Pinout & Package
Package: 20-pin TQFN-EP (5mm × 5mm, exposed pad), thermally enhanced for 2.7W dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT1 | Main regulator output (preset or adjustable 1.8V–11V); requires ≥10μF ceramic bypass to GND. |
| 3 | SET1 | Feedback node for OUT1 voltage setting; GND = preset voltage, resistive divider = adjustable mode. |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust input; connect to OUT1 for fixed 280ms timeout or capacitor to GND for adjustment. |
| 6 | CSRT | Reset timeout adjust input; same configuration as CSWT - sets duration RESET stays asserted after recovery. |
| 7 | GND | Analog/digital ground reference; must be connected to PCB ground plane via exposed pad. |
| 8 | RESET | Active-low reset output (push-pull); tracks OUT1 voltage and asserts during undervoltage or watchdog fault. |
| 9, 10 | WDS1, WDS0 | Watchdog window ratio select (not used in MAX6793 - reserved, no internal connection). |
| 11 | WDI | Watchdog input; rising/falling edge must occur within timeout period to prevent RESET assertion. |
| 12 | HOLD | Active-low hold input; forces OUT1 ON even after ENABLE1 goes low - enables self-holding circuits. |
| 13, 14 | OUT2 | Fixed 5V secondary output; independent of OUT1; requires ≥10μF ceramic bypass to GND. |
| 15 | ENABLE2 | Active-high enable for OUT2; internal 0.5μA pulldown - compatible with open-collector MCU GPIO. |
| 16 | PFI | Power-fail comparator input; set threshold via resistor divider to 1.231V reference - monitors battery or pre-regulator rail. |
| 17, 18 | IN | Main input supply (5V–72V); bypass with ≥1μF ceramic capacitor to GND near pins. |
| 19 | GATEP | pFET gate drive output; controls external p-channel MOSFET for reverse-battery protection (no diode drop). |
| 20 | ENABLE1 | Active-high enable for OUT1; internal 0.5μA pulldown - simplifies ignition-switch interface. |
| 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 enable inputs | ENABLE1 controls OUT1; ENABLE2 controls OUT2 - enables staggered power-up of MCU core and peripherals. |
| HOLD-based self-holding circuit | Eliminates need for external latch or pull-up resistors - reduces BOM count and board space in ignition-controlled modules. |
| WD-DIS watchdog disable pin | Hardware-disable of watchdog function without firmware reconfiguration - critical for diagnostic/test modes. |
| Reverse-battery protection driver (GATEP) | Drives external pFET to replace series diode - achieves <50mV dropout vs. 0.3–0.7V diode drop, improving cold-crank margin. |
| Adjustable reset & watchdog timeouts | CSRT and CSWT pins accept external capacitors - enables precise timing alignment with system bootloader and safety monitor windows. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera ECU |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and LIN interface in vehicle door module with always-on wake-up capability. IC Role / Device Role / Timing Role: Dual-output regulator providing 3.3V for MCU core and 5V for CAN PHY; RESET synchronizes MCU boot with stable rail; HOLD latches power on ignition key-off. Use Value: 68μA quiescent current extends battery life during 14-day parking mode; 72V input tolerance survives jump-start transients. | Use Scenario: Supplying image sensor, ISP, and Ethernet PHY in front-facing ADAS camera with functional safety monitoring. IC Role / Device Role / Timing Role: Supervisory regulator delivering 1.8V (sensor/ISP) and 5V (PHY); watchdog monitors ISP firmware execution; PFO triggers graceful shutdown on battery sag. Use Value: Adjustable reset timeout (CSRT) aligns with ISO 26262 ASIL-B startup sequence; -40°C to +125°C rating supports hood-mount thermal environment. |
| Telematics Control Unit (TCU) | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Powering LTE modem, GNSS receiver, and secure element in cellular-connected vehicle gateway. IC Role / Device Role / Timing Role: Dual-rail source with 3.3V for modem and 5V for GNSS LNA; WD-DIS disables watchdog during OTA firmware update; GATEP enables reverse-battery protection. Use Value: 5V–72V input range accommodates 12V/24V truck/bus platforms; AEC-Q100 qualification ensures field reliability. | Use Scenario: Conditioning power for torque and position sensors in EPS motor control unit exposed to high ambient heat. IC Role / Device Role / Timing Role: Primary regulator supplying 5V to Hall-effect sensors and 3.3V to ADC; thermal shutdown at +165°C prevents latch-up during overheating events. Use Value: 2.7W thermal dissipation in 5mm × 5mm TQFN supports continuous operation at +105°C ambient; PFI monitors 12V rail for early undervoltage detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPZD3+T | Same dual-output architecture, but preset 3.3V/5V outputs (vs. MAX6793's 5V/5V); 87.5% reset threshold on OUT1. | Better suited for systems requiring 3.3V MCU core + 5V peripheral rail; identical pinout and package. | Select MAX6794TPZD3+T when 3.3V/5V rail pairing is required; MAX6793TPZD1+T preferred for dual 5V loads (e.g., dual CAN transceivers). |
| TLV70733PDQNR | Single-output 300mA LDO only; no supervision, watchdog, HOLD, or reverse-battery protection; max 5.5V input. | Limited to low-voltage, non-automotive applications; lacks reset, PFI, and high-voltage capability. | Not a functional substitute - only viable if supervision, wide VIN, and dual outputs are unnecessary and system uses ≤5.5V supply. |
Compared with MAX6794TPZD3+T, MAX6793TPZD1+T provides matched 5V/5V outputs ideal for dual-CAN or dual-sensor interfaces, while TLV70733PDQNR omits all supervisory functions and cannot operate above 5.5V - making it unsuitable for direct replacement in automotive 12V/24V systems.
Availability
MAX6793TPZD1+T is available at Aetrix Electronics and suitable for automotive body electronics, ADAS domain controllers, telematics gateways, and electric power steering modules requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for MAX6793TPZD1+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 MAX6791–MAX6796 product line targets high-voltage automotive power management with integrated supervision, delivering micropower efficiency, load-dump resilience, and functional safety support for ECUs operating from -40°C to +125°C.
FAQ
What output voltage options does the MAX6793TPZD1+T support?
The MAX6793TPZD1+T supports a fixed 5V output on OUT2 and a configurable OUT1 that can be preset to 5V (as indicated by "Z" in the suffix), or adjusted from 1.8V to 11V using an external resistor divider on SET1. The "Z" designation confirms the OUT1 preset is 5V, yielding dual 5V outputs - ideal for powering redundant CAN transceivers or dual-sensor interfaces in automotive applications.
How does the HOLD function work on the MAX6793TPZD1+T?
The HOLD input on the MAX6793TPZD1+T is an active-low signal that, when pulled low after initial regulator enablement, keeps OUT1 and OUT2 powered even if ENABLE1 or ENABLE2 are subsequently deasserted. This creates a self-holding circuit without external components. Releasing HOLD (letting it float or pulling high) shuts down both outputs - a key feature for ignition-controlled modules where power must persist after key-off until controlled shutdown completes.
Can the MAX6793TPZD1+T be used in 24V commercial vehicle systems?
Yes, the MAX6793TPZD1+T is explicitly rated for 5V to 72V input operation, making it suitable for 24V truck and bus platforms. Its ability to withstand 72V transients covers ISO 7637-2 Pulse 5a load-dump events without external clamping, and its -40°C to +125°C specification meets commercial vehicle under-hood thermal requirements. The GATEP pin further supports reverse-battery protection in harsh 24V environments.
What is the purpose of the WD-DIS pin on the MAX6793TPZD1+T?
The WD-DIS pin on the MAX6793TPZD1+T provides hardware-level disable of the watchdog timer. Driving WD-DIS low disables watchdog monitoring entirely, allowing the system to operate without periodic WDI toggling - essential during firmware updates, factory calibration, or diagnostic test modes where watchdog timeouts would otherwise cause unintended resets. This avoids software-only workarounds and enhances test flexibility.
Does the MAX6793TPZD1+T include overvoltage protection on its outputs?
Yes, the MAX6793TPZD1+T includes output overvoltage protection that activates when OUT1 or OUT2 exceeds 1.05× to 1.1× the nominal output voltage, sinking up to 10mA to clamp the rail. This protects downstream logic from damage due to regulator failure or feedback network faults. The protection threshold is internally referenced and guaranteed across temperature, ensuring robustness in automotive safety-critical subsystems.
MAX6793TPZD1+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:
- 2.313V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 2.187ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPZD1+T FAQ
1.How can I place an order for MAX6793TPZD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPZD1+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 MAX6793TPZD1+T reliable?
The price and inventory of MAX6793TPZD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPZD1+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPZD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPZD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPZD1+T?
MAX6793TPZD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPZD1+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 MAX6793TPZD1+T?
For technical support, including MAX6793TPZD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPZD1+T requirements.
6.How does Aetrix verify that MAX6793TPZD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPZD1+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 MAX6793TPZD1+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPZD1+T?
All MAX6793TPZD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPZD1+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 MAX6793TPZD1+T part is unused and in its original packaging.
Return procedure for MAX6793TPZD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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