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Analog Devices Inc./Maxim Integrated MAX6793TPZD3+T
- Part No.:
- MAX6793TPZD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPZD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,488
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Product details
Overview
MAX6793TPZD3+T 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 (OUT1 and fixed 5V OUT2), operates from 5V to 72V input, consumes only 68μA quiescent current, and features a 50ms reset timeout period (D3) with 87.5% reset threshold on OUT1 - enabling robust brownout recovery in engine control units.
For engineers reviewing the MAX6793TPZD3+T datasheet, MAX6793TPZD3+T pinout, MAX6793TPZD3+T application, or MAX6793TPZD3+T equivalent, key selection criteria include dual-rail regulation under load-dump conditions, HOLD-enabled self-holding circuit implementation, watchdog disable capability via WD-DIS, and AEC-Q100-aligned thermal performance up to +125°C.
Technical Context
The MAX6793TPZD3+T implements two independent LDO regulators: OUT1 is adjustable (1.8V–11V) or preset (5V/3.3V/2.5V/1.8V) with SET1 feedback, while OUT2 is fixed at 5V. Its RESET output asserts low when OUT1 drops below 87.5% of nominal voltage and holds for 50ms after recovery - configured by CSRT = D3 (capacitor-adjustable or fixed).
It integrates a non-windowed watchdog timer with fixed 280ms timeout (CSWT = OUT1), disableable via WD-DIS pin, and supports reverse-battery protection using GATEP-driven pFET. ENABLE1 and ENABLE2 independently control OUT1 and OUT2, while HOLD sustains regulation even after ENABLE deactivation.
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 typical - enables always-on ECU modules meeting ISO 8859-3 sleep-current requirements. |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for dual-rail MCU core/I/O supply or sensor interface rails. |
| Reset Timeout | 50ms (D3 option) - ensures microcontroller reset persistence through slow battery recovery after cranking. |
| Reset Threshold | 87.5% of OUT1 nominal voltage - matches common 3.3V/5V rail brownout detection margins. |
| Operating Temp | -40°C to +125°C - fully specified for under-hood automotive environments per AEC-Q100 Grade 0. |
| Dropout Voltage | 840mV typ at 100mA (dual mode) - maintains regulation during cold-cranking (6.5V battery min). |
Pinout & Package
MAX6793TPZD3+T is housed in a thermally enhanced 20-pin TQFN-EP package (5mm × 5mm, exposed pad), rated for 2.7W continuous dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Adjustable or preset main regulator output (150mA max); requires ≥10μF ceramic output capacitor. |
| 3 | SET1 | Feedback node for OUT1 voltage setting; grounded for preset outputs, connected to resistive divider for adjustable operation. |
| 4 | PFO | Open-drain power-fail comparator output; asserts low when PFI < 1.231V - used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust input; tied to OUT1 for fixed 280ms timeout, or capacitor-to-GND for adjustable period. |
| 6 | CSRT | Reset timeout adjust input; tied to OUT1 for fixed 50ms (D3) timeout, or capacitor-to-GND for user-defined delay. |
| 7 | GND | Analog/digital ground reference; must be connected to low-impedance PCB ground plane. |
| 8 | RESET | Active-low push-pull reset output; drives µP reset pin directly without pull-up resistor. |
| 9,10 | WDS1, WDS0 | Not connected on MAX6793 - reserved for windowed watchdog variants (MAX6791/MAX6792) only. |
| 11 | WDI | Watchdog input; requires edge transition within timeout period to prevent reset assertion. |
| 12 | HOLD | Active-low hold enable; forces OUT1 ON regardless of ENABLE1 state - enables ignition-key self-hold circuits. |
| 13,14 | OUT2 | Fixed 5V secondary output (150mA max); supplies CAN transceivers or analog sensors requiring stable 5V rail. |
| 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 detect battery voltage drop below custom threshold. |
| 17,18 | IN | Main regulator input; bypassed with 1μF ceramic capacitor to GND for stability under high dv/dt load-dump events. |
| 19 | GATEP | pFET gate drive output; controls external high-side p-channel MOSFET for reverse-battery protection (no diode loss). |
| 20 | ENABLE1 | Active-high enable for OUT1; internal 0.5μA pulldown enables direct microcontroller control without external pull-down. |
| EP | Exposed Pad | 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 3.3V MCU core + 5V peripheral rail from single high-voltage battery source. |
| HOLD input with self-hold logic | Eliminates need for external latch circuitry in ignition-controlled systems - reduces BOM count and board area. |
| WD-DIS watchdog disable pin | Allows deterministic watchdog shutdown during firmware debug or safe-mode operation without reprogramming. |
| GATEP-driven reverse-battery protection | Replaces lossy series diode with <100mΩ pFET path - improves efficiency and eliminates 0.4V dropout in normal operation. |
| Capacitor-adjustable reset & watchdog timeouts | Permits precise timing tuning (e.g., 50ms reset for CAN bus wake-up sync) without changing IC variant. |
| AEC-Q100 qualified thermal design | Guaranteed operation at +125°C junction temperature supports placement near engine control modules. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU core (3.3V) and CAN FD transceiver (5V) from 12V battery under cranking (6.5V) and load-dump (+72V) conditions. IC Role / Device Role / Timing Role: Dual-output LDO with HOLD-latched startup and 50ms reset persistence ensures deterministic MCU boot after ignition key turn-on. Use Value: Eliminates need for discrete hold circuit and external reset supervisor, reducing component count by ≥4 parts. | Use Scenario: Supplies door module microcontroller and LIN transceiver while monitoring battery health via PFI/PFO. IC Role / Device Role / Timing Role: Integrates power-fail detection (1.231V threshold), regulated 5V/3.3V rails, and watchdog supervision in one package. Use Value: Enables graceful shutdown sequence upon battery voltage decay - prevents EEPROM corruption during vehicle power-off. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Electric Power Steering (EPS) Controller |
Use Scenario: Provides clean 1.8V image sensor core supply and 3.3V ISP processor rail with ultra-low quiescent current during parking mode. IC Role / Device Role / Timing Role: 68μA IQ and HOLD functionality maintain camera readiness without draining 12V battery over extended idle periods. Use Value: Extends parking surveillance runtime by >30% versus standard LDOs, meeting OEM 72-hour standby requirement. | Use Scenario: Regulates 5V motor driver logic and 3.3V MCU supply in high-temperature steering column environment. IC Role / Device Role / Timing Role: Thermal shutdown at +165°C with 20°C hysteresis prevents lockup during sustained high-torque assist events. Use Value: Maintains functional safety integrity (ASIL-B) without external thermal monitoring circuitry. |
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 |
|---|---|---|---|
| MAX6794TPZD3+T | Same pinout and electrical specs, but includes windowed watchdog (WDS0/WDS1 pins active) - not present on MAX6793. | Required where fault discrimination between fast/slow watchdog timeouts is needed (e.g., ASIL-C diagnostics). | Select MAX6794TPZD3+T only if windowed watchdog functionality is mandated; otherwise MAX6793TPZD3+T reduces system complexity. |
| TLV70733PDQNR | Single 3.3V output, 200mA, 5.5V max input, no watchdog or RESET - lacks high-voltage capability and supervisory features. | Suitable only for post-regulated 3.3V rails in non-automotive, low-input-voltage applications. | Not a functional substitute; use only in non-automotive designs with ≤5.5V supply and no supervision needs. |
Compared with MAX6794TPZD3+T, MAX6793TPZD3+T omits windowed watchdog logic - simplifying firmware integration and reducing pin count - while retaining identical regulation, reset, and HOLD functionality for cost-sensitive automotive modules.
Availability
MAX6793TPZD3+T is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera ECUs, and electric power steering controllers requiring stable component supply across extended temperature and high-reliability automotive qualification.
Supply support for MAX6793TPZD3+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 and mixed-signal ICs for automotive, industrial, and communications markets, with emphasis on high-reliability, low-power, and high-voltage solutions.
The MAX6791–MAX6796 product line was engineered specifically for automotive power management, integrating dual LDO regulation, reset supervision, watchdog monitoring, and reverse-battery protection into a single AEC-Q100-qualified package.
FAQ
What output voltage options does the MAX6793TPZD3+T support?
The MAX6793TPZD3+T supports preset output voltages of 5.0V, 3.3V, 2.5V, or 1.8V on OUT1 (selected by grounding SET1), plus a fixed 5.0V on OUT2. OUT1 can also be adjusted from 1.8V to 11V using an external resistive divider connected to SET1. The 'Z' in MAX6793TPZD3+T denotes a 3.3V preset for OUT1.
How is the 50ms reset timeout period implemented on the MAX6793TPZD3+T?
The MAX6793TPZD3+T achieves its 50ms reset timeout (D3) by connecting the CSRT pin to OUT1 - selecting the internally fixed timeout value. This configuration avoids external timing capacitors, ensuring production consistency and eliminating drift due to capacitor tolerance or temperature variation across the -40°C to +125°C range.
Does the MAX6793TPZD3+T include reverse-battery protection, and how is it implemented?
Yes, the MAX6793TPZD3+T includes reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. When battery polarity is reversed, the IC disables GATEP output, turning off the pFET and blocking current flow - eliminating the 0.4V forward drop and heat generation of traditional series diodes while maintaining full 72V transient capability.
Can the watchdog function be disabled on the MAX6793TPZD3+T, and how?
Yes, the watchdog function on the MAX6793TPZD3+T can be disabled by driving the WD-DIS pin low. When WD-DIS is low, the watchdog timer is inhibited regardless of WDI activity, and RESET is no longer asserted due to watchdog timeout - enabling safe operation during firmware development or diagnostic modes without hardware modification.
What is the purpose of the HOLD pin on the MAX6793TPZD3+T, and how does it interact with ENABLE1?
The HOLD pin on the MAX6793TPZD3+T provides self-holding functionality: once OUT1 is enabled via ENABLE1, pulling HOLD low sustains regulation even if ENABLE1 later goes low - mimicking an ignition-key latching circuit. Releasing HOLD (high or open) shuts down OUT1. This eliminates external latch components and supports fail-safe shutdown sequences in automotive systems.
MAX6793TPZD3+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:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPZD3+T FAQ
1.How can I place an order for MAX6793TPZD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPZD3+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 MAX6793TPZD3+T reliable?
The price and inventory of MAX6793TPZD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPZD3+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPZD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPZD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPZD3+T?
MAX6793TPZD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPZD3+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 MAX6793TPZD3+T?
For technical support, including MAX6793TPZD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPZD3+T requirements.
6.How does Aetrix verify that MAX6793TPZD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPZD3+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 MAX6793TPZD3+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPZD3+T?
All MAX6793TPZD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPZD3+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 MAX6793TPZD3+T part is unused and in its original packaging.
Return procedure for MAX6793TPZD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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