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Analog Devices Inc./Maxim Integrated MAX6793TPSD1+
- Part No.:
- MAX6793TPSD1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPSD1+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,565
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Product details
Overview
MAX6793TPSD1+ 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 active-low open-drain RESET with 87.5% reset threshold relative to OUT1 - used in engine control units and ADAS domain controllers requiring robust brownout recovery.
For engineers reviewing the MAX6793TPSD1+ datasheet, MAX6793TPSD1+ pinout, MAX6793TPSD1+ application, or MAX6793TPSD1+ equivalent, this page provides verified technical context, exact pin functionality, automotive-grade thermal performance data, and confirmed alternative parts with documented functional differences.
Technical Context
The MAX6793TPSD1+ implements two independent LDO regulators: OUT1 is adjustable (1.8V–11V) or preset (5V/3.3V/2.5V/1.8V) via SET1, while OUT2 is fixed at 5V. It uses internal 1.231V reference for PFI comparator and 124mV/62mV thresholds for Dual-Mode™ watchdog windowing.
Supervision includes capacitor-adjustable reset timeout (via CSRT), fixed 280ms min watchdog timeout (CSWT = OUT1), and HOLD input enabling self-holding latch behavior without external components - critical for ignition-controlled power sequencing in automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external protection circuitry. |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-sensitive systems like telematics modules. |
| Output Current | 150mA per output (OUT1 & OUT2) - supports dual-rail MCU + CAN transceiver powering from single IC. |
| Reset Threshold | 87.5% of OUT1 nominal voltage - ensures reliable microcontroller reset before logic supply collapse. |
| Dropout Voltage | 840mV typ at 100mA (dual mode) - maintains regulation during cold-crank conditions down to 6V battery. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive placement per AEC-Q100 requirements. |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced layout supports 2.7W dissipation at +70°C ambient. |
Pinout & Package
MAX6793TPSD1+ is housed in a 20-pin thermally enhanced TQFN-EP package (5mm × 5mm, exposed pad). The EP is internally connected to GND and must be soldered to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | Adjustable (1.8V–11V) or preset (5V/3.3V/2.5V/1.8V); max 150mA; requires ≥10μF output capacitor. |
| SET1 | Feedback Input | Connect to GND for preset voltage; connect external resistor divider for adjustable output configuration. |
| PFO | Power-Fail Comparator Output | Open-drain active-low signal asserting when PFI falls below 1.231V - used for early battery low warning. |
| CSWT | Watchdog Timeout Adjust | Connect to OUT1 for fixed 280ms min timeout; add capacitor to GND for user-adjustable period. |
| CSRT | Reset Timeout Adjust | Connect to OUT1 for fixed timeout options (35μs/3.125ms/12.5ms/50ms/200ms); capacitor adjusts continuously. |
| GND | Ground Reference | Common return for all analog/digital circuits; connects to exposed pad (EP) internally. |
| RESET | Supervisory Reset Output | Active-low open-drain output synchronized to OUT1 voltage drop and watchdog fault detection. |
| WDI | Watchdog Input | Accepts rising/falling edges; failure to toggle within timeout asserts RESET - prevents firmware lockup. |
| HOLD | Regulator Hold Control | Active-low input latching regulator ON state even after ENABLE1 removal - enables ignition-key hold functionality. |
| ENABLE1 | Regulator 1 Enable | Active-high input with 0.5μA internal pulldown; controls OUT1 independently of OUT2. |
| OUT2 | Regulator 2 Output | Fixed 5V output, 150mA capable; requires ≥10μF output capacitor; no adjustment possible. |
| ENABLE2 | Regulator 2 Enable | Active-high input with 0.5μA internal pulldown; controls fixed 5V OUT2 independently. |
| PFI | Power-Fail Input | Non-inverting comparator input referenced to 1.231V; set threshold via external resistive divider. |
| IN | Main Power Input | Accepts 5V–72V; bypass with 1μF capacitor to GND for stability during load transients. |
| GATEP | pFET Gate Drive | Drives external p-channel MOSFET gate for reverse-battery protection - eliminates series diode loss. |
| WD-DIS | Watchdog Disable | Active-low input disabling watchdog timer; high or tied to OUT1 enables supervision function. |
| N.C. | No Connect | Pins 9, 10, 13, 14, 15 are not internally connected on MAX6793/MAX6794 - leave unpopulated. |
| 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 enable inputs | ENABLE1 and ENABLE2 allow separate control of OUT1 and fixed 5V OUT2 - supports staggered power-up sequences. |
| Self-holding latch via HOLD | HOLD input sustains regulator operation after initial ENABLE1 assertion - eliminates need for external latch circuitry in ignition systems. |
| Reverse-battery protection drive | GATEP output drives external pFET to block reverse current - replaces lossy series diode with <100mΩ RDS(on) solution. |
| Capacitor-adjustable timing | CSRT and CSWT pins support continuous timeout tuning using standard ceramic capacitors - avoids trimming resistors or OTP programming. |
| Thermal & overcurrent protection | Integrated shutdown at +165°C with 20°C hysteresis and short-circuit current limiting - ensures safe operation during fault conditions. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powers 3.3V MCU core and 5V CAN transceiver from 12V vehicle battery under cold-crank (6V) and load-dump (72V) conditions. IC Role / Device Role / Timing Role: Dual-output LDO with independent EN control and HOLD-latched startup - manages power sequencing and brownout resilience. Use Value: 68μA quiescent current extends battery life in key-off monitoring; 72V tolerance eliminates external TVS clamping. | Use Scenario: Supplies vision processor and radar sensor interface in front camera module operating near engine compartment. IC Role / Device Role / Timing Role: High-temp LDO (−40°C to +125°C) with watchdog supervision - detects firmware hangs and forces controlled reboot. Use Value: 2.7W thermal capability in 5mm × 5mm TQFN enables compact placement; PFI comparator triggers graceful shutdown before brownout. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) |
Use Scenario: Powers LTE modem, GNSS receiver, and secure element from vehicle battery with always-on requirement. IC Role / Device Role / Timing Role: Micropower dual LDO with RESET and watchdog - maintains communication link integrity during transient events. Use Value: 87.5% reset threshold ensures deterministic MCU reset before supply collapse; WD-DIS allows firmware-controlled supervision disable. | Use Scenario: Supplies door module MCU and LIN transceiver in distributed body electronics architecture. IC Role / Device Role / Timing Role: Dual-rail regulator with HOLD input - implements ignition-key triggered power hold without external components. Use Value: Self-holding circuit reduces BOM count; adjustable OUT1 supports multiple MCU voltage variants across platform. |
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 |
|---|---|---|---|
| MAX6794TPSD1+ | Same pinout, identical electrical specs, but includes windowed watchdog (WDS0/WDS1) - adds fast/slow fault discrimination. | Required where ISO 26262 ASIL-B fault detection mandates windowed watchdog behavior. | Select MAX6794TPSD1+ only if windowed watchdog is required; otherwise MAX6793TPSD1+ offers simpler WDI-only supervision. |
| TLV70733PDQNR | Single 3.3V output, 300mA, 5.5V max input, no watchdog or RESET - lacks automotive voltage range and supervision features. | Suitable only for non-automotive, low-voltage, single-rail applications with no safety monitoring needs. | Not a functional replacement; use only in cost-sensitive consumer designs without load-dump or supervision requirements. |
Compared with MAX6794TPSD1+, the MAX6793TPSD1+ omits windowed watchdog logic - reducing complexity and cost for applications needing basic timeout-based supervision. Compared with TLV70733PDQNR, it provides full 5V–72V operation, dual outputs, and integrated safety features essential for automotive deployment.
Availability
MAX6793TPSD1+ is available at Aetrix Electronics and suitable for engine control units, ADAS cameras, telematics modules, and body control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6793TPSD1+ 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 delivers high-voltage, micropower LDOs with integrated supervision specifically for automotive subsystems demanding AEC-Q100 compliance, load-dump immunity, and fail-safe power sequencing.
FAQ
What output voltage options does the MAX6793TPSD1+ support?
The MAX6793TPSD1+ supports preset output voltages of 5.0V, 3.3V, 2.5V, or 1.8V on OUT1, selectable by grounding SET1. It also supports adjustable OUT1 output from 1.8V to 11V using an external resistor divider. OUT2 is fixed at 5.0V. The "SD1" suffix indicates 3.3V OUT1 with 87.5% reset threshold and 50ms reset timeout period - confirmed in Maxim's ordering guide.
Does the MAX6793TPSD1+ include reverse-battery protection?
Yes, the MAX6793TPSD1+ integrates reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. This eliminates the need for a series Schottky diode, reducing voltage drop and power loss. The GATEP output is rated for 13.8V to 18.8V clamp voltage and 8V to 12V drive voltage at VIN = 20V - enabling robust protection against −14V reverse battery faults.
How is the watchdog timer configured on the MAX6793TPSD1+?
The MAX6793TPSD1+ watchdog timer uses a fixed minimum timeout of 280ms (typical) when CSWT is connected to OUT1. For adjustable timeout, connect a capacitor from CSWT to GND - values from 150pF to 10nF yield 170ms to 290ms periods. Unlike MAX6791/MAX6792, the MAX6793TPSD1+ does not support windowed watchdog; it uses standard single-timer supervision with WD-DIS pin for disable control.
What is the purpose of the HOLD pin on the MAX6793TPSD1+?
The HOLD pin on the MAX6793TPSD1+ implements a self-holding latch: when pulled low after ENABLE1 activation, it keeps OUT1/OUT2 enabled even if ENABLE1 returns low - ideal for ignition-switched systems. HOLD is internally pulled up to OUT1 with 2μA current, so connecting it to OUT1 or leaving it floating makes ENABLE1 behave as a standard ON/OFF switch. This eliminates external latch components in automotive power architectures.
Is the MAX6793TPSD1+ AEC-Q100 qualified?
The MAX6793TPSD1+ is specified for −40°C to +125°C operation and built on Maxim's automotive-grade process, but AEC-Q100 qualification applies only to specific variants denoted with "/V+" suffix (e.g., MAX6795TPSD2/V+). The MAX6793TPSD1+ is not explicitly AEC-Q100 certified per its datasheet; however, its absolute maximum ratings, thermal performance, and automotive-focused features make it suitable for many automotive applications where full qualification is not mandated.
MAX6793TPSD1+ 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:
- 2.888V, 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)
MAX6793TPSD1+ FAQ
1.How can I place an order for MAX6793TPSD1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPSD1+ 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 MAX6793TPSD1+ reliable?
The price and inventory of MAX6793TPSD1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPSD1+ is usually 5 days.
3.What payment methods are accepted for MAX6793TPSD1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPSD1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPSD1+?
MAX6793TPSD1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPSD1+ 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 MAX6793TPSD1+?
For technical support, including MAX6793TPSD1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPSD1+ requirements.
6.How does Aetrix verify that MAX6793TPSD1+ is sourced from the original manufacturer or authorized distributors?
All MAX6793TPSD1+ 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 MAX6793TPSD1+ meets industry standards.
7.What is the process for return or replacement of MAX6793TPSD1+?
All MAX6793TPSD1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPSD1+, 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 MAX6793TPSD1+ part is unused and in its original packaging.
Return procedure for MAX6793TPSD1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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