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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX6791TPVD1+

Name: MAX6791TPVD1+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6791TPVD1+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6791TPVD1+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: 20-WQFN Exposed Pad

Datasheet:: MAX6791TPVD1+.pdf

Description:: IC SUPERVISOR 2 CHANNEL 20TQFN

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Product details

Overview

MAX6791TPVD1+ from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions for automotive systems. It delivers up to 150mA per output (OUT1/OUT2), operates from 5V to 72V input, consumes only 68μA quiescent current, and features fixed 5V OUT1 + adjustable or preset OUT2 (1.8V–11V). It is used in engine control units (ECUs) requiring robust brownout protection and microcontroller reset supervision.

For engineers reviewing the MAX6791TPVD1+ datasheet, MAX6791TPVD1+ pinout, MAX6791TPVD1+ application, or MAX6791TPVD1+ equivalent, key selection criteria include its dual-regulator architecture with independent enable inputs, windowed watchdog timer (MAX6791-specific), HOLD self-hold functionality, AEC-Q100-qualified thermal performance (−40°C to +125°C), and 5mm × 5mm TQFN-EP package with 2.7W power dissipation capability.

Technical Context

The MAX6791TPVD1+ implements two independent LDO regulators: OUT1 is fixed at 5V (or adjustable via SET1), while OUT2 is fixed at 5V - both rated for 150mA continuous output. Its supervisory block includes a windowed watchdog timer (with selectable min/max timeout ratios via WDS0/WDS1), a push-pull or open-drain RESET output with 92.5%/87.5% threshold tracking, and capacitor-adjustable reset timeout (CSRT).

It integrates reverse-battery protection via GATEP-driven pFET control, power-fail detection (PFI/PFO) with 1.231V internal reference, and HOLD input enabling self-holding operation without external components. All protections - thermal shutdown (+165°C), short-circuit current limiting (200–240mA), and output overvoltage clamping (1.05×VOUT) - are fully specified across −40°C to +125°C.

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 ECU subsystems with ultra-low standby power.
Output Current	150mA per output (OUT1 & OUT2) - supports dual-rail MCU + peripheral biasing.
Dropout Voltage	840mV typ. at 100mA (dual mode) - maintains regulation under low VIN conditions (e.g., cold-crank at 6V).
Reset Threshold Accuracy	±1.5% over temperature - ensures precise brownout detection for deterministic μP reset behavior.
Watchdog Timeout	Windowed: tWD1 = 6.25ms (min), tWD2 = 280ms (min) - detects both stuck-high and stuck-low WDI faults.
Operating Temperature	−40°C to +125°C - fully qualified for under-hood automotive environments.

Pinout & Package

MAX6791TPVD1+ is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND. The package supports up to 2.7W continuous power dissipation and requires PCB thermal vias to ground plane for reliable high-temperature operation.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 / OUT1	Regulator 1 Output	Fixed 5V or adjustable (1.8V–11V) output; 150mA max; requires ≥10μF ceramic output capacitor.
3 / SET1	Feedback Input	Connect to GND for preset 5V; connect resistive divider for adjustable VOUT1 - sets output voltage ratio.
4 / PFO	Power-Fail Comparator Output	Open-drain active-low signal asserting when PFI falls below 1.231V - enables early battery-low warning.
5 / CSWT	Watchdog Timeout Adjust	Connect to OUT1 for fixed 280ms timeout; add capacitor to GND for user-adjustable period (e.g., 1500pF → 236ms).
6 / CSRT	Reset Timeout Adjust	Connect to OUT1 for fixed 50ms timeout (D3); capacitor on CSRT sets custom delay (e.g., 0.1μF → ~100ms).
7 / GND	Ground Reference	Main analog/digital ground; EP must be soldered to PCB ground plane for thermal and electrical integrity.
8 / RESET	Supervisory Reset Output	Push-pull or open-drain active-low output; asserts when OUT1 drops below 92.5% nominal or watchdog expires.
9, 10 / WDS1, WDS0	Watchdog Window Ratio Select	Binary inputs selecting window ratio (e.g., WDS1=H/WDS0=L → 8:1 ratio) - unique to MAX6791/MAX6792.
11 / WDI	Watchdog Input	Edge-sensitive input; transition required within tWD1/tWD2 window - failure triggers RESET for tRP duration.
12 / HOLD	Self-Hold Control	Active-low input; forces OUT1 ON even after ENABLE1 goes low - eliminates need for external latch circuitry.
13, 14 / OUT2	Regulator 2 Output	Fixed 5V output; 150mA max; independent of OUT1 - enables dual-rail supply for mixed-signal ICs.
15 / ENABLE2	OUT2 Enable Input	Active-high; internal 0.5μA pulldown - allows independent sequencing of second output.
16 / PFI	Power-Fail Input	Analog input referenced to 1.231V; use resistor divider from battery to set custom undervoltage warning threshold.
17, 18 / IN	Main Regulator Input	Accepts 5V–72V; bypass with ≥1μF ceramic capacitor close to pins to suppress transients.
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; internal 0.5μA pulldown - primary ON/OFF control for main regulator output.

Key Features

Feature	Design Value
Windowed Watchdog Timer	Enables detection of both fast (tWDI < tWD1) and slow (tWDI > tWD2) WDI faults - prevents false resets from noise or timing jitter.
HOLD Self-Hold Function	Allows ignition-switch-controlled startup followed by software-independent hold state - eliminates external latching components.
Dual Independent Enables	ENABLE1 and ENABLE2 permit separate power sequencing of OUT1 and OUT2 - critical for multi-rail SoC boot order compliance.
Reverse-Battery Protection	GATEP drives external pFET to block −12V/−24V battery reversal - achieves near-zero forward drop vs. Schottky diode solutions.
Capacitor-Adjustable Supervision	CSRT and CSWT pins support precise tuning of reset and watchdog timeouts using standard NP0/C0G capacitors - avoids trimming resistors.

Applications

Engine Control Unit (ECU)	Body Control Module (BCM)
Use Scenario: Powering 32-bit MCU, CAN transceiver, and sensor interface in under-hood ECU exposed to 72V load-dump events and −40°C to +125°C ambient. IC Role / Device Role / Timing Role: Dual-output LDO + supervisor providing clean 5V/5V rails and deterministic reset during cold-crank (6V) and transient overvoltage. Use Value: 68μA quiescent current extends battery life in sleep mode; HOLD function sustains power during ignition cycling without firmware intervention.	Use Scenario: Supplying microcontroller, LIN transceiver, and LED drivers in door module with wake-on-LIN capability and battery monitoring. IC Role / Device Role / Timing Role: Primary regulator with PFI-based battery voltage monitoring and programmable PFO assertion for graceful shutdown before deep discharge. Use Value: Adjustable 1.8V–11V output supports diverse peripherals; windowed watchdog prevents spurious resets from LIN bus noise.
Advanced Driver Assistance System (ADAS) Camera ECU	Automotive Infotainment Head Unit
Use Scenario: Powering image sensor, ISP, and security MCU in front-facing camera module subject to vibration, thermal cycling, and EMI. IC Role / Device Role / Timing Role: High-PSRR (69dB @ 100Hz) dual LDO delivering low-noise 3.3V/1.8V rails; RESET ensures safe boot after power interruption. Use Value: 5mm × 5mm TQFN-EP package fits tight board space; AEC-Q100 qualification guarantees reliability in safety-critical vision systems.	Use Scenario: Biasing audio codec, display driver, and Bluetooth/Wi-Fi SoC in head unit with multiple wake sources and thermal constraints. IC Role / Device Role / Timing Role: Dual-regulator supervisor managing rail sequencing, brownout recovery, and watchdog supervision of application processor. Use Value: Independent ENABLE1/ENABLE2 allows staggered power-up; thermal shutdown (+165°C) protects against enclosure overheating.

Engine Control Unit (ECU)

Body Control Module (BCM)

Use Scenario: Powering 32-bit MCU, CAN transceiver, and sensor interface in under-hood ECU exposed to 72V load-dump events and −40°C to +125°C ambient.

IC Role / Device Role / Timing Role: Dual-output LDO + supervisor providing clean 5V/5V rails and deterministic reset during cold-crank (6V) and transient overvoltage.

Use Value: 68μA quiescent current extends battery life in sleep mode; HOLD function sustains power during ignition cycling without firmware intervention.

Use Scenario: Supplying microcontroller, LIN transceiver, and LED drivers in door module with wake-on-LIN capability and battery monitoring.

IC Role / Device Role / Timing Role: Primary regulator with PFI-based battery voltage monitoring and programmable PFO assertion for graceful shutdown before deep discharge.

Use Value: Adjustable 1.8V–11V output supports diverse peripherals; windowed watchdog prevents spurious resets from LIN bus noise.

Advanced Driver Assistance System (ADAS) Camera ECU

Automotive Infotainment Head Unit

Use Scenario: Powering image sensor, ISP, and security MCU in front-facing camera module subject to vibration, thermal cycling, and EMI.

IC Role / Device Role / Timing Role: High-PSRR (69dB @ 100Hz) dual LDO delivering low-noise 3.3V/1.8V rails; RESET ensures safe boot after power interruption.

Use Value: 5mm × 5mm TQFN-EP package fits tight board space; AEC-Q100 qualification guarantees reliability in safety-critical vision systems.

Use Scenario: Biasing audio codec, display driver, and Bluetooth/Wi-Fi SoC in head unit with multiple wake sources and thermal constraints.

IC Role / Device Role / Timing Role: Dual-regulator supervisor managing rail sequencing, brownout recovery, and watchdog supervision of application processor.

Use Value: Independent ENABLE1/ENABLE2 allows staggered power-up; thermal shutdown (+165°C) protects against enclosure overheating.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output automotive LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6792TPVD1+	Same pinout and package; identical windowed watchdog, but offers selectable 3.3V/5V/adjustable OUT1 + fixed 5V OUT2.	Preferred where 3.3V main rail is required instead of 5V; same HOLD/ENABLE2 functionality and thermal rating.	Select MAX6792TPVD1+ if system requires 3.3V for MCU core voltage and retains all MAX6791TPVD1+ supervision features.
TLV70733PDQNR	Single-output, 200mA, 2.5V–5.5V input only; no watchdog, RESET, HOLD, or automotive temp range - lacks supervision and high-VIN capability.	Suitable only for non-automotive, low-voltage, single-rail applications with external reset IC required.	Not a functional substitute; use only in cost-sensitive consumer designs without load-dump, wide-temp, or supervision requirements.

Compared with MAX6792TPVD1+, the MAX6791TPVD1+ provides identical supervision and packaging but targets 5V-centric dual-rail systems; compared with TLV70733PDQNR, it delivers full automotive-grade supervision, 72V tolerance, and dual outputs - making it irreplaceable in AEC-Q100-compliant ECUs.

Availability

MAX6791TPVD1+ is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and infotainment head units requiring stable component supply under automotive qualification and extended temperature operation.

Supply support for MAX6791TPVD1+ 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, automotive, and communications applications.

The MAX6791–MAX6796 family was engineered specifically for automotive power-supply supervision - integrating high-input-voltage LDOs, windowed watchdogs, HOLD logic, and reverse-battery protection into a single AEC-Q100-qualified package.

FAQ

What output voltage options does the MAX6791TPVD1+ support?

The MAX6791TPVD1+ supports fixed 5V on both OUT1 and OUT2 outputs. OUT1 can alternatively be configured as adjustable (1.8V–11V) using an external resistor divider on the SET1 pin. The "V" in TPVD1+ denotes a 5V preset for OUT1 and 5V fixed for OUT2, confirmed in Maxim's ordering guide and electrical characteristics tables.

Does the MAX6791TPVD1+ include reverse-battery protection?

Yes, the MAX6791TPVD1+ integrates reverse-battery protection via its GATEP pin, which drives an external p-channel MOSFET to block negative input voltages. This eliminates the need for series Schottky diodes, reducing forward voltage drop and power loss - a key feature verified in the Functional Diagram and Absolute Maximum Ratings sections of the datasheet.

How does the HOLD function operate in the MAX6791TPVD1+?

The HOLD input on the MAX6791TPVD1+ is active-low. When pulled low after initial enable, it forces OUT1 to remain ON even if ENABLE1 is subsequently deasserted. Releasing HOLD shuts down OUT1. This self-holding behavior is implemented internally - no external latch or capacitor is needed - and is explicitly documented in the Enable and Hold Inputs section and Table 3 of the datasheet.

What is the watchdog timeout configuration for the MAX6791TPVD1+?

The MAX6791TPVD1+ features a windowed watchdog timer with two timeout thresholds: tWD1 (fast fault, e.g., 6.25ms min) and tWD2 (slow fault, 280ms min). WDS0 and WDS1 pins select the window ratio (e.g., 8:1). This dual-threshold architecture - unique to MAX6791/MAX6792 - is confirmed in the Watchdog Timer section and Functional Diagram on page 12 of the datasheet.

Is the MAX6791TPVD1+ AEC-Q100 qualified?

The MAX6791TPVD1+ is not individually listed as AEC-Q100 qualified in the provided documentation; however, related variants MAX6795TPLD2/V+ and MAX6795TPSD2/V+ are explicitly marked "/V+" for automotive qualification. The MAX6791TPVD1+ shares the same 20-pin TQFN-EP package, −40°C to +125°C operating range, and automotive-focused features - but formal AEC-Q100 certification applies only to /V+ suffix parts per Maxim's ordering information table.

MAX6791TPVD1+ 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:: 1.575V, 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)

MAX6791TPVD1+ FAQ

1.How can I place an order for MAX6791TPVD1+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6791TPVD1+ 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 MAX6791TPVD1+ reliable?

The price and inventory of MAX6791TPVD1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6791TPVD1+ is usually 5 days.

3.What payment methods are accepted for MAX6791TPVD1+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6791TPVD1+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6791TPVD1+?

MAX6791TPVD1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6791TPVD1+ 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 MAX6791TPVD1+?

For technical support, including MAX6791TPVD1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6791TPVD1+ requirements.

6.How does Aetrix verify that MAX6791TPVD1+ is sourced from the original manufacturer or authorized distributors?

All MAX6791TPVD1+ 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 MAX6791TPVD1+ meets industry standards.

7.What is the process for return or replacement of MAX6791TPVD1+?

All MAX6791TPVD1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6791TPVD1+, 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 MAX6791TPVD1+ part is unused and in its original packaging.

Return procedure for MAX6791TPVD1+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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