My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6791TPVD1+T
- Part No.:
- MAX6791TPVD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6791TPVD1+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,626
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6791TPVD1+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems. It delivers up to 150mA per output across a 5V–72V input range, consumes only 68μA quiescent current, and features fixed 5V/3.3V output options (this variant: 3.3V OUT1, fixed 5V OUT2), reset output with 87.5% threshold, and windowed watchdog timer. It operates in -40°C to +125°C and supports load-dump survival.
For engineers reviewing the MAX6791TPVD1+T datasheet, MAX6791TPVD1+T pinout, MAX6791TPVD1+T application, or MAX6791TPVD1+T equivalent, key selection considerations include its dual-rail 3.3V/5V regulation, AEC-Q100-aligned thermal robustness (165°C shutdown), capacitor-adjustable reset/watchdog timeouts, HOLD-enabled self-holding circuitry, and reverse-battery protection via GATEP-driven pFET - all in a 5mm × 5mm TQFN-20EP package.
Technical Context
The MAX6791TPVD1+T implements two independent LDO regulators: OUT1 is preset to 3.3V (T/S option) with SET1 feedback for adjustment, while OUT2 is fixed at 5V. Its supervisory block includes a windowed watchdog (tWD1 = 50ms min / tWD2 = 280ms min) with WDS0/WDS1 ratio selection and WD-DIS disable control, plus a RESET output asserting low on undervoltage or watchdog fault with programmable timeout (CSRT).
It integrates ENABLE1/ENABLE2 for per-rail control, HOLD for latch-on behavior, PFI/PFO for external power-fail monitoring (1.231V threshold), and GATEP for reverse-battery protection using an external p-channel MOSFET. All protections - thermal shutdown (165°C), short-circuit current limiting (~240mA), and output overvoltage clamping (1.05×VOUT) - are fully specified across the -40°C to +125°C junction range.
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 functionality in battery-sensitive applications |
| Output Current | 150mA per output - supports dual-rail MCU core/I/O supply with margin |
| Dropout Voltage | 840mV typ @ 100mA (dual) - ensures regulation down to VIN = VOUT + 0.84V |
| Reset Threshold | 87.5% of nominal OUT1 - asserts RESET when 3.3V rail drops below ~2.89V |
| Watchdog Timeout | Windowed: 50ms (fast) / 280ms (slow) - detects both stuck-high and stuck-low WDI faults |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive environments |
Pinout & Package
Package: 20-pin thermally enhanced TQFN-EP (5mm × 5mm, exposed pad), rated for 2.7W dissipation at TA = +70°C with 33.3mW/°C derating above.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | 3.3V fixed output (T/S option); requires ≥10μF ceramic capacitor to GND |
| OUT2 | Regulator 2 Output | Fixed 5V output; independent of OUT1, supports separate loads |
| ENABLE1 / ENABLE2 | Active-High Enable Inputs | Control OUT1 and OUT2 independently; each pulled down by 0.5μA internal sink |
| HOLD | Active-Low Hold Input | Forces regulator ON after initial enable - enables self-holding without external latching circuit |
| RESET | Active-Low Reset Output | Push-pull or open-drain; asserts low during undervoltage or watchdog fault, holds for CSRT-defined timeout |
| WDI / WDS0 / WDS1 / WD-DIS | Watchdog Control Inputs | Enable windowed timing (WDS0/WDS1), disable (WD-DIS), or feed pulse train (WDI) |
| GATEP | pFET Gate Drive | Drives external p-channel MOSFET for reverse-battery protection - eliminates series diode loss |
| PFI / PFO | Power-Fail Monitor I/O | PFI accepts resistive divider for custom brownout detection; PFO provides open-drain alert |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent outputs | 3.3V (OUT1) + 5V (OUT2) rails with separate EN/hold control - simplifies multi-voltage domain power sequencing |
| Windowed watchdog timer | Detects both fast (tWDI < 50ms) and slow (tWDI > 280ms) WDI faults - prevents silent firmware lockup |
| Self-holding circuit via HOLD | Eliminates need for external latch or microcontroller GPIO to maintain regulator state after ignition key release |
| Reverse-battery protection drive | GATEP output controls external pFET - achieves <100mV drop vs. >400mV diode solution, improving efficiency |
| Capacitor-adjustable timeouts | CSRT and CSWT pins accept external capacitors to set reset and watchdog periods - replaces multiple BOM variants |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powering MCU, CAN transceiver, and sensor interface in engine bay under wide temperature and load-dump conditions. IC Role / Device Role / Timing Role: Dual-rail LDO regulator + system supervisor - provides clean 3.3V/5V rails and monitors MCU health via watchdog/reset. Use Value: 72V input tolerance and 125°C operation ensure reliability during cold cranking and under-hood heat; HOLD enables ignition-triggered latching. | Use Scenario: Supplying vision processor, radar SoC, and camera modules in front-end ADAS domain controller. IC Role / Device Role / Timing Role: Primary power supervisor - regulates critical voltage domains and asserts hardware reset on brownout or firmware hang. Use Value: Windowed watchdog prevents false resets from periodic interrupts while catching true lockups; PFI enables early battery voltage warning. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Managing power to door module microcontrollers, LIN transceivers, and LED drivers in vehicle body electronics. IC Role / Device Role / Timing Role: Always-on regulator with ultra-low IQ - maintains real-time clock and wake-up logic during sleep mode. Use Value: 68μA quiescent current minimizes battery drain during extended parking; GATEP enables reverse-polarity protection without diode loss. | Use Scenario: Providing stable 3.3V core and 5V peripheral rails to application processor and audio codec in infotainment system. IC Role / Device Role / Timing Role: Dual-output supervisor - sequences power-up, monitors supply integrity, and triggers safe shutdown on PFI alert. Use Value: Adjustable reset timeout (via CSRT) allows precise coordination with processor boot time; thermal shutdown protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6792TPVD1+T | Same pinout and features, but with windowed watchdog ratio set to 16:1 (vs. 8:1 in MAX6791TPVD1+T); identical 3.3V/5V outputs and TQFN-20EP package | Preferred where tighter watchdog window (e.g., 25ms/400ms) improves fault coverage for safety-critical firmware | Select MAX6792TPVD1+T if system requires faster fast-fault detection than 50ms; otherwise MAX6791TPVD1+T is drop-in compatible |
| TLV70733PDPWR | Single 3.3V LDO only (no dual output, no watchdog, no RESET), 200mA, 2.5V–5.5V input, SOT-23-5 package - lacks supervision, automotive temp range, and high-voltage capability | Only suitable for non-safety, low-voltage, non-automotive applications where supervision is handled externally | Not a functional replacement; use only in cost-sensitive, non-automotive designs without watchdog or reset requirements |
Compared with MAX6792TPVD1+T, the MAX6791TPVD1+T offers a wider fast-watchdog window (50ms vs. 25ms), easing timing margin for interrupt-driven firmware; versus TLV70733PDPWR, it delivers full automotive-grade supervision, dual-rail regulation, and 72V survivability - making it irreplaceable in AEC-Q100-compliant systems.
Availability
MAX6791TPVD1+T is available at Aetrix Electronics and suitable for automotive ECU, ADAS domain controllers, body control modules, and infotainment head units requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX6791TPVD1+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 demanding industrial, automotive, and communications applications.
The MAX6791–MAX6796 product line targets automotive power-supply supervision, delivering high-input-voltage LDO regulation with integrated watchdog, reset, power-fail detection, and reverse-battery protection in a single compact package.
FAQ
What output voltages does the MAX6791TPVD1+T provide?
The MAX6791TPVD1+T provides two regulated outputs: OUT1 is preset to 3.3V (T/S option per ordering code 'V'), and OUT2 is fixed at 5V. Both outputs are independently controllable via ENABLE1 and ENABLE2. The 3.3V output can be adjusted from 1.8V to 11V using an external resistor divider connected to SET1, though the MAX6791TPVD1+T is factory-configured for 3.3V operation.
Does the MAX6791TPVD1+T support reverse-battery protection?
Yes, the MAX6791TPVD1+T supports reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. This configuration eliminates the forward voltage drop and power loss of a series diode, achieving near-zero dropout reverse protection. The device specifies IN-to-GATEP clamp and drive voltages to ensure reliable MOSFET control across the full 5V–72V input range.
How is the watchdog timer configured on the MAX6791TPVD1+T?
The MAX6791TPVD1+T features a windowed watchdog timer controlled by WDS0, WDS1, and WD-DIS inputs. For the MAX6791TPVD1+T (window ratio 8:1), fast timeout (tWD1) is 50ms and slow timeout (tWD2) is 280ms. WDI must toggle within this window; violation asserts RESET for the CSRT-defined period. WD-DIS can disable the function entirely, and CSWT allows capacitor-based timeout adjustment.
What is the purpose of the HOLD pin on the MAX6791TPVD1+T?
The HOLD pin on the MAX6791TPVD1+T enables a self-holding circuit: once ENABLE1 is asserted and OUT1 becomes active, pulling HOLD low latches the regulator ON - maintaining output even if ENABLE1 is later deasserted. Releasing HOLD (pulling high or leaving open) shuts down OUT1. This eliminates external latch components and supports ignition-key-triggered power persistence in automotive applications.
Is the MAX6791TPVD1+T qualified for automotive use?
Yes, the MAX6791TPVD1+T is designed for automotive applications and operates across the full AEC-Q100 Grade 0 temperature range (-40°C to +125°C). While not individually certified, it shares design, process, and qualification data with AEC-Q100-qualified variants like MAX6795TPLD2/V+, and includes automotive-specific features: 72V load-dump tolerance, reverse-battery protection drive, and robust thermal/short-circuit protection.
MAX6791TPVD1+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:
- 1.575V, 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+T FAQ
1.How can I place an order for MAX6791TPVD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6791TPVD1+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 MAX6791TPVD1+T reliable?
The price and inventory of MAX6791TPVD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6791TPVD1+T is usually 5 days.
3.What payment methods are accepted for MAX6791TPVD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6791TPVD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6791TPVD1+T?
MAX6791TPVD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6791TPVD1+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 MAX6791TPVD1+T?
For technical support, including MAX6791TPVD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6791TPVD1+T requirements.
6.How does Aetrix verify that MAX6791TPVD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6791TPVD1+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 MAX6791TPVD1+T meets industry standards.
7.What is the process for return or replacement of MAX6791TPVD1+T?
All MAX6791TPVD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6791TPVD1+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 MAX6791TPVD1+T part is unused and in its original packaging.
Return procedure for MAX6791TPVD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6791TPVD1+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
