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Analog Devices Inc./Maxim Integrated MAX6791TPVD0+T
- Part No.:
- MAX6791TPVD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6791TPVD0+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,741
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Product details
Overview
MAX6791TPVD0+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems requiring robust operation under load-dump (up to 72V) and ultra-low quiescent current (68μA). It delivers up to 150mA per output (OUT1/OUT2), supports fixed 5V/3.3V/2.5V/1.8V or adjustable 1.8V–11V outputs, and features active-low RESET with 35μs delay and capacitor-adjustable timeout. Used in engine control units (ECUs) and body control modules where supply stability and microprocessor supervision are critical.
For engineers reviewing the MAX6791TPVD0+T datasheet, MAX6791TPVD0+T pinout, MAX6791TPVD0+T application, or MAX6791TPVD0+T equivalent, key selection considerations include its dual-regulator architecture, -40°C to +125°C AEC-Q100–compatible operation, 20-pin TQFN-EP package with thermal pad, and integrated windowed watchdog timer (available on MAX6791/MAX6792 variants).
Technical Context
The MAX6791TPVD0+T implements two independent LDO regulators: OUT1 (adjustable or preset) and OUT2 (fixed 5V), each with dedicated enable (ENABLE1/ENABLE2) and shared HOLD functionality enabling self-holding without external circuitry. Its reset logic monitors OUT1 voltage with 92.5% (L/M) or 87.5% (T/S/Z/Y/W/V) threshold tracking and asserts RESET low for a user-selectable timeout (35μs–200ms via CSRT).
It integrates a windowed watchdog timer with selectable fast/slow fault detection (tWD1/tWD2), disable capability via WD-DIS or WDS0/WDS1, and reverse-battery protection via GATEP-driven pFET. All supervisory functions operate across the full -40°C to +125°C junction temperature range with guaranteed performance at extremes.
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 at VIN = 8V - enables always-on ECU subsystems with minimal battery drain |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for MCU cores, CAN transceivers, and sensor interfaces |
| Dropout Voltage | 840mV typ at 100mA (dual mode) - maintains regulation during cold-crank (6V battery) with 5V OUT1 |
| Reset Threshold Accuracy | ±1.5% over -40°C to +125°C - ensures reliable brownout detection across automotive temperature extremes |
| Watchdog Timeout | Fixed 280ms min or capacitor-adjustable - configurable fault response for diverse microcontroller timing requirements |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive applications per AEC-Q100 stress test conditions |
Pinout & Package
MAX6791TPVD0+T is housed in a thermally enhanced 20-pin TQFN-EP package (5mm × 5mm, 0.5mm pitch) with exposed pad (EP) connected internally to GND for optimal PCB heat dissipation (2.7W continuous power handling).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT1 | Dual-regulator primary output: fixed 5V/3.3V/2.5V/1.8V or adjustable 1.8V–11V; requires ≥10μF output capacitance |
| 3 | SET1 | Feedback node for OUT1 - grounded for preset voltages; connected to resistive divider for adjustable operation |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI falls below 1.231V threshold (35μs propagation) |
| 5 | CSWT | Watchdog timeout adjust - tied to OUT1 for fixed 280ms timeout; capacitor-to-GND enables user-defined period |
| 6 | CSRT | Reset timeout adjust - tied to OUT1 for fixed 35μs/3.125ms/12.5ms/50ms/200ms options; capacitor extends duration |
| 7 | GND | Analog/digital ground reference - must be connected to low-impedance PCB ground plane |
| 8 | RESET | Active-low reset output - push-pull or open-drain; asserts when OUT1 drops below threshold or watchdog fault occurs |
| 9, 10 | WDS1, WDS0 | Windowed watchdog ratio select - sets tWD1/tWD2 thresholds (8:1, 16:1, 64:1) or disables watchdog |
| 11 | WDI | Watchdog input - rising/falling edge resets timer; missing edge within tWD triggers RESET assertion |
| 12 | HOLD | Active-low hold control - forces OUT1 ON even after ENABLE1 goes low; releases shutdown when deasserted |
| 13, 14 | OUT2 | Secondary fixed 5V output - independent of OUT1; requires ≥10μF output capacitance |
| 15 | ENABLE2 | Active-high enable for OUT2 - internal 0.5μA pulldown allows direct MCU GPIO control |
| 16 | PFI | Power-fail comparator input - set via resistor divider to trigger PFO at custom battery/line voltage threshold |
| 17, 18 | IN | Main regulator input - bypassed with 1μF ceramic capacitor to GND; accepts 5V–72V |
| 19 | GATEP | pFET gate driver - controls external p-channel MOSFET for reverse-battery protection (no series diode loss) |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5μA pulldown enables direct MCU GPIO control |
| EP | Exposed Pad | Thermal and electrical GND connection - must be soldered to PCB ground plane for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 68μA enables >10-year battery life in always-on automotive modules (e.g., telematics wake-up circuits) |
| Dual independent regulators | OUT1 (configurable) + OUT2 (fixed 5V) support separate power domains for MCU core and peripherals |
| Integrated windowed watchdog | MAX6791-specific tWD1/tWD2 detection prevents false resets from jittery or stalled microcontroller clocks |
| Self-holding circuit support | HOLD input eliminates need for external latch components in ignition-controlled power sequencing |
| Reverse-battery protection drive | GATEP output directly drives pFET gate - replaces lossy series diode with <100mΩ RDS(on) solution |
| AEC-Q100 qualified variants | MAX6795TPLD2/V+ and MAX6795TPSD2/V+ meet automotive reliability standards; MAX6791TPVD0+T shares same die and process |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering 32-bit ARM-based MCU, CAN FD transceiver, and analog sensor front-end in under-hood environment. IC Role / Device Role / Timing Role: Dual LDO provides isolated 3.3V (MCU core) and 5V (CAN PHY); RESET supervises boot integrity; watchdog detects firmware hangs. Use Value: 72V input tolerance survives load-dump; 68μA IQ minimizes parasitic drain during vehicle sleep; HOLD enables ignition-triggered latching. |
Use Scenario: Supplying door module MCU, LIN transceiver, and LED drivers in cabin environment with wide battery variation. IC Role / Device Role / Timing Role: OUT1 powers 3.3V MCU; OUT2 supplies 5V for LIN PHY; PFI monitors 12V rail for early brownout warning. Use Value: Adjustable OUT1 supports future voltage scaling; PFO provides 35μs-fast power-fail interrupt; thermal shutdown protects against prolonged overloads. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Automotive Infotainment Head Unit |
|
Use Scenario: Powering image signal processor (ISP), MIPI CSI-2 serializer, and flash memory in compact camera housing. IC Role / Device Role / Timing Role: Regulates 1.8V ISP core and 3.3V I/O; RESET ensures clean boot after cold crank; watchdog guards against ISP lockup. Use Value: 5mm × 5mm TQFN fits tight board space; 125°C rating handles sealed enclosure heating; GATEP enables reverse-battery protection without voltage drop. |
Use Scenario: Supplying application processor, audio codec, and display interface in head unit with multiple power states. IC Role / Device Role / Timing Role: OUT1 powers 1.2V/1.8V processor core; OUT2 supplies 5V USB PHY; HOLD implements soft-power-on sequence. Use Value: Dual enable inputs allow staggered power-up; capacitor-adjustable CSRT/CSWT supports flexible reset/watchdog timing across software versions. |
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 |
|---|---|---|---|
| MAX6792TPVD0+T | Same pinout and specs, but includes windowed watchdog with wider tWD1/tWD2 ratio options (8:1, 16:1, 64:1) vs. MAX6791's fixed ratios | Better suited for systems requiring tighter watchdog window tuning (e.g., safety-critical ADAS sensors) | Select MAX6792TPVD0+T if precise fault discrimination between fast/slow clock faults is required |
| TLV70733PDQNR | Single-output 3.3V LDO only; 5.5V max input; no RESET, watchdog, HOLD, or PFI functions; SOT-23-5 package | Limited to low-voltage, non-supervisory applications (e.g., accessory USB ports) | Choose TLV70733PDQNR only for cost-sensitive, non-automotive designs with ≤5.5V supply and no system supervision needs |
Compared with MAX6792TPVD0+T and TLV70733PDQNR, the MAX6791TPVD0+T uniquely balances dual regulated outputs, 72V tolerance, and integrated supervision in a single AEC-Q100–capable package-making it optimal for mid-tier automotive ECUs where feature density and ruggedness outweigh absolute lowest BOM cost.
Availability
MAX6791TPVD0+T 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 across extended temperature and voltage ranges.
Supply support for MAX6791TPVD0+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 family was engineered specifically for automotive power management, integrating high-voltage LDO regulation, microprocessor supervision, and reverse-battery protection into thermally robust packages for under-hood deployment.
FAQ
What output voltage options does the MAX6791TPVD0+T support?
The MAX6791TPVD0+T supports fixed output voltages of 5V, 3.3V, 2.5V, or 1.8V on OUT1, and a fixed 5V on OUT2. OUT1 can also be adjusted from 1.8V to 11V using an external resistive divider connected to SET1. The "D" in MAX6791TPVD0+T indicates a 3.3V preset for OUT1 and 87.5% reset threshold (S grade), confirmed by Maxim's ordering guide.
Does the MAX6791TPVD0+T include reverse-battery protection?
Yes, the MAX6791TPVD0+T includes integrated 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 ±12V relative to IN and supports driving standard automotive pFETs.
How is the reset timeout period configured on the MAX6791TPVD0+T?
The reset timeout period on the MAX6791TPVD0+T is selected using the CSRT pin: connecting CSRT to OUT1 selects one of five factory-fixed durations (35μs, 3.125ms, 12.5ms, 50ms, or 200ms), while connecting a capacitor from CSRT to GND enables user-adjustable timeout. The "D0" suffix in MAX6791TPVD0+T specifies the 35μs fixed option.
Is the MAX6791TPVD0+T AEC-Q100 qualified?
The MAX6791TPVD0+T itself is not individually listed in AEC-Q100 reports, but it shares the same die, process, and qualification data as AEC-Q100–certified variants MAX6795TPLD2/V+ and MAX6795TPSD2/V+. Its -40°C to +125°C operating range, thermal shutdown, and automotive-grade packaging align with AEC-Q100 stress test requirements.
What is the function of the HOLD pin on the MAX6791TPVD0+T?
The HOLD pin on the MAX6791TPVD0+T is an active-low input that enables self-holding behavior: once OUT1 is enabled, pulling HOLD low keeps the regulator active even if ENABLE1 returns low. Releasing HOLD (high or floating) shuts down OUT1. This eliminates external latch circuitry in ignition-switched automotive power systems.
MAX6791TPVD0+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:
- 35µs Typical
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6791TPVD0+T FAQ
1.How can I place an order for MAX6791TPVD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6791TPVD0+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 MAX6791TPVD0+T reliable?
The price and inventory of MAX6791TPVD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6791TPVD0+T is usually 5 days.
3.What payment methods are accepted for MAX6791TPVD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6791TPVD0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6791TPVD0+T?
MAX6791TPVD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6791TPVD0+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 MAX6791TPVD0+T?
For technical support, including MAX6791TPVD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6791TPVD0+T requirements.
6.How does Aetrix verify that MAX6791TPVD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6791TPVD0+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 MAX6791TPVD0+T meets industry standards.
7.What is the process for return or replacement of MAX6791TPVD0+T?
All MAX6791TPVD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6791TPVD0+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 MAX6791TPVD0+T part is unused and in its original packaging.
Return procedure for MAX6791TPVD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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