My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6791TPVD4+T
- Part No.:
- MAX6791TPVD4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6791TPVD4+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,966
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6791TPVD4+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 across a 5V–72V input range, features a 5V fixed OUT1 and 5V fixed OUT2, consumes only 68μA quiescent current, and includes capacitor-adjustable 200ms reset timeout (D4) - ideal for engine control units under load-dump conditions.
For engineers reviewing the MAX6791TPVD4+T datasheet, MAX6791TPVD4+T pinout, MAX6791TPVD4+T application, or MAX6791TPVD4+T equivalent, key selection criteria include its dual 5V outputs, AEC-Q100-qualified thermal performance (−40°C to +125°C), watchdog disable capability, HOLD self-hold functionality, and TQFN-20EP package with exposed pad for 2.7W dissipation.
Technical Context
The MAX6791TPVD4+T implements two independent LDO regulators: OUT1 (preset 5V, adjustable 1.8V–11V via SET1) and OUT2 (fixed 5V). Its reset circuit asserts low when either output drops below 92.5% of nominal (L-grade threshold = 4.625V), then holds low for 200ms after recovery. The watchdog timer supports windowed operation (tWD1/tWD2) or fixed 280ms timeout, configurable via WDS0/WDS1 pins and disabled via WD-DIS.
It integrates reverse-battery protection via GATEP-driven pFET, thermal shutdown at +165°C with 20°C hysteresis, short-circuit current limiting (200mA per output), and output overvoltage protection clamping at 105–110% of VOUT. ENABLE1/ENABLE2 and HOLD inputs enable ignition-controlled self-holding without external components.
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 systems with ultra-low standby power loss. |
| Output Current | 150mA per output (OUT1 & OUT2) - supports dual-rail microcontroller peripherals. |
| Reset Timeout | 200ms (D4 option) - ensures reliable µP reset hold time after brownout recovery. |
| Dropout Voltage | 840mV typ @ 100mA (dual mode) - maintains regulation during cold-crank battery dips. |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive environments. |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced for 2.7W continuous dissipation. |
Pinout & Package
MAX6791TPVD4+T uses a 20-pin thermally enhanced TQFN package (5mm × 5mm, exposed pad) rated for 2.7W dissipation at +70°C ambient. The exposed pad (EP) must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT1 | Dual-regulator primary output: fixed 5V (L-grade), 150mA max; requires ≥10µF ceramic output capacitor. |
| 3 | SET1 | Feedback input for OUT1 - grounded for preset 5V; connected to resistive divider for adjustable output (1.8V–11V). |
| 4 | PFO | Active-low open-drain power-fail output - asserts when PFI < 1.231V; used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust - tied to OUT1 for fixed 280ms timeout; capacitor to GND enables adjustment. |
| 6 | CSRT | Reset timeout adjust - tied to OUT1 for fixed 200ms (D4); capacitor to GND enables user-defined timeout. |
| 7 | GND | Analog/digital ground reference - connects to EP for optimal thermal path. |
| 8 | RESET | Active-low reset output - push-pull or open-drain; asserts when OUT1/OUT2 < 4.625V (L-grade) and holds for 200ms. |
| 9, 10 | WDS1, WDS0 | Windowed watchdog ratio select - sets fast/slow fault thresholds (MAX6791-specific); unused in MAX6793–MAX6796. |
| 11 | WDI | Watchdog input - requires edge transition within timeout period; resets watchdog counter on valid toggle. |
| 12 | HOLD | Active-low hold input - forces regulator ON even if ENABLE1 goes low; releases ON state when released. |
| 13, 14 | OUT2 | Dual-regulator secondary output: fixed 5V, 150mA max; requires ≥10µF ceramic output capacitor. |
| 15 | ENABLE2 | Active-high enable for OUT2 - internal 0.5µA pulldown; driven high to activate second output rail. |
| 16 | PFI | Power-fail comparator input - referenced to 1.231V internal threshold; sets system shutdown voltage via resistor divider. |
| 17, 18 | IN | Main regulator input - accepts 5V–72V; bypassed with 1µF ceramic capacitor to GND. |
| 19 | GATEP | pFET gate drive - controls external p-channel MOSFET for reverse-battery protection (no diode drop). |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5µA pulldown; ignition-switched control for primary rail. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 5V outputs with independent enables | Enables isolated power domains for MCU core + I/O peripherals without external sequencing logic. |
| Self-holding HOLD input | Eliminates need for external latch circuitry - sustains OUT1/OUT2 after ignition key release until HOLD is released. |
| Capacitor-adjustable 200ms reset timeout (D4) | Guarantees sufficient reset assertion time for slow-starting automotive MCUs after battery recovery. |
| Windowed watchdog (MAX6791 only) | Detects both stuck-high and stuck-low WDI faults - critical for safety-critical ECU firmware monitoring. |
| Reverse-battery protection via GATEP | Drives external pFET to block −12V/−24V battery reversal - replaces lossy series diode with <100mΩ RDS(on) path. |
| AEC-Q100 qualified thermal design | Validated for −40°C to +125°C operation with 2.7W thermal dissipation - suitable for under-hood placement. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering 5V microcontroller core and CAN transceiver in gasoline/diesel engine management systems exposed to 72V load-dump spikes. IC Role / Device Role / Timing Role: Dual 5V LDO regulator with integrated reset supervision and watchdog - provides clean, sequenced, fault-monitored power rails. Use Value: 68μA quiescent current prevents battery drain during vehicle sleep mode; 72V input tolerance eliminates need for upstream TVS clamping. |
Use Scenario: Supplying 5V rails to door module microcontrollers, LIN transceivers, and LED drivers in 12V/24V commercial vehicles. IC Role / Device Role / Timing Role: Dual-output supervisor with HOLD latching - enables ignition-triggered power-up and retains state during brief battery disconnects. Use Value: HOLD input sustains power during start-stop cycles; PFI comparator triggers orderly shutdown before deep battery discharge. |
| Advanced Driver Assistance Systems (ADAS) | Telematics Control Unit (TCU) |
Use Scenario: Powering vision processor and radar sensor interface ICs in front-camera modules requiring stable 5V under wide temperature and voltage variation. IC Role / Device Role / Timing Role: High-reliability dual LDO with thermal/overcurrent protection - delivers regulated 5V while monitoring supply integrity. Use Value: −40°C to +125°C specification ensures operation in sealed, unventilated enclosures; 2.7W TQFN package handles sustained 150mA loads at +85°C ambient. |
Use Scenario: Providing primary 5V supply and backup monitoring for cellular modem, GNSS receiver, and eCall subsystems in fleet telematics hardware. IC Role / Device Role / Timing Role: Supervisory regulator with watchdog and power-fail detection - ensures modem reset during brownouts and initiates safe data flush before shutdown. Use Value: WD-DIS pin allows software-controlled watchdog disable during firmware updates; PFO output signals low-battery condition to host processor. |
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 |
|---|---|---|---|
| MAX6793TPVD4+T | No windowed watchdog; uses WD-DIS pin instead of WDS0/WDS1; same D4 reset timeout and dual 5V outputs. | Lacks fast/slow fault discrimination - suitable where basic watchdog suffices and pin count must be minimized. | Select MAX6793TPVD4+T when windowed watchdog is unnecessary and cost-sensitive designs require simplified watchdog control. |
| TLV70733PDQNR | Single 3.3V output, 300mA, 5.5V max input, no watchdog/reset supervision, SOT-23-5 package. | Not automotive-qualified; lacks high-voltage input, dual outputs, or supervisory features - limited to low-voltage auxiliary rails. | Choose TLV70733PDQNR only for non-safety, non-automotive 3.3V point-of-load regulation where size and cost outweigh supervision needs. |
Compared with MAX6793TPVD4+T, the MAX6791TPVD4+T adds windowed watchdog for enhanced fault coverage but requires two additional control pins; versus TLV70733PDQNR, it delivers full automotive-grade dual-rail supervision at higher voltage and temperature, with no functional overlap in safety-critical use cases.
Availability
MAX6791TPVD4+T is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6791TPVD4+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-supply supervision - integrating dual LDOs, reset, watchdog, power-fail detection, and reverse-battery protection into a single AEC-Q100-qualified TQFN package.
FAQ
What output voltages does the MAX6791TPVD4+T support?
The MAX6791TPVD4+T provides two fixed 5V outputs: OUT1 and OUT2. Both are preset to 5V (L-grade), with OUT1 also configurable from 1.8V to 11V using an external resistive divider on SET1. The device does not support other factory-fixed voltages (e.g., 3.3V or 2.5V) in this specific variant - only the 5V/5V dual configuration per ordering code TPVD4+T.
How is the 200ms reset timeout implemented in the MAX6791TPVD4+T?
The MAX6791TPVD4+T implements its 200ms reset timeout (D4 option) by connecting CSRT to OUT1, selecting the internally fixed timeout value. This timing is guaranteed over −40°C to +125°C and remains stable regardless of supply voltage or load - no external capacitor is required unless a custom timeout is needed.
Does the MAX6791TPVD4+T support reverse-battery protection without external components?
The MAX6791TPVD4+T provides reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. While the IC contains the control circuitry, a discrete pFET is required - no diode or additional IC is needed, eliminating forward-voltage drop and heat generation associated with traditional series diodes.
Can the watchdog function be disabled on the MAX6791TPVD4+T?
Yes, the watchdog function on the MAX6791TPVD4+T can be disabled. For the MAX6791 variant, drive WD-DIS low or tie WDS0 high and WDS1 low. This disables watchdog monitoring while preserving all other supervisory functions including RESET and PFO operation.
What is the thermal performance of the MAX6791TPVD4+T in its TQFN package?
The MAX6791TPVD4+T in its 20-pin TQFN-EP (5mm × 5mm) package dissipates up to 2.7W continuously at +70°C ambient. With proper PCB copper area connected to the exposed pad (EP), it maintains safe junction temperatures up to +125°C ambient - validated per AEC-Q100 requirements for under-hood automotive deployment.
MAX6791TPVD4+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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6791TPVD4+T FAQ
1.How can I place an order for MAX6791TPVD4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6791TPVD4+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 MAX6791TPVD4+T reliable?
The price and inventory of MAX6791TPVD4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6791TPVD4+T is usually 5 days.
3.What payment methods are accepted for MAX6791TPVD4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6791TPVD4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6791TPVD4+T?
MAX6791TPVD4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6791TPVD4+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 MAX6791TPVD4+T?
For technical support, including MAX6791TPVD4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6791TPVD4+T requirements.
6.How does Aetrix verify that MAX6791TPVD4+T is sourced from the original manufacturer or authorized distributors?
All MAX6791TPVD4+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 MAX6791TPVD4+T meets industry standards.
7.What is the process for return or replacement of MAX6791TPVD4+T?
All MAX6791TPVD4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6791TPVD4+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 MAX6791TPVD4+T part is unused and in its original packaging.
Return procedure for MAX6791TPVD4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6791TPVD4+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…
