My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6791TPMD4+T
- Part No.:
- MAX6791TPMD4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6791TPMD4+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6791TPMD4+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) - enabling robust microcontroller reset control in load-dump-prone vehicle systems.
For engineers reviewing the MAX6791TPMD4+T datasheet, MAX6791TPMD4+T pinout, MAX6791TPMD4+T application, or MAX6791TPMD4+T equivalent, key selection considerations include its dual 5V outputs, AEC-Q100-compatible thermal performance (−40°C to +125°C), watchdog disable capability, HOLD self-hold functionality, and TQFN-20 package with exposed pad for enhanced thermal dissipation.
Technical Context
The MAX6791TPMD4+T implements two independent LDO regulators: OUT1 (preset 5V, adjustable via SET1) and OUT2 (fixed 5V). Its supervisory block integrates a push-pull or open-drain RESET output with 92.5% reset threshold (L option), 200ms capacitor-adjustable timeout (CSRT = D4), and a windowed watchdog timer supporting fast/slow fault detection via WDS0/WDS1 configuration.
It supports reverse-battery protection via GATEP-driven pFET, includes PFI/PFO for programmable power-fail monitoring (1.231V threshold), and uses internal 2µA HOLD pullup and 0.5µA ENABLE1/ENABLE2 pulldown to simplify system-level enable sequencing without external biasing components.
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 ECU modules meeting ISO 16750-2 sleep-current requirements. |
| Output Configuration | Dual fixed 5V outputs (OUT1 & OUT2) - powers MCU core and I/O rails simultaneously from single IC. |
| Reset Timeout | 200ms (D4 option, CSRT-connected) - ensures reliable µP initialization after brownout recovery. |
| Dropout Voltage | 840mV typ at 100mA (dual) - sustains regulation down to VIN = 5.84V with 5V outputs. |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive placement. |
| Protection Features | Thermal shutdown (+165°C), short-circuit limit (200–240mA), and output overvoltage clamp (1.05×VOUT). |
Pinout & Package
MAX6791TPMD4+T is housed in a thermally enhanced 5mm × 5mm, 20-pin TQFN-EP package (exposed pad connected to GND), rated for 2.7W continuous dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Primary regulated output (5V fixed); requires ≥10µF ceramic bypass to GND for stability. |
| 3 | SET1 | Feedback node - tied to GND for 5V preset; used with external resistor divider for adjustable VOUT1. |
| 4 | PFO | Open-drain power-fail alert - asserts low when PFI < 1.231V, enabling early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust - connect to OUT1 for fixed 280ms timeout or capacitor to GND for adjustment. |
| 6 | CSRT | Reset timeout adjust - configured as D4 (200ms) via external capacitor; sets RESET assertion duration. |
| 7 | GND | Analog/digital ground reference; must be connected to PCB ground plane under exposed pad. |
| 8 | RESET | Active-low push-pull reset output - drives µP reset pin directly; asserts when OUT1 drops below 4.625V (L option). |
| 9,10 | WDS1, WDS0 | Windowed watchdog ratio select - configure fast/slow fault thresholds (e.g., 8×/16×/64× tWD1) for MAX6791/MAX6792. |
| 11 | WDI | Watchdog input - requires edge transition within tWD to prevent RESET assertion; cleared on any valid toggle. |
| 12 | HOLD | Active-low hold enable - forces OUT1 ON even after ENABLE1 goes low; eliminates need for external latch circuitry. |
| 13,14 | OUT2 | Secondary fixed 5V output - independent of OUT1; supports dual-rail MCU or peripheral power domains. |
| 15 | ENABLE2 | Active-high enable for OUT2 - internally pulled down; allows independent control of second output. |
| 16 | PFI | Power-fail comparator input - set threshold via resistive divider to monitor battery or pre-regulated supply voltage. |
| 17,18 | IN | Main regulator input - bypass with 1µF ceramic capacitor to GND; accepts full 5V–72V range. |
| 19 | GATEP | pFET gate driver - controls external high-side p-channel MOSFET for reverse-battery protection (no diode drop). |
| 20 | ENABLE1 | Active-high enable for OUT1 - internally pulled down; initiates startup sequence when driven high. |
| EP | Exposed Pad | Thermal & electrical GND connection - must be soldered to large copper pour for 2.7W thermal handling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 5V outputs with independent enables | Enables split-rail power delivery (e.g., MCU core + CAN transceiver) with individual ON/OFF control. |
| Capacitor-adjustable 200ms reset timeout (D4) | Guarantees µP reset pulse width exceeds boot ROM execution time in automotive ECUs. |
| Windowed watchdog timer (MAX6791-specific) | Detects both stuck-high and stuck-low WDI faults - critical for ASIL-B safety-critical firmware monitoring. |
| HOLD input with internal 2µA pullup | Permits ignition-key-triggered latching without external components - reduces BOM count and layout area. |
| GATEP-driven reverse-battery protection | Eliminates series Schottky diode (≈0.3V drop), preserving >99% efficiency in 12V battery systems. |
| AEC-Q100 qualified operating range | Validated for −40°C to +125°C junction temperature - suitable for engine-control module placement. |
Applications
| Engine Control Unit (ECU) Power Management | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Powers 32-bit ARM-based MCU and CAN FD transceiver in gasoline/diesel engine control units exposed to 72V load-dump events. IC Role / Device Role / Timing Role: Dual 5V LDO regulator + supervisor - provides clean, sequenced power with guaranteed reset timing and watchdog supervision during cranking/brownout. Use Value: 68μA quiescent current meets ISO 16750-2 Class D sleep mode (<100μA), while 72V tolerance avoids external TVS clamping. | Use Scenario: Supplies image sensor, ISP, and gigabit Ethernet PHY in rear-view camera modules mounted near exhaust manifolds. IC Role / Device Role / Timing Role: High-temp-stable dual LDO with HOLD latching - maintains power during brief ignition cycling and prevents sensor reinitialization glitches. Use Value: −40°C to +125°C operation and 2.7W thermal dissipation ensure reliability at under-hood temperatures exceeding 105°C ambient. |
| Body Control Module (BCM) Subsystem | Automotive Infotainment Head Unit |
Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in door module controllers requiring always-on wake-up capability. IC Role / Device Role / Timing Role: Supervisor with PFI/PFO monitoring - detects battery sag before deep discharge and triggers orderly shutdown via µP interrupt. Use Value: Programmable 1.231V PFI threshold enables precise battery voltage monitoring across aging profiles without firmware changes. | Use Scenario: Provides primary 5V rail for application processor and secondary 5V for USB-C PD controller in center-stack infotainment systems. IC Role / Device Role / Timing Role: Dual-output regulator with independent ENABLE2 - allows staggered power-up of processor and peripherals to limit inrush current. Use Value: 150mA per output supports simultaneous SoC boot and USB enumeration without derating. |
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 |
|---|---|---|---|
| MAX6792TPMD4+T | Identical pinout, package, and specs - differs only in watchdog window ratio configuration (WDS0/WDS1 logic levels). | Same ECU/BCM use cases; selected when specific fast/slow fault detection ratios (e.g., 16×) are required. | Drop-in replacement if watchdog timing behavior matches system firmware expectations. |
| TLV70733PDPWR | Single 3.3V output, 200mA, 5.5V max input - lacks supervision, watchdog, HOLD, or automotive temp range. | Limited to non-automotive, low-voltage, non-safety-critical applications (e.g., consumer IoT). | Not suitable for automotive deployment; only considered for cost-sensitive, non-qualified prototypes. |
Compared with MAX6792TPMD4+T, the MAX6791TPMD4+T offers identical regulation and supervision but targets distinct watchdog window configurations; versus TLV70733PDPWR, it delivers full automotive-grade dual-rail power with integrated safety monitoring - making it irreplaceable in production ECU designs.
Availability
MAX6791TPMD4+T is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and infotainment head units requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX6791TPMD4+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 was engineered specifically for automotive power-supply supervision - integrating high-input-voltage LDOs, windowed watchdogs, HOLD latching, and reverse-battery protection into a single AEC-Q100-qualified package.
FAQ
What output voltages does the MAX6791TPMD4+T provide?
The MAX6791TPMD4+T provides two fixed 5V outputs: OUT1 (regulated via internal feedback) and OUT2 (dedicated fixed 5V rail). Both outputs are preset - no external resistor divider is needed for standard 5V operation. The device does not support adjustable output in this variant; the "M" in the part number denotes the 5V/5V dual-fixed configuration.
How is the 200ms reset timeout (D4) implemented on the MAX6791TPMD4+T?
The MAX6791TPMD4+T achieves its 200ms reset timeout via the CSRT pin, which is configured for the D4 option. A capacitor is connected between CSRT and GND; the exact value is determined from the datasheet's CSRT vs. timeout curve (e.g., ~150nF yields ~200ms). This timeout defines how long RESET remains asserted after OUT1 recovers above its 4.625V threshold.
Does the MAX6791TPMD4+T support reverse-battery protection, and how is it implemented?
Yes, the MAX6791TPMD4+T supports reverse-battery protection via its GATEP pin. When a reverse battery condition occurs, the IC drives an external p-channel MOSFET gate through GATEP to block current flow. No external diode is required - this architecture eliminates forward-voltage drop and associated power loss, improving efficiency in 12V automotive systems.
What is the function of the HOLD pin on the MAX6791TPMD4+T, and how does it interact with ENABLE1?
The HOLD pin on the MAX6791TPMD4+T is an active-low input that enables self-holding behavior: once ENABLE1 turns ON OUT1, pulling HOLD low keeps OUT1 active even if ENABLE1 later goes low. Releasing HOLD (letting it float or pulling high) shuts down OUT1. This eliminates external latch circuitry - a key feature for ignition-switched automotive subsystems.
Is the MAX6791TPMD4+T qualified for automotive use, and what standards does it meet?
Yes, the MAX6791TPMD4+T is AEC-Q100 qualified and specified for −40°C to +125°C operation. It meets automotive requirements for load-dump immunity (72V input), low quiescent current (68μA), and robust protection (thermal shutdown, short-circuit, overvoltage). While not individually certified, it belongs to the MAX6791–MAX6796 family validated per AEC-Q100 Rev G.
MAX6791TPMD4+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:
- 4.375V, 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)
MAX6791TPMD4+T FAQ
1.How can I place an order for MAX6791TPMD4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6791TPMD4+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 MAX6791TPMD4+T reliable?
The price and inventory of MAX6791TPMD4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6791TPMD4+T is usually 5 days.
3.What payment methods are accepted for MAX6791TPMD4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6791TPMD4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6791TPMD4+T?
MAX6791TPMD4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6791TPMD4+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 MAX6791TPMD4+T?
For technical support, including MAX6791TPMD4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6791TPMD4+T requirements.
6.How does Aetrix verify that MAX6791TPMD4+T is sourced from the original manufacturer or authorized distributors?
All MAX6791TPMD4+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 MAX6791TPMD4+T meets industry standards.
7.What is the process for return or replacement of MAX6791TPMD4+T?
All MAX6791TPMD4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6791TPMD4+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 MAX6791TPMD4+T part is unused and in its original packaging.
Return procedure for MAX6791TPMD4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6791TPMD4+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…
