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Analog Devices Inc./Maxim Integrated MAX6795TPWD1+T
- Part No.:
- MAX6795TPWD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6795TPWD1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,176
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Product details
Overview
MAX6795TPWD1+T from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions (RESET, watchdog, power-fail comparator, and hold control), designed for automotive systems. It operates from 5V to 72V input, delivers up to 300mA output current, features 68μA quiescent current, and supports fixed (5V/3.3V/2.5V/1.8V) or adjustable (1.8V–11V) output voltage. It is used in engine control units (ECUs) and body electronics where load-dump resilience and low-power supervision are critical.
For engineers reviewing the MAX6795TPWD1+T datasheet, MAX6795TPWD1+T pinout, MAX6795TPWD1+T application, or MAX6795TPWD1+T equivalent, key selection criteria include its AEC-Q100-qualified 20-pin TQFN package, 420mV typical dropout at 100mA, capacitor-adjustable reset/watchdog timeout, HOLD-enabled self-holding circuit, and -40°C to +125°C operation.
Technical Context
The MAX6795TPWD1+T integrates a high-voltage LDO regulator with precision supervisory blocks: a RESET output triggered by OUT voltage drop below 92.5%/87.5% thresholds, a watchdog timer with fixed 280ms (min) or capacitor-adjustable timeout, and a power-fail comparator referenced to 1.231V. Its HOLD input enables latch-up behavior without external components, while ENABLE provides standard ON/OFF control.
It implements reverse-battery protection via GATEP-driven pFET, includes thermal shutdown (+165°C), short-circuit current limiting (480mA max), and output overvoltage protection (1.05×VOUT). All supervisory timing (reset and watchdog) is internally trimmed or externally programmable using CSRT/CSWT pins with ramp-current-based capacitor charging.
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 typ - enables always-on functionality in battery-powered automotive modules. |
| Output Current | 300mA max - sufficient to power microcontrollers, CAN transceivers, and sensors directly. |
| Dropout Voltage | 420mV typ at 100mA - maintains regulation under high VIN/low VOUT conditions (e.g., 12V→5V). |
| Reset Threshold Accuracy | ±1.5% over -40°C to +125°C - ensures reliable brownout detection across full automotive temperature range. |
| Watchdog Timeout | 280ms min (fixed) or capacitor-adjustable - configurable fault-detection window for diverse MCU firmware cycles. |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood and transmission-control applications. |
Pinout & Package
MAX6795TPWD1+T is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected to GND for improved thermal dissipation (2.7W capability). The package meets AEC-Q100 Grade 0 requirements and supports reflow soldering at +260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT | Main regulated output (1.8V–11V fixed or adjustable); requires ≥10μF ceramic bypass to GND. |
| 3 | SET | Feedback node for adjustable output; grounded for preset voltages (5V/3.3V/2.5V/1.8V). |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout programming node; connect to OUT or add capacitor to GND for adjustable period. |
| 6 | CSRT | Reset timeout programming node; same function as CSWT but for RESET assertion duration. |
| 7 | GND | Analog/digital ground reference; connects to EP for thermal path. |
| 8 | RESET | Active-low push-pull or open-drain reset output; asserts during brownout or watchdog fault. |
| 11 | WDI | Watchdog input; rising/falling edge must occur within timeout window to prevent RESET assertion. |
| 12 | HOLD | Active-low latch enable; forces regulator ON even after ENABLE goes low - enables self-holding circuits. |
| 16 | PFI | Power-fail comparator input; set threshold via resistive divider to monitor battery or pre-regulated rail. |
| 17,18 | IN | Main input supply (5V–72V); bypass with 1μF ceramic capacitor to GND. |
| 19 | GATEP | pFET gate drive output; controls external p-channel MOSFET for reverse-battery protection. |
| 20 | ENABLE | Active-high regulator enable; internally pulled down (0.5μA sink) - driven by ignition signal or MCU GPIO. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 68μA enables >10-year battery standby life in always-on automotive modules. |
| Integrated HOLD function | Eliminates need for external latching circuitry - reduces BOM count and PCB area in ECU designs. |
| Capacitor-programmable timing | CSRT/CSWT pins allow precise, production-tunable reset and watchdog timeouts without trimming resistors. |
| Reverse-battery protection driver | GATEP output drives pFET to block reverse current - replaces lossy series diode with <50mΩ RDS(on) solution. |
| AEC-Q100 qualified | Qualified per Grade 0 (-40°C to +125°C) - certified for safety-critical automotive power domains. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Powers MCU, CAN transceiver, and analog sensors in gasoline/diesel engine management systems exposed to 72V load-dump events. IC Role / Device Role / Timing Role: Primary 5V/3.3V power source with integrated RESET supervision and watchdog monitoring of MCU firmware execution. Use Value: 72V input tolerance and 68μA IQ eliminate need for upstream DC-DC pre-regulator and reduce system power loss by >30% vs. legacy solutions. | Use Scenario: Supplies image sensor, ISP, and Ethernet PHY in front-facing ADAS camera operating behind vehicle grille. IC Role / Device Role / Timing Role: Single-point power and supervision IC delivering stable 1.8V/3.3V rails while detecting brownout and software hang conditions. Use Value: HOLD function enables ignition-controlled power sequencing without external logic; thermal rating supports +105°C ambient operation. |
| Body Control Module (BCM) | Electric Power Steering (EPS) Controller |
Use Scenario: Powers door module MCU and LIN transceivers in centralized body electronics architecture. IC Role / Device Role / Timing Role: Always-on LDO with programmable reset timeout and power-fail warning (PFO) for graceful shutdown during battery disconnect. Use Value: PFI comparator with 1.231V reference allows accurate battery voltage monitoring using only two resistors - no ADC required. | Use Scenario: Supplies torque-sensing ASIC and motor gate drivers in EPS systems requiring functional safety compliance. IC Role / Device Role / Timing Role: Safety-relevant power supervisor providing dual watchdog windows (fast/slow fault detection) and thermal shutdown. Use Value: Windowed watchdog (on MAX6791/MAX6792 variants) not applicable here; MAX6795TPWD1+T uses standard timeout - confirmed by part number suffix D1 indicating fixed 280ms watchdog. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage linear regulator with supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6795TPSD2/V+ | Same 20-pin TQFN package, but preset 3.3V output and 12.5ms reset timeout (D2); AEC-Q100 qualified (/V+). | Used where fixed 3.3V rail and longer reset hold-off are required (e.g., infotainment SoC power sequencing). | Select MAX6795TPWD1+T for adjustable output or 5V/1.8V/2.5V presets; choose MAX6795TPSD2/V+ only if 3.3V + 12.5ms reset is mandatory and AEC-Q100 is required. |
| TLV70733PDQNR | Lower voltage (2.5V–5.5V IN), 200mA output, no watchdog or HOLD; SOT-23-6 package. | Suitable only for non-automotive, low-voltage, low-current applications without supervision needs. | Not a functional alternative: lacks 72V input, watchdog, HOLD, RESET, and AEC-Q100 qualification - avoid for automotive use cases. |
Compared with MAX6795TPSD2/V+, MAX6795TPWD1+T offers identical package and supervision features but differs in output voltage option (W = 1.8V preset) and reset timeout (D1 = 35µs), making it optimal for low-voltage sensor rails requiring fast reset response; TLV70733PDQNR is unsuitable due to missing high-voltage, supervision, and automotive qualification capabilities.
Availability
MAX6795TPWD1+T is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and body control modules requiring stable component supply across extended temperature and high-reliability automotive environments.
Supply support for MAX6795TPWD1+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX6791–MAX6796 product line was designed specifically for automotive power-supply supervision - integrating high-input-voltage regulation, ultra-low IQ, and robust fault-monitoring features into a single AEC-Q100-qualified device.
FAQ
What output voltage options does the MAX6795TPWD1+T support?
The MAX6795TPWD1+T supports preset output voltages of 1.8V, 2.5V, 3.3V, or 5.0V - the 'W' in the part number indicates the 1.8V fixed option. It also supports adjustable output from 1.8V to 11V using an external resistor divider on the SET pin. Output accuracy is ±1.5% over temperature and load, verified across -40°C to +125°C.
Does the MAX6795TPWD1+T include reverse-battery protection?
Yes, the MAX6795TPWD1+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 13.8V to 18.8V clamp voltage and can sink/source sufficient current to fully enhance common automotive pFETs.
How is the watchdog timeout configured on the MAX6795TPWD1+T?
The MAX6795TPWD1+T watchdog timeout is fixed at 280ms (minimum) and cannot be windowed - confirmed by its 'D1' suffix (indicating 35µs reset timeout) and absence of WDS0/WDS1 pins in its pinout. The timeout is selected via internal logic; CSWT pin connects to OUT for fixed mode or to a capacitor for adjustable mode, but D1-suffix devices default to fixed 280ms unless capacitor is applied.
What is the purpose of the HOLD pin on the MAX6795TPWD1+T?
The HOLD pin on the MAX6795TPWD1+T is an active-low input that enables self-holding behavior: once the regulator is enabled via ENABLE, pulling HOLD low sustains regulation even if ENABLE returns low. Releasing HOLD shuts down the output. This eliminates external latch circuitry in ignition-controlled systems - a key design feature validated in automotive ECU reference schematics.
Is the MAX6795TPWD1+T AEC-Q100 qualified?
No, the MAX6795TPWD1+T is not AEC-Q100 qualified - the '/V+' suffix denotes AEC-Q100 qualification, and this part lacks that designation. However, it is fully specified from -40°C to +125°C, includes automotive-grade thermal/shutdown protection, and shares the same 20-pin TQFN package and electrical specs as qualified variants like MAX6795TPLD2/V+, making it suitable for non-safety-critical automotive applications where qualification is not mandated.
MAX6795TPWD1+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:
- 1
- Voltage - Threshold:
- 1.665V, 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)
MAX6795TPWD1+T FAQ
1.How can I place an order for MAX6795TPWD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6795TPWD1+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 MAX6795TPWD1+T reliable?
The price and inventory of MAX6795TPWD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6795TPWD1+T is usually 5 days.
3.What payment methods are accepted for MAX6795TPWD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6795TPWD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6795TPWD1+T?
MAX6795TPWD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6795TPWD1+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 MAX6795TPWD1+T?
For technical support, including MAX6795TPWD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6795TPWD1+T requirements.
6.How does Aetrix verify that MAX6795TPWD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6795TPWD1+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 MAX6795TPWD1+T meets industry standards.
7.What is the process for return or replacement of MAX6795TPWD1+T?
All MAX6795TPWD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6795TPWD1+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 MAX6795TPWD1+T part is unused and in its original packaging.
Return procedure for MAX6795TPWD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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