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Analog Devices Inc./Maxim Integrated MAX6795TPWD0+
- Part No.:
- MAX6795TPWD0+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6795TPWD0+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6795TPWD0+ from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions (RESET, watchdog, power-fail detection) 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 - ideal for engine control units under load-dump conditions.
For engineers reviewing the MAX6795TPWD0+ datasheet, MAX6795TPWD0+ pinout, MAX6795TPWD0+ application, or MAX6795TPWD0+ equivalent, key selection considerations include its AEC-Q100-qualified 20-pin TQFN package, 280ms fixed watchdog timeout (D0 variant), 35μs reset assertion delay, thermal/short-circuit/overvoltage protection, and HOLD-enabled self-holding circuit implementation without external components.
Technical Context
The MAX6795TPWD0+ implements a single high-side pFET-based LDO regulator with dropout voltage as low as 84mV at 20mA (typ) and 1.2V at 300mA (typ), optimized for wide-input automotive battery rails. Its supervisory block integrates a fixed-threshold RESET output (92.5% of VOUT), capacitor-adjustable or internally fixed reset timeout (35μs–200ms), and a non-windowed watchdog timer with 280ms minimum timeout (CSWT = OUT).
It features dual enable logic: ENABLE asserts regulation, while HOLD sustains output after ENABLE release - enabling ignition-key-triggered latching behavior. The device includes reverse-battery protection via GATEP-driven pFET, PFI/PFO comparator for battery monitoring, and internal 1.231V reference for precision thresholding across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external clamping. |
| Output Current | 300mA continuous - sufficient for MCU core + peripheral rail in body control modules. |
| Quiescent Current | 68μA (typ) - enables always-on functionality in low-power sleep modes. |
| Dropout Voltage | 84mV (typ) at 20mA; 1.2V (typ) at 300mA - maintains regulation during cold-crank (6V battery) at full load. |
| Reset Timeout | 35μs (fixed D0 option) - ensures fast microprocessor reset assertion during brownout. |
| Watchdog Timeout | 280ms (min, fixed) - provides robust firmware supervision without external timing components. |
| Operating Temp | –40°C to +125°C - fully specified for under-hood automotive environments. |
Pinout & Package
MAX6795TPWD0+ is housed in a 5mm × 5mm, 20-pin thermally enhanced TQFN-EP package (exposed pad connected to GND), rated for 2.7W power dissipation and qualified per AEC-Q100.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT | Regulator output - delivers up to 300mA; requires ≥10μF ceramic capacitor to GND. |
| 3 | SET | Feedback input - connect to GND for preset voltage (5V/3.3V/2.5V/1.8V) or resistive divider for 1.8V–11V adjustment. |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI falls below 1.231V; used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust - tied to OUT for fixed 280ms timeout (D0 configuration). |
| 6 | CSRT | Reset timeout adjust - tied to OUT for fixed 35μs timeout (D0 configuration). |
| 7 | GND | Analog/digital ground - connects to exposed pad for thermal and electrical integrity. |
| 8 | RESET | Active-low reset output - push-pull type; asserts when OUT drops below 92.5% VOUT or watchdog expires. |
| 11 | WDI | Watchdog input - requires edge transition every ≤280ms to prevent reset assertion. |
| 12 | HOLD | Active-low hold input - forces regulator ON even after ENABLE goes low; enables self-holding ignition circuits. |
| 16 | PFI | Power-fail comparator input - accepts resistive divider to set custom undervoltage threshold (e.g., battery monitoring). |
| 17,18 | IN | Main regulator input - bypass with 1μF ceramic capacitor; handles 5V–72V transients. |
| 19 | GATEP | pFET gate drive - controls external p-channel MOSFET for reverse-battery protection (no series diode needed). |
| 20 | ENABLE | Active-high enable - internal 0.5μA pulldown; driven by ignition signal to initiate regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 68μA enables >10-year battery standby life in always-on automotive modules. |
| Integrated reverse-battery protection | GATEP output drives external pFET - eliminates 0.3–0.7V diode drop and associated heat in battery feed paths. |
| Self-holding circuit support | HOLD input sustains regulation after ENABLE release - implements ignition-key latching without relays or external logic. |
| Fixed 35μs reset assertion | D0 variant guarantees sub-50μs response to output collapse - meets ASIL-B timing requirements for safety-critical resets. |
| AEC-Q100 qualification | Qualified for automotive Grade 0 (–40°C to +125°C) - validated for under-hood ECU, ADAS, and gateway applications. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU and CAN transceiver in gasoline/diesel engine management system exposed to 72V load-dump events. IC Role / Device Role / Timing Role: Primary 5V/3.3V LDO regulator with integrated RESET and watchdog - ensures deterministic MCU boot and runtime fault recovery. Use Value: 72V input range and thermal shutdown prevent failure during cranking; 68μA IQ extends stop-start battery life. | Use Scenario: Supplies door module MCU, LIN transceiver, and LED drivers in vehicle access system with wake-on-LIN capability. IC Role / Device Role / Timing Role: Always-on regulator with HOLD-latched enable - maintains power during ignition-off but allows controlled shutdown via software. Use Value: Self-holding eliminates need for external latch circuit; PFI monitoring triggers graceful shutdown before battery depletion. |
| Advanced Driver Assistance System (ADAS) Camera | Automotive Gateway Controller |
Use Scenario: Powers image sensor and ISP in rear-view camera exposed to temperature cycling and vibration. IC Role / Device Role / Timing Role: Single 3.3V output regulator with RESET assertion on brownout - prevents corrupted frame capture during voltage sag. Use Value: 35μs reset delay ensures immediate MCU reset; 125°C rating supports sealed camera housing operation. | Use Scenario: Supplies multi-core application processor and Ethernet PHY in central vehicle gateway handling CAN FD, LIN, and Ethernet. IC Role / Device Role / Timing Role: High-current (300mA) 1.8V/3.3V regulator with watchdog supervision - monitors host processor health and forces recovery on hang. Use Value: 280ms watchdog timeout balances responsiveness and noise immunity; GATEP enables reverse-polarity protection without efficiency loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage supervisory regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6795TPSD2/V+ | Same family, 5V fixed output, 12.5ms reset timeout (D2), AEC-Q100 qualified. | Targets systems requiring longer reset hold time (e.g., complex bootloader sequences). | Select when 12.5ms reset assertion is required instead of 35μs; identical pinout and thermal performance. |
| TLD6512-2ES | Infineon 65V LDO with 250mA output, 70μA IQ, no integrated watchdog or HOLD function. | Lacks self-holding and windowed supervision - requires external circuitry for ignition latching. | Choose only if watchdog/HOLD features are unnecessary and cost is primary driver; not drop-in compatible. |
Compared with MAX6795TPWD0+, MAX6795TPSD2/V+ offers extended reset duration for complex firmware initialization, while TLD6512-2ES reduces integration but demands external components for equivalent functionality - making MAX6795TPWD0+ optimal for space-constrained, safety-aware automotive nodes.
Availability
MAX6795TPWD0+ is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS cameras, and gateway controllers requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6795TPWD0+ 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 automotive, industrial, and communications markets.
The MAX6791–MAX6796 product line targets automotive power management with ultra-low IQ, high-voltage tolerance, and integrated functional safety features - specifically engineered for ECU, BCM, and ADAS subsystems operating in harsh environments.
FAQ
What output voltage options does the MAX6795TPWD0+ support?
The MAX6795TPWD0+ supports fixed output voltages of 5V, 3.3V, 2.5V, or 1.8V - selected by grounding the SET pin - or an adjustable output from 1.8V to 11V using an external resistive divider between OUT, SET, and GND. The "D0" suffix confirms it uses the 35μs fixed reset timeout, not the output voltage; voltage option is determined by the third character in the full ordering code (e.g., "T" = 3.3V). MAX6795TPWD0+ is configured for 3.3V output.
Does the MAX6795TPWD0+ include reverse-battery protection?
Yes, the MAX6795TPWD0+ integrates reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET to block reverse current flow. This eliminates the need for a series Schottky diode, reducing voltage drop and power loss. The GATEP output is designed to interface directly with standard automotive pFETs and is fully characterized across the –40°C to +125°C range in the MAX6795TPWD0+ datasheet.
How does the HOLD function work in the MAX6795TPWD0+?
The HOLD input in the MAX6795TPWD0+ is an active-low signal that sustains regulator output even after ENABLE is deasserted. When ENABLE is pulled high to start regulation and HOLD is then pulled low, the MAX6795TPWD0+ remains ON regardless of ENABLE state. Releasing HOLD (pulling high or leaving open) shuts down the output. This enables self-holding ignition circuits without external components - a key feature confirmed for the MAX6795TPWD0+ in its functional diagram and Detailed Description section.
Is the MAX6795TPWD0+ AEC-Q100 qualified?
Yes, the MAX6795TPWD0+ is AEC-Q100 qualified (Grade 0, –40°C to +125°C), as explicitly stated in the Benefits and Features section and Ordering Information table of the official datasheet. This qualification covers stress testing for automotive reliability, including temperature cycling, humidity bias, and ESD - confirming its suitability for under-hood and safety-critical applications where the MAX6795TPWD0+ is deployed.
What is the watchdog timeout configuration for MAX6795TPWD0+?
The MAX6795TPWD0+ uses the "D0" suffix to indicate its reset timeout is fixed at 35μs, and its watchdog timeout is fixed at 280ms (minimum) - achieved by connecting CSWT to OUT (as defined in Table 2 of the datasheet). This configuration is verified in the Electrical Characteristics table under "Normal Watchdog Timeout Period" with tWD2 = 280.0–520.0ms (CSWT = OUT/OUT1). No external capacitor is required for this default watchdog setting in the MAX6795TPWD0+.
MAX6795TPWD0+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tube
- 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:
- 35µs Typical
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6795TPWD0+ FAQ
1.How can I place an order for MAX6795TPWD0+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6795TPWD0+ 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 MAX6795TPWD0+ reliable?
The price and inventory of MAX6795TPWD0+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6795TPWD0+ is usually 5 days.
3.What payment methods are accepted for MAX6795TPWD0+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6795TPWD0+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6795TPWD0+?
MAX6795TPWD0+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6795TPWD0+ 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 MAX6795TPWD0+?
For technical support, including MAX6795TPWD0+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6795TPWD0+ requirements.
6.How does Aetrix verify that MAX6795TPWD0+ is sourced from the original manufacturer or authorized distributors?
All MAX6795TPWD0+ 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 MAX6795TPWD0+ meets industry standards.
7.What is the process for return or replacement of MAX6795TPWD0+?
All MAX6795TPWD0+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6795TPWD0+, 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 MAX6795TPWD0+ part is unused and in its original packaging.
Return procedure for MAX6795TPWD0+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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