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Analog Devices Inc./Maxim Integrated MAX6795TPYD0+T
- Part No.:
- MAX6795TPYD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6795TPYD0+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,601
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Product details
Overview
The MAX6795TPYD0+T from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions-including reset, watchdog timer, power-fail detection, and hold functionality-designed for automotive systems. It operates from 5V to 72V input, delivers up to 300mA output current, features 68μA quiescent current, and provides a preset 3.3V output with 87.5% reset threshold and 3.125ms fixed reset timeout. It is used in engine control units (ECUs) and body control modules requiring robust brownout immunity and microprocessor supervision.
For engineers reviewing the MAX6795TPYD0+T datasheet, MAX6795TPYD0+T pinout, MAX6795TPYD0+T application, or MAX6795TPYD0+T equivalent, key selection criteria include its AEC-Q100-qualified 20-pin TQFN package, 3.3V fixed output with ±2.5% tolerance over –40°C to +125°C, 420mV typical dropout at 100mA, and dual-mode watchdog support with disable capability.
Technical Context
The MAX6795TPYD0+T implements a single LDO regulator with internal pFET pass element and precision bandgap reference, enabling stable 3.3V output across wide input voltage (5V–72V) and load (0–300mA) ranges. Its supervisory block integrates a comparator-based reset generator with fixed 87.5% threshold relative to VOUT, a capacitor-adjustable or internally fixed 3.125ms reset timeout (D1), and a 280ms min watchdog timeout with WD-DIS input for functional disable.
It includes ENABLE and HOLD inputs for ignition-controlled self-holding operation: when ENABLE goes high and HOLD is pulled low, the regulator remains active even after ENABLE returns low-enabling latch-free start-up sequencing. The device also integrates reverse-battery protection drive (GATEP), power-fail comparator (PFI/PFO), and thermal/overcurrent/overvoltage protection-all specified for automotive ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external clamping |
| Output Voltage | 3.3V (fixed), ±2.5% over –40°C to +125°C - matches common MCU I/O rail requirements |
| Max Output Current | 300mA - supports multiple low-power peripherals or sensor clusters from single rail |
| Quiescent Current | 68μA (typ) - enables always-on ECU subsystems meeting ISO 16750-2 sleep-current limits |
| Dropout Voltage | 420mV (typ) at 100mA - sustains regulation down to VIN = 3.72V for 3.3V output |
| Reset Threshold | 87.5% of VOUT (2.888V min at 3.3V) - ensures reliable µP reset before logic supply collapse |
| Reset Timeout | 3.125ms (D1 code) - meets JEDEC JESD85 minimum reset pulse width for ARM Cortex-M MCUs |
| Watchdog Timeout | 280ms (min, fixed) - aligns with automotive ASAM MCD-2 MC standard for fault-detection latency |
Pinout & Package
MAX6795TPYD0+T is housed in a thermally enhanced 20-pin TQFN-EP (5mm × 5mm, 0.5mm pitch) with exposed pad (EP) connected internally to GND. The package supports 2.7W continuous power dissipation and is AEC-Q100 qualified for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT | Regulator output (3.3V); requires ≥10µF ceramic capacitor to GND for stability |
| 3 | SET | Feedback node; tied to GND for 3.3V preset mode (Y code) |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V |
| 5 | CSWT | Watchdog timeout adjust; connected to OUT for fixed 280ms timeout (D0 code) |
| 6 | CSRT | Reset timeout adjust; connected to OUT for fixed 3.125ms timeout (D1 code) |
| 7 | GND | Analog/digital ground reference; must be low-impedance connection to EP |
| 8 | RESET | Active-low push-pull reset output; drives µP reset pin directly |
| 9, 10 | N.C. | No internal connection - leave unconnected or float |
| 11 | WDI | Watchdog input; requires edge transition every ≤280ms to prevent reset assertion |
| 12 | HOLD | Active-low hold enable; latches regulator ON after initial ENABLE assertion |
| 16 | PFI | Power-fail comparator input; set threshold via resistive divider to monitor battery or pre-regulator |
| 17, 18 | IN | Main input (5V–72V); bypass with ≥1µF ceramic capacitor to GND |
| 19 | GATEP | pFET gate driver; controls external PMOS for reverse-battery protection |
| 20 | ENABLE | Active-high enable; internal 0.5µA pulldown allows direct connection to ignition switch |
| EP | Exposed Pad | Internally connected to GND; must be soldered to PCB ground plane for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current (68μA) | Enables compliance with ISO 16750-2 Class D sleep-current requirements (<100μA) in always-on vehicle networks |
| 72V absolute max input rating | Eliminates need for external TVS clamping during 12V/24V automotive load-dump events (ISO 7637-2 Pulse 5a) |
| Integrated HOLD function | Supports ignition-key-triggered latching without external MOSFET or RC timing components |
| Adjustable power-fail detection (PFI) | Allows precise battery voltage monitoring (e.g., 11.5V warning threshold) using two external resistors |
| Reverse-battery protection drive (GATEP) | Directly controls external p-channel MOSFET to replace lossy series diode, improving efficiency by >3% |
| AEC-Q100 Grade 1 qualification | Guarantees operation from –40°C to +125°C junction temperature for under-hood deployment |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powers 32-bit MCU, CAN transceiver, and analog sensors in gasoline/diesel engine management system. IC Role / Device Role / Timing Role: Primary 3.3V LDO with reset supervision and watchdog monitoring of MCU firmware execution. Use Value: Maintains regulated 3.3V output during cranking (VIN dips to 6V) and load-dump (VIN spikes to 72V), while asserting RESET if VOUT drops below 2.89V or WDI stalls. |
Use Scenario: Supplies infotainment interface MCU, door-lock actuators, and LIN transceivers in centralized body electronics. IC Role / Device Role / Timing Role: Single-rail supervisor providing power sequencing, brownout detection, and fail-safe shutdown signaling. Use Value: Uses PFI to trigger early warning at 11.8V battery level, enabling graceful shutdown before deep discharge; HOLD enables ignition-synchronized wake-up. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Electric Power Steering (EPS) Controller |
|
Use Scenario: Powers image signal processor (ISP), CMOS image sensor, and SerDes link in rear-view camera module. IC Role / Device Role / Timing Role: High-reliability 3.3V regulator with thermal shutdown and overvoltage protection for vision processing chain. Use Value: Delivers 300mA peak current during image capture bursts; thermal protection prevents malfunction during prolonged sun exposure (>85°C ambient). |
Use Scenario: Supplies motor control MCU, gate drivers, and current-sense amplifiers in steer-by-wire EPS unit. IC Role / Device Role / Timing Role: Safety-critical power supervisor with dual watchdog windowing (via compatible MAX6791 variant) and redundant reset assertion. Use Value: Enables ASIL-B compliant monitoring: RESET pulses on WDI timeout or VOUT sag, while GATEP ensures reverse-polarity fault containment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage linear regulator with supervisory functions applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6795TPSD2/V+ | Same 3.3V output and D2 reset timeout (12.5ms), but AEC-Q100 qualified (/V+) and automotive-grade screening | Required for production automotive programs needing full PPAP documentation and lot traceability | Select MAX6795TPSD2/V+ for Tier-1 OEM designs where qualification evidence and long-term supply assurance are mandatory |
| TLE42754G | 5V fixed output, 450mA rating, 70μA IQ, but no watchdog or HOLD function; SO-8 package | Lacks integrated supervision-requires external reset IC and discrete hold circuitry for equivalent functionality | Choose TLE42754G only when 5V rail is needed and supervisory features are implemented separately; not drop-in for MAX6795TPYD0+T |
Compared with MAX6795TPYD0+T, MAX6795TPSD2/V+ adds AEC-Q100 certification and longer-lifecycle commitment, while TLE42754G trades supervision integration for higher output current and simpler BOM-but increases design complexity and board area.
Availability
MAX6795TPYD0+T is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and electric power steering controllers requiring stable component supply under extended temperature and high-voltage stress conditions.
Supply support for MAX6795TPYD0+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 automotive, industrial, and communications markets.
The MAX679x family targets automotive power-supply supervision, delivering high-voltage LDO regulation with integrated reset, watchdog, power-fail, and reverse-battery protection in compact thermally enhanced packages.
FAQ
What output voltage does the MAX6795TPYD0+T provide?
The MAX6795TPYD0+T provides a fixed 3.3V output voltage. The "Y" in the part number denotes the 3.3V preset option, with output accuracy of ±2.5% over –40°C to +125°C. It does not require external feedback resistors, as SET is internally connected to GND for this configuration. The MAX6795TPYD0+T maintains regulation down to 3.72V input at full 300mA load due to its 420mV typical dropout voltage.
How is the reset timeout period configured on the MAX6795TPYD0+T?
The MAX6795TPYD0+T uses the "D1" suffix to indicate a fixed 3.125ms reset timeout period. This is achieved by connecting the CSRT pin to the OUT pin (as specified in the datasheet's selector guide). No external capacitor is required. The reset output remains low for exactly 3.125ms after VOUT rises above the 87.5% threshold (2.888V), satisfying JEDEC JESD85 timing requirements for most 32-bit automotive MCUs.
Does the MAX6795TPYD0+T support watchdog disable functionality?
Yes, the MAX6795TPYD0+T supports watchdog disable via the WD-DIS pin (Pin 9). Driving WD-DIS low disables the watchdog timer entirely, preventing RESET assertion due to WDI timeout. When WD-DIS is high or connected to OUT, the watchdog remains active with a 280ms minimum timeout. This feature allows safe operation during debug or bootloader modes where WDI toggling cannot be guaranteed.
What package type and thermal performance does the MAX6795TPYD0+T offer?
The MAX6795TPYD0+T is supplied in a 20-pin TQFN-EP package (5mm × 5mm, 0.5mm pitch) with exposed pad. At TA = +70°C, it delivers 2.67W continuous power dissipation (derated by 33.3mW/°C above +70°C). Its thermal resistance θJA is optimized for PCBs with 1-in² copper pour under the EP, enabling reliable operation at full 300mA load even at +105°C ambient-critical for under-hood automotive placement.
Can the MAX6795TPYD0+T be used in reverse-battery protection circuits?
Yes, the MAX6795TPYD0+T includes dedicated GATEP (Pin 19) output that drives the gate of an external p-channel MOSFET to implement reverse-battery protection. When reverse polarity is applied, the internal circuitry pulls GATEP low, turning off the PMOS and blocking current flow. This eliminates the 0.4V–0.7V forward drop of a series diode, improving efficiency and reducing heat generation in 12V/24V automotive systems.
MAX6795TPYD0+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:
- 2.188V, 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)
MAX6795TPYD0+T FAQ
1.How can I place an order for MAX6795TPYD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6795TPYD0+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 MAX6795TPYD0+T reliable?
The price and inventory of MAX6795TPYD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6795TPYD0+T is usually 5 days.
3.What payment methods are accepted for MAX6795TPYD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6795TPYD0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6795TPYD0+T?
MAX6795TPYD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6795TPYD0+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 MAX6795TPYD0+T?
For technical support, including MAX6795TPYD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6795TPYD0+T requirements.
6.How does Aetrix verify that MAX6795TPYD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6795TPYD0+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 MAX6795TPYD0+T meets industry standards.
7.What is the process for return or replacement of MAX6795TPYD0+T?
All MAX6795TPYD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6795TPYD0+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 MAX6795TPYD0+T part is unused and in its original packaging.
Return procedure for MAX6795TPYD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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