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Analog Devices Inc./Maxim Integrated MAX6795TPZD4+
- Part No.:
- MAX6795TPZD4+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6795TPZD4+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,715
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Product details
Overview
The MAX6795TPZD4+ from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions (RESET, watchdog, power-fail detection, 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 provides a fixed 5V output with 92.5% reset threshold and 200ms fixed reset timeout - ideal for engine control units and body electronics requiring robust brownout recovery.
For engineers reviewing the MAX6795TPZD4+ datasheet, MAX6795TPZD4+ pinout, MAX6795TPZD4+ application, or MAX6795TPZD4+ equivalent, key selection criteria include its AEC-Q100-qualified 20-pin TQFN package, -40°C to +125°C operation, 420mV typical dropout at 100mA, adjustable or preset output (5V/3.3V/2.5V/1.8V), and dual-mode watchdog with disable capability.
Technical Context
The MAX6795TPZD4+ implements a single LDO regulator with internal pFET pass element, thermal shutdown (165°C), short-circuit protection, and output overvoltage clamping at 1.05×VOUT. Its RESET output is push-pull active-low with fixed 200ms timeout (CSRT = D4), and reset threshold is preset to 4.625V (92.5% of 5V nominal) per ordering code 'Z'.
It integrates a fixed 280ms watchdog timeout (CSWT = OUT), configurable via WD-DIS pin, and supports self-holding via HOLD input tied to OUT. The device uses SET feedback for output voltage configuration and includes PFI/PFO for external power-fail monitoring with 1.231V internal reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external protection. |
| Output Voltage | Fixed 5.0V ±2.5% (L grade) - stable supply for MCU core/logic in harsh environments. |
| Max Output Current | 300mA continuous - sufficient for powering microcontrollers, CAN transceivers, and sensors. |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-sensitive automotive modules. |
| Reset Threshold | 4.625V (92.5% of 5V) - triggers reliable brownout detection before system instability. |
| Reset Timeout | 200ms (D4 code) - ensures sufficient processor reset hold time after voltage recovery. |
| Dropout Voltage | 420mV typ at 100mA - maintains regulation during cold-crank (6V battery) conditions. |
| Operating Temp | -40°C to +125°C - fully specified for under-hood automotive deployment. |
Pinout & Package
MAX6795TPZD4+ is housed in a thermally enhanced 20-pin TQFN package (5mm × 5mm, exposed pad), rated for 2.7W power dissipation and optimized for high-ambient automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT | Regulator output (5V); requires ≥10μF ceramic capacitor to GND for stability. |
| 3 | SET | Feedback node - grounded for 5V preset; connected to resistive divider for adjustable output. |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI falls below 1.231V reference. |
| 5 | CSWT | Watchdog timeout adjust - tied to OUT for fixed 280ms timeout (per D4 ordering). |
| 6 | CSRT | Reset timeout adjust - tied to OUT for fixed 200ms timeout (D4 code). |
| 7 | GND | Power and signal ground - must connect exposed pad (EP) to PCB ground plane. |
| 8 | RESET | Push-pull active-low reset - drives µP reset pin directly; no pull-up required. |
| 11 | WDI | Watchdog input - toggling within 280ms prevents reset assertion. |
| 12 | HOLD | Active-low hold control - keeps regulator on even after ENABLE goes low. |
| 16 | PFI | Power-fail comparator input - used with resistor divider to set custom brownout threshold. |
| 17,18 | IN | Main input - bypassed with 1μF ceramic capacitor to GND near pins. |
| 19 | GATEP | pFET gate driver - controls external reverse-battery protection MOSFET. |
| 20 | ENABLE | Active-high enable - internally pulled down; logic high initiates startup sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 68μA enables >10-year battery standby in always-on automotive modules. |
| Integrated hold function | HOLD pin allows self-holding circuit without external latch components or software intervention. |
| Dual-mode watchdog | Fixed 280ms timeout with WD-DIS pin disable - eliminates need for external timer IC. |
| Reverse-battery protection drive | GATEP output directly drives pFET gate - replaces lossy series diode with <50mΩ RDS(on) solution. |
| AEC-Q100 qualified | Qualified to Grade 0 (-40°C to +150°C junction) - validated for critical automotive subsystems. |
| Thermal & fault protection | Includes thermal shutdown (165°C), short-circuit current limit (480mA), and output overvoltage clamp. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering 32-bit MCU, CAN controller, and analog sensors in engine bay under wide temperature and load-dump conditions. IC Role / Device Role / Timing Role: Primary 5V LDO with brownout reset, watchdog supervision, and reverse-battery protection. Use Value: 72V input tolerance and 200ms reset hold ensure deterministic restart after cranking dips or alternator spikes. |
Use Scenario: Supplying door module MCU, LIN transceiver, and LED drivers in vehicle interior with low quiescent current demand. IC Role / Device Role / Timing Role: Always-on 5V regulator with HOLD-based wake-on-event and PFI-based battery monitoring. Use Value: 68μA IQ extends battery life during sleep mode; PFI/PFO enables graceful shutdown before deep discharge. |
| Advanced Driver Assistance Systems (ADAS) | Telematics Control Unit (TCU) |
|
Use Scenario: Providing clean 5V rail to radar processor and image sensor in front bumper assembly exposed to thermal cycling. IC Role / Device Role / Timing Role: High-reliability LDO with thermal shutdown, watchdog supervision, and 125°C ambient operation. Use Value: 2.7W thermal dissipation in 5mm × 5mm TQFN sustains full 300mA load at +105°C ambient. |
Use Scenario: Powering cellular modem, GPS receiver, and secure boot MCU in connected vehicle gateway with firmware integrity requirements. IC Role / Device Role / Timing Role: Supervisory regulator with watchdog timer and reset coordination across multiple power domains. Use Value: Windowed watchdog disable (via WD-DIS) allows safe firmware update windows without unintended resets. |
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 5V output but 12.5ms reset timeout (D2) and automotive-grade /V suffix; identical pinout and electrical specs. | Suitable where shorter reset hold time is acceptable (e.g., fast-boot infotainment systems). | Select when system timing budget requires sub-50ms reset assertion; verify µP reset pulse width compatibility. |
| TLV70733PDQNR | Lower voltage range (2.5V–5.5V), 300mA, 25μA IQ, no watchdog or RESET - lacks supervisory features. | Only viable in non-automotive, low-input-voltage applications with external reset IC. | Use only if input stays within 5.5V and external reset/watchdog circuitry is already present. |
Compared with MAX6795TPZD4+, MAX6795TPSD2/V+ offers identical functionality with shorter reset timeout for faster recovery, while TLV70733PDQNR omits all supervisory functions and cannot replace it in automotive safety-critical roles.
Availability
MAX6795TPZD4+ is available at Aetrix Electronics and suitable for automotive engine control, body electronics, and ADAS applications requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for MAX6795TPZD4+ 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 management - delivering ultra-low IQ, high input voltage tolerance, and integrated system supervision in a single AEC-Q100-qualified package.
FAQ
What output voltage does the MAX6795TPZD4+ provide?
The MAX6795TPZD4+ provides a fixed 5.0V output with ±2.5% accuracy over temperature and load. Its ordering code 'Z' specifies the 92.5% reset threshold variant (4.625V), and the 'D4' suffix indicates a 200ms fixed reset timeout period. This output is optimized for powering automotive microcontrollers and peripheral ICs requiring stable, noise-immune 5V rails.
Does the MAX6795TPZD4+ include watchdog functionality?
Yes, the MAX6795TPZD4+ includes a configurable watchdog timer with fixed 280ms timeout (CSWT tied to OUT). It can be disabled using the WD-DIS pin. Unlike windowed variants (MAX6791/MAX6792), the MAX6795TPZD4+ implements a standard timeout watchdog - asserting RESET if WDI fails to toggle within the timeout window. This simplifies firmware integration while maintaining fail-safe behavior.
How is the reset timeout period configured on the MAX6795TPZD4+?
The MAX6795TPZD4+ uses the CSRT pin to configure reset timeout. With ordering code 'D4', CSRT is internally connected to OUT, selecting a fixed 200ms timeout period. No external capacitor is needed. This value is guaranteed over -40°C to +125°C and ensures µP reset assertion remains active long enough for complete initialization after brownout recovery.
Can the MAX6795TPZD4+ be used in reverse-battery protection circuits?
Yes, the MAX6795TPZD4+ integrates a dedicated GATEP output that drives the gate of an external p-channel MOSFET to implement reverse-battery protection. When reverse polarity is applied, GATEP holds the MOSFET off, blocking current flow. This eliminates the power loss and heat generation associated with series Schottky diodes - improving efficiency in always-on automotive modules powered by 12V lead-acid batteries.
What is the purpose of the HOLD pin on the MAX6795TPZD4+?
The HOLD pin on the MAX6795TPZD4+ enables self-holding operation: once ENABLE is asserted and the regulator starts, pulling HOLD low maintains regulation even if ENABLE returns low. Releasing HOLD shuts down the output. This eliminates external latching circuitry in ignition-switched systems - for example, allowing a brief key-turn to initiate sustained power for CAN bus wake-up without continuous microcontroller intervention.
MAX6795TPZD4+ 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:
- 2.313V, 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)
MAX6795TPZD4+ FAQ
1.How can I place an order for MAX6795TPZD4+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6795TPZD4+ 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 MAX6795TPZD4+ reliable?
The price and inventory of MAX6795TPZD4+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6795TPZD4+ is usually 5 days.
3.What payment methods are accepted for MAX6795TPZD4+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6795TPZD4+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6795TPZD4+?
MAX6795TPZD4+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6795TPZD4+ 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 MAX6795TPZD4+?
For technical support, including MAX6795TPZD4+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6795TPZD4+ requirements.
6.How does Aetrix verify that MAX6795TPZD4+ is sourced from the original manufacturer or authorized distributors?
All MAX6795TPZD4+ 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 MAX6795TPZD4+ meets industry standards.
7.What is the process for return or replacement of MAX6795TPZD4+?
All MAX6795TPZD4+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6795TPZD4+, 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 MAX6795TPZD4+ part is unused and in its original packaging.
Return procedure for MAX6795TPZD4+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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