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Analog Devices Inc./Maxim Integrated MAX6795TPZD1+T
- Part No.:
- MAX6795TPZD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6795TPZD1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6795TPZD1+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 - enabling robust power management in engine control units and body electronics.
For engineers reviewing the MAX6795TPZD1+T datasheet, MAX6795TPZD1+T pinout, MAX6795TPZD1+T application, or MAX6795TPZD1+T equivalent, key selection considerations include its AEC-Q100-qualified operation over –40°C to +125°C, 20-pin TQFN package with exposed pad, reset threshold accuracy (±2.5% at 5V), capacitor-adjustable reset/watchdog timeout, and integrated reverse-battery protection via GATEP drive.
Technical Context
The MAX6795TPZD1+T implements a single LDO regulator with internal pFET pass element and precision bandgap reference, supporting ultra-low quiescent current across its full 5V–72V input range. Its supervisory block integrates a windowed watchdog timer (only on MAX6791/MAX6792), but MAX6795TPZD1+T uses standard watchdog logic with fixed 280ms min timeout or capacitor-adjustable period via CSWT.
It features dual enable logic: ENABLE controls regulator startup, while HOLD provides self-holding latching behavior - once enabled, pulling HOLD low sustains regulation even after ENABLE returns low. The RESET output is push-pull or open-drain configurable (determined by part suffix; ZD1 indicates push-pull), asserting low when OUT drops below 92.5%/87.5% of nominal voltage and holding for user-selectable timeout (35μs to 200ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external clamping. |
| Output Current | Up to 300mA - sufficient to power microcontrollers, CAN transceivers, and sensor interfaces directly. |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-coupled automotive modules with minimal parasitic drain. |
| Dropout Voltage | 420mV typ at 100mA - ensures stable regulation even during cold-crank (6V battery) conditions. |
| Reset Threshold Accuracy | ±2.5% at 5V output - guarantees deterministic microcontroller reset timing under varying temperature and load. |
| Operating Temperature | –40°C to +125°C - fully specified for under-hood automotive environments per AEC-Q100 Grade 0. |
| Package | 20-pin TQFN (5mm × 5mm, EP) - thermally enhanced for 2.7W dissipation in compact PCB layouts. |
Pinout & Package
MAX6795TPZD1+T is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN package with exposed pad (EP), rated for continuous operation up to +125°C ambient and capable of dissipating 2.7W. The EP must be soldered to a PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT | Regulator output (fixed or adjustable); requires ≥10μF ceramic capacitor to GND for stability. |
| 3 | SET | Feedback input; connect to GND for preset voltage or external resistor divider for 1.8V–11V adjustment. |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI falls below 1.231V threshold (35μs delay). |
| 5 | CSWT | Watchdog timeout adjust; connect to OUT for fixed 280ms timeout or capacitor to GND for adjustable period. |
| 6 | CSRT | Reset timeout adjust; connect to OUT for fixed timeout (e.g., D1 = 3.125ms) or capacitor for user-defined duration. |
| 7 | GND | Analog/digital ground reference; connects internally to exposed pad (EP). |
| 8 | RESET | Active-low push-pull reset output; asserts when OUT drops below threshold and holds for tRP. |
| 11 | WDI | Watchdog input; requires edge transition within timeout period to prevent RESET assertion. |
| 12 | HOLD | Active-low latching control; forces regulator ON even after ENABLE goes low - enables self-hold circuits. |
| 16 | PFI | Power-fail comparator input; use resistive divider to set custom brownout detection threshold. |
| 17,18 | IN | Main regulator input; bypass with ≥1μF ceramic capacitor to GND near pins. |
| 19 | GATEP | pFET gate driver; drives external p-channel MOSFET for reverse-battery protection (no diode drop). |
| 20 | ENABLE | Active-high enable; internally pulled down (0.5μA sink); initiates startup sequence when driven high. |
| EP | Exposed Pad | Internally connected to GND; must be soldered to PCB ground plane for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 68μA enables >10-year battery life in always-on automotive modules (e.g., telematics, alarm systems). |
| Integrated reverse-battery protection | GATEP pin drives external pFET - eliminates series diode, reducing voltage drop and heat generation. |
| Self-holding circuit support | HOLD input latches regulator ON after ENABLE release - removes need for external latch IC or discrete logic. |
| Capacitor-adjustable supervision timers | CSRT and CSWT pins allow precise tuning of reset and watchdog timeouts without firmware changes. |
| AEC-Q100 qualified | Qualified to Grade 0 (–40°C to +125°C) - meets automotive reliability and stress-test requirements. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powering MCU, CAN transceiver, and analog front-end in gasoline/diesel engine control modules exposed to wide voltage transients and high ambient temperatures. IC Role / Device Role / Timing Role: Primary 5V/3.3V LDO with RESET supervision and watchdog monitoring - ensures deterministic boot and fault recovery during cranking or load dump. Use Value: 72V input tolerance and 68μA IQ eliminate need for pre-regulator stages; HOLD function enables ignition-key-triggered latching without external components. | Use Scenario: Supplying vision processor, radar SoC, and sensor fusion MCU in forward collision warning or lane departure systems. IC Role / Device Role / Timing Role: Single-point power supervisor and regulator - monitors supply health, asserts RESET on brownout, and triggers watchdog timeout if software hangs. Use Value: Adjustable 1.8V–11V output supports diverse core I/O voltages; PFI/PFO interface enables early battery degradation warning before system shutdown. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Regulating power for door module microcontrollers, LIN transceivers, and LED drivers in centralized body electronics architecture. IC Role / Device Role / Timing Role: Always-on LDO with programmable reset timeout - maintains real-time clock and wake-up logic while minimizing battery drain. Use Value: 300mA output drives multiple peripherals; thermal shutdown (165°C) and short-circuit protection ensure field reliability in sealed enclosures. | Use Scenario: Providing clean, supervised 3.3V rail for application processor, audio codec, and display interface in automotive infotainment systems. IC Role / Device Role / Timing Role: Secondary regulated supply with power-fail detection - coordinates graceful OS shutdown when vehicle battery voltage drops. Use Value: PFI threshold (1.231V ±0.5%) enables accurate battery monitoring; push-pull RESET drives processor reset pin directly without pull-up resistor. |
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 regulator core, but preset 3.3V output and 12.5ms fixed reset timeout (D2); AEC-Q100 qualified (/V+). | Eliminates external SET resistor network; suited for designs requiring known, factory-trimmed reset timing. | Select when fixed 3.3V output and guaranteed 12.5ms reset hold time simplify qualification testing. |
| TLV70733PDQNR | Lower input range (2.5V–5.5V), no watchdog or HOLD, 200mA output, SOT-23-5 package. | Lacks automotive-grade supervision features; suitable only for non-automotive, low-voltage, space-constrained applications. | Not recommended for automotive use; consider only for cost-sensitive consumer-grade 3.3V point-of-load regulation. |
Compared with MAX6795TPZD1+T, MAX6795TPSD2/V+ offers identical supervision architecture with factory-set output and reset timing - reducing BOM count and validation effort - while TLV70733PDQNR lacks high-voltage capability, watchdog, and HOLD, making it unsuitable for automotive power sequencing.
Availability
MAX6795TPZD1+T is available at Aetrix Electronics and suitable for automotive engine control units, ADAS domain controllers, and body electronics requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6795TPZD1+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 MAX6795TPZD1+T belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators, engineered specifically for automotive subsystems needing reliable power sequencing, fault monitoring, and battery-resilient operation.
FAQ
What output voltage options does the MAX6795TPZD1+T support?
The MAX6795TPZD1+T supports factory-preset output voltages of 5.0V, 3.3V, 2.5V, or 1.8V - determined by the third character in the part number (Z = 3.3V). It also supports adjustable output from 1.8V to 11V using an external resistor divider connected between OUT, SET, and GND. The ZD1 suffix confirms 3.3V fixed output with push-pull RESET.
Does the MAX6795TPZD1+T include reverse-battery protection?
Yes, the MAX6795TPZD1+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 IN-to-GATEP clamp voltage is 13.8V–18.8V, ensuring safe MOSFET gate control across the full 5V–72V input range.
How is the reset timeout period configured on the MAX6795TPZD1+T?
The reset timeout period on the MAX6795TPZD1+T is configured using the CSRT pin. Connecting CSRT to OUT selects one of five factory-fixed durations (35μs, 3.125ms, 12.5ms, 50ms, or 200ms), with ZD1 indicating 3.125ms (D1). For custom timing, connect a capacitor from CSRT to GND - timeout scales linearly with capacitance (e.g., 15nF ≈ 12.5ms).
Is the MAX6795TPZD1+T AEC-Q100 qualified?
No - the MAX6795TPZD1+T is not AEC-Q100 qualified. Its /V+ variants (e.g., MAX6795TPSD2/V+) are AEC-Q100 Grade 0 qualified. MAX6795TPZD1+T is specified for –40°C to +125°C operation and built on automotive-grade process technology, but formal AEC-Q100 test documentation is not provided for this specific tape-and-reel variant.
What is the function of the HOLD pin on the MAX6795TPZD1+T?
The HOLD pin on the MAX6795TPZD1+T is an active-low latching control that sustains regulator output even after ENABLE is deasserted. Once the regulator is enabled, pulling HOLD low "locks" the output ON. Releasing HOLD (to high or open) shuts down the output. This enables self-holding circuits - such as ignition-triggered power rails - without external latches or microcontroller intervention.
MAX6795TPZD1+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:
- 2.313V, 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)
MAX6795TPZD1+T FAQ
1.How can I place an order for MAX6795TPZD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6795TPZD1+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 MAX6795TPZD1+T reliable?
The price and inventory of MAX6795TPZD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6795TPZD1+T is usually 5 days.
3.What payment methods are accepted for MAX6795TPZD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6795TPZD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6795TPZD1+T?
MAX6795TPZD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6795TPZD1+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 MAX6795TPZD1+T?
For technical support, including MAX6795TPZD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6795TPZD1+T requirements.
6.How does Aetrix verify that MAX6795TPZD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6795TPZD1+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 MAX6795TPZD1+T meets industry standards.
7.What is the process for return or replacement of MAX6795TPZD1+T?
All MAX6795TPZD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6795TPZD1+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 MAX6795TPZD1+T part is unused and in its original packaging.
Return procedure for MAX6795TPZD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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