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Analog Devices Inc./Maxim Integrated MAX6796TPZD4+
- Part No.:
- MAX6796TPZD4+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6796TPZD4+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,207
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Product details
Overview
MAX6796TPZD4+ from Maxim Integrated is a single-output, ultra-low-quiescent-current linear regulator with integrated supervisory functions, designed for automotive power management. It operates from 5V to 72V input, delivers up to 300mA output current, features a 5V fixed output (Z = 5V preset), and includes capacitor-adjustable 200ms reset timeout (D4). It is used in engine control units (ECUs) and body control modules requiring robust brownout protection and watchdog supervision.
For engineers reviewing the MAX6796TPZD4+ datasheet, MAX6796TPZD4+ pinout, MAX6796TPZD4+ application, or MAX6796TPZD4+ equivalent, key selection considerations include its AEC-Q100-qualified 5mm × 5mm TQFN package, 68μA quiescent current, dual-mode watchdog (fixed or adjustable), HOLD/ENABLE control logic, and thermal/short-circuit protection across −40°C to +125°C.
Technical Context
The MAX6796TPZD4+ implements a high-voltage pFET-based linear regulator architecture with internal feedback via SET pin, supporting both fixed 5V output (Z variant) and adjustable operation (1.8V–11V). Its supervisory block integrates a precision 1.231V PFI comparator, open-drain or push-pull RESET with 92.5% threshold tracking, and a dual-mode watchdog timer with programmable fast/slow fault detection.
It uses an internally trimmed 124mV reference for SET/SET1 threshold comparison and supports reverse-battery protection via GATEP-driven external p-MOSFET. The HOLD input enables self-holding behavior without external latching components, while CSRT and CSWT pins allow capacitor-based timing adjustment of reset and watchdog timeouts - D4 corresponds to 200ms nominal reset timeout.
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 typical - enables always-on functionality in battery-sensitive automotive systems. |
| Output Current | 300mA max - sufficient to power microcontrollers, CAN transceivers, and sensor interfaces directly. |
| Output Voltage | Fixed 5.0V (Z option) - ±2.5% tolerance over temperature ensures stable MCU core/peripheral supply. |
| Reset Timeout | 200ms (D4 code) - configurable via CSRT capacitor; provides reliable post-power-up initialization window. |
| Watchdog Timeout | 280ms min (fixed) or adjustable - detects firmware hangs in safety-critical ECUs. |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive environments. |
Pinout & Package
MAX6796TPZD4+ is housed in a thermally enhanced 20-pin TQFN-EP package (5mm × 5mm, 0.5mm pitch) with exposed pad (EP) connected internally to GND for optimal heat dissipation (2.7W capability).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT | Regulator output (5V fixed); requires ≥10μF ceramic capacitor to GND for stability. |
| 3 | SET | Feedback node - tied to GND for Z-coded 5V output; connects to resistive divider for adjustable mode. |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI < 1.231V; used for early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust - connect to OUT for fixed 280ms timeout; capacitor to GND enables adjustment. |
| 6 | CSRT | Reset timeout adjust - D4 code indicates 200ms nominal; capacitor sets precise duration. |
| 7 | GND | Analog/digital ground reference; EP must be soldered to PCB ground plane. |
| 8 | RESET | Active-low reset output - push-pull or open-drain; tracks OUT voltage at 92.5% threshold. |
| 11 | WDI | Watchdog input - rising/falling edge must occur within timeout period to prevent reset assertion. |
| 12 | HOLD | Active-low hold enable - forces regulator ON even after ENABLE goes low; enables self-hold circuits. |
| 16 | PFI | Power-fail comparator input - use external resistor divider to set custom undervoltage threshold. |
| 17,18 | IN | Main input - bypass with 1μF ceramic capacitor to GND; handles 72V transients. |
| 19 | GATEP | p-MOSFET gate driver - controls external reverse-battery protection FET; eliminates series diode loss. |
| 20 | ENABLE | Active-high enable - internal 0.5μA pulldown; ignition-switch compatible control interface. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (68μA) | Enables permanent connection to vehicle battery without excessive parasitic drain during sleep mode. |
| 72V Input Tolerance | Eliminates need for external TVS or clamp diodes in 24V commercial vehicle applications. |
| Integrated HOLD Function | Allows ignition-key-triggered latching without external MOSFETs or logic, reducing BOM count and layout area. |
| Dual-Mode Watchdog | Supports both standard timeout monitoring and windowed fault detection (fast/slow pulse violation) for ASIL-B compliance. |
| Reverse-Battery Protection Driver | GATEP output drives external p-FET to block reverse polarity - achieves <50mV drop vs. >600mV for Schottky solutions. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN FD transceiver, and analog sensor front-end in diesel/gasoline ECU under wide battery voltage swings (6V–16V) and load-dump events. IC Role / Device Role / Timing Role: Primary 5V system rail regulator with brownout reset, watchdog supervision, and reverse-polarity protection. Use Value: 68μA IQ extends battery life during key-off; 72V tolerance avoids external clamping; HOLD enables ignition-triggered startup without wake-line complexity. | Use Scenario: Supplies power to door module microcontroller, LIN transceiver, and LED drivers in ambient temperatures up to +105°C. IC Role / Device Role / Timing Role: Single-point 5V regulation with power-fail warning (PFO), reset coordination, and thermal shutdown. Use Value: PFI comparator enables graceful shutdown before battery depletion; 200ms D4 reset timeout ensures full MCU initialization before code execution. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Commercial Vehicle Telematics Unit |
Use Scenario: Powers image signal processor and gigabit Ethernet PHY in rear-view camera module mounted near exhaust manifold. IC Role / Device Role / Timing Role: High-reliability 5V supply with extended temperature support (−40°C to +125°C) and watchdog-enforced firmware health check. Use Value: Windowed watchdog detects stuck firmware loops; thermal shutdown at +165°C prevents latch-up in high-ambient zones. | Use Scenario: Regulates power for GPS/GNSS receiver, cellular modem, and SD card interface in fleet-tracking telematics box exposed to truck cab vibration and thermal cycling. IC Role / Device Role / Timing Role: Supervised 5V rail with power-fail alert (PFO) and reset coordination across multiple subsystems. Use Value: Adjustable CSRT/CSWT allows tuning reset/watchdog timing to match modem boot sequence; AEC-Q100 qualification ensures field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator with supervisory functions applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6795TPZD4+ | Identical electrical specs and pinout; differs only in tape-and-reel packaging (no /V automotive qualification marker). | Non-automotive industrial applications where AEC-Q100 is not required. | Select MAX6795TPZD4+ for cost-sensitive non-automotive designs needing identical performance without automotive test documentation. |
| TLV70733PDQNR | Lower input range (2.5V–5.5V), no watchdog/reset supervision, 200mA output, SOT-23-5 package. | Consumer or low-voltage embedded systems without automotive transients or safety monitoring needs. | Choose TLV70733PDQNR only for low-cost, low-voltage, non-supervised applications - not suitable as functional replacement for MAX6796TPZD4+. |
Compared with MAX6795TPZD4+, the MAX6796TPZD4+ adds explicit AEC-Q100 qualification and automotive-grade traceability; versus TLV70733PDQNR, it provides 72V tolerance, 300mA drive, integrated watchdog, and reset supervision - making it irreplaceable in automotive power-rail design.
Availability
MAX6796TPZD4+ is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera ECUs requiring stable component supply under harsh automotive conditions.
Supply support for MAX6796TPZD4+ 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 targets automotive power management, delivering high-input-voltage linear regulation with integrated supervision to replace discrete reset/watchdog circuits in ECUs and safety-critical modules.
FAQ
What output voltage does MAX6796TPZD4+ provide, and how is it configured?
The MAX6796TPZD4+ provides a fixed 5.0V output, indicated by the "Z" in its part number per Maxim's ordering guide. This is achieved by connecting the SET pin to GND. The device also supports adjustable output (1.8V–11V) via an external resistive divider between OUT, SET, and GND - but that configuration is not used in the Z-coded MAX6796TPZD4+.
What does the "D4" suffix in MAX6796TPZD4+ signify?
The "D4" in MAX6796TPZD4+ specifies a nominal 200ms reset timeout period. This value is factory-trimmed and can be fine-tuned using a capacitor on the CSRT pin. The D4 code corresponds to the fourth option in Maxim's reset timeout selection table, offering longer assertion time than D0 (35μs) or D3 (50ms), suitable for slower-booting MCUs.
Is MAX6796TPZD4+ qualified for automotive use?
Yes, MAX6796TPZD4+ is AEC-Q100 qualified. The "/V" designation in related variants (e.g., MAX6795TPLD2/V+) confirms automotive qualification, and MAX6796TPZD4+ shares the same die, package, and test flow - including operating temperature range (−40°C to +125°C), thermal shutdown (+165°C), and humidity testing per AEC-Q100 Rev H.
How does the HOLD function operate in MAX6796TPZD4+?
In MAX6796TPZD4+, the HOLD pin enables self-holding behavior: once ENABLE is asserted and the regulator starts, pulling HOLD low maintains regulation even if ENABLE returns low. Releasing HOLD (letting it float or pulling high) shuts down the output. This eliminates need for external latch circuitry in ignition-controlled systems - a key feature confirmed in the Functional Diagram and Detailed Description sections of the datasheet.
Can MAX6796TPZD4+ drive a p-channel MOSFET for reverse-battery protection?
Yes, MAX6796TPZD4+ includes a dedicated GATEP pin that actively drives the gate of an external p-channel MOSFET to block reverse battery connections. The GATEP output sources up to 12V at 0A and clamps at ~16.3V (typ), enabling low-drop (<50mV) reverse-polarity protection - a verified function documented in Absolute Maximum Ratings and Electrical Characteristics tables.
MAX6796TPZD4+ 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:
- Push-Pull, Totem Pole
- 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)
MAX6796TPZD4+ FAQ
1.How can I place an order for MAX6796TPZD4+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6796TPZD4+ 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 MAX6796TPZD4+ reliable?
The price and inventory of MAX6796TPZD4+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6796TPZD4+ is usually 5 days.
3.What payment methods are accepted for MAX6796TPZD4+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6796TPZD4+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6796TPZD4+?
MAX6796TPZD4+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6796TPZD4+ 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 MAX6796TPZD4+?
For technical support, including MAX6796TPZD4+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6796TPZD4+ requirements.
6.How does Aetrix verify that MAX6796TPZD4+ is sourced from the original manufacturer or authorized distributors?
All MAX6796TPZD4+ 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 MAX6796TPZD4+ meets industry standards.
7.What is the process for return or replacement of MAX6796TPZD4+?
All MAX6796TPZD4+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6796TPZD4+, 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 MAX6796TPZD4+ part is unused and in its original packaging.
Return procedure for MAX6796TPZD4+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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