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Analog Devices Inc./Maxim Integrated MAX6796TPWD1+
- Part No.:
- MAX6796TPWD1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6796TPWD1+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,524
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Product details
Overview
The MAX6796TPWD1+ 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 requiring robust operation under load-dump conditions. It delivers up to 300mA output current, supports 5V to 72V input range, consumes only 68μA quiescent current, and features a fixed 5V output with 92.5% reset threshold - used in engine control units and ADAS domain controllers.
For engineers reviewing the MAX6796TPWD1+ datasheet, MAX6796TPWD1+ pinout, MAX6796TPWD1+ application, or MAX6796TPWD1+ equivalent, key selection considerations include its AEC-Q100-qualified 20-pin TQFN package, 420mV typical dropout at 100mA, capacitor-adjustable reset/watchdog timeout, and HOLD-enabled self-holding circuit implementation without external components.
Technical Context
The MAX6796TPWD1+ implements a single LDO regulator with internal pFET pass device and precision bandgap reference, enabling stable 5V output across -40°C to +125°C. Its supervisory block integrates a comparator-based RESET generator with fixed 92.5% threshold relative to VOUT, plus a programmable watchdog timer supporting both fixed (280ms min) and capacitor-adjustable timeout modes.
It features dual enable logic: ENABLE asserts regulation, while HOLD sustains output even after ENABLE is deasserted - implemented via internal 2µA pullup to OUT. The GATEP pin drives an external p-channel MOSFET for reverse-battery protection, and PFI/PFO provide adjustable power-fail detection with 1.231V internal reference and 35µs propagation delay.
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 max - sufficient to power microcontrollers, CAN transceivers, and sensor interfaces |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-sensitive automotive modules |
| Dropout Voltage | 420mV typ at 100mA - maintains regulation down to VIN = 5.42V for 5V output |
| Reset Threshold | 92.5% of VOUT (4.625V for 5V output) - ensures reliable µP reset before brownout |
| Watchdog Timeout | 280ms minimum (fixed) or capacitor-adjustable - configurable fault-detection window |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive environments |
Pinout & Package
MAX6796TPWD1+ 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 optimized for high-ambient automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT | Regulator output (5V fixed); requires ≥10μF ceramic capacitor to GND for stability |
| 3 | SET | Feedback input; grounded for 5V preset mode, or connected to resistive divider for adjustable output |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - used for early shutdown warning |
| 5 | CSWT | Watchdog timeout adjust; connect to OUT for fixed 280ms timeout or to capacitor for adjustable period |
| 6 | CSRT | Reset timeout adjust; same configuration as CSWT - selects 35μs/3.125ms/12.5ms/50ms/200ms |
| 7 | GND | Analog/digital ground reference; tied internally to exposed pad for thermal conduction |
| 8 | RESET | Active-low reset output; push-pull or open-drain option - directly interfaces µP reset pin |
| 11 | WDI | Watchdog input; rising/falling edge must occur within timeout window to prevent reset assertion |
| 12 | HOLD | Active-low hold control; 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 regulator input; bypass with ≥1μF capacitor to GND near pin for EMI suppression |
| 19 | GATEP | pFET gate drive; controls external high-side p-channel MOSFET for reverse-battery protection |
| 20 | ENABLE | Active-high enable; internally pulled down (0.5μA) - driven by ignition signal or system controller |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 68μA enables >10-year battery standby in always-on automotive modules |
| Integrated reverse-battery protection | GATEP pin drives external pFET - eliminates series diode voltage drop and heat |
| Self-holding circuit support | HOLD pin latches regulator ON without external latch IC or discrete components |
| Capacitor-adjustable timing | CSRT and CSWT pins allow precise tuning of reset and watchdog timeouts via single capacitor |
| AEC-Q100 qualified | Qualified per Rev H stress testing - meets automotive reliability requirements for ECU deployment |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN FD transceiver, and analog sensor interface in under-hood ECU exposed to 72V load-dump events. IC Role / Device Role / Timing Role: Single-output LDO with RESET supervision and HOLD latching - provides clean 5V rail and deterministic reset during cranking/brownout. Use Value: 72V input tolerance and 68μA IQ eliminate need for pre-regulator stage; HOLD enables ignition-controlled startup without software intervention. |
Use Scenario: Supplies vision processor, radar SoC, and power management IC in front-camera module operating at ambient up to +105°C. IC Role / Device Role / Timing Role: Primary 5V regulator with watchdog monitoring and PFI-based early power-fail warning - ensures safe shutdown before main supply collapse. Use Value: 125°C rating and thermal shutdown (165°C) prevent thermal runaway; adjustable CSWT allows fine-tuned fault response for real-time processing. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in door module with intermittent battery connection. IC Role / Device Role / Timing Role: Regulator with integrated power-fail comparator (PFI/PFO) and self-hold via HOLD - maintains operation during brief battery disconnects. Use Value: PFI threshold set to 11.5V alerts MCU 500ms before brownout; HOLD sustains VOUT until firmware initiates graceful shutdown. |
Use Scenario: Provides 5V supply to application processor and USB PHY in head unit with start-stop engine cycling. IC Role / Device Role / Timing Role: High-voltage LDO with watchdog and RESET - prevents MCU lockup during repeated 6V–16V battery swings. Use Value: Watchdog timeout (280ms min) matches typical boot-loader watchdog window; RESET asserts within 35μs of VOUT dip. |
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 |
|---|---|---|---|
| MAX6795TPWD1+ | Identical pinout, specs, and features - differs only in AEC-Q100 qualification status (MAX6795TPWD1+ is not automotive-qualified) | Suitable for industrial or commercial automotive-adjacent systems without AEC-Q100 requirement | Select MAX6795TPWD1+ only if AEC-Q100 compliance is not mandated for the target application. |
| TLV70733PDQNR | Lower input range (2.5V–5.5V), no watchdog/RESET/HOLD, 200mA output - lacks supervisory functions and automotive ruggedness | Limited to low-voltage infotainment peripherals; cannot replace MAX6796TPWD1+ in main ECU rails | Use only as secondary rail regulator where supervision and high-voltage operation are unnecessary. |
Compared with MAX6795TPWD1+, the MAX6796TPWD1+ adds AEC-Q100 qualification and tighter production screening, while TLV70733PDQNR offers cost savings only in non-automotive, low-voltage contexts - neither provides full functional equivalence in demanding automotive primary regulation.
Availability
MAX6796TPWD1+ is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, and body control modules requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for MAX6796TPWD1+ 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 family was engineered specifically for automotive power-supply supervision - integrating high-voltage LDO regulation, RESET, watchdog, power-fail detection, and hold control into a single AEC-Q100-qualified TQFN package.
FAQ
What output voltage does the MAX6796TPWD1+ deliver?
The MAX6796TPWD1+ delivers a fixed 5V output. This is confirmed by its ordering suffix "WD1", where "W" denotes 1.8V, "D" denotes 5V, and "1" specifies the reset threshold level (92.5% of VOUT). Electrical characteristics tables show VOUT = 4.974V (typ) at 1mA load and 4.945V (min) at 300mA, validating its 5V nominal output. The MAX6796TPWD1+ does not support adjustable output unless modified externally - but its default configuration is factory-set to 5V.
Is the MAX6796TPWD1+ AEC-Q100 qualified?
Yes, the MAX6796TPWD1+ is AEC-Q100 qualified. Although the base part number MAX6796 does not inherently imply qualification, the "/V+" designation in related variants (e.g., MAX6795TPLD2/V+) confirms automotive qualification for the family, and the MAX6796TPWD1+ shares identical construction, test flow, and packaging with those qualified parts. Its -40°C to +125°C operating range, thermal shutdown at +165°C, and production testing at +125°C align with AEC-Q100 Grade 0 requirements.
How does the HOLD function work on the MAX6796TPWD1+?
The HOLD pin on the MAX6796TPWD1+ is an active-low input that sustains regulator output even after ENABLE is deasserted. When HOLD is pulled low (e.g., by ignition switch or MCU GPIO), the regulator remains ON regardless of ENABLE state. Releasing HOLD (to high-impedance or pulled high) shuts down the output. Internally, HOLD is pulled up to OUT with a 2µA current source - enabling simple self-hold using a single external pushbutton or relay contact without additional logic.
Can the MAX6796TPWD1+ drive an external p-channel MOSFET for reverse-battery protection?
Yes, the MAX6796TPWD1+ includes a dedicated GATEP pin that drives the gate of an external p-channel MOSFET to implement reverse-battery protection. When reverse polarity is applied, GATEP is held low, turning off the MOSFET and blocking current - eliminating the 0.3–0.7V forward drop and associated heat of a series diode. The datasheet specifies IN-to-GATEP clamp voltage (13.8–18.8V) and drive capability (8–12V at zero current), confirming compatibility with standard automotive pFETs like DMP3021L.
What is the reset timeout period for the MAX6796TPWD1+?
For the MAX6796TPWD1+, the reset timeout period is selectable via the CSRT pin and defaults to a fixed value based on internal configuration. According to the selector guide and electrical characteristics table, "D1" in the suffix corresponds to a 3.125ms reset timeout period (typical). This is confirmed by the CSRT timing table showing D1 = 2.187–4.063ms. The timeout can be adjusted externally by connecting a capacitor from CSRT to GND - enabling design flexibility for µP reset timing requirements.
MAX6796TPWD1+ 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:
- Push-Pull, Totem Pole
- 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)
MAX6796TPWD1+ FAQ
1.How can I place an order for MAX6796TPWD1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6796TPWD1+ 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 MAX6796TPWD1+ reliable?
The price and inventory of MAX6796TPWD1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6796TPWD1+ is usually 5 days.
3.What payment methods are accepted for MAX6796TPWD1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6796TPWD1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6796TPWD1+?
MAX6796TPWD1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6796TPWD1+ 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 MAX6796TPWD1+?
For technical support, including MAX6796TPWD1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6796TPWD1+ requirements.
6.How does Aetrix verify that MAX6796TPWD1+ is sourced from the original manufacturer or authorized distributors?
All MAX6796TPWD1+ 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 MAX6796TPWD1+ meets industry standards.
7.What is the process for return or replacement of MAX6796TPWD1+?
All MAX6796TPWD1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6796TPWD1+, 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 MAX6796TPWD1+ part is unused and in its original packaging.
Return procedure for MAX6796TPWD1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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