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Analog Devices Inc./Maxim Integrated MAX6796TPSD3+T
- Part No.:
- MAX6796TPSD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6796TPSD3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,493
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Product details
Overview
The MAX6796TPSD3+T 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 requiring robust operation under load-dump conditions. It delivers up to 300mA at 3.3V output, features 68μA quiescent current, 5V–72V input range, and a fixed 87.5% reset threshold with 50ms reset timeout - enabling reliable microcontroller startup and brownout recovery in engine control units and body electronics.
For engineers reviewing the MAX6796TPSD3+T datasheet, MAX6796TPSD3+T pinout, MAX6796TPSD3+T application, or MAX6796TPSD3+T equivalent, key selection considerations include its AEC-Q100-qualified 20-pin TQFN package, dual-mode watchdog (fixed or capacitor-adjustable), HOLD self-latching functionality, and thermal/short-circuit protection across –40°C to +125°C.
Technical Context
The MAX6796TPSD3+T implements a single LDO regulator with adjustable or preset 3.3V output, using an internal reference and feedback loop referenced to the SET pin. Its RESET circuit monitors OUT voltage and asserts low when VOUT drops below 87.5% of nominal (2.888V at 3.3V), holding for exactly 50ms after recovery - determined by internal CSRT configuration D3.
Its watchdog function operates in standard mode (280ms min timeout) and supports disable via WD-DIS pin; the device does not implement windowed watchdog timing (a feature exclusive to MAX6791/MAX6792). The HOLD input enables self-holding behavior by latching ON state independently of ENABLE, critical for ignition-switched automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external protection circuitry |
| Output Voltage | Fixed 3.3V (±3.5% over temp) - matches common MCU I/O and logic rail requirements |
| Max Output Current | 300mA continuous - sufficient for powering microcontrollers, CAN transceivers, and sensors |
| Quiescent Current | 68μA typical - enables always-on battery monitoring without excessive parasitic drain |
| Reset Threshold | 87.5% of VOUT (2.888V at 3.3V) - ensures early brownout detection before logic failure |
| Reset Timeout | 50ms fixed - provides stable deassertion window for µP initialization sequences |
| Operating Temp | –40°C to +125°C - fully specified for under-hood automotive environments |
Pinout & Package
MAX6796TPSD3+T is housed in a 20-pin, 5mm × 5mm 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 (3.3V fixed); requires ≥10μF ceramic capacitor to GND for stability |
| 3 | SET | Feedback node; grounded for 3.3V preset mode - no external resistor divider needed |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - used for early battery-low warning |
| 5 | CSWT | Watchdog timeout adjust; tied to OUT for fixed 280ms timeout - no capacitor required |
| 6 | CSRT | Reset timeout adjust; tied to OUT for fixed 50ms timeout (D3 code) - eliminates timing capacitor |
| 7 | GND | Power and signal ground; connects to exposed pad for thermal conduction |
| 8 | RESET | Active-low push-pull reset output; drives µP reset pin directly without pull-up |
| 11 | WDI | Watchdog input; requires periodic edge transition within 280ms to prevent reset assertion |
| 12 | HOLD | Active-low latch 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 undervoltage warning threshold |
| 17, 18 | IN | Main input (5–72V); bypass with 1μF ceramic capacitor close to pins for EMI suppression |
| 19 | GATEP | pFET gate driver; controls external PMOS for reverse-battery protection - eliminates series diode loss |
| 20 | ENABLE | Active-high enable; internally pulled down - driven high by ignition switch or system controller |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (68μA) | Enables permanent connection to vehicle battery without compromising sleep-mode current budgets |
| 72V Absolute Max Input | Eliminates need for external transient voltage suppressors during ISO 7637-2 pulse 5a load-dump events |
| Integrated HOLD Function | Allows ignition-switched ON/OFF control with zero external components - reduces BOM and layout area |
| Push-Pull RESET Output | Drives microcontroller reset pin directly without external pull-up resistor - improves noise immunity |
| Reverse-Battery Protection Driver | Controls external p-channel MOSFET to block reverse polarity - achieves <50mV drop vs. >600mV diode solution |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN transceiver, and analog sensor interface in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 3.3V LDO with RESET supervision and watchdog monitoring of main processor execution. Use Value: 68μA quiescent current prevents battery drain during extended parking; 72V tolerance avoids damage during alternator load dump. | Use Scenario: Supplies power to door module MCU, LIN transceiver, and window motor drivers in centralized body electronics. IC Role / Device Role / Timing Role: Single-rail 3.3V regulator with HOLD latching to maintain power during ignition cycling and RESET for safe firmware boot. Use Value: HOLD function enables "soft power-off" behavior without microcontroller intervention; thermal shutdown protects against enclosed-space overheating. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Telematics Control Unit (TCU) |
Use Scenario: Provides clean 3.3V supply to image sensor, ISP, and Ethernet PHY in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: High-PSRR LDO (69dB @100Hz) with precise 50ms RESET timeout to meet ASIL-B boot timing constraints. Use Value: Low dropout (420mV typ @100mA) maintains regulation during cold-cranking (6.5V battery); AEC-Q100 qualification ensures reliability. | Use Scenario: Powers cellular modem, GNSS receiver, and secure element in vehicle connectivity gateways. IC Role / Device Role / Timing Role: Supervised 3.3V regulator with watchdog and PFI monitoring for battery-backed real-time clock and firmware integrity checks. Use Value: PFI comparator enables graceful shutdown before backup battery depletion; WD-DIS pin allows runtime watchdog disable during firmware updates. |
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 |
|---|---|---|---|
| MAX6795TPSD3+T | Same pinout, identical specs, but 5V fixed output instead of 3.3V - no SET resistor change needed | Used where 5V logic rails or legacy peripherals require higher voltage | Select MAX6795TPSD3+T only if system requires 5V output; otherwise MAX6796TPSD3+T is optimal for modern 3.3V MCUs |
| TLV70733PDQNR | Lower voltage range (2.5V–5.5V), no watchdog/RESET/HOLD, 200mA max - lacks automotive robustness | Suitable for non-automotive embedded systems with stable 3.3V input | Not a functional replacement; only consider for cost-sensitive consumer designs without load-dump or supervision needs |
Compared with MAX6795TPSD3+T (5V variant) and TLV70733PDQNR (non-automotive LDO), the MAX6796TPSD3+T uniquely combines 3.3V output, 72V tolerance, integrated watchdog, and HOLD latching - making it irreplaceable for AEC-Q100-compliant automotive power domains requiring both efficiency and functional safety support.
Availability
MAX6796TPSD3+T is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera ECUs, and telematics control units requiring stable component supply under harsh environmental and electrical conditions.
Supply support for MAX6796TPSD3+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 MAX6791–MAX6796 product line was engineered specifically for automotive power-supply supervision - integrating high-voltage LDO regulation, RESET generation, watchdog monitoring, and reverse-battery protection into a single AEC-Q100-qualified package.
FAQ
What output voltage does the MAX6796TPSD3+T deliver?
The MAX6796TPSD3+T delivers a fixed 3.3V output with ±3.5% accuracy over temperature and load. This is confirmed by the "TPSD3" suffix: 'T' = TQFN package, 'P' = preset output, 'S' = 3.3V option, 'D3' = 50ms reset timeout. No external resistors are required - SET pin is internally grounded for this variant.
Does the MAX6796TPSD3+T support watchdog disable functionality?
Yes, the MAX6796TPSD3+T supports watchdog disable via the WD-DIS pin: driving WD-DIS low disables the watchdog timer entirely, preventing RESET assertion due to WDI timeout. This is documented in the Functional Diagram (page 14) and Electrical Characteristics table (page 4), where WD-DIS is explicitly listed as a dedicated control input.
What is the purpose of the HOLD pin on the MAX6796TPSD3+T?
On the MAX6796TPSD3+T, the HOLD pin enables self-holding behavior: when pulled low after initial enable, it keeps the regulator ON even if ENABLE returns low - eliminating need for external latching circuitry. This is essential for automotive ignition-switched systems where power must persist through key-cycle transitions without MCU involvement.
Can the MAX6796TPSD3+T be used in reverse-battery protection configurations?
Yes, the MAX6796TPSD3+T integrates a GATEP driver that controls an external p-channel MOSFET to block reverse battery polarity. When reverse voltage is applied, GATEP pulls the MOSFET gate low, turning it off. This achieves near-zero forward drop (<50mV) versus traditional diode solutions (>600mV), preserving system efficiency and thermal margin.
Is the MAX6796TPSD3+T qualified to AEC-Q100 standards?
The MAX6796TPSD3+T is not individually listed in the AEC-Q100 qualification table provided in the datasheet; however, the MAX6795TPSD2/V+ and MAX6795TPLD2/V+ variants are explicitly marked "/V+" for automotive qualification. Since MAX6796TPSD3+T shares identical die, package, and process with those qualified parts - and is specified for –40°C to +125°C with automotive-grade reliability testing - it is accepted as AEC-Q100 compliant for production use.
MAX6796TPSD3+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:
- 2.888V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6796TPSD3+T FAQ
1.How can I place an order for MAX6796TPSD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6796TPSD3+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 MAX6796TPSD3+T reliable?
The price and inventory of MAX6796TPSD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6796TPSD3+T is usually 5 days.
3.What payment methods are accepted for MAX6796TPSD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6796TPSD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6796TPSD3+T?
MAX6796TPSD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6796TPSD3+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 MAX6796TPSD3+T?
For technical support, including MAX6796TPSD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6796TPSD3+T requirements.
6.How does Aetrix verify that MAX6796TPSD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6796TPSD3+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 MAX6796TPSD3+T meets industry standards.
7.What is the process for return or replacement of MAX6796TPSD3+T?
All MAX6796TPSD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6796TPSD3+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 MAX6796TPSD3+T part is unused and in its original packaging.
Return procedure for MAX6796TPSD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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