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Analog Devices Inc./Maxim Integrated MAX6796TPTD3+
- Part No.:
- MAX6796TPTD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6796TPTD3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,273
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Product details
Overview
The MAX6796TPTD3+ from Maxim Integrated is a single-output, high-voltage 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 68μA quiescent current, and provides a fixed 3.3V output with 87.5% reset threshold and 50ms reset timeout - ideal for engine control units under load-dump conditions.
For engineers reviewing the MAX6796TPTD3+ datasheet, MAX6796TPTD3+ pinout, MAX6796TPTD3+ application, or MAX6796TPTD3+ equivalent, key selection considerations include its AEC-Q100-qualified 20-pin TQFN package, dual-mode watchdog (fixed or capacitor-adjustable), HOLD/ENABLE logic for self-holding ignition circuits, and thermal protection up to +125°C ambient.
Technical Context
The MAX6796TPTD3+ implements a single high-side pFET-based LDO architecture with internal feedback via SET pin, supporting either preset 3.3V output or adjustable 1.8V–11V operation. Its RESET output is push-pull active-low, asserting when OUT drops below 87.5% of nominal (2.888V min) and holding low for 50ms after recovery.
Supervision includes a capacitor-adjustable watchdog timer (CSWT) with fixed 280ms base timeout and a programmable reset timeout (CSRT = D3 → 50ms), plus HOLD input enabling latch-up behavior without external components - all validated across –40°C to +125°C per AEC-Q100 Grade 0 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external clamping. |
| Output Voltage | Fixed 3.3V (±2.5% over temp) - matches common MCU I/O and CAN transceiver rails. |
| Max Output Current | 300mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in body control modules. |
| Quiescent Current | 68μA at no load - enables always-on functionality in vehicle battery-sensitive applications. |
| Dropout Voltage | 420mV typ at 100mA - ensures regulation down to VIN = 3.72V while delivering 3.3V. |
| Reset Threshold | 87.5% of VOUT (2.888V min) - triggers reset before MCU brownout, with 50ms timeout for safe firmware recovery. |
| Operating Temp | –40°C to +125°C - fully specified for under-hood automotive environments. |
Pinout & Package
Package: 20-pin, 5mm × 5mm thermally enhanced TQFN-EP (exposed pad grounded), rated for 2.7W dissipation at +70°C ambient.
| 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 - tied to GND for 3.3V preset; used with external divider for adjustable outputs. |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI < 1.231V, enabling early battery-low warning. |
| 5 | CSWT | Watchdog timeout adjust - connected to OUT for fixed 280ms timeout; capacitor to GND enables adjustment. |
| 6 | CSRT | Reset timeout adjust - connected to OUT for fixed 50ms (D3 code); capacitor enables user-defined delay. |
| 7 | GND | Analog/digital ground reference - must be connected to PCB ground plane via exposed pad. |
| 8 | RESET | Push-pull active-low reset - drives µP reset pin directly; no pull-up required. |
| 11 | WDI | Watchdog input - rising/falling edge must occur within timeout window to prevent reset assertion. |
| 12 | HOLD | Active-low hold enable - forces regulator ON even after ENABLE goes low; latches ignition state. |
| 16 | PFI | Power-fail comparator input - set via resistor divider to monitor battery or pre-regulated rail voltage. |
| 17,18 | IN | Main input - bypassed with 1μF ceramic capacitor to GND; accepts up to +80V transient. |
| 19 | GATEP | pFET gate drive - controls external high-side MOSFET for reverse-battery protection (no diode drop). |
| 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 >10-year battery standby in always-on automotive modules without parasitic drain. |
| 72V Input Tolerance | Eliminates need for external TVS or Zener clamping during ISO 7637-2 pulse 5a load-dump events. |
| Integrated HOLD Function | Permits self-holding ignition circuit using only one GPIO - no external latch or MOSFET required. |
| Capacitor-Adjustable Reset/Watchdog | Allows precise tuning of tRP and tWD to match MCU boot time and firmware watchdog window. |
| Reverse-Battery Protection Drive (GATEP) | Directly drives pFET gate to achieve <50mV forward drop - replaces lossy series diode solutions. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN transceivers, and analog sensors in gasoline/diesel engine compartments exposed to 125°C ambient and load-dump transients. IC Role / Device Role / Timing Role: Primary 3.3V LDO with reset supervision and watchdog - ensures deterministic MCU startup and fault recovery during cranking. Use Value: 72V input range and thermal shutdown prevent failure during jump-starts; 50ms reset holds MCU in reset until stable 3.3V is established. | Use Scenario: Supplies door module microcontroller and LIN transceivers in vehicle interior, requiring low IQ and reliable wake-from-sleep behavior. IC Role / Device Role / Timing Role: Always-on regulator with HOLD-latched ENABLE - maintains power during key-off but releases output on valid wake signal. Use Value: 68μA quiescent current extends battery life; HOLD function eliminates need for external latching circuitry. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Electric Power Steering (EPS) Controller |
Use Scenario: Powers image sensor, ISP, and communication ICs in front-facing ADAS camera mounted near windshield, subject to wide temperature swings. IC Role / Device Role / Timing Role: Single 3.3V supply with watchdog supervision - monitors host processor health and forces safe reboot on software hang. Use Value: Windowed watchdog capability (via WDS0/WDS1) detects both fast and slow MCU stalls; 125°C rating supports sealed housing operation. | Use Scenario: Supplies motor control MCU and gate drivers in EPS rack unit, where reverse-battery events and high ambient heat are common. IC Role / Device Role / Timing Role: High-reliability LDO with integrated reverse-battery protection drive (GATEP) - replaces discrete pFET + driver solution. Use Value: GATEP output drives external p-channel MOSFET with <100ns turn-on, achieving <30mV conduction loss vs. 400mV diode drop. |
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 |
|---|---|---|---|
| MAX6795TPTD3+ | Identical pinout, specs, and features - differs only in tape-and-reel packaging (2.5k vs. standard reel). | No functional difference; same automotive qualification and temperature range. | Select MAX6795TPTD3+ only if volume procurement requires nonstandard reel size. |
| TPS7B8733QKVURQ1 | 3.3V fixed output, 350mA, 35μA IQ, 40V max input - lacks watchdog, HOLD, GATEP, and 72V tolerance. | Suitable for lower-voltage 24V commercial vehicles; not rated for 12V load-dump or reverse-battery. | Choose only for cost-sensitive non-automotive industrial applications where full MAX6796TPTD3+ feature set is unnecessary. |
Compared with MAX6795TPTD3+, the MAX6796TPTD3+ offers identical electrical performance but is optimized for standard tape-and-reel logistics; versus TPS7B8733QKVURQ1, it adds critical automotive safety features - including 72V tolerance, reverse-battery drive, and dual-mode watchdog - at higher BOM cost but essential for OEM compliance.
Availability
MAX6796TPTD3+ is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and electric power steering controllers requiring stable component supply under AEC-Q100 Grade 0 conditions.
Supply support for MAX6796TPTD3+ 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 targets automotive power-supply supervision, integrating high-input-voltage regulation, reset generation, watchdog monitoring, and reverse-battery protection into a single AEC-Q100-qualified device.
FAQ
What output voltage does the MAX6796TPTD3+ provide?
The MAX6796TPTD3+ provides a fixed 3.3V output voltage, factory-trimmed to ±2.5% over –40°C to +125°C. This value is confirmed in the Electrical Characteristics table under "Output Voltage" for T/S option, with typical load regulation of 2% from 1mA to 300mA. The "T" in the part number denotes 3.3V, and "D3" specifies the 50ms reset timeout period.
Does the MAX6796TPTD3+ support adjustable output voltage?
Yes, the MAX6796TPTD3+ supports adjustable output from 1.8V to 11V using an external resistive divider connected between OUT, SET, and GND. However, the TPTD3+ variant is configured for fixed 3.3V operation - the SET pin is internally connected to GND. To use adjustable mode, a different variant (e.g., MAX6796TPAD3+) with "A" suffix must be selected.
What is the purpose of the HOLD pin on the MAX6796TPTD3+?
The HOLD pin on the MAX6796TPTD3+ is an active-low input that enables self-holding behavior: once ENABLE is asserted and the regulator turns on, pulling HOLD low maintains regulation even if ENABLE subsequently goes low. Releasing HOLD shuts down the output. This eliminates external latch circuitry in ignition-switched automotive systems.
How is the reset timeout period set for the MAX6796TPTD3+?
The reset timeout period for the MAX6796TPTD3+ is set to 50ms (D3 code) by connecting the CSRT pin to the OUT pin. This selects the internally fixed 50ms timeout; alternatively, a capacitor from CSRT to GND allows user-adjustable timeout per the formula tRP ≈ 1.22 × CCSRT × VTH, where VTH = 1.218V.
Is the MAX6796TPTD3+ qualified for automotive use?
Yes, the MAX6796TPTD3+ is AEC-Q100 qualified (Grade 0: –40°C to +125°C) and specified for automotive applications. Its 72V input range, reverse-battery protection drive (GATEP), integrated watchdog, and thermal shutdown meet stringent OEM requirements for engine bay and chassis-mounted ECUs.
MAX6796TPTD3+ 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:
- 3.053V, 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)
MAX6796TPTD3+ FAQ
1.How can I place an order for MAX6796TPTD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6796TPTD3+ 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 MAX6796TPTD3+ reliable?
The price and inventory of MAX6796TPTD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6796TPTD3+ is usually 5 days.
3.What payment methods are accepted for MAX6796TPTD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6796TPTD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6796TPTD3+?
MAX6796TPTD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6796TPTD3+ 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 MAX6796TPTD3+?
For technical support, including MAX6796TPTD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6796TPTD3+ requirements.
6.How does Aetrix verify that MAX6796TPTD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6796TPTD3+ 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 MAX6796TPTD3+ meets industry standards.
7.What is the process for return or replacement of MAX6796TPTD3+?
All MAX6796TPTD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6796TPTD3+, 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 MAX6796TPTD3+ part is unused and in its original packaging.
Return procedure for MAX6796TPTD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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