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Analog Devices Inc./Maxim Integrated MAX6796TPWD2+
- Part No.:
- MAX6796TPWD2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6796TPWD2+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,997
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Product details
Overview
The MAX6796TPWD2+ 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 87.5% reset threshold - used in engine control units and ADAS domain controllers.
For engineers reviewing the MAX6796TPWD2+ datasheet, MAX6796TPWD2+ pinout, MAX6796TPWD2+ application, or MAX6796TPWD2+ equivalent, key selection criteria include its AEC-Q100-qualified 5mm × 5mm TQFN package, 420mV typical dropout at 100mA, capacitor-adjustable reset timeout (D2 = 12.5ms), and dual-mode watchdog disable capability via WD-DIS pin.
Technical Context
The MAX6796TPWD2+ implements a single LDO regulator with internal pFET pass element 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 87.5% threshold relative to VOUT, and a programmable watchdog timer with fixed 280ms timeout (CSWT tied to OUT) and fast/slow fault detection disabled - confirmed by WD-DIS pin functionality and absence of WDS0/WDS1 pins.
It includes dedicated HOLD input for self-holding latch behavior without external components, GATEP pin for reverse-battery protection using external p-channel MOSFET, and PFI/PFO for adjustable power-fail monitoring with 1.231V internal reference. All protections - thermal shutdown (+165°C), short-circuit current limit (480mA), and output overvoltage clamp (1.05×VOUT) - are fully specified over automotive temperature range.
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 5.0V (±2.5% over temp) - preset option per ordering code 'D' in MAX6796TPWD2+. |
| Max Output Current | 300mA continuous - sufficient for MCU core rails and CAN transceivers in body electronics. |
| Quiescent Current | 68μA typical - enables always-on functionality in low-power vehicle modules. |
| Dropout Voltage | 420mV typ at 100mA - ensures regulation down to VIN = 5.42V for 5V output. |
| Reset Threshold | 87.5% of VOUT (4.375V nominal) - triggers RESET when regulated output drops below safe logic level. |
| Reset Timeout | 12.5ms (D2 option) - provides sufficient deassertion window for microcontroller initialization sequences. |
Pinout & Package
MAX6796TPWD2+ uses a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND for optimal thermal dissipation (2.7W max). Pin count and layout match the MAX6791–MAX6796 family; pin functions are validated per Maxim's official pin description table for MAX6795/MAX6796 variants.
| 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; tied to GND for fixed 5V mode - no external 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; connected to OUT for fixed 280ms timeout (per D2 suffix). |
| 6 | CSRT | Reset timeout adjust; connected to OUT for fixed 12.5ms timeout (D2 option). |
| 7 | GND | Analog/digital ground reference; EP must be soldered to PCB ground plane. |
| 8 | RESET | Active-low push-pull reset output; drives µP reset pin directly without pull-up. |
| 11 | WDI | Watchdog input; toggled by MCU to prevent spurious resets - monitored continuously. |
| 12 | HOLD | Active-low hold enable; latches regulator ON after initial ENABLE assertion - enables ignition-key hold circuits. |
| 16 | PFI | Power-fail comparator input; set via resistor divider to monitor battery or pre-regulated rail. |
| 17,18 | IN | Main regulator input; bypassed with 1μF ceramic capacitor to GND near pins. |
| 19 | GATEP | pFET gate drive; controls external p-channel MOSFET for reverse-battery protection. |
| 20 | ENABLE | Active-high enable; pulled down internally (0.5μA sink) - driven high by ignition signal. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 68μA enables >10-year battery standby life in always-on automotive modules. |
| Integrated reverse-battery protection | GATEP pin drives external pFET - eliminates series diode drop and heat loss. |
| Self-holding circuit support | HOLD pin allows ignition-switch-initiated latching without external logic or capacitors. |
| Capacitor-adjustable timing | CSRT and CSWT pins accept external capacitors for precise reset/watchdog timeout tuning. |
| 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: Powers 32-bit ARM-based microcontroller and CAN FD transceiver in gasoline/diesel ECU under cold-crank (5.5V) and load-dump (72V) conditions. IC Role / Device Role / Timing Role: Primary 5V LDO regulator with RESET supervision and watchdog monitoring of main CPU firmware execution. Use Value: 68μA IQ prevents battery drain during vehicle sleep; 72V input tolerance avoids external TVS clamping; HOLD enables ignition-triggered power sequencing. | Use Scenario: Supplies vision processor and radar sensor interface in front-camera module operating in ambient temperatures up to +105°C. IC Role / Device Role / Timing Role: Single-point 5V power source with brownout detection (RESET) and power-fail warning (PFO) for graceful shutdown before voltage collapse. Use Value: 12.5ms reset timeout ensures full processor boot before release; thermal shutdown (+165°C) protects against under-hood overheating. |
| Body Control Module (BCM) | Infotainment Power Management |
Use Scenario: Regulates power for LIN gateway, door module MCU, and LED drivers in centralized BCM architecture. IC Role / Device Role / Timing Role: High-efficiency 5V supply with ENABLE-controlled startup and PFI-monitored battery health reporting. Use Value: 300mA output supports multiple peripherals; PFI threshold set to 11.5V warns of weak battery before cranking failure. | Use Scenario: Provides clean 5V rail to USB-C PD controller and audio codec in head-unit design with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise LDO with 69dB PSRR at 100Hz - suppresses switching noise from adjacent DC/DC converters. Use Value: 420mV dropout allows operation down to 5.42V input - maintains function during alternator ripple dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6795TPSD2/V+ | Same pinout, same 5V fixed output, but AEC-Q100 qualified (V+ suffix) and specified for automotive grade. | Required for production automotive programs needing formal qualification evidence. | Select MAX6795TPSD2/V+ when AEC-Q100 documentation and traceability are mandatory. |
| TLV70733PDQNR | Lower input range (2.5V–5.5V), no watchdog or RESET, 200mA output, SOT-23-5 package. | Limited to post-regulated 3.3V domains; lacks supervisory features and high-voltage resilience. | Use TLV70733PDQNR only in non-automotive, low-voltage auxiliary rails where cost and size outweigh feature needs. |
Compared with MAX6795TPSD2/V+, the MAX6796TPWD2+ offers identical regulation and supervision but lacks formal AEC-Q100 certification; compared with TLV70733PDQNR, it provides 14× higher input voltage range, integrated RESET/watchdog, and 1.5× output current - making it irreplaceable in primary automotive power domains.
Availability
MAX6796TPWD2+ is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and body control modules requiring stable component supply across extended temperature and high-reliability automotive environments.
Supply support for MAX6796TPWD2+ 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-supply supervision, delivering high-input-voltage LDOs with integrated RESET, watchdog, power-fail detection, and reverse-battery protection in compact thermally enhanced packages.
FAQ
What is the output voltage configuration of the MAX6796TPWD2+?
The MAX6796TPWD2+ is configured for fixed 5.0V output, as indicated by the 'D' in the ordering code. The SET pin is internally connected to GND, eliminating need for external feedback resistors. Output accuracy is ±2.5% over -40°C to +125°C, with line regulation of 1% and load regulation of 2% across 1mA–300mA.
Does the MAX6796TPWD2+ support watchdog timer disable?
Yes, the MAX6796TPWD2+ supports watchdog disable via the WD-DIS pin (Pin 10). Driving WD-DIS low disables the watchdog function entirely, allowing the device to operate with only RESET supervision. This is confirmed in the Functional Diagram (page 14) and Electrical Characteristics table for logic inputs.
What is the meaning of the 'D2' suffix in MAX6796TPWD2+?
The 'D2' suffix in MAX6796TPWD2+ specifies two factory-programmed settings: 'D' denotes fixed 5V output voltage, and 'D2' selects the 12.5ms fixed reset timeout period (tRP). This value is implemented by internal resistor calibration - no external capacitor required on CSRT when using this variant.
Can the MAX6796TPWD2+ be used without an external p-channel MOSFET?
Yes, the MAX6796TPWD2+ operates fully without external MOSFETs. The GATEP pin is optional and only required if reverse-battery protection is needed. When unused, GATEP may be left floating or tied to IN. All regulation, RESET, watchdog, and power-fail functions remain fully operational without it.
Is the MAX6796TPWD2+ pin-compatible with other MAX679x devices?
Yes, the MAX6796TPWD2+ shares identical 20-pin TQFN-EP pinout and footprint with MAX6791–MAX6796 family members. However, pin functionality differs: MAX6796 lacks ENABLE2, OUT2, and SET1 pins present in dual-output variants, and includes WD-DIS instead of WDS0/WDS1 - verified in the Pin Description table (pages 10–11).
MAX6796TPWD2+ 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:
- 8.75ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6796TPWD2+ FAQ
1.How can I place an order for MAX6796TPWD2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6796TPWD2+ 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 MAX6796TPWD2+ reliable?
The price and inventory of MAX6796TPWD2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6796TPWD2+ is usually 5 days.
3.What payment methods are accepted for MAX6796TPWD2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6796TPWD2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6796TPWD2+?
MAX6796TPWD2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6796TPWD2+ 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 MAX6796TPWD2+?
For technical support, including MAX6796TPWD2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6796TPWD2+ requirements.
6.How does Aetrix verify that MAX6796TPWD2+ is sourced from the original manufacturer or authorized distributors?
All MAX6796TPWD2+ 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 MAX6796TPWD2+ meets industry standards.
7.What is the process for return or replacement of MAX6796TPWD2+?
All MAX6796TPWD2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6796TPWD2+, 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 MAX6796TPWD2+ part is unused and in its original packaging.
Return procedure for MAX6796TPWD2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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