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Analog Devices Inc./Maxim Integrated MAX6796TPWD3+
- Part No.:
- MAX6796TPWD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6796TPWD3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,585
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Product details
Overview
MAX6796TPWD3+ 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 68μA quiescent current, 5V fixed output (per ordering code WD3), and includes RESET, watchdog, ENABLE, and HOLD functionality - deployed in engine control units and body electronics under load-dump conditions.
For engineers reviewing the MAX6796TPWD3+ datasheet, MAX6796TPWD3+ pinout, MAX6796TPWD3+ application, or MAX6796TPWD3+ equivalent, key selection criteria include its AEC-Q100-relevant -40°C to +125°C operation, 50ms reset timeout (D3), 87.5% reset threshold (W suffix), thermal protection, and TQFN-20 package compatibility with high-ambient automotive environments.
Technical Context
The MAX6796TPWD3+ implements a single high-voltage LDO regulator with internal pFET pass element and dual-mode supervisory circuitry: a fixed-threshold RESET output (asserted when OUT drops below 87.5% of nominal) and a watchdog timer with fixed 280ms timeout (CSWT = OUT). Its HOLD input enables self-holding behavior without external components by latching ON state after initial ENABLE assertion.
It integrates reverse-battery protection via GATEP-driven p-channel MOSFET, power-fail detection (PFI/PFO with 1.231V reference), and overvoltage/overcurrent/thermal shutdown protections - all specified across full -40°C to +125°C junction temperature range and qualified per AEC-Q100 stress test requirements.
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 continuous - supports microcontroller core rails and CAN transceivers in compact ECUs |
| Quiescent Current | 68μA typical - enables always-on battery monitoring with <100μA system standby draw |
| Reset Timeout | 50ms (D3 code) - ensures reliable µP initialization after brownout recovery |
| Reset Threshold | 87.5% of VOUT (W code) - provides margin against output droop during cold-crank |
| Dropout Voltage | 420mV typ at 100mA - sustains regulation down to VIN = 5.42V for 5V output |
| Operating Temp | -40°C to +125°C - fully specified for under-hood automotive placement |
Pinout & Package
MAX6796TPWD3+ uses a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND for low-junction-to-board thermal resistance (supports 2.7W dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT | Regulator output (5V fixed per WD3); requires ≥10μF ceramic capacitor to GND for stability |
| 3 | SET | Feedback input; grounded for 5V preset mode (WD3), or used with resistor divider for adjustable outputs |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - signals early battery sag |
| 5 | CSWT | Watchdog timeout adjust; tied to OUT for fixed 280ms timeout (standard for MAX6796) |
| 6 | CSRT | Reset timeout adjust; tied to OUT for fixed 50ms timeout (D3 code) |
| 7 | GND | Power and signal ground reference; EP must be soldered to PCB ground plane |
| 8 | RESET | Active-low push-pull reset output; asserts during VOUT undervoltage or watchdog fault |
| 11 | WDI | Watchdog input; requires edge transition every ≤280ms to prevent reset assertion |
| 12 | HOLD | Active-low hold enable; latches regulator ON after initial ENABLE pulse - enables ignition-key hold circuits |
| 16 | PFI | Power-fail comparator input; configured with 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; internally pulled down (0.5μA sink) - driven by ignition switch or MCU GPIO |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (68μA) | Enables >10-year battery life in always-on vehicle modules without wake-up leakage penalties |
| 72V Absolute Max Input | Eliminates need for external TVS or Zener clamping in 24V commercial vehicle systems |
| Integrated HOLD Function | Replaces discrete latch circuitry - reduces BOM count and PCB area in ignition-controlled power domains |
| Reverse-Battery Protection Driver | GATEP output drives pFET to block -18V reverse polarity - replaces lossy series diode with <50mΩ RDS(on) path |
| AEC-Q100 Stress Tested | Validated for automotive qualification including HTOL, TC, UHAST, and ESD - supports PPAP documentation |
Applications
| Engine Control Unit (ECU) Power Supply | Body Control Module (BCM) Core Rail |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN FD transceiver, and analog sensors in gasoline/diesel engine bay under wide ambient (-40°C to +125°C) and transient (load dump, cold crank) conditions. IC Role / Device Role / Timing Role: Primary 5V LDO regulator with integrated reset supervision and watchdog - ensures deterministic MCU boot and runtime fault recovery. Use Value: 68μA IQ extends stop-start battery life; 72V input tolerance avoids external clamping; HOLD function enables ignition-switched latching without external components. | Use Scenario: Supplies 5V rail to door module MCU, LIN transceivers, and LED drivers in passenger compartment with strict EMC and thermal constraints. IC Role / Device Role / Timing Role: Single-point power source with PFI-based battery voltage monitoring and programmable reset timing for graceful shutdown during low-battery events. Use Value: PFO output triggers firmware-initiated safe shutdown before deep discharge; 50ms D3 reset timeout prevents spurious resets during alternator ripple. |
| Telematics Control Unit (TCU) Always-On Domain | Advanced Driver Assistance Systems (ADAS) Camera Power |
Use Scenario: Provides always-on 5V supply to GNSS receiver, cellular modem, and secure element in parked vehicle mode with <100μA total system IQ. IC Role / Device Role / Timing Role: Low-IQ supervisor-regulator hybrid - maintains RTC and wake-up logic while enabling fast, reliable MCU restart on cellular event interrupt. Use Value: 68μA quiescent current meets OEM parked-power budgets; watchdog ensures modem firmware remains responsive during extended sleep cycles. | Use Scenario: Powers image sensor and ISP in rear-view camera module mounted in trunk/hatch, exposed to thermal cycling and vibration. IC Role / Device Role / Timing Role: High-reliability 5V regulator with thermal shutdown and output overvoltage protection - safeguards sensitive CMOS image sensors from supply faults. Use Value: 165°C thermal shutdown with 20°C hysteresis prevents latch-up; output OVP clamps at 105–110% VOUT to protect sensor I/O pins. |
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 |
|---|---|---|---|
| MAX6795TPWD3+ | Identical electrical specs and pinout; differs only in tape-and-reel packaging (2.5k vs. standard reel) | No functional difference; suitable for same designs but may impact procurement logistics | Select MAX6795TPWD3+ only if volume order quantity aligns with 2.5k reel size |
| TLV70733PDQNR | Lower voltage range (2.5V–6.5V), no watchdog or HOLD, 250mA output, SOT-23-5 package | Limited to 12V systems without load-dump immunity; lacks automotive supervisory features | Only consider for non-automotive, low-cost, low-power applications where 72V tolerance and AEC-Q100 are not required |
Compared with MAX6795TPWD3+, the MAX6796TPWD3+ offers identical regulation and supervision but is optimized for standard packaging and broader distribution; versus TLV70733PDQNR, it delivers 2.9× higher input voltage range, integrated watchdog/HOLD, and AEC-Q100 qualification - essential for automotive deployment.
Availability
MAX6796TPWD3+ is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and telematics systems requiring stable component supply across extended temperature and high-reliability operating conditions.
Supply support for MAX6796TPWD3+ 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-voltage LDO regulation with integrated reset, watchdog, power-fail detection, and reverse-battery protection in a single AEC-Q100-qualified device.
FAQ
What output voltage does MAX6796TPWD3+ deliver?
The MAX6796TPWD3+ delivers a fixed 5V output. The "WD3" suffix indicates W = 87.5% reset threshold and D3 = 50ms reset timeout; the "5V" output is confirmed by the ordering guide and electrical characteristics tables showing VOUT = 4.85V–5.15V at 300mA load. This preset voltage is selected by grounding the SET pin, eliminating external feedback resistors.
Does MAX6796TPWD3+ support reverse-battery protection?
Yes, MAX6796TPWD3+ supports reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. When reverse polarity is applied, the internal circuitry disables GATEP, blocking current flow. This eliminates the power loss and heat generation of a series Schottky diode, achieving near-zero forward voltage drop in normal operation.
What is the watchdog timeout behavior of MAX6796TPWD3+?
The MAX6796TPWD3+ features a fixed 280ms minimum watchdog timeout period (tWD2), activated when CSWT is tied to OUT. If WDI receives no valid edge transition within this window, RESET asserts for the configured reset timeout (50ms for D3). The watchdog can be disabled by driving WD-DIS low, and it clears automatically upon RESET assertion or valid WDI toggle.
How does the HOLD function operate in MAX6796TPWD3+?
In MAX6796TPWD3+, the HOLD pin enables self-holding: when ENABLE is pulsed high to start regulation, then pulled low, asserting HOLD low afterward keeps OUT active. Releasing HOLD (letting it float or pulling high) shuts down the regulator. HOLD is internally pulled up to OUT with 2µA, so connecting it to OUT creates a latched state without external components.
Is MAX6796TPWD3+ qualified for automotive use?
Yes, MAX6796TPWD3+ is AEC-Q100 qualified - explicitly stated in the datasheet for related variants (e.g., MAX6795TPLD2/V+) and confirmed by its -40°C to +125°C operating range, 72V absolute maximum input, and inclusion of automotive-specific features like load-dump tolerance, reverse-battery protection, and thermal shutdown with hysteresis.
MAX6796TPWD3+ 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:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6796TPWD3+ FAQ
1.How can I place an order for MAX6796TPWD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6796TPWD3+ 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 MAX6796TPWD3+ reliable?
The price and inventory of MAX6796TPWD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6796TPWD3+ is usually 5 days.
3.What payment methods are accepted for MAX6796TPWD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6796TPWD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6796TPWD3+?
MAX6796TPWD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6796TPWD3+ 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 MAX6796TPWD3+?
For technical support, including MAX6796TPWD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6796TPWD3+ requirements.
6.How does Aetrix verify that MAX6796TPWD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6796TPWD3+ 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 MAX6796TPWD3+ meets industry standards.
7.What is the process for return or replacement of MAX6796TPWD3+?
All MAX6796TPWD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6796TPWD3+, 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 MAX6796TPWD3+ part is unused and in its original packaging.
Return procedure for MAX6796TPWD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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