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Analog Devices Inc./Maxim Integrated MAX6793TPWD4+T
- Part No.:
- MAX6793TPWD4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPWD4+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,029
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Product details
Overview
MAX6793TPWD4+T from Maxim Integrated is a dual-output, ultra-low-quiescent-current linear regulator for automotive systems, delivering up to 150mA per output with 5V/3.3V preset options, 68μA supply current, and 5V–72V input range. It integrates reset supervision, watchdog timer, and hold functionality for engine control units and body electronics.
For engineers reviewing the MAX6793TPWD4+T datasheet, MAX6793TPWD4+T pinout, MAX6793TPWD4+T application, or MAX6793TPWD4+T equivalent, key selection criteria include dual 150mA outputs, fixed 5V + adjustable 3.3V configuration, 200ms reset timeout (D4), AEC-Q100-qualified thermal performance, and TQFN-20 package compatibility with high-ambient automotive environments.
Technical Context
The MAX6793TPWD4+T implements two independent LDO regulators: OUT1 (adjustable or preset) and fixed 5V OUT2. Its supervisory block features an open-drain RESET output with 92.5% reset threshold relative to OUT1 and capacitor-adjustable or internally fixed 200ms reset timeout (CSRT = D4).
It includes a standard watchdog timer (not windowed) with 280ms minimum timeout, disable-capable via WD-DIS, and supports reverse-battery protection via GATEP-driven pFET. HOLD input enables self-holding operation without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external clamping |
| Quiescent Current | 68μA typical - enables always-on functionality in battery-sensitive applications |
| Output Current | 150mA per output - sufficient for microcontroller cores and CAN transceivers |
| Reset Timeout | 200ms (D4 code) - ensures reliable microprocessor initialization after brownout recovery |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive deployment |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced for 2.7W dissipation at high ambient |
| Reset Threshold | 92.5% of OUT1 nominal voltage - provides accurate undervoltage detection for 3.3V rail |
Pinout & Package
MAX6793TPWD4+T is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND. The package supports high-power dissipation in compact automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | Configured as 3.3V preset output (per ordering code 'W' in position 3); requires ≥10μF output capacitance |
| OUT2 | Regulator 2 Output | Fixed 5V output; supplies auxiliary logic or interface ICs independently of OUT1 |
| ENABLE1 / ENABLE2 | Active-High Enable Inputs | Independent control of each regulator; internal 0.5μA pulldown enables default-off behavior |
| HOLD | Active-Low Hold Input | Forces OUT1/OUT2 ON even after ENABLE1/ENABLE2 goes low - enables ignition-key self-hold circuits |
| RESET | Active-Low Reset Output | Open-drain output asserting low during OUT1 undervoltage or watchdog fault; timing tied to CSRT = D4 (200ms) |
| WDI / WD-DIS | Watchdog Input / Disable | WDI monitors microcontroller heartbeat; WD-DIS pin allows hardware-level watchdog disable without firmware change |
| GATEP | pFET Gate Drive | Drives external p-channel MOSFET for reverse-battery protection - eliminates series diode losses |
| PFI / PFO | Power-Fail Input / Output | PFI accepts resistive divider for custom brownout threshold; PFO provides early warning signal before main rail collapse |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables split-rail power domains: 3.3V MCU core + 5V I/O/peripheral supply from single high-voltage source |
| 200ms fixed reset timeout (D4) | Guarantees sufficient reset assertion time for slow-starting microcontrollers after cold-crank recovery |
| HOLD input with self-holding logic | Eliminates need for external latch or microcontroller GPIO to maintain regulator state during key-off transient |
| Reverse-battery protection via GATEP | Reduces system BOM by replacing Schottky diode with low-loss pFET solution - improves efficiency and thermal margin |
| AEC-Q100 qualified operation | Validated for automotive Grade 0 (−40°C to +125°C) - supports direct integration into ECU and ADAS modules |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering 32-bit MCU and CAN transceiver during cold-crank (6V battery sag) and load-dump (80V transients). IC Role / Device Role / Timing Role: Dual LDO delivers stable 3.3V core and 5V I/O rails while RESET asserts during undervoltage and holds until 200ms post-recovery. Use Value: Prevents MCU lockup during cranking; 68μA quiescent current minimizes battery drain in sleep mode. | Use Scenario: Supplying door module microcontroller, LIN transceiver, and LED drivers in 12V vehicle architecture. IC Role / Device Role / Timing Role: Regulator provides isolated 3.3V/5V rails; HOLD input sustains power during brief ignition switch bounce or contact chatter. Use Value: Eliminates need for external latching circuit; 5V–72V input range accommodates wide battery voltage swings. |
| Advanced Driver Assistance Systems (ADAS) | Telematics Control Unit (TCU) |
Use Scenario: Powering radar sensor SoC and image signal processor in front-end camera module. IC Role / Device Role / Timing Role: Dual output supplies separate domains; watchdog monitors SoC health and triggers RESET on firmware hang. Use Value: 280ms watchdog timeout prevents false resets during burst processing; AEC-Q100 qualification ensures reliability in safety-critical path. | Use Scenario: Supporting LTE modem, GNSS receiver, and secure element in connected vehicle gateway. IC Role / Device Role / Timing Role: Provides clean 3.3V domain for RF components and 5V for USB/UART interfaces; PFI monitors backup battery voltage. Use Value: PFO alerts host MCU of impending backup power loss, enabling graceful data save and shutdown sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPWD4+T | Dual-output variant with identical pinout, specs, and D4 reset timeout; differs only in watchdog windowing (MAX6794 supports windowed mode, MAX6793 does not) | Required where min/max watchdog fault detection is needed (e.g., ASIL-B diagnostics) | Select MAX6794TPWD4+T only if windowed watchdog functionality is mandated; otherwise MAX6793TPWD4+T offers simpler timing behavior. |
| TLV70733PDQNR | Single-output 3.3V LDO (200mA), 5.5V max input, no watchdog/reset supervision, SOT-23-5 package | Limited to low-voltage, non-safety-critical subsystems without supervision requirements | Use only for cost-sensitive, non-automotive applications lacking high-voltage input or system monitoring needs. |
Compared with MAX6794TPWD4+T, the MAX6793TPWD4+T omits windowed watchdog capability but simplifies timing validation; versus TLV70733PDQNR, it delivers full automotive-grade supervision, 72V tolerance, and dual-rail support - making it irreplaceable in ECU/BCM designs requiring functional safety compliance.
Availability
MAX6793TPWD4+T is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and advanced driver assistance systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6793TPWD4+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 and mixed-signal ICs for automotive, industrial, and communications markets.
The MAX6791–MAX6796 product line targets high-reliability automotive power management, integrating regulation, supervision, and protection functions into single-chip solutions for harsh-environment ECUs and ADAS modules.
FAQ
What output voltage configuration does MAX6793TPWD4+T provide?
The MAX6793TPWD4+T is a dual-output regulator with OUT1 preset to 3.3V (indicated by 'W' in the third placeholder of the part number) and OUT2 fixed at 5V. It does not support adjustable output in this variant - the SET1 pin must be grounded to activate the 3.3V preset. This configuration is validated across −40°C to +125°C.
How is the 200ms reset timeout implemented in MAX6793TPWD4+T?
The MAX6793TPWD4+T uses the D4 reset timeout code, which configures CSRT to deliver a fixed 200ms reset assertion period after OUT1 recovers above its 92.5% threshold. No external capacitor is required - the timing is internally trimmed and temperature-compensated across the full operating range.
Does MAX6793TPWD4+T support watchdog disable functionality?
Yes, MAX6793TPWD4+T supports hardware watchdog disable via the WD-DIS pin: driving WD-DIS low disables the watchdog timer entirely, preventing any WDI-related reset assertions. This provides fail-safe control independent of firmware state - critical for diagnostic modes or safety shutdown sequences.
What is the role of the HOLD pin in MAX6793TPWD4+T, and how does it interact with ENABLE1/ENABLE2?
The HOLD pin in MAX6793TPWD4+T forces OUT1/OUT2 to remain active even after ENABLE1 or ENABLE2 is pulled low. Once enabled, pulling HOLD low creates a self-holding state; releasing HOLD shuts down both outputs. This eliminates external latching components and enables robust ignition-switch interface in automotive body electronics.
Is MAX6793TPWD4+T qualified for automotive use, and what standards does it meet?
Yes, MAX6793TPWD4+T is AEC-Q100 qualified for automotive Grade 0 (−40°C to +125°C) operation. It meets stringent requirements for thermal stability, ESD immunity, and long-term reliability in under-hood environments. The device is manufactured in an IATF 16949-certified facility and supports PPAP documentation upon request.
MAX6793TPWD4+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:
- 2
- Voltage - Threshold:
- 1.665V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPWD4+T FAQ
1.How can I place an order for MAX6793TPWD4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPWD4+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 MAX6793TPWD4+T reliable?
The price and inventory of MAX6793TPWD4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPWD4+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPWD4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPWD4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPWD4+T?
MAX6793TPWD4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPWD4+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 MAX6793TPWD4+T?
For technical support, including MAX6793TPWD4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPWD4+T requirements.
6.How does Aetrix verify that MAX6793TPWD4+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPWD4+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 MAX6793TPWD4+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPWD4+T?
All MAX6793TPWD4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPWD4+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 MAX6793TPWD4+T part is unused and in its original packaging.
Return procedure for MAX6793TPWD4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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