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Analog Devices Inc./Maxim Integrated MAX6793TPSD3+T
- Part No.:
- MAX6793TPSD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPSD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,737
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Product details
Overview
MAX6793TPSD3+T from Maxim Integrated is a dual-output, ultra-low-quiescent-current linear regulator IC designed for automotive power management. It delivers up to 150mA per output (OUT1 and OUT2), supports 5V to 72V input range, features fixed 3.3V OUT1 and fixed 5V OUT2, and includes integrated reset, watchdog, and hold functionality - enabling robust microcontroller supervision in engine control units and body electronics.
For engineers reviewing the MAX6793TPSD3+T datasheet, MAX6793TPSD3+T pinout, MAX6793TPSD3+T application, or MAX6793TPSD3+T equivalent, key selection criteria include its 87.5% reset threshold on OUT1, 50ms capacitor-adjustable reset timeout (D3 code), dual enable inputs, and AEC-Q100-compatible thermal performance across −40°C to +125°C.
Technical Context
The MAX6793TPSD3+T implements two independent LDO regulators: OUT1 (3.3V fixed, 150mA max) and OUT2 (5V fixed, 150mA max), each with separate ENABLE1/ENABLE2 control. Its supervisory block integrates a push-pull or open-drain RESET output triggered when either regulated output falls below 87.5% of nominal voltage, with reset assertion held for 50ms after recovery.
It features a programmable watchdog timer with fixed 280ms timeout (CSWT = OUT1) or capacitor-adjustable period, plus a HOLD input that sustains regulation even after ENABLE1 deactivation - critical for ignition-switched automotive subsystems requiring self-holding behavior without external latching circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external protection. |
| Quiescent Current | 68μA typical - enables always-on battery monitoring with minimal parasitic drain. |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for MCU cores, CAN transceivers, and sensor interfaces. |
| Reset Threshold | 87.5% of OUT1 nominal (3.3V → 2.888V min) - ensures reliable brownout detection before logic failure. |
| Reset Timeout | 50ms (D3 code) - provides adequate hold time for microcontroller initialization sequences. |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive environments. |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced for 2.7W dissipation at high ambient temperatures. |
Pinout & Package
MAX6793TPSD3+T is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN package with exposed pad (EP) connected internally to GND. The package supports up to 2.7W continuous power dissipation and is qualified for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Regulator 1 Output | Fixed 3.3V output (150mA max); requires ≥10µF ceramic capacitor to GND for stability. |
| OUT2 | Regulator 2 Output | Fixed 5V output (150mA max); independent of OUT1, with dedicated ENABLE2 control. |
| ENABLE1 / ENABLE2 | Active-High Enable Inputs | Separately control OUT1 and OUT2; each internally pulled down (0.5µA sink) for default OFF state. |
| HOLD | Active-Low Hold Input | When pulled low, maintains OUT1/OUT2 ON even if ENABLE1/ENABLE2 goes low - enables self-holding ignition circuits. |
| RESET | Active-Low Reset Output | Push-pull or open-drain; asserts low during OUT1/OUT2 undervoltage or watchdog timeout, held for 50ms post-recovery. |
| WDI | Watchdog Input | Edge-sensitive; reset triggered if no transition occurs within 280ms (fixed timeout) or adjustable period set by CSWT. |
| CSRT | Reset Timeout Adjust | Connected to OUT1 for fixed 50ms timeout (D3); capacitor-to-GND enables user-defined delay. |
| PFO | Power-Fail Comparator Output | Open-drain active-low signal asserting when PFI < 1.231V - used for early battery-fail warning. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables simultaneous 3.3V MCU core and 5V peripheral rail generation with separate enable control. |
| Hold-input latching | Eliminates need for external flip-flops or latch circuits in ignition-controlled systems. |
| Integrated reverse-battery protection driver | GATEP pin drives external pFET to replace lossy series diodes - reduces voltage drop and heat. |
| Adjustable power-fail threshold | PFI input accepts resistive divider to set custom battery-undervoltage warning level (e.g., 9V cutoff). |
| Thermal & short-circuit protection | Shuts down at +165°C with 20°C hysteresis; limits output current to ~240mA during fault conditions. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering 32-bit MCU, CAN transceiver, and analog sensors in engine bay under wide temperature and load-dump conditions. IC Role / Device Role / Timing Role: Dual LDO regulator + supervisor providing clean, sequenced 3.3V/5V rails and deterministic reset timing during cold cranking. Use Value: 72V input tolerance and −40°C to +125°C operation ensure uninterrupted function during extreme automotive transients. | Use Scenario: Supplying door module microcontrollers and LIN transceivers with fail-safe reset and watchdog supervision. IC Role / Device Role / Timing Role: Regulator with HOLD input maintains power during ignition switch bounce; RESET prevents firmware corruption during battery disconnect. Use Value: Self-holding capability eliminates external latching hardware, reducing BOM count and PCB area. |
| Advanced Driver Assistance Systems (ADAS) | Telematics Control Unit (TCU) |
Use Scenario: Powering vision processor SoC I/O rails and image sensor interfaces where low quiescent current extends sleep-mode battery life. IC Role / Device Role / Timing Role: Micropower dual regulator delivering stable 3.3V/5V with 68μA IQ - minimizes standby drain in always-on ADAS cameras. Use Value: Ultra-low IQ enables >1-year battery backup for parking-mode vision systems without recharge. | Use Scenario: Managing power sequencing and reset integrity for cellular modem, GPS, and microcontroller in vehicle connectivity modules. IC Role / Device Role / Timing Role: Supervisory IC generating synchronized reset pulses and monitoring modem watchdog signals to prevent communication lockup. Use Value: Integrated watchdog with 280ms timeout and configurable windowing ensures modem firmware remains responsive during network handovers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6794TPSD3+T | Dual-output variant with identical 3.3V/5V outputs, same pinout, and identical D3 reset timeout - differs only in watchdog windowing capability (MAX6794 supports windowed watchdog; MAX6793 does not). | Used where windowed watchdog (min/max timing violation detection) is required for safety-critical firmware monitoring. | Select MAX6794TPSD3+T only if windowed watchdog functionality is needed; otherwise MAX6793TPSD3+T is functionally sufficient and cost-optimized. |
| TLV70733PDQNR | Single 3.3V LDO (200mA), 2.5V–5.5V input, no watchdog/reset supervision, SOT-23-5 package - lacks dual output, high-voltage capability, and automotive qualification. | Suitable only for non-automotive, low-voltage, single-rail applications without supervision requirements. | Not a functional replacement; only consider for cost-sensitive, non-automotive designs with ≤5.5V supply and no reset/watchdog needs. |
Compared with MAX6794TPSD3+T, the MAX6793TPSD3+T omits windowed watchdog support but retains identical regulation, reset, and hold functionality - making it ideal for standard automotive ECU applications where basic timeout supervision suffices. TLV70733PDQNR cannot replace it due to missing dual output, 72V tolerance, and AEC-Q100 compliance.
Availability
MAX6793TPSD3+T is available at Aetrix Electronics and suitable for automotive engine control, body electronics, ADAS camera modules, and telematics systems requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX6793TPSD3+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 delivers high-voltage, micropower linear regulators with integrated supervision - engineered specifically for automotive subsystems needing robust power sequencing, fault detection, and microcontroller reliability under harsh electrical conditions.
FAQ
What output voltages does the MAX6793TPSD3+T provide?
The MAX6793TPSD3+T provides two fixed outputs: OUT1 = 3.3V and OUT2 = 5V, each rated for up to 150mA. These are preset voltages - no external feedback resistors are required. The "S" in the part number denotes the 3.3V OUT1 option, and the "D" confirms dual-output configuration. The MAX6793TPSD3+T does not support adjustable output; that capability is reserved for variants with "A" or blank in the voltage placeholder position.
How is the 50ms reset timeout implemented in the MAX6793TPSD3+T?
The MAX6793TPSD3+T implements its 50ms reset timeout (denoted by "D3" in the part number) using an internal capacitor charging circuit referenced to the CSRT pin. When CSRT is tied to OUT1, the device selects the factory-trimmed 50ms timeout (with ±30% tolerance). For adjustable timing, connect an external capacitor from CSRT to GND - the timeout scales linearly (e.g., 15nF ≈ 50ms). This timing governs how long RESET stays asserted after OUT1 recovers above its 87.5% threshold.
Does the MAX6793TPSD3+T support watchdog disable functionality?
Yes, the MAX6793TPSD3+T supports watchdog disable via the WD-DIS pin (Pin 9). Driving WD-DIS low disables the watchdog timer entirely, preventing any WDI-triggered resets. When WD-DIS is high or connected to OUT1, the watchdog operates normally with its fixed 280ms timeout (or capacitor-adjustable period). This pin provides hardware-level control independent of WDS0/WDS1 logic, ensuring deterministic disable behavior even if microcontroller firmware is unresponsive.
What is the role of the HOLD pin on the MAX6793TPSD3+T?
The HOLD pin (Pin 12) on the MAX6793TPSD3+T enables self-holding operation: once OUT1/OUT2 is enabled via ENABLE1/ENABLE2, pulling HOLD low sustains regulation even if ENABLE1/ENABLE2 later goes low - mimicking a latched power switch. This is essential for automotive ignition circuits where the key signal is momentary. HOLD is internally pulled up to OUT1 with a 2µA current source, so leaving it unconnected allows standard enable/disable behavior.
Is the MAX6793TPSD3+T AEC-Q100 qualified?
The MAX6793TPSD3+T carries the "/V+" suffix in its full ordering designation (e.g., MAX6793TPSD3/V+T), indicating AEC-Q100 qualification. While the base part number MAX6793TPSD3+T reflects tape-and-reel packaging (the "T"), its underlying die and assembly meet AEC-Q100 Grade 0 (−40°C to +125°C) requirements. Full qualification documentation is available in Maxim's Automotive Reliability Report for the MAX6791–MAX6796 family.
MAX6793TPSD3+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:
- 2.888V, Adj
- Output:
- Open Drain or Open Collector
- 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)
MAX6793TPSD3+T FAQ
1.How can I place an order for MAX6793TPSD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPSD3+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 MAX6793TPSD3+T reliable?
The price and inventory of MAX6793TPSD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPSD3+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPSD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPSD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPSD3+T?
MAX6793TPSD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPSD3+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 MAX6793TPSD3+T?
For technical support, including MAX6793TPSD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPSD3+T requirements.
6.How does Aetrix verify that MAX6793TPSD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPSD3+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 MAX6793TPSD3+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPSD3+T?
All MAX6793TPSD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPSD3+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 MAX6793TPSD3+T part is unused and in its original packaging.
Return procedure for MAX6793TPSD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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