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Analog Devices Inc./Maxim Integrated MAX6793TPSD4+T
- Part No.:
- MAX6793TPSD4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPSD4+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,312
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Product details
Overview
The MAX6793TPSD4+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive power management. It delivers up to 150mA per output (OUT1 and fixed 5V OUT2), operates from 5V to 72V input, consumes only 68μA quiescent current, and features a 200ms reset timeout (D4) and 87.5% reset threshold for OUT1 - ideal for engine control units under load-dump conditions.
For engineers reviewing the MAX6793TPSD4+T datasheet, MAX6793TPSD4+T pinout, MAX6793TPSD4+T application, or MAX6793TPSD4+T equivalent, this page provides verified technical context, exact pin functionality, automotive-grade thermal performance (–40°C to +125°C), watchdog disable capability via WD-DIS, and confirmed dual-enable control (ENABLE1/ENABLE2) for independent output sequencing.
Technical Context
The MAX6793TPSD4+T implements two independent LDO regulators: OUT1 is adjustable (1.8V–11V) or preset (5V/3.3V/2.5V/1.8V) via SET1, while OUT2 is fixed at 5V. Its RESET output asserts low when OUT1 drops below 87.5% of nominal voltage and holds for 200ms after recovery - configured by CSRT = D4 (140–260ms range).
It integrates a fixed 280ms watchdog timeout (CSWT = OUT1), disableable via WD-DIS pin, and supports self-holding operation via HOLD input - enabling ignition-triggered latching without external components. Thermal shutdown activates at +165°C with 20°C hysteresis, and reverse-battery protection is implemented through GATEP-driven pFET control.
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 ECU modules with ultra-low standby power |
| Output Current | 150mA per output (OUT1 & OUT2) - sufficient for microcontroller core + I/O rail sequencing |
| Reset Timeout | 200ms (D4 option) - ensures reliable µP reset hold time after brownout recovery |
| Reset Threshold | 87.5% of OUT1 nominal voltage - matches standard 5V/3.3V logic supply monitoring |
| 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 |
Pinout & Package
MAX6793TPSD4+T uses a 20-pin thermally enhanced TQFN-EP package (5mm × 5mm, exposed pad connected to GND). Pinout is identical to MAX6793/MAX6794 family members per datasheet Figure 1 and Pin Description Table (pages 9–11).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Main adjustable or preset regulator output (150mA max); requires ≥10μF ceramic capacitor to GND |
| 3 | SET1 | Feedback input - tied to GND for preset voltage, or used with resistor divider for 1.8V–11V adjustment |
| 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 OUT1 for fixed 280ms timeout; capacitor to GND enables adjustment |
| 6 | CSRT | Reset timeout adjust - connected to OUT1 for D4 (200ms) fixed timeout; capacitor enables user-defined delay |
| 7 | GND | Analog/digital ground reference and thermal path via exposed pad |
| 8 | RESET | Active-low push-pull reset output - drives µP reset pin directly; asserts on OUT1 undervoltage or watchdog fault |
| 9,10 | WDS1, WDS0 | Windowed watchdog ratio select - unused in MAX6793; N.C. per pin table (page 11) |
| 11 | WDI | Watchdog input - requires edge transition within timeout period; resets watchdog counter on valid toggle |
| 12 | HOLD | Active-low hold enable - forces OUT1 ON even if ENABLE1 goes low; enables self-holding ignition circuits |
| 13,14 | OUT2 | Fixed 5V output (150mA max); dedicated rail for sensors or CAN transceivers |
| 15 | ENABLE2 | Active-high enable for OUT2 - independent control allows staggered power-up of dual rails |
| 16 | PFI | Power-fail comparator input - set via resistor divider to monitor battery or pre-regulated supply voltage |
| 17,18 | IN | Main regulator input - bypassed with 1μF capacitor; accepts full 5V–72V automotive range |
| 19 | GATEP | pFET gate drive - controls external high-side p-channel MOSFET for reverse-battery protection |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5μA pulldown enables default-OFF behavior |
| EP | Exposed Pad | Internally connected to GND - must be soldered to PCB ground plane for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | ENABLE1 controls OUT1; ENABLE2 controls OUT2 - enables flexible power-rail sequencing in multi-voltage ECUs |
| Self-holding circuit support | HOLD input latches OUT1 ON after initial enable - eliminates need for external latch or microcontroller GPIO |
| Reverse-battery protection driver | GATEP output drives pFET gate - replaces lossy series diode with <100mΩ RDS(on) protection |
| Adjustable power-fail detection | PFI input referenced to 1.231V threshold - sets custom brownout point via resistor divider (e.g., 9V battery warning) |
| Thermal & short-circuit protection | +165°C shutdown with 20°C hysteresis and 240mA short-circuit limit - ensures robustness during fault conditions |
| AEC-Q100 stress qualification | Validated per AEC-Q100 Rev H - meets automotive reliability requirements for under-hood deployment |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering MCU core (3.3V) and CAN transceiver (5V) in gasoline/diesel engine management systems exposed to 72V load-dump transients. IC Role / Device Role / Timing Role: Dual-output LDO regulator with independent enable and reset supervision - provides sequenced, monitored power rails. Use Value: 68μA quiescent current extends battery life in key-off mode; 200ms reset hold prevents MCU lockup during cranking-induced brownouts. |
Use Scenario: Supplying door module microcontrollers and LIN transceivers in 12V vehicle architectures with frequent sleep/wake cycles. IC Role / Device Role / Timing Role: Always-on supervisor with HOLD-latched OUT1 - maintains MCU RTC and wake-up logic without continuous enable signal. Use Value: HOLD input enables ignition-key-triggered latching; WD-DIS allows watchdog disable during bootloader execution. |
| Advanced Driver Assistance Systems (ADAS) | Telematics Control Unit (TCU) |
Use Scenario: Powering vision processor I/O banks and radar sensor interfaces in front-camera modules operating at –40°C to +125°C. IC Role / Device Role / Timing Role: High-temp-stable dual LDO with thermal shutdown - delivers clean, sequenced rails under extreme ambient conditions. Use Value: 5mm × 5mm TQFN-EP package dissipates 2.7W continuously; 150mA per rail supports multiple high-speed interface supplies. |
Use Scenario: Regulating LTE modem, GNSS receiver, and eSIM power domains in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Supervisory regulator with PFI-based battery monitoring - triggers graceful shutdown before deep discharge. Use Value: PFI input detects 10.5V battery sag; PFO output signals host processor to save state and suspend non-critical functions. |
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 |
|---|---|---|---|
| MAX6794TPSD4+T | Dual-output like MAX6793TPSD4+T but includes windowed watchdog (WDS0/WDS1 pins active) | Required where min/max watchdog timing windows are needed for safety-critical firmware validation | Select MAX6794TPSD4+T only if windowed watchdog functionality is mandated; otherwise MAX6793TPSD4+T offers simpler implementation |
| TLV70733PDQNR | Single 3.3V output, 200mA, 5.5V max input, no watchdog or RESET - lacks automotive voltage range and supervision | Suitable only for low-voltage post-regulation in non-automotive embedded systems | Not a functional substitute; use only in 3.3V, ≤5.5V, non-automotive designs without supervision requirements |
Compared with MAX6794TPSD4+T, the MAX6793TPSD4+T omits windowed watchdog logic - reducing pin count and configuration complexity while retaining identical regulation, reset, and enable functionality. Compared with TLV70733PDQNR, it supports 72V input, dual outputs, and full automotive supervision - making it the only viable option for under-hood ECU power management.
Availability
MAX6793TPSD4+T is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera systems, and telematics gateways requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6793TPSD4+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 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 output voltage options does the MAX6793TPSD4+T support?
The MAX6793TPSD4+T supports preset OUT1 voltages of 5.0V, 3.3V, 2.5V, or 1.8V (selected by grounding SET1), and an adjustable range from 1.8V to 11V using an external resistor divider. OUT2 is fixed at 5.0V. The "SD4" suffix confirms 3.3V OUT1 with 87.5% reset threshold and 200ms reset timeout - verified in Maxim's Ordering Information table.
Does the MAX6793TPSD4+T include reverse-battery protection?
Yes, the MAX6793TPSD4+T integrates reverse-battery protection via its GATEP pin, which drives the gate of an external p-channel MOSFET. This eliminates the need for series Schottky diodes, reducing voltage drop and power loss. The internal clamp limits GATEP-to-IN voltage to 18.8V max, ensuring safe MOSFET gate control during reverse-polarity events.
How is the 200ms reset timeout configured on the MAX6793TPSD4+T?
The MAX6793TPSD4+T achieves its 200ms reset timeout (D4 option) by connecting the CSRT pin to OUT1, selecting the internally fixed timeout value. Per Electrical Characteristics table (page 4), D4 corresponds to 140–260ms (typ 200ms) - confirmed by the "D4" in the part number and supported by the CSRT ramp current (800–1250nA) and threshold (1.185–1.255V) specifications.
Can the watchdog function be disabled on the MAX6793TPSD4+T?
Yes, the watchdog function on the MAX6793TPSD4+T is disabled by driving the WD-DIS pin low. When WD-DIS is low, the watchdog timer is inactive and WDI transitions have no effect. This is distinct from MAX6791/MAX6792, which require WDS0/WDS1 logic; MAX6793TPSD4+T uses WD-DIS for simple, dedicated disable control - verified in Pin Description (page 11) and Functional Diagram (page 13).
What is the thermal performance of the MAX6793TPSD4+T package?
The MAX6793TPSD4+T uses a 20-pin TQFN-EP package (5mm × 5mm) with exposed pad connected to GND. It dissipates up to 2.7W continuously, supporting operation at high ambient temperatures, elevated battery voltage (e.g., 42V), and full 150mA load per output - validated by the 2666.7mW derated power dissipation rating at +70°C and +165°C thermal shutdown threshold.
MAX6793TPSD4+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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPSD4+T FAQ
1.How can I place an order for MAX6793TPSD4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPSD4+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 MAX6793TPSD4+T reliable?
The price and inventory of MAX6793TPSD4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPSD4+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPSD4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPSD4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPSD4+T?
MAX6793TPSD4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPSD4+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 MAX6793TPSD4+T?
For technical support, including MAX6793TPSD4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPSD4+T requirements.
6.How does Aetrix verify that MAX6793TPSD4+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPSD4+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 MAX6793TPSD4+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPSD4+T?
All MAX6793TPSD4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPSD4+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 MAX6793TPSD4+T part is unused and in its original packaging.
Return procedure for MAX6793TPSD4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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