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Analog Devices Inc./Maxim Integrated MAX6792TPSD1+
- Part No.:
- MAX6792TPSD1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6792TPSD1+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
The MAX6792TPSD1+ from Maxim Integrated is a dual-output, ultra-low-quiescent-current linear regulator with integrated supervisory functions, designed for automotive power management. It delivers up to 150mA per output (OUT1 and OUT2), supports 5V to 72V input range, features 68μA quiescent current, and includes windowed watchdog timer, active-low RESET with capacitor-adjustable timeout, and HOLD-enabled self-holding circuitry - deployed in engine control units and body electronics requiring robust brownout recovery.
For engineers reviewing the MAX6792TPSD1+ datasheet, MAX6792TPSD1+ pinout, MAX6792TPSD1+ application, or MAX6792TPSD1+ equivalent, key selection criteria include its dual 5V/5V fixed outputs, -40°C to +125°C AEC-Q100–compatible operation, TQFN-20 package thermal performance (2.7W dissipation), and precise reset threshold tracking (92.5% of OUT1).
Technical Context
The MAX6792TPSD1+ implements a dual-LDO architecture with independent enable paths (ENABLE1 for OUT1, ENABLE2 for OUT2) and shared supervisory logic. Its windowed watchdog monitors WDI transitions against two thresholds (tWD1 fast fault, tWD2 slow fault), asserting RESET for the CSRT-defined timeout period upon violation - unlike standard single-timer watchdogs.
RESET is push-pull or open-drain configurable; the reset threshold is fixed at 92.5% of OUT1 nominal voltage (L/M option per ordering code), and the HOLD input enables latch-up behavior by overriding ENABLE1 shutdown - critical for ignition-controlled power sequencing in automotive microcontroller subsystems.
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 functionality in battery-sensitive systems |
| Output Current (per channel) | 150mA max - sufficient for MCU cores, CAN transceivers, and sensor interfaces |
| Dropout Voltage | 420mV typ at 100mA - ensures regulation down to VIN = VOUT + 0.42V under load |
| Reset Threshold Accuracy | ±1.5% over -40°C to +125°C - guarantees deterministic brownout detection across temperature |
| Watchdog Timeout Options | Fixed 280ms min or capacitor-adjustable - supports flexible firmware supervision timing |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive environments |
Pinout & Package
MAX6792TPSD1+ uses a 5mm × 5mm, 20-pin thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND for optimal thermal dissipation (2.7W continuous). Pin count and layout match the MAX6791–MAX6794 family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT1 | Dual-regulator primary output (5V fixed per S-code); requires ≥10μF ceramic bypass to GND |
| 3 | SET1 | Feedback node for OUT1; grounded for preset 5V, or connected to resistive divider for adjustable output |
| 4 | PFO | Open-drain power-fail output; asserts low when PFI < 1.231V - used for early battery warning |
| 5 | CSWT | Watchdog timeout adjust input; tied to OUT1 for fixed 280ms timeout or capacitor-to-GND for scaling |
| 6 | CSRT | Reset timeout adjust input; tied to OUT1 for fixed 50ms timeout (D3 code) or capacitor-to-GND |
| 7 | GND | Analog/digital ground reference; must be connected to PCB ground plane via EP |
| 8 | RESET | Active-low push-pull reset output; asserts during OUT1 undervoltage or watchdog fault |
| 9, 10 | WDS1, WDS0 | Windowed watchdog ratio select inputs; set to high/low for 8×, 16×, or 64× tWD1/tWD2 ratios |
| 11 | WDI | Watchdog input; rising/falling edge resets timer; violation triggers RESET for CSRT duration |
| 12 | HOLD | Active-low latch enable; forces OUT1 ON even after ENABLE1 goes low - enables self-hold circuits |
| 13, 14 | OUT2 | Secondary fixed 5V output; independent of OUT1 regulation and enable control |
| 15 | ENABLE2 | Active-high enable for OUT2; internal 0.5μA pulldown allows direct MCU GPIO control |
| 16 | PFI | Power-fail comparator input; referenced to 1.231V internal threshold - sets custom brownout point |
| 17, 18 | IN | Main regulator input; requires 1μF ceramic bypass to GND near pins for stability |
| 19 | GATEP | pFET gate driver; drives external p-channel MOSFET for reverse-battery protection |
| 20 | ENABLE1 | Active-high enable for OUT1; internal 0.5μA pulldown supports direct MCU control without pullup |
| EP | Exposed Pad | Internally connected to GND; must be soldered to PCB ground plane for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Enables detection of both stuck-high and stuck-low WDI faults - prevents false resets from noisy signals |
| HOLD-enabled self-holding | Eliminates need for external latching circuitry in ignition-switched systems - reduces BOM and board space |
| Reverse-battery protection drive (GATEP) | Directly controls external pFET to block reverse current - replaces lossy series diodes in 12V/24V systems |
| Capacitor-adjustable reset timeout | CSRT pin supports 35μs to 260ms timeout range - matches diverse MCU reset requirements |
| Thermal & short-circuit protection | Shuts down at +165°C with 20°C hysteresis; limits short-circuit current to 240mA - ensures safe failure mode |
Applications
| Engine Control Unit (ECU) Power Sequencing | Body Control Module (BCM) Supervision |
|---|---|
Use Scenario: Powers MCU, CAN transceiver, and analog sensors in gasoline/diesel ECUs where ignition switch initiates power but must remain stable during cranking dips. IC Role / Device Role / Timing Role: Dual 5V LDO provides clean, sequenced rails; HOLD latches ON during start-stop cycles; RESET monitors OUT1 for brownout recovery. Use Value: Eliminates external hold circuitry and ensures deterministic reset assertion during 5V rail collapse below 4.625V (92.5% of 5V). |
Use Scenario: Supplies power to door module microcontrollers and LIN transceivers in vehicles with variable battery voltage (9V–16V) and frequent sleep/wake transitions. IC Role / Device Role / Timing Role: OUT1 powers main MCU; OUT2 powers LIN PHY; PFI monitors battery via resistor divider to trigger graceful shutdown before deep discharge. Use Value: 68μA quiescent current extends battery life in sleep mode; PFO delay of 35μs enables timely software response to battery sag. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Telematics Control Unit (TCU) Reset Management |
Use Scenario: Powers image signal processor and serializer in rear-view or surround-view cameras mounted near hot engine compartments. IC Role / Device Role / Timing Role: Dual 5V outputs isolate noise-sensitive imaging chain; TQFN-20 package dissipates 2.7W at +125°C ambient; thermal shutdown protects silicon. Use Value: Maintains regulation through 72V load-dump events; dropout of 420mV at 100mA ensures stable 5V output even at VIN = 5.42V. |
Use Scenario: Manages power and reset for cellular modem, GPS, and MCU in vehicle telematics units requiring secure boot and watchdog supervision. IC Role / Device Role / Timing Role: Windowed watchdog (MAX6792-specific) detects both frozen and excessively fast WDI toggles; RESET pulses enforce firmware recovery. Use Value: Prevents silent hangs from corrupted firmware loops; tWD1/tWD2 ratio selection (via WDS0/WDS1) tailors fault detection to modem protocol timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO with supervisory functions applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6791TPSD1+ | Same pinout, identical specs, but lacks windowed watchdog - only supports standard single-threshold watchdog | Suitable for simpler MCU supervision where fast/slow fault discrimination is unnecessary | Select MAX6791TPSD1+ only if windowed watchdog is not required and cost minimization is critical |
| TLV70733PDPWR | Single 3.3V output, 200mA, 25μA IQ, no watchdog or RESET - lacks dual output, supervision, and high-voltage capability | Applicable only to low-voltage, non-automotive, non-supervised applications (e.g., portable IoT) | Not a functional substitute; use only in new designs with relaxed voltage, supervision, and output count requirements |
Compared with MAX6791TPSD1+, the MAX6792TPSD1+ adds windowed watchdog fault discrimination without changing pinout or power specs; compared with TLV70733PDPWR, it delivers full automotive-grade dual-rail supervision at higher voltage and current - making it irreplaceable in AEC-Q100-compliant systems.
Availability
MAX6792TPSD1+ is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera systems, and telematics control units requiring stable component supply across extended temperature and high-reliability automotive qualification.
Supply support for MAX6792TPSD1+ 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 management with integrated supervision, delivering ultra-low IQ, wide VIN, and AEC-Q100–qualified operation for under-hood and chassis-mounted electronics.
FAQ
What output voltage options does the MAX6792TPSD1+ support?
The MAX6792TPSD1+ provides dual fixed 5V outputs (OUT1 and OUT2) as indicated by the "S" in the ordering code. OUT1 is configurable via SET1: grounding SET1 selects the preset 5V; connecting an external resistive divider enables adjustment from 1.8V to 11V. OUT2 is fixed at 5V and cannot be adjusted. The device does not support 3.3V, 2.5V, or 1.8V preset outputs in this variant.
How does the windowed watchdog function in the MAX6792TPSD1+ differ from standard watchdog timers?
The MAX6792TPSD1+ implements a windowed watchdog that monitors WDI for transitions within two time boundaries: tWD1 (fast fault) and tWD2 (slow fault). If WDI remains static longer than tWD2 or toggles faster than tWD1, RESET asserts for the CSRT-defined timeout. This prevents false resets from noise or clock glitches while detecting both frozen and runaway firmware - a capability absent in the MAX6791TPSD1+ and most standard watchdog ICs.
What is the purpose of the HOLD pin on the MAX6792TPSD1+ and how is it used in automotive systems?
The HOLD pin on the MAX6792TPSD1+ is an active-low input that forces OUT1 to remain ON even after ENABLE1 is deasserted. In automotive ignition systems, HOLD is driven low by the MCU or ignition signal during startup, enabling a self-holding power circuit without external components. Releasing HOLD (pulling high or disconnecting) shuts down OUT1 - providing reliable, software-controllable power latching essential for start-stop functionality.
Does the MAX6792TPSD1+ include reverse-battery protection, and how is it implemented?
Yes, the MAX6792TPSD1+ integrates reverse-battery protection via the GATEP pin, which drives the gate of an external p-channel MOSFET. When battery polarity is reversed, the internal circuitry pulls GATEP low, turning off the pFET and blocking reverse current. This eliminates the power loss and heat generation of series Schottky diodes, supporting efficient 12V/24V automotive systems without additional protection components.
What reset timeout period is configured by the "D3" suffix in MAX6792TPSD1+?
The "D3" in MAX6792TPSD1+ specifies a factory-configured 50ms reset timeout period. This value is achieved by internally connecting CSRT to OUT1; for user-adjustable timeout, a capacitor is connected from CSRT to GND, scaling the timeout from 35μs to 260ms based on capacitance. The D3 setting ensures compatibility with common MCU reset timing requirements without external components.
MAX6792TPSD1+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.888V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 2.187ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6792TPSD1+ FAQ
1.How can I place an order for MAX6792TPSD1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6792TPSD1+ 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 MAX6792TPSD1+ reliable?
The price and inventory of MAX6792TPSD1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6792TPSD1+ is usually 5 days.
3.What payment methods are accepted for MAX6792TPSD1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6792TPSD1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6792TPSD1+?
MAX6792TPSD1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6792TPSD1+ 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 MAX6792TPSD1+?
For technical support, including MAX6792TPSD1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6792TPSD1+ requirements.
6.How does Aetrix verify that MAX6792TPSD1+ is sourced from the original manufacturer or authorized distributors?
All MAX6792TPSD1+ 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 MAX6792TPSD1+ meets industry standards.
7.What is the process for return or replacement of MAX6792TPSD1+?
All MAX6792TPSD1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6792TPSD1+, 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 MAX6792TPSD1+ part is unused and in its original packaging.
Return procedure for MAX6792TPSD1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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