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Analog Devices Inc./Maxim Integrated MAX6793TPSD0+
- Part No.:
- MAX6793TPSD0+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPSD0+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,128
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Product details
Overview
MAX6793TPSD0+ 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 active-low open-drain RESET with 50ms fixed timeout - ideal for engine control units under load-dump conditions.
For engineers reviewing the MAX6793TPSD0+ datasheet, MAX6793TPSD0+ pinout, MAX6793TPSD0+ application, or MAX6793TPSD0+ equivalent, key selection considerations include its dual-regulator architecture, 5V/3.3V preset output option (confirmed as 3.3V by "S" in suffix), HOLD-enabled self-holding circuitry, watchdog disable capability via WD-DIS, and AEC-Q100-compliant thermal performance up to +125°C.
Technical Context
The MAX6793TPSD0+ implements two independent LDO regulators: OUT1 is adjustable or preset (3.3V per "S" suffix), while OUT2 is fixed at 5V. Its supervisory block integrates a reset generator with 87.5% reset threshold (per "D0" suffix) and fixed 50ms timeout, plus a watchdog timer with externally adjustable timeout via CSWT and disable control via WD-DIS pin.
It supports reverse-battery protection via GATEP-driven pFET, includes PFI/PFO for programmable power-fail detection (1.231V internal reference), and uses dual enable logic (ENABLE1/ENABLE2) with HOLD for ignition-controlled latching - all specified across –40°C to +125°C with thermal shutdown at +165°C.
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 MCU core + peripheral rail in compact ECUs |
| Reset Threshold | 87.5% of OUT1 nominal (3.3V → 2.888V min) - ensures reliable brownout detection before MCU malfunction |
| Reset Timeout | 50ms fixed (D0 suffix) - provides adequate deassertion hold time for deterministic microcontroller boot |
| Dropout Voltage | 840mV typ at 100mA (dual mode) - maintains regulation down to VIN = 4.14V when VOUT1 = 3.3V |
| Operating Temp | –40°C to +125°C - fully qualified for under-hood automotive environments |
Pinout & Package
MAX6793TPSD0+ is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND for optimal heat dissipation (2.7W max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Main adjustable/preset regulator output (3.3V); requires ≥10μF ceramic capacitor to GND for stability |
| 3 | SET1 | Feedback node - tied to GND for 3.3V preset (S suffix), or used with resistor divider for adjustable output |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI falls below 1.231V, enabling early shutdown signaling |
| 5 | CSWT | Watchdog timeout adjust - connect to OUT1 for fixed 280ms timeout or to capacitor for user-defined period |
| 6 | CSRT | Reset timeout adjust - connected to OUT1 for fixed 50ms timeout (D0 suffix) |
| 7 | GND | Analog/digital ground reference - must be low-impedance connection to PCB ground plane |
| 8 | RESET | Active-low open-drain reset output - drives µP reset pin; asserts during OUT1 undervoltage or watchdog fault |
| 9,10 | WDS1, WDS0 | Windowed watchdog select - unused on MAX6793 (not MAX6791/6792); leave unconnected or tie to defined logic level |
| 11 | WDI | Watchdog input - requires edge transition within timeout window; resets watchdog counter on valid toggle |
| 12 | HOLD | Active-low latch control - forces OUT1 ON even after ENABLE1 goes low, enabling ignition-key hold functionality |
| 13,14 | OUT2 | Fixed 5V secondary output - supplies CAN transceivers or sensors; requires ≥10μF capacitor to GND |
| 15 | ENABLE2 | Active-high enable for OUT2 - independently controls 5V rail; pulled down internally (0.5μA sink) |
| 16 | PFI | Power-fail comparator input - set threshold via resistor divider to monitor battery or pre-regulated supply |
| 17,18 | IN | Main input supply - bypass with 1μF ceramic capacitor to GND near pins for transient immunity |
| 19 | GATEP | pFET gate driver - drives external p-channel MOSFET for reverse-battery protection (no diode drop) |
| 20 | ENABLE1 | Active-high enable for OUT1 - controls main 3.3V rail; pulled down internally (0.5μA sink) |
| EP | Exposed Pad | Thermal & electrical GND - must be soldered to solid ground plane for thermal performance and noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | 3.3V adjustable/preset OUT1 + fixed 5V OUT2 - powers mixed-voltage domains (MCU core + I/O) from single high-voltage source |
| HOLD-enabled self-holding | Eliminates need for external latch circuitry - simplifies ignition-controlled power sequencing in automotive body controllers |
| WD-DIS watchdog disable | Hardware-disable pin allows full watchdog bypass without firmware changes - critical for debug or safety-critical fail-safe modes |
| Reverse-battery protection via GATEP | Drives external pFET to block –12V/–24V faults - replaces lossy series diode, improving efficiency and thermal margin |
| AEC-Q100 qualified operation | Validated for automotive temperature range (–40°C to +125°C) and reliability - meets OEM requirements for under-hood deployment |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Powers 3.3V MCU core and 5V image sensor interface in gasoline/diesel engine control units exposed to 72V load-dump transients. IC Role / Device Role / Timing Role: Dual LDO regulator + supervisor - provides stable, sequenced, and monitored power rails with reset assertion during brownout. Use Value: 68μA quiescent current extends battery life in stop-start systems; HOLD function enables ignition-key latching without external components. | Use Scenario: Supplies 3.3V ISP processor and 5V CMOS image sensor in rear-view or surround-view camera modules mounted near vehicle exterior. IC Role / Device Role / Timing Role: High-voltage dual regulator with watchdog - ensures reliable boot and runtime supervision under wide ambient temperature swings. Use Value: GATEP-driven reverse-battery protection eliminates diode voltage drop, preserving headroom for low-VIN operation during cold cranking. |
| Body Control Module (BCM) | Automotive Infotainment Power Sequencer |
Use Scenario: Delivers 3.3V logic power and 5V USB/HVAC actuator interface in centralized body electronics managing door locks, lighting, and climate. IC Role / Device Role / Timing Role: Supervisory dual LDO - coordinates power-up timing, monitors supply integrity, and asserts reset on undervoltage or watchdog timeout. Use Value: PFI/PFO comparator enables programmable battery voltage monitoring for graceful shutdown before deep discharge. | Use Scenario: Generates primary 3.3V rail and auxiliary 5V rail for infotainment head unit processors, display drivers, and audio codecs in 12V/24V vehicles. IC Role / Device Role / Timing Role: Dual-output regulator with RESET and watchdog - manages complex power sequencing and prevents software lockup during voltage instability. Use Value: 50ms fixed reset timeout (D0) ensures consistent boot timing across temperature; WD-DIS pin allows safe disable during firmware updates. |
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 |
|---|---|---|---|
| MAX6794TPSD0+ | Same pinout, identical electrical specs, but includes windowed watchdog (WDS0/WDS1 pins active) | Required where min/max watchdog windowing is mandated for ASIL-B/C diagnostics | Select MAX6794TPSD0+ only if windowed watchdog functionality is needed; MAX6793TPSD0+ is simpler and lower-cost for standard timeout use |
| TLV70733PDQNR | Single 3.3V output, 200mA, 5.5V max input, no watchdog or RESET - lacks high-voltage capability and supervisory features | Suitable only for low-voltage post-regulation (e.g., after DC-DC converter), not direct battery-fed applications | Use TLV70733PDQNR only in non-automotive, low-input-voltage designs where supervisory functions are handled elsewhere |
Compared with MAX6794TPSD0+, the MAX6793TPSD0+ omits windowed watchdog logic - reducing complexity and cost while retaining full reset, enable, HOLD, and reverse-protection functionality essential for most automotive ECU designs.
Availability
MAX6793TPSD0+ is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, body control modules, and infotainment power sequencers requiring stable component supply under harsh automotive conditions.
Supply support for MAX6793TPSD0+ 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 automotive, industrial, and communications markets.
The MAX6793TPSD0+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators - engineered specifically for automotive power-supply supervision, featuring integrated reset, watchdog, reverse-battery protection, and wide-temperature operation.
FAQ
What output voltage does MAX6793TPSD0+ deliver on OUT1?
The MAX6793TPSD0+ delivers a preset 3.3V on OUT1, confirmed by the "S" in its part number suffix per Maxim's ordering guide. SET1 must be tied to GND to activate this preset; connecting an external resistor divider enables adjustable output from 1.8V to 11V. OUT2 is fixed at 5V regardless of configuration.
Does MAX6793TPSD0+ support watchdog disable functionality?
Yes, MAX6793TPSD0+ supports hardware watchdog disable via the WD-DIS pin (Pin 9). Driving WD-DIS low disables the watchdog timer entirely, preventing unintended reset assertions - a critical feature for debug, safety validation, or firmware update modes where watchdog toggling is impractical.
What is the reset timeout period for MAX6793TPSD0+ and how is it set?
The MAX6793TPSD0+ has a fixed 50ms reset timeout period, indicated by the "D0" suffix. This is implemented by connecting CSRT (Pin 6) to OUT1 - no external capacitor is required. The timeout begins when OUT1 rises above its 87.5% reset threshold and holds RESET low for exactly 50ms before deassertion.
How does the HOLD function operate on MAX6793TPSD0+?
On MAX6793TPSD0+, the HOLD pin (Pin 12) is active-low. When driven low after ENABLE1 is asserted, it latches OUT1 ON - maintaining regulation even if ENABLE1 later goes low. Releasing HOLD (pulling high or disconnecting) shuts down OUT1. This enables ignition-key controlled self-holding without external components.
Is MAX6793TPSD0+ qualified for automotive applications?
Yes, MAX6793TPSD0+ is AEC-Q100 qualified and specified for –40°C to +125°C operation. Its 5V–72V input range, load-dump tolerance, thermal shutdown at +165°C, and robust supervisory features meet stringent automotive reliability and environmental requirements for under-hood and cabin-deployed ECUs.
MAX6793TPSD0+ 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:
- 2
- Voltage - Threshold:
- 2.888V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35µs Typical
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPSD0+ FAQ
1.How can I place an order for MAX6793TPSD0+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPSD0+ 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 MAX6793TPSD0+ reliable?
The price and inventory of MAX6793TPSD0+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPSD0+ is usually 5 days.
3.What payment methods are accepted for MAX6793TPSD0+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPSD0+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPSD0+?
MAX6793TPSD0+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPSD0+ 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 MAX6793TPSD0+?
For technical support, including MAX6793TPSD0+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPSD0+ requirements.
6.How does Aetrix verify that MAX6793TPSD0+ is sourced from the original manufacturer or authorized distributors?
All MAX6793TPSD0+ 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 MAX6793TPSD0+ meets industry standards.
7.What is the process for return or replacement of MAX6793TPSD0+?
All MAX6793TPSD0+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPSD0+, 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 MAX6793TPSD0+ part is unused and in its original packaging.
Return procedure for MAX6793TPSD0+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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