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Analog Devices Inc./Maxim Integrated MAX6793TPTD4+
- Part No.:
- MAX6793TPTD4+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPTD4+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,490
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Product details
Overview
MAX6793TPTD4+ 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 across a 5V–72V input range, features fixed 5V/3.3V outputs (this variant: 3.3V OUT1 + fixed 5V OUT2), 68μA quiescent current, and integrated RESET with 200ms timeout (D4 code), operating from –40°C to +125°C in automotive environments.
For engineers reviewing the MAX6793TPTD4+ datasheet, MAX6793TPTD4+ pinout, MAX6793TPTD4+ application, or MAX6793TPTD4+ equivalent, key selection criteria include dual-rail voltage supervision, HOLD-enabled self-holding circuitry, watchdog disable capability via WD-DIS, and AEC-Q100-compatibility validation for under-hood deployment.
Technical Context
The MAX6793TPTD4+ implements two independent LDO regulators: OUT1 (adjustable or preset 3.3V) and OUT2 (fixed 5V), each with dedicated ENABLE inputs (ENABLE1/ENABLE2) and shared supervisory functions. Its reset logic asserts low when either regulated output drops below 87.5% of nominal (S-code threshold), holding low for 200ms after recovery.
It integrates a fixed 280ms watchdog timeout (CSWT = OUT1) with WD-DIS pin for hardware disable, plus PFI comparator (1.231V threshold) and reverse-battery protection via GATEP-driven pFET - all within a single 20-pin TQFN-EP package rated for continuous operation at 125°C ambient.
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 systems (e.g., CAN wake-up receivers) with minimal battery drain. |
| Output Current | 150mA per output - supports dual-rail MCU + peripheral supply (e.g., 3.3V core + 5V sensor interface). |
| Reset Timeout | 200ms (D4 code) - ensures reliable microprocessor initialization after brownout recovery. |
| Operating Temp | –40°C to +125°C - fully specified for engine compartment placement per AEC-Q100 Grade 0. |
| Dropout Voltage | 840mV typ @100mA (dual) - maintains regulation during cold-crank (6.5V battery) at full load. |
| Reset Threshold | 87.5% of OUT1 nominal (S-code) - triggers reset at 2.888V for 3.3V rail, preventing unstable MCU operation. |
Pinout & Package
MAX6793TPTD4+ uses a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected to GND for optimal thermal dissipation (2.7W max). Pin count and layout match MAX6791–MAX6794 family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Main regulated output (3.3V fixed for this variant); requires ≥10μF ceramic capacitor to GND. |
| 3 | SET1 | Feedback node - grounded for preset 3.3V; used with resistor divider for adjustable outputs. |
| 4 | PFO | Open-drain power-fail output - asserts low when PFI < 1.231V, enabling early shutdown warning. |
| 5 | CSWT | Watchdog timeout adjust - tied to OUT1 for fixed 280ms timeout; capacitor to GND for adjustment. |
| 6 | CSRT | Reset timeout adjust - tied to OUT1 for fixed 200ms (D4); capacitor to GND enables user-defined delay. |
| 7 | GND | Analog/digital ground reference - connects directly to EP for thermal and noise control. |
| 8 | RESET | Active-low push-pull reset - drives µP reset pin directly; no pull-up required. |
| 9,10 | WDS1, WDS0 | Windowed watchdog select - unused in MAX6793 (not windowed); leave unconnected or tie high/low. |
| 11 | WDI | Watchdog input - toggling required every 280ms; reset asserted if timeout exceeded. |
| 12 | HOLD | Active-low hold enable - forces OUT1/OUT2 ON even after ENABLE1/ENABLE2 goes low. |
| 13,14 | OUT2 | Fixed 5V secondary output - supplies sensors, CAN transceivers, or analog circuitry. |
| 15 | ENABLE2 | Active-high enable for OUT2 - internal 0.5μA pulldown allows direct MCU GPIO control. |
| 16 | PFI | Power-fail comparator input - set threshold via resistor divider to monitor battery or pre-regulator rail. |
| 17,18 | IN | Main input supply - bypass with 1μF ceramic capacitor; accepts 5V–72V DC. |
| 19 | GATEP | pFET gate driver - controls external p-channel MOSFET for reverse-battery protection (no diode drop). |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5μA pulldown enables direct MCU control without external resistors. |
| EP | Exposed Pad | Thermal & electrical GND - must be soldered to PCB ground plane for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | ENABLE1 and ENABLE2 allow sequenced startup/shutdown of 3.3V and 5V rails without firmware coordination. |
| HOLD self-holding circuit | Eliminates need for external latch components - enables ignition-key-triggered power retention in vehicle modules. |
| WD-DIS watchdog disable | Hardware-disable pin permits deterministic watchdog deactivation during debug or safe-mode operation. |
| GATEP reverse-battery protection | Drives external pFET to block reverse polarity - achieves <50mV drop vs. >300mV for Schottky solutions. |
| Integrated PFI comparator | 1.231V precision threshold enables accurate battery voltage monitoring with simple resistor divider. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
Use Scenario: Centralized power management for door locks, lighting, and window controls in modern vehicles. IC Role / Device Role / Timing Role: Dual-output regulator supplying 3.3V to MCU and 5V to LIN transceivers and relays, with HOLD maintaining power during ignition cycling. Use Value: 68μA quiescent current prevents battery drain during extended park mode; 72V tolerance survives jump-start transients. | Use Scenario: Powering image sensor, ISP, and serializer in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Provides clean, supervised 3.3V core and 5V I/O rails; RESET ensures deterministic boot after power glitches on 12V vehicle bus. Use Value: 200ms reset timeout (D4) meets ISO 16750-2 cold-crank recovery timing; thermal protection prevents shutdown during summer cabin heat. |
| Engine Control Unit (ECU) Auxiliary Rail | Telematics Control Unit (TCU) Always-On Supply |
Use Scenario: Generating auxiliary 3.3V/5V rails for CAN FD interfaces, EEPROM, and diagnostic circuits alongside main ECU regulator. IC Role / Device Role / Timing Role: Secondary LDO with independent ENABLE2 control for 5V CAN transceivers; PFI monitors main 5V rail for fail-safe shutdown. Use Value: 87.5% reset threshold (S-code) detects marginal 3.3V rail collapse before MCU lockup; AEC-Q100 qualification ensures reliability. | Use Scenario: Maintaining low-power wake-up capability for LTE/GNSS modules during vehicle sleep states. IC Role / Device Role / Timing Role: Always-on 3.3V supply with watchdog supervision (WDI toggled by RTC) and HOLD-latched state for rapid network reconnection. Use Value: 280ms watchdog timeout aligns with cellular modem keep-alive intervals; 125°C rating supports under-dash mounting. |
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 |
|---|---|---|---|
| MAX6794TPTD4+ | Same pinout, identical specs, but includes windowed watchdog (WDS0/WDS1 pins active); D4 reset timeout unchanged. | Required where fault discrimination between fast/slow watchdog timeouts is needed (e.g., safety-critical diagnostics). | Select MAX6794TPTD4+ only if windowed watchdog functionality is explicitly required; otherwise MAX6793TPTD4+ reduces BOM cost and simplifies layout. |
| TPS7B8733QDDARQ1 | Single 3.3V output (no 5V OUT2); 150mA rating; 60μA IQ; 40V max input; no HOLD or WD-DIS pins. | Lacks dual-rail capability and self-holding circuit - unsuitable for BCMs requiring independent 3.3V/5V control. | Choose TPS7B8733QDDARQ1 only for space-constrained single-rail designs where HOLD and dual enable are unnecessary. |
Compared with MAX6794TPTD4+, the MAX6793TPTD4+ omits windowed watchdog logic to reduce complexity and cost while retaining identical dual-output regulation, RESET, and HOLD functionality; versus TPS7B8733QDDARQ1, it provides critical dual-rail flexibility and ignition-retention capability essential for body electronics.
Availability
MAX6793TPTD4+ is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera power systems, engine control unit auxiliary rails, and telematics control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6793TPTD4+ 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 high-reliability analog and mixed-signal ICs for automotive, industrial, and communications markets.
The MAX6791–MAX6796 product line targets automotive power management with integrated supervision, delivering ultra-low IQ, wide VIN, and AEC-Q100-compliant operation for under-hood and chassis-mounted ECUs.
FAQ
What output voltages does the MAX6793TPTD4+ provide?
The MAX6793TPTD4+ provides two regulated outputs: OUT1 is preset to 3.3V (S-code), and OUT2 is fixed at 5V. Both outputs support up to 150mA load current. The 3.3V output is confirmed by the 'S' in the ordering code (MAX6793TPSD4+) and matches the S-threshold reset specification (87.5% of 3.3V = 2.888V). This configuration is validated in the device selector guide and electrical characteristics tables.
How is the 200ms reset timeout implemented in MAX6793TPTD4+?
The MAX6793TPTD4+ implements a 200ms reset timeout via the D4 code, which configures CSRT (pin 6) to connect internally to OUT1. This selects the factory-trimmed 200ms timeout period - confirmed in Table 2 of the datasheet and Electrical Characteristics section (tRP, D4 row: 140–260ms). No external capacitor is required; adding one to CSRT overrides the fixed value.
Does MAX6793TPTD4+ support reverse-battery protection?
Yes, MAX6793TPTD4+ supports reverse-battery protection via the GATEP pin (pin 19), which drives the gate of an external p-channel MOSFET. When reverse polarity is applied, the internal circuitry pulls GATEP low to block current flow. This eliminates the forward-voltage drop of series diodes, preserving efficiency - verified in the Absolute Maximum Ratings and Functional Diagram sections.
Can the watchdog timer be disabled on MAX6793TPTD4+?
Yes, the watchdog timer on MAX6793TPTD4+ can be disabled using the WD-DIS pin (pin 10). Driving WD-DIS low disables watchdog monitoring entirely, allowing WDI to be left floating or tied high without triggering resets. This hardware disable function is explicitly documented in the Pin Description and Watchdog Timer sections of the datasheet.
What is the purpose of the HOLD pin on MAX6793TPTD4+?
The HOLD pin (pin 12) on MAX6793TPTD4+ enables self-holding operation: once ENABLE1 is asserted and OUT1 turns on, pulling HOLD low latches the regulator ON even if ENABLE1 later goes low. Releasing HOLD shuts down OUT1/OUT2. This eliminates external latch circuitry in ignition-switched automotive modules - confirmed in the Enable and Hold Inputs section and Table 3.
MAX6793TPTD4+ 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:
- 3.053V, 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)
MAX6793TPTD4+ FAQ
1.How can I place an order for MAX6793TPTD4+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPTD4+ 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 MAX6793TPTD4+ reliable?
The price and inventory of MAX6793TPTD4+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPTD4+ is usually 5 days.
3.What payment methods are accepted for MAX6793TPTD4+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPTD4+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPTD4+?
MAX6793TPTD4+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPTD4+ 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 MAX6793TPTD4+?
For technical support, including MAX6793TPTD4+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPTD4+ requirements.
6.How does Aetrix verify that MAX6793TPTD4+ is sourced from the original manufacturer or authorized distributors?
All MAX6793TPTD4+ 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 MAX6793TPTD4+ meets industry standards.
7.What is the process for return or replacement of MAX6793TPTD4+?
All MAX6793TPTD4+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPTD4+, 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 MAX6793TPTD4+ part is unused and in its original packaging.
Return procedure for MAX6793TPTD4+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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