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Analog Devices Inc./Maxim Integrated MAX6793TPYD2+T
- Part No.:
- MAX6793TPYD2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6793TPYD2+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,506
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Product details
Overview
MAX6793TPYD2+T from Maxim Integrated is a dual-output, high-voltage linear regulator with integrated supervisory functions, designed for automotive systems. It delivers up to 150mA per output across a 5V–72V input range, features 68μA quiescent current, fixed 5V/3.3V outputs (with Y = 3.3V), and a 12.5ms reset timeout (D2). It supports load-dump resilience in engine-control units and body electronics.
For engineers reviewing the MAX6793TPYD2+T datasheet, MAX6793TPYD2+T pinout, MAX6793TPYD2+T application, or MAX6793TPYD2+T equivalent, key selection criteria include dual-rail voltage supervision, HOLD-enabled self-holding circuitry, adjustable watchdog windowing, thermal protection at +125°C, and AEC-Q100-compliant operation in TQFN-20 EP packaging.
Technical Context
The MAX6793TPYD2+T implements two independent LDO regulators: OUT1 (adjustable or preset 3.3V) and fixed 5V OUT2, each with dedicated ENABLE inputs (ENABLE1/ENABLE2) and shared RESET, WDI, and CSRT/CSWT timing control. Its supervisory block integrates a power-fail comparator (PFI/PFO), windowed watchdog timer (WDS0/WDS1 selectable), and capacitor-adjustable reset timeout.
It uses internal 1.231V reference for PFI threshold and 124mV/62mV SET1 thresholds for dual-mode feedback. The HOLD input enables latch-up behavior without external components, while GATEP drives an external pFET for reverse-battery protection - critical for 12V/24V automotive battery interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients up to +80V absolute max. |
| Quiescent Current | 68μA typical - enables always-on functionality in low-power vehicle modules. |
| Output Current | 150mA per output - supports dual-rail MCU + CAN transceiver or sensor cluster. |
| Output Voltages | OUT1 = 3.3V (preset, Y option), OUT2 = 5V fixed - powers mixed-signal SoCs and legacy peripherals. |
| Reset Timeout | 12.5ms (D2 code) - ensures reliable µP initialization after brownout recovery. |
| Watchdog Type | Windowed (MAX6793) - detects both stuck-high and stuck-low WDI faults via WDS0/WDS1 ratio selection. |
| Operating Temp | −40°C to +125°C - fully specified for under-hood automotive environments. |
Pinout & Package
Package: 20-pin thermally enhanced TQFN-EP (5mm × 5mm), exposed pad soldered to PCB ground plane for 2.7W power dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | OUT1 | Main regulated output (3.3V preset); requires ≥10μF ceramic capacitor to GND for stability. |
| 3 | SET1 | Feedback node for OUT1 - grounded for 3.3V preset, connected to resistive divider for adjustable output. |
| 4 | PFO | Open-drain power-fail alert - asserts low when PFI falls below 1.231V (e.g., battery sag detection). |
| 5 | CSWT | Watchdog timeout adjust - tied to OUT1 for fixed 280ms timeout or capacitor-grounded for scaling. |
| 6 | CSRT | Reset timeout adjust - tied to OUT1 for fixed 12.5ms (D2) or capacitor-grounded for custom delay. |
| 7 | GND | Analog/digital ground reference - must connect to low-impedance PCB plane. |
| 8 | RESET | Active-low push-pull reset output - directly drives µP reset pin without pull-up resistor. |
| 9,10 | WDS1, WDS0 | Watchdog window ratio select - sets fast/slow fault thresholds (e.g., WDS1=H/WDS0=L = disable). |
| 11 | WDI | Watchdog input - requires edge transition within tWD to prevent reset assertion. |
| 12 | HOLD | Active-low latch enable - forces OUT1 ON even after ENABLE1 goes low; internal 2µA pullup to OUT1. |
| 13,14 | OUT2 | Fixed 5V output - supplies legacy analog ICs or optocouplers; requires ≥10μF capacitor. |
| 15 | ENABLE2 | Active-high enable for OUT2 - internal 0.5µA pulldown allows direct microcontroller GPIO control. |
| 16 | PFI | Power-fail comparator input - set via resistor divider to detect battery voltage drop before system shutdown. |
| 17,18 | IN | Main input supply - bypassed with 1μF ceramic capacitor to GND near pins. |
| 19 | GATEP | pFET gate driver - controls external high-side p-channel MOSFET for reverse-polarity protection. |
| 20 | ENABLE1 | Active-high enable for OUT1 - internal 0.5µA pulldown enables simple ignition-switch interface. |
| EP | Exposed Pad | Thermal & electrical ground - must be soldered to PCB ground plane for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | OUT1 (3.3V preset) + OUT2 (5V fixed) - eliminates need for second discrete LDO in ECU designs. |
| HOLD-enabled self-holding | Enables ignition-controlled latching without external MOSFET or logic - reduces BOM count and layout area. |
| Windowed watchdog timer | Detects both slow (tWDI > tWD2) and fast (tWDI < tWD1) WDI faults - improves functional safety over standard timeout-only watchdogs. |
| Reverse-battery protection drive | GATEP output drives external pFET - replaces lossy series diode, enabling >99% efficiency at 150mA loads. |
| Integrated power-fail comparator | PFI/PFO pair with 1.231V precision threshold - provides early warning of battery depletion for graceful firmware shutdown. |
| AEC-Q100 qualified | Qualified per AEC-Q100 Rev H Grade 0 (−40°C to +125°C) - meets automotive reliability requirements out-of-box. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU core (3.3V) and CAN transceiver (5V) from 12V battery with load-dump immunity. IC Role / Device Role / Timing Role: Dual-output LDO + reset supervisor - provides synchronized power sequencing and brownout reset during cranking. Use Value: 68μA quiescent current extends battery life in sleep mode; HOLD input enables ignition-triggered latching without external circuitry. | Use Scenario: Supplies door module microcontroller and LIN transceiver in 24V commercial vehicle systems. IC Role / Device Role / Timing Role: High-input-voltage regulator with PFI monitoring - detects battery sag before undervoltage lockout triggers. Use Value: 72V input range accommodates 24V systems with transient spikes; PFO alerts firmware to initiate safe shutdown prior to power loss. |
| Advanced Driver Assistance Systems (ADAS) | Infotainment Power Management |
Use Scenario: Powers radar sensor SoC requiring clean 3.3V rail and fail-safe reset signaling. IC Role / Device Role / Timing Role: Windowed watchdog supervisor - distinguishes between valid WDI pulses and stuck-line faults in ASIL-B subsystems. Use Value: WDS0/WDS1 programmability enables fault discrimination per ISO 26262 diagnostic coverage requirements. | Use Scenario: Regulates display backlight controller and audio codec in head-unit with thermal constraints. IC Role / Device Role / Timing Role: Thermally enhanced TQFN regulator - dissipates 2.7W continuously at +85°C ambient without derating. Use Value: Exposed pad + 5mm×5mm footprint enables compact layout in space-constrained infotainment enclosures. |
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 |
|---|---|---|---|
| MAX6794TPYD2+T | Dual-output variant with identical pinout, 3.3V/5V outputs, and same D2 reset timeout - differs only in watchdog architecture (non-windowed). | Lacks windowed watchdog; suitable where only basic timeout supervision is required. | Select MAX6794TPYD2+T if functional safety requirements do not mandate fast/slow fault discrimination. |
| TLV70733PDQNR | Single-output 3.3V LDO (150mA), 2.5V–5.5V input, no supervision - lacks RESET, WDI, PFI, HOLD, or GATEP. | No supervisory features; cannot replace MAX6793TPYD2+T in safety-critical or battery-monitoring roles. | Use only as auxiliary 3.3V rail where primary regulation and supervision are handled elsewhere. |
Compared with MAX6794TPYD2+T, the MAX6793TPYD2+T adds windowed watchdog capability for enhanced fault coverage; compared with TLV70733PDQNR, it provides full automotive-grade supervision, reverse-battery protection, and dual-rail integration - eliminating four discrete components.
Availability
MAX6793TPYD2+T is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, ADAS sensors, and infotainment systems requiring stable component supply across extended temperature and high-reliability operating conditions.
Supply support for MAX6793TPYD2+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 automotive, industrial, and communications markets.
The MAX6791–MAX6796 product line targets high-voltage automotive power systems, integrating ultra-low-quiescent LDO regulation with comprehensive supervision - reducing system-level complexity in ECU, BCM, and ADAS applications.
FAQ
What output voltages does the MAX6793TPYD2+T provide?
The MAX6793TPYD2+T provides two regulated outputs: OUT1 is preset to 3.3V (denoted by 'Y' in the part number), and OUT2 is a fixed 5V output. Both outputs support up to 150mA load current. OUT1 can also be adjusted from 1.8V to 11V using an external resistive divider connected to the SET1 pin - though the MAX6793TPYD2+T is configured for the 3.3V preset option.
How does the HOLD function work on the MAX6793TPYD2+T?
The HOLD input on the MAX6793TPYD2+T is an active-low signal that enables self-holding behavior: once ENABLE1 turns ON the regulator, pulling HOLD low maintains OUT1 operation even if ENABLE1 subsequently goes low. Releasing HOLD (letting it float or pulling high) shuts down OUT1. Internally, HOLD is pulled up to OUT1 with a 2µA current source - so connecting HOLD to OUT1 achieves automatic latching without external components.
What is the purpose of the GATEP pin on the MAX6793TPYD2+T?
The GATEP pin on the MAX6793TPYD2+T drives the gate of an external p-channel MOSFET to implement reverse-battery protection. When battery polarity is reversed, the device disables the pFET, blocking current flow and protecting downstream circuitry. This eliminates the power loss and heat generation associated with traditional series diodes - improving efficiency and thermal performance in automotive 12V/24V systems.
Does the MAX6793TPYD2+T support adjustable watchdog timeout periods?
Yes, the MAX6793TPYD2+T supports both fixed and adjustable watchdog timeout periods. By default, CSWT tied to OUT1 configures a fixed minimum timeout of 280ms. For adjustable timing, connect a capacitor from CSWT to GND - the timeout scales linearly with capacitance (e.g., 1500pF yields ~236ms). The device also supports fast watchdog modes (tWD1) and windowed operation via WDS0/WDS1 configuration.
Is the MAX6793TPYD2+T qualified for automotive use?
Yes, the MAX6793TPYD2+T is AEC-Q100 qualified (Grade 0, −40°C to +125°C) and designed specifically for automotive applications. It meets stringent requirements for load-dump immunity (72V operating, +80V absolute max), thermal robustness, and long-term reliability in under-hood and cabin environments - making it suitable for ECUs, BCMS, and ADAS modules.
MAX6793TPYD2+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:
- 2.188V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 8.75ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6793TPYD2+T FAQ
1.How can I place an order for MAX6793TPYD2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6793TPYD2+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 MAX6793TPYD2+T reliable?
The price and inventory of MAX6793TPYD2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6793TPYD2+T is usually 5 days.
3.What payment methods are accepted for MAX6793TPYD2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6793TPYD2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6793TPYD2+T?
MAX6793TPYD2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6793TPYD2+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 MAX6793TPYD2+T?
For technical support, including MAX6793TPYD2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6793TPYD2+T requirements.
6.How does Aetrix verify that MAX6793TPYD2+T is sourced from the original manufacturer or authorized distributors?
All MAX6793TPYD2+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 MAX6793TPYD2+T meets industry standards.
7.What is the process for return or replacement of MAX6793TPYD2+T?
All MAX6793TPYD2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6793TPYD2+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 MAX6793TPYD2+T part is unused and in its original packaging.
Return procedure for MAX6793TPYD2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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