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Analog Devices Inc./Maxim Integrated MAX17573ATG+T
- Part No.:
- MAX17573ATG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
MAX17573ATG+T.pdf
- Description:
- IC REG BUCK ADJ 3.5A 24TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,488
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Product details
Overview
MAX17573ATG+T from Analog Devices is a 4.5V to 60V input, 3.5A synchronous step-down DC-DC converter with integrated high- and low-side MOSFETs, internal loop compensation, and adjustable switching frequency from 100kHz to 2.2MHz. It delivers peak efficiency of 95.4% at 12VIN/5VOUT, supports prebiased startup, and includes built-in hiccup-mode overload protection and RESET output for power-good monitoring in industrial power rails.
For engineers reviewing the MAX17573ATG+T datasheet, MAX17573ATG+T pinout, MAX17573ATG+T application, or MAX17573ATG+T equivalent, key selection criteria include its wide input range (4.5–60V), internal compensation eliminating external compensation components, EXTVCC auxiliary supply for improved high-VIN efficiency, programmable EN/UVLO threshold, and robust thermal and overcurrent protection for harsh environments.
Technical Context
The MAX17573ATG+T implements peak-current-mode control with an integrated transconductance error amplifier and slope compensation, enabling stable regulation across wide input/output conditions. Its architecture integrates dual LDOs (IN-LDO and EXT-LDO) with automatic switchover based on EXTVCC voltage, reducing quiescent current and improving efficiency above 4.7V on EXTVCC.
Three selectable operating modes-PWM (constant frequency), PFM (pulse-skipping), and DCM (discontinuous conduction)-are configured via the MODE/SYNC pin at power-up. The device supports external clock synchronization within ±10% of the RT-set frequency and features monotonic soft-start, programmable current limits (5.2–7.0A peak), and precise feedback regulation (±0.9% over –40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - Enables direct connection to unregulated industrial or automotive battery rails without pre-regulation. |
| Output Current | 3.5A continuous - Sufficient for powering FPGA I/O banks, microcontroller cores, or industrial PLC logic rails. |
| Switching Frequency | 100kHz to 2.2MHz - Adjustable via RT resistor or external sync clock; allows optimization of size (higher fSW) vs. EMI (lower fSW). |
| Feedback Accuracy | ±0.9% over –40°C to +125°C - Ensures tight output regulation in extended-temperature industrial applications. |
| Peak Efficiency | 95.4% at 12VIN/5VOUT/500kHz - Minimizes thermal stress and enables compact PCB layout with all-ceramic capacitors. |
| Shutdown Current | 2.8μA - Supports ultra-low-power system standby states without external enable circuitry. |
| Operating Temp | –40°C to +125°C ambient - Qualified for factory automation, mobile PLC, and under-hood automotive environments. |
Pinout & Package
Package: 24-pin TQFN-EP (4mm × 5mm, exposed pad), RoHS-compliant, thermal resistance θJA = 24°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (Pins 1, 23, 24) | Switching node | Connects directly to inductor; carries high di/dt current; requires low-inductance routing and Kelvin connection to PGND. |
| PGND (Pins 2, 3, 11) | Power ground | High-current return path for LX and IN; must be tied to SGND only at VCC bypass capacitor location to avoid noise coupling. |
| IN (Pins 5–7, 9) | Main power input | Parallel pins reduce trace resistance and inductance; require local 4.7μF ceramic decoupling per pair near PGND. |
| EN/UVLO (Pin 10) | Enable & input UVLO | Configurable turn-on threshold (1.19–1.26V rising); enables controlled power sequencing or brownout protection. |
| MODE/SYNC (Pin 15) | Mode select & sync input | Defines PWM/DCM/PFM operation at power-up; accepts external clock (1.1–1.4× fSW) for EMI reduction or multi-rail synchronization. |
| FB (Pin 18) | Feedback input | Regulates output via resistor divider; 0.9V nominal reference enables precise VOUT setting from 0.9V to 90% of VIN. |
| RESET (Pin 14) | Open-drain power-good | Asserts low if VOUT drops below 92% of setpoint; deasserts after 1024 cycles once VOUT rises above 95% - provides glitch-free system reset timing. |
| EXTVCC (Pin 20) | Auxiliary LDO supply | Accepts 4.84–24V to bypass internal IN-LDO; reduces power dissipation and improves efficiency at high VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Internal loop compensation | Eliminates external Type-II/III compensation network - reduces BOM count, layout area, and tuning effort. |
| All-ceramic capacitor support | Enables compact, low-profile designs without electrolytic or tantalum capacitors - improves reliability and temperature stability. |
| Programmable soft-start | Capacitor-controlled ramp time prevents input inrush current and output overshoot during power-up. |
| Built-in hiccup-mode OCP | Auto-retry current limiting during short-circuit or overload - protects MOSFETs and maintains system uptime without latch-off. |
| Adjustable EN/UVLO threshold | Resistor-divider configuration allows precise turn-on voltage matching to system battery or rail requirements. |
| Prebiased output startup | Supports monotonic rise even when output is precharged - essential for hot-swap and multi-rail sequencing applications. |
Applications
| Factory Automation Power Rail | Aftermarket Automotive Mobile PLC |
|---|---|
Use Scenario: Powering I/O modules, sensor interfaces, and communication gateways in programmable logic controllers operating in dusty, vibration-prone environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary 5V/3.3V point-of-load regulator delivering clean, regulated power with hiccup-mode fault recovery and RESET signaling for controller watchdogs. Use Value: 95.4% peak efficiency and –40°C to +125°C operation minimize thermal derating and eliminate need for heatsinks or forced air cooling in sealed enclosures. | Use Scenario: Supplying core logic and CAN transceivers in compact aftermarket vehicle telematics units subjected to load dump transients up to 60V. IC Role / Device Role / Timing Role: High-input-voltage buck converter with integrated FETs and EXTVCC support, providing robust, self-contained regulation without external driver or protection ICs. Use Value: 60V absolute maximum input rating and built-in overvoltage/overtemperature protection enable direct connection to automotive battery without external TVS or regulators. |
| Industrial IoT Edge Node | Ruggedized HMI Display Power |
Use Scenario: Powering ARM Cortex-M7 microcontrollers, Wi-Fi/BLE radios, and analog front-ends in battery-backed or energy-harvested edge sensors deployed outdoors. IC Role / Device Role / Timing Role: Efficient, low-quiescent-power DC-DC converter supporting PFM mode for <61μA no-load IQ and soft-start for clean wake-up from deep sleep. Use Value: 2.8μA shutdown current and programmable UVLO extend battery life while ensuring reliable startup across varying battery charge states. | Use Scenario: Generating stable 3.3V and 5V rails for touch controllers, display drivers, and backlight LEDs in industrial human-machine interface panels exposed to ESD and conducted noise. IC Role / Device Role / Timing Role: Synchronous buck regulator with RESET output and FB monitoring, enabling system-level power sequencing and fault detection for display subsystems. Use Value: Integrated RESET with 92–95% VOUT trip thresholds and 1024-cycle delay ensures glitch-free display initialization and avoids false resets during transient load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17574ATG+T | Pin-to-pin compatible but lower peak efficiency (94.7% vs. 95.4% at 12V/5V); higher RDS(on) (110mΩ HS / 70mΩ LS vs. 90/55mΩ). | Suitable where footprint compatibility is critical but marginal efficiency gain is acceptable; lacks EXTVCC option for auxiliary LDO bypass. | Select MAX17574ATG+T only when legacy design reuse or stock availability outweighs efficiency and thermal advantages of MAX17573ATG+T. |
| LM5164QPWPRQ1 | Automotive-grade (AEC-Q100), 3.5A, 4.5–65V, but requires external compensation and lacks integrated RESET or EXTVCC. | Preferred for automotive production programs requiring qualification; less suitable for space-constrained industrial designs due to added compensation components. | Choose LM5164QPWPRQ1 when AEC-Q100 compliance is mandatory and board area permits external compensation network. |
Compared with MAX17574ATG+T, the MAX17573ATG+T delivers superior light-load efficiency via optimized PFM/DCM modes and lower conduction losses, while its EXTVCC capability enables >2% efficiency gain at high input voltages - making it preferable for thermally constrained or high-VIN industrial applications.
Availability
MAX17573ATG+T is available at Aetrix Electronics and suitable for factory automation power rails, aftermarket automotive mobile PLCs, and ruggedized HMI display power systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX17573ATG+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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX17573ATG+T belongs to Analog Devices' high-voltage synchronous buck converter product line, designed specifically for robust, efficient point-of-load conversion in harsh industrial and transportation environments where wide input range, thermal resilience, and integrated protection are critical.
FAQ
What is the absolute maximum input voltage rating for the MAX17573ATG+T?
The MAX17573ATG+T has an absolute maximum input voltage rating of +65V on the IN pin relative to PGND, as specified in the Absolute Maximum Ratings table. Its operational input range is 4.5V to 60V, meaning sustained operation above 60V is not guaranteed and may trigger overvoltage protection or cause permanent damage. For load dump scenarios in automotive applications, the 60V operating limit aligns with ISO 7637-2 Pulse 5a requirements when combined with appropriate front-end clamping.
Does the MAX17573ATG+T support external clock synchronization, and what are the valid frequency ranges?
Yes, the MAX17573ATG+T supports external clock synchronization via the MODE/SYNC pin. The external clock frequency must fall within 1.1× to 1.4× the RT-resistor–set switching frequency (e.g., 550–700kHz for a 500kHz base). The device detects 16 consecutive edges before locking, and minimum pulse width must exceed 50ns. During synchronization, the MAX17573ATG+T operates exclusively in PWM mode regardless of initial MODE/SYNC configuration.
How does the EXTVCC pin improve efficiency in the MAX17573ATG+T?
The EXTVCC pin on the MAX17573ATG+T allows bypassing the internal IN-LDO by supplying 4.84–24V directly to power the VCC rail. This reduces power dissipation in the LDO stage - especially beneficial at high input voltages (e.g., 48V), where IN-LDO dropout losses would otherwise dominate. When EXTVCC is active, the MAX17573ATG+T achieves up to 2% higher system efficiency compared to IN-LDO–only operation, as confirmed in typical operating characteristics data.
Can the MAX17573ATG+T start up into a prebiased output, and how is this enabled?
Yes, the MAX17573ATG+T supports monotonic startup into a prebiased output. This is enabled by default - no external components are required. The IC monitors the FB voltage during soft-start and adjusts gate drive to prevent reverse current flow through the low-side MOSFET. This feature ensures safe power sequencing in systems where downstream rails may retain residual voltage, such as in hot-swap or multi-rail FPGA applications using the MAX17573ATG+T.
What protection features are integrated into the MAX17573ATG+T?
The MAX17573ATG+T integrates multiple protection features: hiccup-mode overcurrent protection (5.2–7.0A peak limit), thermal shutdown at +165°C with 10°C hysteresis, output-voltage monitoring with open-drain RESET assertion below 92% of regulation, programmable EN/UVLO, and built-in overvoltage protection on EXTVCC and BST pins. These features collectively ensure robust operation in adverse industrial environments without requiring external protection circuitry.
MAX17573ATG+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 54V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 500kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TQFN (4x5)
MAX17573ATG+T FAQ
1.How can I place an order for MAX17573ATG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17573ATG+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 MAX17573ATG+T reliable?
The price and inventory of MAX17573ATG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17573ATG+T is usually 5 days.
3.What payment methods are accepted for MAX17573ATG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17573ATG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17573ATG+T?
MAX17573ATG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17573ATG+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 MAX17573ATG+T?
For technical support, including MAX17573ATG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17573ATG+T requirements.
6.How does Aetrix verify that MAX17573ATG+T is sourced from the original manufacturer or authorized distributors?
All MAX17573ATG+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 MAX17573ATG+T meets industry standards.
7.What is the process for return or replacement of MAX17573ATG+T?
All MAX17573ATG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17573ATG+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 MAX17573ATG+T part is unused and in its original packaging.
Return procedure for MAX17573ATG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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