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Analog Devices Inc./Maxim Integrated MAX17571ATC+T
- Part No.:
- MAX17571ATC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17571ATC+T.pdf
- Description:
- IC REG BUCK ADJ 1.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,094
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Product details
Overview
MAX17571ATC+T from Analog Devices is a high-voltage synchronous step-down DC-DC converter with integrated MOSFETs, delivering up to 1.5A output current across a 4V–60V input range, supporting adjustable output voltages from 0.9V to 90% of VIN, and operating at 400kHz–2.2MHz switching frequency. It enables compact, high-efficiency power supplies in industrial motor drives and ruggedized IoT edge nodes.
For engineers reviewing the MAX17571ATC+T datasheet, MAX17571ATC+T pinout, MAX17571ATC+T application, or MAX17571ATC+T equivalent, key selection considerations include its internal peak-current-mode control, built-in hiccup-mode overload protection, ±1.2% feedback regulation accuracy over –40°C to +125°C, and EXTVCC bias input for efficiency optimization at high VIN.
Technical Context
The MAX17571ATC+T implements fixed-frequency forced PWM operation with peak-current-mode control, using an internal transconductance error amplifier and slope compensation to ensure stable loop response across its full 0.9V–VIN×0.9 output range and 400kHz–2.2MHz switching frequency band. Its dual LDO architecture (IN-LDO and EXT-LDO) dynamically selects VCC supply source based on EXTVCC voltage, enabling seamless switchover at 4.7V.
It integrates high-side (330–620mΩ) and low-side (170–320mΩ) nMOSFETs, supports monotonic startup into prebiased outputs, and features programmable EN/UVLO thresholds (1.19–1.26V rising), soft-start via external capacitor, and open-drain RESET with 90.5–94.6% FB assertion threshold and 93.8–97.8% deassertion threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide industrial input rails including 12V, 24V, 36V, and 48V systems without external pre-regulation. |
| Output Current | 1.5A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, or isolated gate drivers in motor control. |
| Switching Frequency | 400kHz to 2.2MHz - adjustable via RT/SYNC resistor or external clock sync; enables EMI optimization and small magnetics. |
| Feedback Accuracy | ±1.2% over –40°C to +125°C - ensures stable output regulation in uncontrolled thermal environments like factory floors. |
| Peak Efficiency | 94% - achieved with synchronous rectification and optimized MOSFET RDS(on), reducing thermal load in sealed enclosures. |
| Shutdown Current | 4.65μA - enables ultra-low-power standby in battery-backed or energy-harvested edge sensors. |
| Thermal Shutdown | 165°C with 10°C hysteresis - protects silicon during sustained overload or airflow failure in convection-cooled designs. |
Pinout & Package
MAX17571ATC+T is housed in a thermally enhanced 12-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed pad (EP) for direct thermal connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power input | Accepts 4V–60V; connects directly to bulk input capacitor and must be decoupled with low-ESR ceramic. |
| EN/UVLO | Enable and input undervoltage lockout | Resistive divider sets turn-on threshold (1.19–1.26V); pull-up to VIN enables always-on operation. |
| RESET | Open-drain output voltage monitor | Asserts low when FB falls below 92% of setpoint; requires external pullup; used for system power-good signaling. |
| SS | Soft-start timing control | Capacitor-to-SGND sets ramp time; prevents input inrush and output overshoot during startup. |
| VCC | Internal 5V LDO output | Powers internal logic and low-side driver; bypassed with ≥2.2μF ceramic; regulated to 4.75–5.25V. |
| RT/SYNC | Frequency programming & external sync | Resistor-to-SGND sets fSW; accepts external clock (2.1V HI / 0.8V LO) for system-level timing coherence. |
| FB | Feedback voltage sense | Monitors resistive divider output; regulates VOUT with ±1.2% accuracy; reference = 0.9V nominal. |
| SGND | Signal ground reference | Reference node for FB, SS, RT/SYNC, RESET; must be star-connected near IC to minimize noise coupling. |
| EXTVCC | External bias input | Bypasses internal IN-LDO when supplied 5–24V; reduces chip dissipation and improves efficiency above ~24V VIN. |
| BST | Bootstrap capacitor terminal | Connects 0.1μF ceramic to LX; provides gate drive voltage for high-side MOSFET. |
| LX | Switching node | Connects to inductor switch node; carries high di/dt pulsed current; requires short, wide copper pour. |
| PGND | Power ground return | High-current return path for LX and internal MOSFETs; must be tied to SGND only at VCC bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and board area in high-current 12V–48V input applications. |
| Internal compensation | Removes need for external Type-II/III compensation network, simplifying design and improving production consistency. | All-ceramic capacitor support | Enables fully ceramic BOM with X7R/X5R MLCCs-no electrolytics required-improving reliability and lifetime in harsh environments. |
| Hiccup-mode overload protection | Enters 32,768-cycle shutdown after runaway current detection (3.09A), limiting average power dissipation during output short. |
| CISPR 32 Class B compliance | Meets radiated emissions limits for commercial equipment without added shielding or ferrites in typical layouts. |
| Monotonic prebiased startup | Prevents reverse current flow into powered outputs-critical for hot-swap and redundant power supply architectures. |
Applications
| Industrial Motor Drives | Factory Automation Sensors |
|---|---|
|
Use Scenario: Powering gate drivers and MCU peripherals in variable-frequency drives operating from 24V or 48V DC bus. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator generating 3.3V/5V/12V rails with precise sequencing and RESET monitoring. Use Value: 94% efficiency minimizes heatsink size; 60V max input accommodates regenerative braking voltage spikes. |
Use Scenario: Supplying wireless sensor nodes deployed in dusty, high-temperature manufacturing cells. IC Role / Device Role / Timing Role: Single-chip DC-DC solution providing regulated 3.3V for RF SoCs and analog front-ends. Use Value: –40°C to +125°C operation and ±1.2% FB accuracy ensure reliable sensing across ambient extremes. |
| Ruggedized IoT Gateways | Test & Measurement Equipment |
|
Use Scenario: Converting 48V PoE++ or 36V battery input to 5V/3.3V for ARM-based edge compute modules. IC Role / Device Role / Timing Role: High-density, thermally robust point-of-load regulator with EXTVCC bias for >36V input efficiency. Use Value: TDFN-EP package with thermal vias enables >1.5A delivery in space-constrained gateway enclosures. |
Use Scenario: Generating clean, low-noise analog supply rails in portable oscilloscopes and signal analyzers. IC Role / Device Role / Timing Role: Low-ripple, fast-transient-response buck converter for ADC reference and op-amp biasing. Use Value: Adjustable soft-start and monotonic prebias prevent output glitches during instrument power cycling. |
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 |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5V–65V input, 1A output, 100kHz–2.2MHz fSW, no EXTVCC pin, AEC-Q100 qualified | Automotive body electronics; lacks hiccup mode and RESET output | Choose for automotive-grade reliability where 1A suffices and RESET monitoring is not required. |
| TPS54560BQDDAQ1 | 3.5V–60V input, 5A output, 100kHz–2.5MHz fSW, integrated boot diode, no internal compensation | Higher-current industrial PLC modules; requires external compensation network | Choose when >1.5A output or external loop tuning is needed, accepting larger BOM and layout complexity. |
Compared with LM5164QDDARQ1 and TPS54560BQDDAQ1, the MAX17571ATC+T uniquely combines 1.5A capability, internal compensation, hiccup-mode protection, and RESET output in a 3mm × 3mm TDFN package-making it optimal for space-constrained, self-monitoring industrial power rails where design simplicity and fault resilience are prioritized.
Availability
MAX17571ATC+T is available at Aetrix Electronics and suitable for industrial motor drives, factory automation sensors, ruggedized IoT gateways, and test & measurement equipment requiring stable component supply and long-term manufacturability.
Supply support for MAX17571ATC+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 MAX17571ATC+T belongs to the Himalaya series of high-voltage DC-DC converters designed specifically for compact, thermally efficient, and robust power solutions in harsh industrial environments.
FAQ
What is the maximum input voltage rating for the MAX17571ATC+T?
The MAX17571ATC+T has an absolute maximum input voltage rating of +65V relative to PGND, but its specified operational input range is 4V to 60V. Operation above 60V risks violating the device's functional specifications and may trigger overvoltage protection or cause permanent damage. Always maintain VIN ≤ 60V in normal use, with appropriate derating for transient conditions per the datasheet's Absolute Maximum Ratings table.
Does the MAX17571ATC+T require external compensation components?
No, the MAX17571ATC+T features built-in compensation across its full output voltage and switching frequency ranges. This eliminates the need for external Type-II or Type-III compensation networks, reducing bill-of-materials count, PCB area, and design validation effort. The internal compensation is optimized for stability with all-ceramic output capacitors and standard inductor values.
How does the EXTVCC pin improve efficiency in the MAX17571ATC+T?
The EXTVCC pin allows the MAX17571ATC+T to bypass its internal IN-LDO and power the VCC rail directly from an external 5V–24V source-typically the converter's own output. This reduces on-chip power dissipation, especially at high input voltages (e.g., 48V), where IN-LDO dropout losses would otherwise degrade overall efficiency. When EXTVCC > 4.7V, automatic switchover occurs after soft-start completion.
What protection features are integrated into the MAX17571ATC+T?
The MAX17571ATC+T integrates multiple protection mechanisms: cycle-by-cycle peak current limiting (2.79A), runaway current detection (3.09A) triggering hiccup mode, thermal shutdown at 165°C with 10°C hysteresis, output voltage monitoring with open-drain RESET, and monotonic startup into prebiased outputs. These features collectively safeguard against overloads, shorts, overheating, and improper sequencing without external circuitry.
Can the MAX17571ATC+T synchronize to an external clock signal?
Yes, the MAX17571ATC+T supports external clock synchronization via the RT/SYNC pin. When a resistor is connected from RT/SYNC to SGND, an external clock (logic-high ≥2.1V, logic-low ≤0.8V, pulse width ≥50ns) can be coupled through a capacitor network to force the internal oscillator to lock to the external frequency after detecting 16 rising edges. This enables deterministic timing alignment in multi-rail or noise-sensitive systems.
MAX17571ATC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN 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):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 54V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 400kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX17571ATC+T FAQ
1.How can I place an order for MAX17571ATC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17571ATC+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 MAX17571ATC+T reliable?
The price and inventory of MAX17571ATC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17571ATC+T is usually 5 days.
3.What payment methods are accepted for MAX17571ATC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17571ATC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17571ATC+T?
MAX17571ATC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17571ATC+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 MAX17571ATC+T?
For technical support, including MAX17571ATC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17571ATC+T requirements.
6.How does Aetrix verify that MAX17571ATC+T is sourced from the original manufacturer or authorized distributors?
All MAX17571ATC+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 MAX17571ATC+T meets industry standards.
7.What is the process for return or replacement of MAX17571ATC+T?
All MAX17571ATC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17571ATC+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 MAX17571ATC+T part is unused and in its original packaging.
Return procedure for MAX17571ATC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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