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Analog Devices Inc./Maxim Integrated MAX17572ATC+
- Part No.:
- MAX17572ATC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17572ATC+.pdf
- Description:
- IC REG BUCK ADJ 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,015
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Product details
Overview
The MAX17572ATC+ from Maxim Integrated is a high-voltage, synchronous step-down DC-DC converter with integrated high-side and low-side MOSFETs, operating from 4.5V to 60V input and delivering up to 1A continuous output current. It features peak current-mode control, ±1.2% feedback voltage accuracy over –40°C to +125°C, and internal compensation enabling stable regulation across 0.9V to 0.9×VIN output range. Used in industrial power supplies and high-voltage single-board systems where compact, efficient, and robust point-of-load conversion is required.
For engineers reviewing the MAX17572ATC+ datasheet, MAX17572ATC+ pinout, MAX17572ATC+ application, or MAX17572ATC+ equivalent, key selection considerations include its 400kHz–2.2MHz adjustable switching frequency, hiccup-mode overload protection, monotonic startup into prebiased loads, built-in RESET with 92–95% output monitoring window, and thermal shutdown at +165°C with 10°C hysteresis.
Technical Context
The MAX17572ATC+ implements a peak-current-mode control architecture with an internal transconductance error amplifier, slope compensation, and cycle-by-cycle current limiting. Its PWM logic uses clock-synchronized high-side turn-on and complementary low-side activation, with minimum on-time of 80ns and off-time of 150ns to support high VIN/VOUT ratios.
It integrates dual LDOs-VIN-powered and EXTVCC-powered-with automatic switchover at ~4.7V; VCC regulates to 5.0V ±2.5% and powers internal logic and gate drivers. The RT/SYNC pin supports both resistor-programmed frequency (400kHz–2.2MHz) and external clock synchronization with 50ns pulse width and 2.1V/0.8V logic thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and telecom input rails without external pre-regulation. |
| Output Current | Continuous 1A - rated over full –40°C to +125°C ambient, enabling reliable operation in harsh environments. |
| Feedback Accuracy | ±1.2% over –40°C to +125°C - ensures tight output regulation without external trimming or calibration. |
| Switching Frequency | 400kHz to 2.2MHz (adjustable via RT resistor or external sync) - allows EMI optimization and small magnetics selection. |
| Peak Efficiency | >92% - achieved using synchronous rectification and auxiliary bootstrap LDO, reducing conduction losses. |
| Shutdown Current | 4.65µA - enables ultra-low-power standby in battery-backed or energy-sensitive systems. |
| Thermal Shutdown | +165°C with 10°C hysteresis - protects against sustained overload while permitting brief transient overloads. |
Pinout & Package
The MAX17572ATC+ is housed in a 12-pin, 3mm × 3mm TDFN package with exposed pad (EP) connected to GND for thermal management. Pin pitch is 0.5mm; land pattern follows JEDEC MO-229 standard (Outline 21-0664, Land Pattern 90-0397).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 4.5V–60V supply; must withstand 65V absolute max; connects to input capacitor bank. |
| EN/UVLO | Enable and input UVLO control | Resistive divider sets turn-on threshold (1.215V typ); pull-up to VIN for always-on operation. |
| RESET | Open-drain output monitor | Asserts low when FB drops below 92% of target; releases after 1024 cycles once FB rises above 95%. |
| SS | Soft-start timing node | Capacitor-to-GND sets ramp time; supports monotonic startup into prebiased outputs. |
| VCC | Internal 5V LDO output | Bypassed with 2.2µF ceramic; powers internal logic and low-side driver; UVLO at 3.8V/4.2V. |
| RT/SYNC | Oscillator timing & sync interface | Resistor-to-GND sets fSW; external clock coupled via AC network enables system-level timing alignment. |
| FB | Voltage feedback input | Monitors resistive divider output; reference voltage = 0.9V ±1.2%; bias current <±50nA. |
| GND | Analog ground reference | Separate from PGND; connects to VCC bypass cap ground return for noise isolation. |
| EXTVCC | External LDO input | Accepts 4.84V–24V; bypasses internal VIN LDO to improve efficiency at high input voltages. |
| BST | Bootstrap capacitor node | Connects 0.1µF ceramic to LX; supplies gate drive for high-side MOSFET. |
| LX | Switching node | Drives external inductor; high-impedance during shutdown; handles ±1.6A RMS current. |
| PGND | Power ground return | Carries high di/dt currents; must be tied to GND at VCC bypass cap location with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | RDS-ONH = 620mΩ max, RDS-ONL = 320mΩ max - eliminates external FETs and reduces BOM count and layout area. |
| Internal compensation network | Stable across full 0.9V–0.9×VIN output range - removes need for external compensation components and simplifies design. |
| Hiccup-mode overload protection | Triggers at 0.58V FB (≈92% of setpoint) and suspends switching for 32,768 cycles - limits power dissipation during short-circuit faults. |
| Programmable EN/UVLO threshold | Adjustable via resistive divider (VENR = 1.215V typ) - enables precise input rail sequencing and brownout immunity. |
| Auxiliary bootstrap LDO | Supplies dedicated gate-drive voltage to BST - improves high-side drive strength and efficiency at high duty cycles. |
| Prebiased output startup | Both switches remain off until first PWM pulse - prevents reverse current flow and ensures monotonic VOUT ramp. |
Applications
| Industrial Control Power Supplies | Base Station Power Supplies |
|---|---|
Use Scenario: Powering PLC I/O modules, motor drivers, and sensor interfaces in factory automation cabinets with 24V/48V DC distribution rails. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 48V backplane to 5V/3.3V logic rails with hiccup protection against field-wiring faults. Use Value: 92% peak efficiency and 4.65µA shutdown current reduce thermal load and enable fanless enclosure designs. |
Use Scenario: Generating intermediate 5V/3.3V rails from 48V telecom rectifier outputs in remote radio units and small-cell base stations. IC Role / Device Role / Timing Role: High-reliability point-of-load converter with RESET signaling to FPGA/MCU for power-good status and fault reporting. Use Value: Built-in output voltage monitoring (92–95% window) and thermal shutdown (+165°C) ensure uptime in uncooled outdoor deployments. |
| Distributed Supply Regulation | High-Voltage, Single-Board Systems |
Use Scenario: Local regulation on multi-layer PCBs with long power delivery paths, such as test equipment backplanes or modular instrumentation. IC Role / Device Role / Timing Role: Synchronous buck controller with EXTVCC option to bypass internal LDO and minimize dropout loss at 36–60V inputs. Use Value: Adjustable soft-start (via SS pin) and monotonic prebias startup prevent bus droop and downstream reset glitches during hot-swap events. |
Use Scenario: Powering SoCs, FPGAs, and ADCs directly from high-voltage batteries or PoE++ sources in portable medical or defense electronics. IC Role / Device Role / Timing Role: Wide-input buck converter with internal MOSFETs and 125°C ambient rating for compact, thermally constrained enclosures. Use Value: 3mm × 3mm TDFN package with EP enables high power density; internal compensation accelerates design validation. |
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, requires external compensation; no integrated EXTVCC LDO bypass; RESET not included. | Lacks built-in RESET and EXTVCC option; requires additional components for output monitoring and efficiency optimization. | Choose LM5164QDDARQ1 only if AEC-Q100 automotive qualification is mandatory and EXTVCC/RESET features are unnecessary. |
| TPS54160DGQR | 3.5V–60V input, 1.5A, external MOSFETs required; no internal compensation; fixed 2.2MHz option only. | Higher current but needs external high-side/low-side FETs and compensation network; larger solution size. | Select TPS54160DGQR when higher output current (>1A) is needed and board space permits discrete FET layout and tuning. |
Compared with LM5164QDDARQ1 and TPS54160DGQR, the MAX17572ATC+ delivers superior integration (internal FETs, EXTVCC bypass, RESET, internal compensation), smaller footprint (3mm × 3mm), and lower component count-making it optimal for space-constrained industrial and telecom point-of-load designs where reliability and ease of use are prioritized over automotive qualification or >1A current scaling.
Availability
The MAX17572ATC+ is available at Aetrix Electronics and suitable for industrial control power supplies, base station power supplies, and distributed supply regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17572ATC+ 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 industrial, automotive, communications, and computing applications.
The MAX17572ATC+ belongs to Maxim's high-voltage DC-DC converter product line, engineered specifically for robust, compact, and efficient point-of-load regulation in harsh industrial and telecom environments where wide input range and high reliability are critical.
FAQ
What is the maximum allowable input voltage for the MAX17572ATC+?
The MAX17572ATC+ has an absolute maximum VIN rating of +65V, but its specified operational input range is 4.5V to 60V. Exceeding 60V may cause premature device failure or violate safety margins defined in the Absolute Maximum Ratings table. For reliable long-term operation, maintain VIN ≤ 60V under all conditions including transients and ripple.
Does the MAX17572ATC+ support external clock synchronization, and what are the signal requirements?
Yes, the MAX17572ATC+ supports external clock synchronization via the RT/SYNC pin. The external clock must have logic-high ≥2.1V, logic-low ≤0.8V, pulse width ≥50ns, and frequency within 1.1× to 1.4× the internally programmed fSW. A coupling network (resistor + capacitor) is required; the internal oscillator locks after detecting 16 valid edges.
How does the MAX17572ATC+ handle startup into a prebiased output voltage?
The MAX17572ATC+ implements monotonic prebiased startup: both high-side and low-side MOSFETs remain off until the first PWM command, preventing reverse current flow. The output voltage ramps smoothly from its initial value to the regulated setpoint, eliminating output overshoot or undershoot during hot-swap or partial-power-up scenarios.
What is the function of the EXTVCC pin on the MAX17572ATC+, and how does it affect efficiency?
The EXTVCC pin on the MAX17572ATC+ accepts an external 4.84V–24V supply to power the internal 5V VCC LDO, bypassing the VIN-powered LDO. This reduces power loss in the VCC regulator at high input voltages (e.g., 48V), improving overall system efficiency by up to 2–3% compared to VIN-only operation.
Can the MAX17572ATC+ operate with all-ceramic output capacitors, and what type is recommended?
Yes, the MAX17572ATC+ is designed for all-ceramic output capacitors. X7R dielectric types are recommended for industrial applications due to their stable capacitance over temperature (–55°C to +125°C) and voltage. Derating for DC bias must be applied; typical selection uses 10–22µF per 1A output, sized to limit step-load deviation to ≤3% of VOUT.
MAX17572ATC+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tray
- 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:
- 1A
- 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)
MAX17572ATC+ FAQ
1.How can I place an order for MAX17572ATC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17572ATC+ 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 MAX17572ATC+ reliable?
The price and inventory of MAX17572ATC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17572ATC+ is usually 5 days.
3.What payment methods are accepted for MAX17572ATC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17572ATC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17572ATC+?
MAX17572ATC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17572ATC+ 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 MAX17572ATC+?
For technical support, including MAX17572ATC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17572ATC+ requirements.
6.How does Aetrix verify that MAX17572ATC+ is sourced from the original manufacturer or authorized distributors?
All MAX17572ATC+ 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 MAX17572ATC+ meets industry standards.
7.What is the process for return or replacement of MAX17572ATC+?
All MAX17572ATC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17572ATC+, 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 MAX17572ATC+ part is unused and in its original packaging.
Return procedure for MAX17572ATC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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