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Analog Devices Inc./Maxim Integrated MAX17572ATC+T
- Part No.:
- MAX17572ATC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17572ATC+T.pdf
- Description:
- IC REG BUCK ADJ 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,407
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Product details
Overview
The MAX17572ATC+T 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 supports adjustable output voltages from 0.9V to 0.9 × VIN, features ±1.2% FB regulation accuracy over –40°C to +125°C, and uses peak current-mode control for stable transient response in industrial power supplies.
For engineers reviewing the MAX17572ATC+T datasheet, MAX17572ATC+T pinout, MAX17572ATC+T application, or MAX17572ATC+T equivalent, key selection considerations include its wide-input voltage range, internal compensation eliminating external loop components, programmable 400kHz–2.2MHz switching frequency, hiccup-mode overload protection, and built-in RESET with output voltage monitoring.
Technical Context
The MAX17572ATC+T implements a peak-current-mode control architecture with an internal transconductance error amplifier, slope compensation, and cycle-by-cycle current limiting. Its PWM logic drives integrated nMOS switches (RDS(on)H = 620mΩ max, RDS(on)L = 320mΩ max) and supports monotonic startup into prebiased loads.
It integrates dual LDOs-VIN-powered and EXTVCC-powered-with automatic switchover at ~4.7V, enabling efficiency optimization at high input voltages. The RT/SYNC pin enables both resistor-programmed frequency setting and external clock synchronization with 50ns minimum 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 supply rails without external pre-regulation. |
| Output Current | 1A continuous - rated across full –40°C to +125°C ambient, enabling single-rail PoL in harsh environments. |
| Feedback Accuracy | ±1.2% over –40°C to +125°C - ensures tight output regulation without trimming in temperature-critical applications. |
| Switching Frequency | 400kHz to 2.2MHz (adjustable via RT resistor or external sync) - allows EMI optimization and compact 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 thermal excursions during transients. |
Pinout & Package
The MAX17572ATC+T is housed in a 12-pin, 3mm × 3mm TDFN package with exposed pad (EP) thermally connected to PGND. The EP must be soldered to a large GND plane with multiple thermal vias for reliable operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 4.5V–60V; requires local ceramic input capacitance and optional bulk electrolytic for long traces. |
| EN/UVLO | Enable and input undervoltage threshold | Resistive divider sets turn-on voltage; 1.215V typical rising threshold enables precise brown-in/out control. |
| RESET | Open-drain fault indicator | Asserts low when VOUT drops below 92% of setpoint; deasserts after 1024 cycles once VOUT exceeds 95%. |
| SS | Soft-start timing node | Capacitor-to-GND sets ramp time; supports monotonic startup into prebiased outputs without reverse current. |
| VCC | Internal 5V LDO output | Bypassed with 2.2µF ceramic; powers internal logic and low-side driver; UVLO at 3.8V prevents erratic operation. |
| RT/SYNC | Oscillator timing & sync interface | Resistor-to-GND programs fSW; AC-coupled external clock synchronizes switching with system timing references. |
| FB | Feedback sensing input | High-impedance node referenced to 0.9V internal reference; connects to resistive divider for output voltage programming. |
| PGND | Power ground return | Separate from analog GND; must connect externally to power ground plane and tie to GND at VCC bypass capacitor. |
| BST | Bootstrap capacitor terminal | Connects 0.1µF ceramic to LX; supplies gate drive voltage for high-side MOSFET during on-time. |
| LX | Switching node | Drives external inductor; high-impedance in shutdown; requires low-inductance layout to minimize ringing and EMI. |
| EXTVCC | External LDO input | Accepts 4.84V–24V; bypasses internal VIN LDO to improve efficiency above ~12V input. |
| GND | Analog ground reference | Reference for FB, SS, RT/SYNC, RESET; tie to PGND at VCC bypass capacitor location only. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external switch selection and gate-drive design; RDS(on)H/RDS(on)L optimized for 1A operation at 60VIN. |
| Internal compensation network | Enables stable loop response across all output voltages and external component tolerances without external Type-II/III compensation. |
| All-ceramic capacitor support | Reduces board area and improves reliability by removing electrolytics; compatible with X7R/X5R MLCCs for industrial temp range. |
| Hiccup-mode overload protection | Shuts down for 32,768 clock cycles upon runaway current or sustained FB undervoltage, limiting power dissipation during short-circuit faults. |
| Programmable EN/UVLO threshold | Allows custom input brown-out behavior using two-resistor divider; prevents false turn-on during rail ramp-up or sag. |
| Monotonic startup into prebiased output | Prevents reverse current flow during power-up when output is already biased; critical for hot-swap and redundant supply systems. |
Applications
| Industrial Control Power Supplies | General-Purpose Point-of-Load |
|---|---|
|
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 bus to 3.3V/5V/12V logic and analog rails. Use Value: Wide 4.5V–60V input accommodates rail sag and surge; –40°C to +125°C rating ensures operation inside sealed enclosures. |
Use Scenario: Local regulation for FPGA core, memory, or microcontroller subsystems on dense PCBs with limited space. IC Role / Device Role / Timing Role: Compact, self-contained step-down converter replacing discrete controller + external MOSFETs. Use Value: All-ceramic design and 3mm × 3mm TDFN enable high-density layouts; internal compensation reduces BOM count by ≥3 components. |
| Distributed Supply Regulation | Base Station Power Supplies |
|
Use Scenario: Secondary regulation in telecom equipment where intermediate 12V or 5V rails feed downstream point-of-load converters. IC Role / Device Role / Timing Role: Intermediate buck stage providing clean, well-regulated input to downstream POLs or ADC/DAC supplies. Use Value: 400kHz–2.2MHz programmability avoids sensitive frequency bands; RESET output enables system-level power sequencing. |
Use Scenario: Power conversion in remote radio units (RRUs) and small-cell base stations operating from 48V DC plant power. IC Role / Device Role / Timing Role: High-reliability buck converter powering RF front-end bias supplies and digital control logic. Use Value: Hiccup-mode protection sustains operation during antenna VSWR faults; thermal shutdown with 10°C hysteresis prevents latch-up in enclosed housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5V–65V input, 1A, requires external compensation; no integrated EXTVCC LDO or RESET output. | Lacks built-in output monitoring and hiccup-mode protection; needs external circuitry for sequencing and fault reporting. | Preferred where AEC-Q100 qualification is mandatory; otherwise MAX17572ATC+T offers higher integration and simpler layout. |
| TPS54160DGQR | 3.5V–60V input, 1.5A, uses current-mode control but lacks internal MOSFETs; requires external high-side/low-side FETs. | Higher BOM count and layout complexity; no internal LDO or soft-start capacitor programming. | Used when higher current headroom or discrete FET selection is required; MAX17572ATC+T delivers lower total solution size and faster design cycle. |
Compared with LM5164QDDARQ1 and TPS54160DGQR, the MAX17572ATC+T provides superior integration-combining internal MOSFETs, dual-LDO power management, RESET monitoring, and fully internal compensation-reducing design effort, bill-of-materials cost, and PCB footprint for industrial and telecom PoL applications.
Availability
MAX17572ATC+T is available at Aetrix Electronics and suitable for industrial control power supplies, distributed supply regulation, base station power supplies, and high-voltage single-board systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX17572ATC+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 industrial, automotive, and communications markets.
The MAX17572ATC+T belongs to Maxim's high-voltage DC-DC converter product line, engineered for robust, compact, and efficient power conversion in harsh industrial environments where wide input range, thermal resilience, and functional safety features are essential.
FAQ
What is the maximum input voltage rating for the MAX17572ATC+T?
The MAX17572ATC+T has an absolute maximum input voltage (VIN to PGND) of +65V, but its specified operational input range is 4.5V to 60V. Operation beyond 60V may cause permanent damage or violate safety margins defined in the Absolute Maximum Ratings table. For reliable long-term performance, maintain VIN ≤ 60V under all conditions including transients and ripple.
Does the MAX17572ATC+T require external compensation components?
No, the MAX17572ATC+T features internal compensation that eliminates the need for external Type-II or Type-III compensation networks. This simplifies design, reduces component count, and ensures stable loop response across the full output voltage range (0.9V to 0.9 × VIN) and load conditions without manual tuning.
How does the MAX17572ATC+T handle startup into a prebiased output?
The MAX17572ATC+T implements monotonic startup into prebiased outputs: both high-side and low-side MOSFETs remain off until the internal PWM comparator commands the first pulse. This prevents reverse current flow and ensures smooth, controlled ramp-up of VOUT to the target regulation level without disturbing existing system bias.
What is the function of the EXTVCC pin on the MAX17572ATC+T?
The EXTVCC pin on the MAX17572ATC+T accepts an external 4.84V–24V supply to power the internal 5V LDO, bypassing the VIN-powered LDO. When EXTVCC > 4.7V (typ), the device automatically switches to EXTVCC, improving efficiency-especially at high input voltages-by reducing dropout losses and associated heat generation in the VCC regulator.
Can the MAX17572ATC+T synchronize its switching frequency to an external clock?
Yes, the MAX17572ATC+T supports external clock synchronization via the RT/SYNC pin. An AC-coupled external clock signal (logic-high > 2.1V, logic-low < 0.8V, pulse width > 50ns) can be applied through a coupling capacitor. After detecting 16 edges, the internal oscillator locks to the external frequency, enabling deterministic timing alignment in multi-rail or noise-sensitive systems.
MAX17572ATC+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):
- 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+T FAQ
1.How can I place an order for MAX17572ATC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17572ATC+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 MAX17572ATC+T reliable?
The price and inventory of MAX17572ATC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17572ATC+T is usually 5 days.
3.What payment methods are accepted for MAX17572ATC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17572ATC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17572ATC+T?
MAX17572ATC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17572ATC+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 MAX17572ATC+T?
For technical support, including MAX17572ATC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17572ATC+T requirements.
6.How does Aetrix verify that MAX17572ATC+T is sourced from the original manufacturer or authorized distributors?
All MAX17572ATC+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 MAX17572ATC+T meets industry standards.
7.What is the process for return or replacement of MAX17572ATC+T?
All MAX17572ATC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17572ATC+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 MAX17572ATC+T part is unused and in its original packaging.
Return procedure for MAX17572ATC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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