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Analog Devices Inc./Maxim Integrated MAX17575ATC+
- Part No.:
- MAX17575ATC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17575ATC+.pdf
- Description:
- IC REG BUCK ADJ 1.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:145
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Product details
Overview
The MAX17575ATC+ 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 1.5A 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 in forced PWM mode for stable industrial power conversion.
For engineers reviewing the MAX17575ATC+ datasheet, MAX17575ATC+ pinout, MAX17575ATC+ application, or MAX17575ATC+ equivalent, this device is selected for high-input-voltage point-of-load regulation where compact size, internal compensation, hiccup-mode overload protection, and monotonic startup into prebiased loads are critical design requirements.
Technical Context
The MAX17575ATC+ implements a peak-current-mode controller with fixed-frequency forced PWM operation, enabling predictable switching behavior across load and line variations. Its internal transconductance error amplifier, slope compensation generator, and cycle-by-cycle current sensing provide robust loop stability without external compensation components.
It integrates dual LDOs - one powered from VIN and another from EXTVCC - with automatic switchover at ~4.7V to maximize efficiency at high input voltages. The device also embeds thermal shutdown (165°C), hiccup-mode overcurrent protection (triggered at 2.75A runaway limit), and open-drain RESET monitoring with 92–95% VOUT threshold hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and telecom input rails including 12V, 24V, 36V, and 48V systems without external pre-regulation. |
| Output Current | 1.5A continuous - rated over full –40°C to +125°C ambient, enabling reliable operation in harsh environments without derating. |
| Feedback Accuracy | ±1.2% over –40°C to +125°C - ensures tight output regulation across temperature without calibration or trimming. |
| Switching Frequency | 400kHz to 2.2MHz (adjustable via RT/SYNC resistor or external sync) - allows optimization of size vs. EMI and enables synchronization to system clocks. |
| Minimum On-Time | 60ns - supports high VIN/VOUT ratios (e.g., 48V→3.3V) at high frequencies while maintaining controllable duty cycle. |
| Shutdown Current | 4.65µA - minimizes standby power loss in battery-backed or energy-sensitive applications. |
| Efficiency Peak | 94% - achieved using synchronous rectification and low RDS-ON MOSFETs (330mΩ HS / 170mΩ LS), reducing conduction losses. |
Pinout & Package
The MAX17575ATC+ is housed in a thermally enhanced 12-pin TDFN package (3mm × 3mm) with exposed pad (EP) for improved heat dissipation. Pin layout follows standard buck converter topology with dedicated BST, LX, PGND, and EXTVCC terminals for optimal layout and noise control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 4.5V–60V supply; must be decoupled with low-ESR ceramic capacitor near pin. |
| EN/UVLO | Enable and input undervoltage lockout | Configurable turn-on threshold (1.215V typ); connect to resistive divider from VIN to GND for programmable UVLO. |
| RESET | Open-drain output voltage monitor | Asserts low when FB drops below 92% of setpoint; deasserts after 1024 cycles once FB rises above 95% - provides reliable power-good signaling. |
| SS | Soft-start timing control | Capacitor-to-GND sets soft-start duration (e.g., 12nF = 2ms); prevents inrush current during startup into prebiased loads. |
| VCC | Internal 5V LDO output | Powers internal logic and low-side driver; bypass with ≥2.2µF ceramic capacitor; UVLO at 3.8V falling. |
| RT/SYNC | Oscillator timing and clock sync | Resistor-to-GND sets fSW (400kHz–2.2MHz); accepts external clock pulses >2.1V for system-level synchronization. |
| FB | Feedback input | Monitors output via resistive divider; 0.9V reference enables precise output setting from 0.9V to 0.9×VIN. |
| GND | Analog ground reference | Separate from PGND; tie to VCC bypass cap ground return to minimize noise coupling into control circuitry. |
| EXTVCC | External LDO input | Bypasses internal VIN-powered LDO when supplied 4.84V–24V; improves efficiency at high VIN by reducing LDO dropout loss. |
| BST | Bootstrap capacitor node | Connect 0.1µF ceramic between BST and LX to charge high-side gate driver; critical for proper HS MOSFET turn-on. |
| LX | Switching node | Connects to inductor switch node; carries high di/dt; requires short, low-inductance trace to minimize ringing and EMI. |
| PGND | Power ground | High-current return path for LX and internal MOSFETs; connect externally to large ground plane with multiple thermal vias under EP. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates need for external switches and gate drivers; reduces BOM count and layout complexity in space-constrained designs. |
| Internal compensation network | Enables stable operation across full output voltage range (0.9V–0.9×VIN) without external compensation components or tuning. |
| Hiccup-mode overload protection | Shuts down converter for 32,768 clock cycles upon overcurrent or low FB condition, limiting power dissipation during sustained faults. |
| Monotonic startup into prebiased output | Prevents reverse current flow during start-up; both HS and LS FETs remain off until first PWM pulse, ensuring safe ramp-up. |
| Programmable EN/UVLO threshold | Allows custom input voltage turn-on point (e.g., 15V or 28V) using simple resistor divider - avoids premature enable or brownout resets. |
Applications
| Industrial Control Power Supplies | Base Station Power Supplies |
|---|---|
Use Scenario: Powering PLC I/O modules, motor drives, and fieldbus interfaces in factory automation cabinets with 24V or 48V backplanes. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 48V rail to 3.3V/5V for microcontrollers, sensors, and communication ICs. Use Value: High input voltage tolerance and -40°C to +125°C operation ensure reliability in uncooled enclosures; hiccup protection prevents thermal runaway during short-circuited sensor lines. |
Use Scenario: Generating intermediate rails (e.g., 5V, 12V) from 48V telecom rectifier outputs in 4G/5G remote radio units (RRUs). IC Role / Device Role / Timing Role: Point-of-load DC-DC converter supplying FPGA, RF transceivers, and analog front-end circuits. Use Value: 2.2MHz max switching frequency enables small inductors and capacitors; EXTVCC support improves efficiency at 48V input, reducing thermal load in sealed outdoor enclosures. |
| Distributed Supply Regulation | Wall Transformer Regulation |
Use Scenario: Local regulation on PCBs with long input traces from centralized 24V/36V supplies in medical imaging or test equipment. IC Role / Device Role / Timing Role: Secondary buck stage providing clean, low-noise 1.8V/3.3V for ADCs, DACs, and precision amplifiers. Use Value: Internal compensation and all-ceramic capacitor support simplify layout; low minimum on-time maintains regulation even with 24V→1.8V conversion at 1MHz. |
Use Scenario: Replacing linear regulators or discrete buck solutions in AC/DC adapter secondary-side regulation for consumer electronics. IC Role / Device Role / Timing Role: Efficient step-down converter generating 5V/9V/12V from unregulated DC bus derived from bridge rectifier and bulk capacitor. Use Value: 4.65µA shutdown current extends standby life; adjustable soft-start prevents tripping of upstream current-limited wall adapters during plug-in events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5V–65V input, 1A output, valley-current-mode control, no internal EXTVCC LDO; requires external compensation. | Automotive AEC-Q100 qualified; lacks hiccup mode and monotonic prebias startup - less suited for industrial fault-tolerant designs. | Select LM5164QDDARQ1 only if automotive qualification and lower current (≤1A) are primary requirements; MAX17575ATC+ offers higher current and superior fault handling. |
| TPS543620RGLT | 4.5V–18V input, 3.5A output, 2.2MHz max fSW, integrated boot diode; no EXTVCC option or hiccup mode. | Optimized for low-VIN, high-current applications (e.g., server POL); incompatible with >18V inputs and lacks industrial-grade thermal protection. | Choose TPS543620RGLT for 12V systems needing >2A; MAX17575ATC+ remains preferred for 24V+/48V industrial rails requiring robustness and wide VIN. |
Compared with LM5164QDDARQ1 and TPS543620RGLT, the MAX17575ATC+ uniquely combines 60V input capability, 1.5A current, hiccup-mode protection, monotonic prebias startup, and EXTVCC efficiency boost - making it the most balanced choice for high-reliability, wide-input industrial power conversion.
Availability
The MAX17575ATC+ is available at Aetrix Electronics and suitable for industrial control power supplies, base station power supplies, distributed supply regulation, and wall transformer regulation requiring stable component supply across extended temperature and high-input-voltage conditions.
Supply support for MAX17575ATC+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing markets.
The MAX17575ATC+ belongs to Maxim's high-voltage DC-DC converter product line, engineered specifically for rugged, wide-input industrial power conversion where reliability, internal integration, and thermal resilience are essential.
FAQ
What is the maximum input voltage rating for the MAX17575ATC+?
The MAX17575ATC+ has an absolute maximum input voltage (VIN to PGND) of +65V, but its specified operational input range is 4.5V to 60V. Operation within this 4.5V–60V window ensures guaranteed performance across temperature and load, including peak efficiency, stable regulation, and full feature functionality such as hiccup-mode protection and RESET assertion. Exceeding 60V may compromise long-term reliability or trigger absolute maximum stress conditions.
Does the MAX17575ATC+ require external compensation components?
No, the MAX17575ATC+ does not require external compensation components. It features an internally compensated error amplifier architecture that maintains loop stability across its entire output voltage range (0.9V to 0.9 × VIN) and full load/temperature conditions. This eliminates the need for external Type-II or Type-III compensation networks, simplifying design, reducing BOM cost, and improving layout robustness - a key differentiator versus many competing controllers.
How does the MAX17575ATC+ handle startup into a prebiased output?
The MAX17575ATC+ supports monotonic startup into a prebiased output by holding both high-side and low-side MOSFETs off until the first PWM command is issued. During this phase, no current is sunk from the output rail, preventing reverse current flow and potential damage to downstream circuitry. Once enabled, the output ramps smoothly to the target voltage aligned with the internal reference, ensuring safe and controlled power-up in systems with backup supplies or shared rails.
What is the purpose of the EXTVCC pin on the MAX17575ATC+?
The EXTVCC pin on the MAX17575ATC+ provides an auxiliary input to power the internal 5V LDO, bypassing the VIN-powered LDO when a 4.84V–24V supply is applied. This reduces power loss in the LDO stage at high input voltages (e.g., 48V), directly improving overall efficiency. When EXTVCC is absent or below threshold, the device automatically reverts to VIN-powered operation - enabling flexible system-level power architecture without manual switching.
Can the MAX17575ATC+ be synchronized to an external clock signal?
Yes, the MAX17575ATC+ can be synchronized to an external clock via the RT/SYNC pin. An external pulse train (logic-high >2.1V, logic-low <0.8V, pulse width ≥50ns) coupled through a capacitor locks the internal oscillator to the external frequency after detecting 16 edges. The RT/SYNC resistor must be selected to set the nominal fSW ~10% below the external clock frequency to ensure reliable capture - supporting deterministic timing in multi-rail or noise-sensitive systems.
MAX17575ATC+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- 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:
- 1.5A
- Frequency - Switching:
- 400kHz ~ 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX17575ATC+ FAQ
1.How can I place an order for MAX17575ATC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17575ATC+ 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 MAX17575ATC+ reliable?
The price and inventory of MAX17575ATC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17575ATC+ is usually 5 days.
3.What payment methods are accepted for MAX17575ATC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17575ATC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17575ATC+?
MAX17575ATC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17575ATC+ 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 MAX17575ATC+?
For technical support, including MAX17575ATC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17575ATC+ requirements.
6.How does Aetrix verify that MAX17575ATC+ is sourced from the original manufacturer or authorized distributors?
All MAX17575ATC+ 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 MAX17575ATC+ meets industry standards.
7.What is the process for return or replacement of MAX17575ATC+?
All MAX17575ATC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17575ATC+, 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 MAX17575ATC+ part is unused and in its original packaging.
Return procedure for MAX17575ATC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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