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Analog Devices Inc./Maxim Integrated MAX17575ATC+T
- Part No.:
- MAX17575ATC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17575ATC+T.pdf
- Description:
- IC REG BUCK ADJ 1.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,247
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Product details
Overview
The MAX17575ATC+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 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+T datasheet, MAX17575ATC+T pinout, MAX17575ATC+T application, or MAX17575ATC+T equivalent, key selection considerations include its 400kHz–2.2MHz programmable switching frequency, internal compensation eliminating external loop components, hiccup-mode overload protection, monotonic startup into prebiased loads, and support for EXTVCC bypass to improve efficiency at high VIN.
Technical Context
The MAX17575ATC+T implements a peak-current-mode control architecture with an internal transconductance error amplifier, slope compensation, and cycle-by-cycle current limiting. Its fixed-frequency forced PWM operation ensures consistent EMI behavior and avoids subharmonic oscillation across the full duty cycle range.
It integrates dual LDOs-one powered from VIN and another from EXTVCC-with automatic switchover at ~4.7V to optimize efficiency; the VCC output is regulated to 5V ±5% and powers internal logic and gate drivers. The device also embeds a dedicated RESET comparator with 92% undervoltage trip and 95% overvoltage release thresholds, plus thermal shutdown at 165°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial 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 point-of-load regulation in thermally constrained enclosures. |
| Feedback Accuracy | ±1.2% over –40°C to +125°C - ensures tight output voltage regulation across industrial temperature extremes without calibration. |
| Switching Frequency | 400kHz to 2.2MHz (adjustable via RT/SYNC resistor or external sync clock) - enables compact magnetics and noise-sensitive layout optimization. |
| Min On/Off Time | 80ns / 150ns - supports high VIN/VOUT ratios (e.g., 48V→3.3V) at high frequencies while maintaining controllable duty cycle. |
| Efficiency Peak | 94% - achieved using synchronous rectification, low RDS-ON MOSFETs (330mΩ HS / 170mΩ LS), and auxiliary bootstrap LDO. |
| Shutdown Current | 4.65µA - enables ultra-low-power system standby modes in battery-backed or energy-harvesting applications. |
Pinout & Package
MAX17575ATC+T is housed in a 12-pin, 3mm × 3mm TDFN-EP package with exposed pad (EP) for enhanced thermal dissipation. Pin mapping follows JEDEC-standard top-view orientation with EP electrically connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 4.5V–60V supply; must withstand transient surges up to +65V absolute max. |
| EN/UVLO | Enable & input UVLO control | Adjustable turn-on threshold (1.19–1.26V rising); connect to resistive divider from VIN to set custom UVLO point. |
| RESET | Open-drain fault indicator | Asserts low when FB falls below 92% of target; releases 1024 cycles after FB rises above 95% - provides clean power-good signaling. |
| SS | Soft-start timing node | Connect external capacitor to GND to program monotonic startup time; prevents inrush into prebiased outputs. |
| VCC | Internal 5V LDO output | Bypass with ≥2.2µF ceramic capacitor; powers internal logic, gate drivers, and recharges BST capacitor. |
| RT/SYNC | Oscillator timing & sync input | Set fSW via resistor to GND (400kHz–2.2MHz); accept external clock pulses >2.1V/ <0.8V for system-level synchronization. |
| FB | Feedback sensing input | High-impedance node referenced to 0.9V internal reference; connects to center of output voltage divider. |
| GND | Analog ground reference | Separate from PGND; tie to VCC bypass cap ground return to minimize noise coupling into error amplifier. |
| EXTVCC | External LDO supply input | Apply 4.84V–24V to bypass VIN-powered LDO and reduce power loss at high input voltages. |
| BST | Bootstrap capacitor node | Connect 0.1µF ceramic capacitor between BST and LX to drive high-side MOSFET gate above VIN. |
| LX | Switching node | Connects to inductor switch node; carries high di/dt current - requires short, low-inductance PCB trace. |
| PGND | Power ground return | Low-impedance path for high-current LX return; connect externally to large ground plane with multiple thermal vias under EP. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 330mΩ high-side and 170mΩ low-side nMOS - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Internal compensation | Single-pole-zero network embedded in error amplifier - enables stable operation across full 0.9V–0.9×VIN output range without external RC networks. |
| Hiccup-mode protection | Triggers on FB < 0.58V or runaway current >2.75A - limits average power dissipation during sustained overload or short-circuit conditions. |
| Prebiased startup | Zero-current startup sequence - prevents reverse current flow into powered outputs, critical for hot-swap and redundant supply designs. |
| Thermal robustness | Junction temp limit = 150°C, shutdown at 165°C with 10°C hysteresis - ensures reliability in sealed industrial enclosures without active cooling. |
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 5V/3.3V logic supplies with high PSRR and fast load transient response. Use Value: 94% peak efficiency and 4.65µA shutdown current extend uptime in unattended remote installations; hiccup mode prevents thermal runaway during sensor fault events. |
Use Scenario: Generating intermediate rails (e.g., 5V, 3.3V) from 48V telecom rectifier output in 4G/5G macro base station RF units. IC Role / Device Role / Timing Role: Point-of-load converter supplying FPGA, ADC/DAC, and RF front-end ICs with low-noise, tightly regulated voltage. Use Value: 400kHz–2.2MHz programmable fSW allows EMI filtering alignment with cellular band gaps; EXTVCC bypass improves efficiency at 48V input by reducing LDO dropout loss. |
| Distributed Supply Regulation | High-Voltage, Single-Board Systems |
Use Scenario: Local regulation on multi-layer PCBs where centralized 12V/24V distribution feeds isolated subsystems (e.g., analog front ends, communication interfaces). IC Role / Device Role / Timing Role: Compact, self-contained buck stage replacing discrete controllers + MOSFETs, minimizing board area and component count. Use Value: All-ceramic capacitor support and internal compensation enable <10mm² solution size; monotonic startup prevents bus contention in distributed clock domains. |
Use Scenario: Powering entire embedded computing modules (e.g., ARM-based edge AI nodes) directly from high-voltage DC sources like PoE++ (57V) or solar MPPT outputs. IC Role / Device Role / Timing Role: Primary HV-to-LV conversion stage delivering 1.5A at 3.3V/5V with minimal external components and no heatsink requirement. Use Value: 60V absolute max VIN rating and -40°C to +125°C operation allow direct integration into harsh-environment single-board computers without derating. |
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, 1.2MHz fixed fSW, no internal compensation - requires external loop components. | Lacks RESET output and EXTVCC bypass; lower current rating limits use in 1.5A+ loads. | Select when AEC-Q100 qualification is required and 1A output suffices; avoid if internal compensation or 1.5A capability is mandatory. |
| TPS54360BDDAR | 3.5V–60V input, 3.5A output, 100kHz–2.5MHz adjustable fSW, no integrated low-side MOSFET - external sync FET needed. | Higher current but larger solution size due to external FET and driver; no built-in hiccup or prebias support. | Choose for higher output current needs where board space permits external FET layout; not drop-in due to different pinout and control architecture. |
Compared with LM5164QDDARQ1 and TPS54360BDDAR, the MAX17575ATC+T delivers 1.5A with full internal integration (MOSFETs, compensation, RESET, soft-start), enabling smaller, more robust industrial power designs without sacrificing thermal or protection performance.
Availability
MAX17575ATC+T 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 assurance, and RoHS-compliant packaging.
Supply support for MAX17575ATC+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 MAX17575ATC+T belongs to Maxim's high-voltage DC-DC converter product line, engineered specifically for rugged, high-efficiency point-of-load regulation in industrial and telecom infrastructure where wide input range, thermal resilience, and protection integrity are critical.
FAQ
What is the maximum input voltage rating for the MAX17575ATC+T?
The MAX17575ATC+T has an absolute maximum input voltage rating of +65V between VIN and PGND, with recommended continuous operation from 4.5V to 60V. This 60V upper limit ensures reliable performance in 48V industrial and telecom systems while maintaining margin against transients. Operation beyond 60V is not guaranteed and may trigger overvoltage stress conditions.
Does the MAX17575ATC+T support external clock synchronization?
Yes, the MAX17575ATC+T supports external clock synchronization via the RT/SYNC pin. An external pulse train with logic-high >2.1V, logic-low <0.8V, and pulse width >50ns can be coupled through a capacitor to synchronize the internal oscillator. The device locks to the external frequency after detecting 16 edges, provided the RT/SYNC resistor is set to 10% below the target sync frequency.
How does the MAX17575ATC+T handle startup into a prebiased output?
The MAX17575ATC+T implements monotonic prebiased startup: both high-side and low-side MOSFETs remain off until the internal reference ramps up, preventing reverse current flow into an already-powered output rail. This behavior is confirmed in the datasheet's "Prebiased Output" section and verified in typical operating waveforms (Figure toc07/toc08), ensuring safe hot-swap and redundant supply integration.
What is the purpose of the EXTVCC pin on the MAX17575ATC+T?
The EXTVCC pin on the MAX17575ATC+T accepts an external 4.84V–24V supply to power the internal 5V LDO, bypassing the VIN-powered LDO path. This reduces conduction losses at high input voltages (e.g., 48V), improving overall efficiency. When EXTVCC is present above ~4.7V, the device automatically switches to EXTVCC sourcing; below that, it defaults to VIN sourcing - with seamless transition even during output short-circuit events.
Can the MAX17575ATC+T operate without an external soft-start capacitor?
No - the MAX17575ATC+T requires an external capacitor connected from SS to GND to initiate startup. Without it, the soft-start circuit cannot ramp the internal reference, and the device remains in reset state. Typical values range from 1nF (≈180µs) to 100nF (≈18ms); a 12nF capacitor yields ~2ms soft-start time per the datasheet equation tSS = CSS × 5.55 × 10⁶.
MAX17575ATC+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:
- 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+T FAQ
1.How can I place an order for MAX17575ATC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17575ATC+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 MAX17575ATC+T reliable?
The price and inventory of MAX17575ATC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17575ATC+T is usually 5 days.
3.What payment methods are accepted for MAX17575ATC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17575ATC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17575ATC+T?
MAX17575ATC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17575ATC+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 MAX17575ATC+T?
For technical support, including MAX17575ATC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17575ATC+T requirements.
6.How does Aetrix verify that MAX17575ATC+T is sourced from the original manufacturer or authorized distributors?
All MAX17575ATC+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 MAX17575ATC+T meets industry standards.
7.What is the process for return or replacement of MAX17575ATC+T?
All MAX17575ATC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17575ATC+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 MAX17575ATC+T part is unused and in its original packaging.
Return procedure for MAX17575ATC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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