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Analog Devices Inc./Maxim Integrated MAX17504ATP+
- Part No.:
- MAX17504ATP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX17504ATP+.pdf
- Description:
- IC REG BUCK ADJ 3.5A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,411
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Product details
Overview
MAX17504ATP+ from Maxim Integrated is a high-efficiency, 4.5V–60V input, synchronous step-down DC-DC converter with dual integrated MOSFETs, delivering up to 3.5A output current and supporting 0.9V to 90% VIN adjustable output voltage. It features internal compensation, ±1.1% FB regulation accuracy over –40°C to +125°C, and operates in PWM/DCM/PFM modes for optimized efficiency across load conditions. Used in industrial power supplies and high-voltage single-board systems.
For engineers reviewing the MAX17504ATP+ datasheet, MAX17504ATP+ pinout, MAX17504ATP+ application, or MAX17504ATP+ equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (PWM/DCM/PFM), exact package mapping (20-pin TQFN, 5mm × 5mm), and two rigorously cross-checked alternative parts for point-of-load design.
Technical Context
The MAX17504ATP+ employs peak-current-mode control with programmable MODE pin selection-GND for constant-frequency PWM, open for pulse-skipping PFM, and VCC for DCM-to balance light-load efficiency and EMI performance. Its internal 5V LDO (VCC) powers gate drivers and logic, with 4.75V–5.25V output and 26.5mA–100mA current limit.
It integrates high-side (165mΩ typ) and low-side (80mΩ typ) nMOSFETs, supports external frequency synchronization (1.1× to 1.4× fSW), and delivers hiccup-mode overcurrent protection with 4.4A–5.85A peak current limit and thermal shutdown at 165°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - Enables direct regulation from 12V, 24V, 36V, and 48V industrial rails without pre-regulation. |
| Output Current | Up to 3.5A continuous - Sustains full rated load over –40°C to +125°C ambient temperature. |
| Feedback Accuracy | ±1.1% over –40°C to +125°C - Ensures stable output voltage under wide thermal and line variations. |
| Switching Frequency | 100kHz to 2.2MHz (adjustable via RT resistor or SYNC) - Supports compact magnetics and EMI optimization. |
| Efficiency Peak | >90% - Achieved at mid-load in PWM mode (e.g., 3.3V/2A @ VIN=24V), reducing thermal stress. |
| Shutdown Current | 2.8µA typical - Minimizes system standby power in battery-backed or always-on applications. |
| Package | 20-pin TQFN (5mm × 5mm, exposed pad) - Provides low θJA = 30°C/W for high-power density layouts. |
Pinout & Package
MAX17504ATP+ is housed in a RoHS-compliant, lead-free 20-pin TQFN package (5mm × 5mm, outline 21-0140) with an exposed thermal pad connected to SGND. The package supports multilayer PCB thermal management via thermal vias under the EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 - VIN | Power input supply | Accepts 4.5V–60V; must be decoupled with two 2.2µF ceramics close to pins to suppress high-frequency ripple. |
| 4 - EN/UVLO | Enable / input UVLO threshold control | Resistor-divider programmable turn-on threshold (1.19V–1.24V rising); enables precise input rail sequencing. |
| 5 - RESET | Open-drain power-good indicator | Asserts low when FB falls below 92% of setpoint; deasserts after 1024 cycles once FB rises above 95%. |
| 7 - SS | Soft-start timing control | Capacitor-to-SGND sets ramp time; reduces inrush current during startup and supports pre-biased output. |
| 9 - FB | Output voltage feedback input | Monitors resistive divider output; regulates to 0.9V reference (±1.1%) for accurate VOUT setting. |
| 11 - MODE | Control mode selection | GND = PWM (constant fSW), open = PFM (pulse skipping), VCC = DCM (no skipping, no reverse inductor current). |
| 12 - VCC | Integrated 5V LDO output | Powers internal circuitry and gate drivers; requires 2.2µF ceramic bypass to SGND for stability. |
| 13 - SGND | Analog ground reference | Separate from PGND; connects to VCC bypass cap ground and EP to minimize noise coupling into feedback path. |
| 14–16 - PGND | Power ground return | High-current return path for LX switching node and input/output capacitors; must tie to SGND at VCC cap. |
| 17–19 - LX | Switching node | Connects directly to inductor; carries high di/dt; layout critical for EMI and efficiency. |
| 20 - BST | Bootstrap capacitor connection | Requires 0.1µF ceramic between BST and LX to drive high-side MOSFET gate above VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Internal compensation | Eliminates external compensation network across entire 0.9V–90% VIN output range, reducing BOM count and layout sensitivity. |
| All-ceramic solution | Supports full design with as few as eight external components (including input/output caps, inductor, RT, SS, FB divider), enabling ultra-compact footprint. |
| Three selectable operation modes | PWM (fixed fSW), PFM (light-load pulse skipping), and DCM (no skipping, no reverse current) - allows dynamic trade-off between efficiency, noise, and transient response. |
| Programmable soft-start & pre-biased start-up | SS capacitor sets ramp time; supports safe startup into pre-charged outputs without damaging downstream loads. |
| Built-in power-good monitoring | RESET pin provides delayed, glitch-immune indication of valid regulation - eliminates need for external supervisor IC. |
| Hiccup-mode overcurrent protection | Auto-retry current limiting with 32768-cycle timeout prevents thermal runaway during sustained overload or short-circuit events. |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
Use Scenario: Central 48V bus powering multiple isolated or non-isolated point-of-load converters in PLC or motor drive cabinets. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 48V to 3.3V/5V/12V for FPGA, MCU, and I/O interfaces. Use Value: 60V max input withstands transients on industrial buses; 3.5A output supports multi-rail local regulation without external pass devices. |
Use Scenario: Local voltage conversion on high-density PCBs where space-constrained modules require clean, efficient 3.3V from 12V/24V backplane. IC Role / Device Role / Timing Role: Compact, self-contained buck converter with integrated FETs and compensation, minimizing external component count. Use Value: All-ceramic design and 5mm × 5mm TQFN enable ≤1 cm² solution size; DCM mode maintains >85% efficiency at 10mA–100mA loads. |
| Base Station Power Supplies | Wall Transformer Regulation |
Use Scenario: Intermediate 12V or 24V rail generation in 4G/5G remote radio units (RRUs) operating in outdoor enclosures. IC Role / Device Role / Timing Role: High-reliability buck converter handling wide ambient (-40°C to +85°C) and input voltage variation (e.g., 36V–57V telecom rectified input). Use Value: ±1.1% FB accuracy and 165°C thermal shutdown ensure stable operation under thermal stress; hiccup-mode protects against antenna fault-induced shorts. |
Use Scenario: AC/DC adapter secondary-side regulation replacing linear regulators or discrete buck controllers in consumer/medical wall adapters. IC Role / Device Role / Timing Role: Efficient, low-noise buck controller accepting wide-input DC (e.g., 12V–36V from primary-side flyback) to deliver regulated 5V/3.3V. Use Value: PFM mode achieves >75% efficiency at 10mA load, extending standby compliance; EN/UVLO enables brown-out detection and graceful shutdown. |
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 |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 3.5A, 1.2MHz fixed fSW, no MODE pin; requires external compensation; lower quiescent current (15µA) | Lacks PFM/DCM mode flexibility; better suited for fixed-frequency, low-IQ automotive applications requiring AEC-Q100 Grade 1 | Select LM5164QPWPRQ1 when AEC-Q100 qualification and minimal standby power are mandatory, and fixed 1.2MHz operation is acceptable. |
| TPS54360BDDAR | 3.5V–60V input, 3.5A, 100kHz–2.5MHz adjustable fSW, Eco-mode™ (similar to PFM), but no DCM option; external compensation required | Higher minimum input voltage (3.5V vs. 4.5V); Eco-mode lacks DCM's controlled light-load behavior; less accurate FB (±1.5%) | Choose TPS54360BDDAR when cost-sensitive designs accept slightly lower FB accuracy and do not require DCM's precise light-load control. |
Compared with LM5164QPWPRQ1 and TPS54360BDDAR, the MAX17504ATP+ uniquely combines internal compensation, three distinct control modes (PWM/DCM/PFM), and ±1.1% FB accuracy in a 5mm × 5mm TQFN - enabling smaller, more flexible, and thermally robust point-of-load designs without sacrificing precision or configurability.
Availability
MAX17504ATP+ is available at Aetrix Electronics and suitable for industrial power supplies, distributed supply regulation, and base station power supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX17504ATP+ 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 demanding industrial, communications, and computing applications.
The MAX17504ATP+ belongs to Maxim's high-voltage synchronous buck converter product line, engineered for rugged, compact, and efficient DC-DC conversion in 4.5V–60V input environments with minimal external components.
FAQ
What is the maximum input voltage rating for the MAX17504ATP+?
The MAX17504ATP+ has an absolute maximum input voltage (VIN to PGND) of +65V, with recommended continuous operation up to 60V. This 60V rating allows reliable use with 48V industrial and telecom rails, including transient surges per IEC 61000-4-5 Level 3 (±1kV). Exceeding 60V continuously may reduce lifetime reliability.
Does the MAX17504ATP+ require external compensation components?
No, the MAX17504ATP+ features built-in compensation across its full output voltage range (0.9V to 90% VIN), eliminating the need for external Type-II or Type-III compensation networks. This simplifies design, improves stability margin consistency, and reduces bill-of-materials count by up to four passive components compared to uncompensated controllers.
How does the MODE pin configure operation modes on the MAX17504ATP+?
The MODE pin on the MAX17504ATP+ selects among three control schemes: connect to SGND for PWM (constant switching frequency), leave open for PFM (pulse skipping at light loads), or connect to VCC for DCM (discontinuous conduction mode with no pulse skipping but disabled reverse inductor current). Each mode is validated in the datasheet with efficiency curves and transient waveforms.
What is the function of the RESET pin on the MAX17504ATP+?
The RESET pin on the MAX17504ATP+ is an open-drain output that signals power-good status: it pulls low when the FB voltage drops below 92% of its target (e.g., <0.828V for 3.3V output), and releases high 1024 clock cycles after FB rises above 95% (e.g., >0.945V). This provides glitch-immune, delay-stabilized system reset signaling without external supervision circuitry.
Can the MAX17504ATP+ operate with a pre-biased output during startup?
Yes, the MAX17504ATP+ supports pre-biased output startup when the MODE pin is configured for PWM (MODE = SGND) and soft-start is enabled. During startup, the controller actively sinks current from the SS pin to prevent reverse current flow into the output capacitor, avoiding potential damage to downstream loads or upstream sources.
MAX17504ATP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 20-WQFN 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:
- 3.5A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX17504ATP+ FAQ
1.How can I place an order for MAX17504ATP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17504ATP+ 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 MAX17504ATP+ reliable?
The price and inventory of MAX17504ATP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17504ATP+ is usually 5 days.
3.What payment methods are accepted for MAX17504ATP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17504ATP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17504ATP+?
MAX17504ATP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17504ATP+ 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 MAX17504ATP+?
For technical support, including MAX17504ATP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17504ATP+ requirements.
6.How does Aetrix verify that MAX17504ATP+ is sourced from the original manufacturer or authorized distributors?
All MAX17504ATP+ 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 MAX17504ATP+ meets industry standards.
7.What is the process for return or replacement of MAX17504ATP+?
All MAX17504ATP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17504ATP+, 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 MAX17504ATP+ part is unused and in its original packaging.
Return procedure for MAX17504ATP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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