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Analog Devices Inc./Maxim Integrated MAX17504ATP+T
- Part No.:
- MAX17504ATP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX17504ATP+T.pdf
- Description:
- IC REG BUCK ADJ 3.5A 20TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX17504ATP+T from Maxim Integrated is a high-efficiency, synchronous step-down DC-DC converter with dual integrated MOSFETs, operating from 4.5V to 60V input and delivering up to 3.5A at 0.9V–90% VIN output. It features peak-current-mode control, internal compensation, ±1.1% FB regulation accuracy over –40°C to +125°C, and a compact 20-pin TQFN (5mm × 5mm) package with exposed pad. It is used in industrial power supplies and high-voltage single-board systems.
For engineers reviewing the MAX17504ATP+T datasheet, MAX17504ATP+T pinout, MAX17504ATP+T application, or MAX17504ATP+T equivalent, key selection criteria include input voltage range (4.5–60V), output current capability (3.5A), MODE-selectable operation (PWM/PFM/DCM), programmable soft-start, and open-drain RESET functionality for system power sequencing.
Technical Context
The MAX17504ATP+T implements a peak-current-mode control architecture with selectable MODE pin logic (GND = PWM, open = PFM, VCC = DCM) to optimize efficiency across load conditions. Its internal compensation eliminates external loop components across the full 0.9V–90% VIN output range, enabling stable regulation without tuning.
It integrates a 5V LDO (VCC) with 4.75–5.25V output and 100mA current limit, supports external frequency synchronization (1.1× to 1.4× RRT-set fSW), and provides hiccup-mode overcurrent protection with runaway and valley current limits. The device operates reliably from –40°C to +125°C ambient with thermal shutdown at +165°C.
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. |
| Output Current | Up to 3.5A continuous - sufficient for point-of-load regulation of FPGAs, ASICs, and microprocessors. |
| Feedback Accuracy | ±1.1% over –40°C to +125°C - ensures tight output regulation across extended temperature environments. |
| Switching Frequency | 100kHz to 2.2MHz (RRT-programmable) - enables optimization of size vs. EMI; supports external sync up to 1.4× set frequency. |
| Minimum On-Time | 135ns - allows high VIN-to-VOUT conversion ratios (e.g., 48V → 3.3V) without pulse-skipping instability. |
| Quiescent Current (PFM) | 118µA typical - extends battery life in always-on industrial monitoring nodes with light-load operation. |
| Shutdown Current | 2.8µA typical - minimizes standby power loss in energy-sensitive applications. |
Pinout & Package
MAX17504ATP+T is housed in a 20-pin, 5mm × 5mm TQFN package with exposed pad (Package Code: T2055+4, Outline Number: 21-0140), optimized for thermal performance via SGND-connected copper plane and thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,3 VIN | Power input supply | High-current input pins requiring local 2×2.2µF ceramic decoupling to PGND for stability and EMI reduction. |
| 4 EN/UVLO | Enable / input UVLO threshold control | Resistor-divider programmable turn-on threshold (1.19–1.24V rising); enables precise input rail sequencing. |
| 5 RESET | Open-drain power-good indicator | Asserts low when FB falls below 92% regulation; deasserts after 1024 cycles once FB rises above 95% - provides clean system reset timing. |
| 7 SS | Soft-start timing control | Capacitor-to-SGND sets ramp time; reduces inrush current during startup and prevents output overshoot. |
| 9 FB | Output voltage feedback sense | High-impedance input referenced to SGND; connects to resistor divider to set output from 0.9V to 90% VIN. |
| 10 RT | Frequency setting resistor node | Connects to SGND via resistor (e.g., 40.2kΩ for 500kHz); open-circuit defaults to 500kHz - simplifies design iteration. |
| 11 MODE | Control mode selection | GND = constant-frequency PWM; open = PFM (pulse skipping); VCC = DCM - enables dynamic efficiency optimization. |
| 12 VCC | Integrated 5V LDO output | Bypassed with 2.2µF ceramic; powers internal circuitry and can supply light external loads (≤25mA). |
| 13 SGND | Analog ground reference | Separate from PGND to minimize noise coupling into sensitive feedback and control circuits. |
| 14–16 PGND | Power ground return path | Low-inductance connection point for high di/dt switching currents; must be tied to SGND at VCC bypass capacitor. |
| 17–19 LX | Switching node | Connects directly to inductor; carries high dv/dt and di/dt - requires short, low-inductance layout to reduce EMI. |
| 20 BST | Bootstrap capacitor terminal | Requires 0.1µF ceramic between BST and LX to drive high-side MOSFET gate above VIN during conduction. |
Key Features
| Feature | Design Value |
|---|---|
| All-ceramic capacitor solution | Enables ultra-compact PCB layout with as few as eight external components - reduces BOM count and board area. |
| Internal compensation | Eliminates need for external compensation network across entire output voltage range - accelerates design cycle and improves robustness. |
| Three-mode control (PWM/PFM/DCM) | Allows trade-off between light-load efficiency (PFM), EMI predictability (PWM), and mid-load balance (DCM) - no hardware change required. |
| Programmable EN/UVLO threshold | Resistor-divider configuration enables precise input voltage turn-on - critical for multi-rail sequencing in industrial controllers. |
| Hiccup-mode overcurrent protection | Autoretry startup after fault clears - prevents latch-up during transient overloads while maintaining system reliability. |
| Pre-biased power-up support | Enables safe startup into precharged output capacitors - avoids reverse current flow in hot-swap or redundant supply applications. |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
|
Use Scenario: Primary DC-DC conversion in programmable logic controllers (PLCs) and motor drives powered from 24V or 48V bus rails. IC Role / Device Role / Timing Role: Main step-down regulator delivering 3.3V/5V/12V to I/O modules, communication interfaces, and microcontrollers. Use Value: Wide 4.5–60V input accommodates brownout and surge conditions; hiccup-mode OCP ensures resilience against short-circuited field wiring. |
Use Scenario: Local regulation on dense PCBs where centralized 12V or 24V rail feeds multiple subsystems. IC Role / Device Role / Timing Role: Point-of-load (POL) converter supplying FPGA core voltage (e.g., 0.9V) or memory interface rails (1.2V/1.8V). Use Value: Internal compensation and all-ceramic design enable small footprint; 3.5A output supports high-performance logic without external heatsinking. |
| Base Station Power Supplies | Wall Transformer Regulation |
|
Use Scenario: Intermediate bus conversion in 5G remote radio units (RRUs) operating from -48V telecom supply. IC Role / Device Role / Timing Role: High-efficiency buck stage stepping -48V to +12V or +5V for RF front-end bias and digital control circuitry. Use Value: 60V absolute max rating and 135ns min on-time allow direct use with -48V input (with proper level-shifting); PFM mode maintains >85% efficiency at 10mA load. |
Use Scenario: Secondary-side regulation in universal-input AC/DC adapters replacing linear regulators or discrete buck solutions. IC Role / Device Role / Timing Role: Final-stage DC-DC converter delivering regulated 5V/9V/12V USB-C PD or legacy wall adapter outputs. Use Value: 3.5A capability supports fast-charging protocols; programmable soft-start prevents inrush tripping of upstream AC/DC controller. |
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 | 4.5–65V input, 3.5A, but uses external compensation and requires Schottky catch diode in non-synchronous mode; no MODE pin for PFM/DCM selection. | Lacks integrated PFM/DCM modes and internal compensation - increases design complexity and component count for light-load efficiency optimization. | Choose LM5164QPWPRQ1 only if AEC-Q100 automotive qualification is mandatory; otherwise MAX17504ATP+T offers simpler layout and better light-load behavior. |
| TPS54360BDDAR | 4.5–60V input, 3.5A, but fixed 500kHz frequency, no MODE pin, higher IQ (146µA PFM), and no internal VCC LDO - requires external bias supply. | Missing programmable frequency, soft-start, and RESET functions - limits flexibility in EMI-sensitive or sequenced-power systems. | TPS54360BDDAR suits cost-sensitive designs where fixed-frequency operation and minimal feature set are acceptable; MAX17504ATP+T delivers superior integration and configurability. |
Compared with LM5164QPWPRQ1 and TPS54360BDDAR, the MAX17504ATP+T provides unique integration of internal compensation, three-mode control, and a dedicated RESET output - reducing external component count by up to 40% and enabling faster time-to-market for industrial and telecom power designs.
Availability
MAX17504ATP+T 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 RoHS-compliant packaging.
Supply support for MAX17504ATP+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, communications, and computing applications.
The MAX17504 product line targets high-input-voltage, high-reliability DC-DC conversion in harsh environments - emphasizing wide VIN range, internal integration, and robust protection features for industrial and telecom infrastructure.
FAQ
What is the maximum input voltage rating for the MAX17504ATP+T?
The MAX17504ATP+T has an absolute maximum input voltage rating of +65V (VIN to PGND), with recommended continuous operation up to 60V. This allows reliable use in 48V industrial systems with transient surges, and compatibility with telecom -48V supplies when properly referenced. Exceeding 60V continuously may impact long-term reliability despite the 65V absolute limit.
Does the MAX17504ATP+T require external compensation components?
No, the MAX17504ATP+T features built-in compensation that remains stable across its full output voltage range (0.9V to 90% VIN). This eliminates the need for external Type-II or Type-III compensation networks, reducing component count and layout sensitivity while maintaining phase margin >58° per Bode plot data.
How does the MODE pin configure operating modes in the MAX17504ATP+T?
The MODE pin selects among three control schemes: connect to SGND for constant-frequency PWM (all loads), leave open for PFM (pulse skipping at light loads), or connect to VCC for DCM (discontinuous conduction mode). Each mode is validated in the datasheet with efficiency curves and transient response plots - no firmware or external logic is needed.
What is the purpose of the RESET pin on the MAX17504ATP+T?
The open-drain RESET pin on the MAX17504ATP+T asserts low when the FB voltage drops below 92% of regulation, indicating output undervoltage. It deasserts 1024 switching cycles after FB rises above 95%, providing a clean, glitch-free power-good signal for microcontroller reset sequencing or FPGA configuration enable.
Can the MAX17504ATP+T operate with a pre-biased output?
Yes, the MAX17504ATP+T supports pre-biased power-up, verified in Figure 16a–17a of the datasheet. When enabled into a precharged output, it avoids reverse current flow by controlling gate drive timing - making it suitable for hot-swap, redundant supply, and OR-ing applications without external diodes or controllers.
MAX17504ATP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 20-WQFN 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:
- 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+T FAQ
1.How can I place an order for MAX17504ATP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17504ATP+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 MAX17504ATP+T reliable?
The price and inventory of MAX17504ATP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17504ATP+T is usually 5 days.
3.What payment methods are accepted for MAX17504ATP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17504ATP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17504ATP+T?
MAX17504ATP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17504ATP+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 MAX17504ATP+T?
For technical support, including MAX17504ATP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17504ATP+T requirements.
6.How does Aetrix verify that MAX17504ATP+T is sourced from the original manufacturer or authorized distributors?
All MAX17504ATP+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 MAX17504ATP+T meets industry standards.
7.What is the process for return or replacement of MAX17504ATP+T?
All MAX17504ATP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17504ATP+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 MAX17504ATP+T part is unused and in its original packaging.
Return procedure for MAX17504ATP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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