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Analog Devices Inc./Maxim Integrated MAX17509ATJ+
- Part No.:
- MAX17509ATJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX17509ATJ+.pdf
- Description:
- IC REG BUCK ADJ 3A DL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,541
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Product details
Overview
The MAX17509ATJ+ from Maxim Integrated is a dual-channel, valley-current-mode synchronous step-down DC-DC converter integrating two 3A internal-switch regulators. It operates from 4.5V to 16V input, delivers independently programmable outputs (0.904V–3.782V and 4.756V–5.048V), achieves ±2% system output accuracy over temperature and load, and supports dual-phase 6A single-output configuration for FPGA core power.
For engineers reviewing the MAX17509ATJ+ datasheet, MAX17509ATJ+ pinout, MAX17509ATJ+ application, or MAX17509ATJ+ equivalent, key selection considerations include resistor-programmable output voltage (20mV resolution), adjustable LX slew rate for EMI mitigation, dual-phase synchronization capability, and integrated OV/UV/OC/OT protection with hiccup/latch-selectable fault response.
Technical Context
The MAX17509ATJ+ implements valley-current-mode PWM control with self-configured internal compensation-eliminating external loop components-and supports selectable switching frequencies (500kHz/1MHz/1.5MHz/2MHz) with 0° or 180° inter-regulator phase shift. Its resistor-programmable architecture uses seven dedicated pins (MODE, SS1/SS2, COARSE1/2, FINE1/2) to configure topology, protection behavior, soft-start timing, and slew rate without firmware.
Each regulator features independent enable (EN1/EN2), open-drain power-good (PGOOD1/PGOOD2), and thermal shutdown (160°C threshold, 20°C hysteresis). The device integrates a 4.5V LDO (VCC) powered from IN1, supplying gate drivers and analog circuitry via AVCC, with UVLO thresholds of 4.2V (rising) and 3.4V (falling) on VIN and 3.9V/3.2V on AVCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - supports wide industrial and telecom supply rails without pre-regulation |
| Output Current Capability | Two independent 3A outputs or one dual-phase 6A output - enables flexible POL architecture scaling |
| Output Voltage Ranges | 0.904V–3.782V and 4.756V–5.048V in 20mV steps - covers FPGA core, I/O, and auxiliary rail requirements |
| System Output Accuracy | ±2% over line, load, and -40°C to +125°C - ensures stable regulation under real-world thermal and loading conditions |
| Switching Frequency Options | 500kHz/1MHz/1.5MHz/2MHz - allows optimization of efficiency vs. size for ceramic-capacitor-only designs |
| Thermal Shutdown Threshold | 160°C with 20°C hysteresis - provides robust overtemperature protection while avoiding nuisance shutdowns |
| High-Side/Low-Side RDS(on) | 50mΩ typical each - minimizes conduction loss and improves full-load efficiency at 3A |
Pinout & Package
The MAX17509ATJ+ is housed in a thermally enhanced 32-pin 5mm × 5mm TQFN package with exposed paddle (EP) for improved heat dissipation. Pin assignment is optimized for dual-buck layout separation, with dedicated PGND1/PGND2 planes and isolated LX1/LX2 nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 / OUT2 | Feedback sense node | Direct connection to respective output voltage for precision regulation; requires Kelvin sensing for best accuracy |
| IN1 / IN2 | Main power input for each regulator | Bypassed separately with 10µF + 0.1µF ceramic capacitors near pins to suppress high-frequency noise |
| LX1 / LX2 | Switch-node connection | Drives external inductor; slew rate programmable via SS2 to reduce EMI in RF-sensitive systems |
| PGOOD1 / PGOOD2 | Open-drain power-good indicator | Signals regulation status with 15% window; requires external 10kΩ pull-up to logic-compatible voltage ≤5.5V |
| EN1 / EN2 | Independent enable inputs | 1.262V threshold with 250mV hysteresis; supports resistor-divider UVLO programming or direct AVCC tie |
| MODE / SS1 / SS2 / COARSE1/2 / FINE1/2 | Resistor-programmable configuration interface | Seven pins define topology, frequency, phase, OCP mode, soft-start time, and output voltage with 4-bit resolution |
| SYNC | External clock synchronization input | Accepts 450kHz–2.2MHz clock; enables deterministic timing across multiple converters in dense PCB layouts |
| EP | Exposed thermal pad | Must be soldered to large SGND copper plane; primary thermal path for 1.7°C/W junction-to-case resistance |
Key Features
| Feature | Design Value |
|---|---|
| All-ceramic capacitor design | Eliminates electrolytic/POSCAP requirements - reduces board area, improves lifetime, and enables compact POL solutions |
| Auto-configured internal compensation | Removes need for external compensation network - simplifies layout and eliminates stability tuning iterations |
| Programmable LX slew rate | Reduces high-frequency EMI emissions - critical for compliance with EN55022 Class B in FPGA/RF/audio systems |
| Selectable hiccup or brickwall overcurrent response | Enables safe short-circuit recovery (hiccup) or immediate shutdown (brickwall) based on system safety requirements |
| Prebias startup support | Allows controlled ramp-up into existing output voltage - prevents reverse current flow in hot-swap or multi-rail sequencing applications |
| Independent soft-start/soft-stop timing | Configurable rise/fall times (0.85ms–16ms per regulator) - enables precise power sequencing for ASIC/FPGA core-I/O ramp ordering |
Applications
| FPGA and DSP Core Power | Industrial Control Equipment |
|---|---|
Use Scenario: Powering 0.8V–1.2V core rails of Xilinx Kintex/Virtex or Intel Stratix FPGAs with tight transient response requirements. IC Role / Device Role / Timing Role: Dual-phase 6A buck regulator delivering low-noise, high-accuracy voltage with synchronized switching to minimize input ripple. Use Value: ±2% output accuracy and programmable slew rate ensure stable core operation during high-speed transceiver activity without violating VCCINT tolerance. | Use Scenario: Providing isolated 3.3V and 5V point-of-load supplies in PLC backplanes and motor drive controllers operating at -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Two independent 3A regulators powering I/O interfaces and microcontroller domains with separate enable/control. Use Value: -40°C to +125°C junction rating and robust OV/UV/OC/OT protection ensure continuous operation in uncontrolled industrial environments. |
| Multiple Point-of-Load (POL) Power Supplies | Base Station Point-of-Load Regulator |
Use Scenario: Generating distributed 1.8V, 2.5V, and 3.3V rails from a common 12V intermediate bus in 5G small-cell baseband boards. IC Role / Device Role / Timing Role: Resistor-programmable dual buck managing three distinct output voltages using shared input and ground resources. Use Value: 20mV output resolution and independent soft-start allow precise matching to ASIC voltage IDs while minimizing inrush on shared input bus. | Use Scenario: Supplying 1.0V/3.3V rails to RF front-end ICs and ADC/DACs in macrocell radio units subject to strict conducted/radiated EMI limits. IC Role / Device Role / Timing Role: Synchronized dual-phase buck with EN55022 Class B compliance achieved via slew-rate control and 180° phase shift. Use Value: Passes radiated emissions testing without ferrite beads or shielding - reducing BOM cost and board space in thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5143AQRHBTQ1 | Automotive-grade AEC-Q100 qualified; 3.5V–60V input; fixed 500kHz/1MHz/2.2MHz freq; no resistor-programmable VOUT | Designed for automotive infotainment and ADAS; lacks fine-resolution output programming and slew-rate control | Choose LM5143AQRHBTQ1 only when AEC-Q100 qualification and extended input range are mandatory |
| TPS546D24RQFR | PMBus-enabled; 4.5V–18V input; 0.5V–5.5V output; digital loop compensation; no slew-rate adjustment | Targeted at datacenter and telecom where telemetry, margining, and dynamic loop tuning are required | Choose TPS546D24RQFR when digital monitoring, remote configuration, or adaptive compensation outweighs analog simplicity |
Compared with LM5143AQRHBTQ1 and TPS546D24RQFR, the MAX17509ATJ+ uniquely combines resistor-based configurability, analog slew-rate control for EMI reduction, and ±2% system accuracy without requiring serial communication or external compensation - making it optimal for cost-sensitive, high-volume industrial and communications POL designs where analog flexibility and EMC performance are prioritized.
Availability
MAX17509ATJ+ is available at Aetrix Electronics and suitable for FPGA and DSP core power, industrial control equipment, and multiple point-of-load (POL) power supplies requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MAX17509ATJ+ 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 semiconductor solutions for industrial, communications, computing, and consumer markets.
The MAX17509ATJ+ belongs to Maxim's high-efficiency, resistor-programmable DC-DC converter product line, engineered specifically for compact, low-noise point-of-load regulation in FPGA, DSP, and telecom infrastructure where analog configurability and EMI control are critical.
FAQ
What is the maximum output voltage range supported by the MAX17509ATJ+?
The MAX17509ATJ+ supports two independent output voltage ranges: 0.904V to 3.782V and 4.756V to 5.048V, both with 20mV resolution enabled by its COARSE and FINE resistor-programming pins. These ranges cover standard FPGA core (0.8V–1.2V), I/O (1.8V–3.3V), and auxiliary (5V) rails. The ±2% system accuracy applies across the full range, load, line, and -40°C to +125°C temperature.
How does the MAX17509ATJ+ achieve EMI reduction without external filters?
The MAX17509ATJ+ reduces EMI through programmable LX switching node slew rate (via SS2 pin), 180° phase-shifted dual-phase operation, and optimized valley-current-mode control that minimizes switching noise. These features enable the device to pass EN55022 Class B radiated and conducted emissions standards using only ceramic capacitors and standard PCB layout-eliminating the need for ferrite beads or shielded inductors in most applications.
Can the MAX17509ATJ+ operate with prebiased outputs during startup?
Yes, the MAX17509ATJ+ supports prebias startup: when enabled, it ramps the internal reference voltage gradually without forcing reverse current into a precharged output. This behavior is active by default and requires no configuration. It ensures glitch-free power-up in systems with multiple power domains or hot-swap architectures where downstream rails may already be energized before the MAX17509ATJ+ begins regulation.
What protection features are integrated into the MAX17509ATJ+?
The MAX17509ATJ+ integrates comprehensive protection: input undervoltage lockout (VIN_UVLO) with hysteresis, output overvoltage (OV) and undervoltage (UV) detection, cycle-by-cycle overcurrent limiting, hiccup- or latch-off fault response, and thermal shutdown at 160°C with 20°C hysteresis. All protections are hardware-based and fully operational across the -40°C to +125°C junction temperature range without software intervention.
Is the MAX17509ATJ+ pin-compatible with other devices in the MAX175xx family?
No, the MAX17509ATJ+ is not pin-compatible with other MAX175xx devices such as the MAX17504 or MAX17536. Its 32-pin TQFN package, dual-LX architecture, and dedicated configuration pin layout (including separate SS1/SS2, COARSE1/2, FINE1/2) are unique to the MAX17509ATJ+. Substitution requires full schematic and layout review; resistor programming values and timing parameters also differ significantly between variants.
MAX17509ATJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.904V, 4.756V
- Voltage - Output (Max):
- 3.782V, 5.048V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz, 1MHz, 1.5MHz, 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX17509ATJ+ FAQ
1.How can I place an order for MAX17509ATJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17509ATJ+ 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 MAX17509ATJ+ reliable?
The price and inventory of MAX17509ATJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17509ATJ+ is usually 5 days.
3.What payment methods are accepted for MAX17509ATJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17509ATJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17509ATJ+?
MAX17509ATJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17509ATJ+ 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 MAX17509ATJ+?
For technical support, including MAX17509ATJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17509ATJ+ requirements.
6.How does Aetrix verify that MAX17509ATJ+ is sourced from the original manufacturer or authorized distributors?
All MAX17509ATJ+ 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 MAX17509ATJ+ meets industry standards.
7.What is the process for return or replacement of MAX17509ATJ+?
All MAX17509ATJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17509ATJ+, 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 MAX17509ATJ+ part is unused and in its original packaging.
Return procedure for MAX17509ATJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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