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Analog Devices Inc./Maxim Integrated MAX17506ATP+T
- Part No.:
- MAX17506ATP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX17506ATP+T.pdf
- Description:
- IC REG BUCK ADJ 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:200
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Product details
Overview
The MAX17506ATP+T from Maxim Integrated is a high-efficiency, synchronous step-down DC-DC converter with integrated high-side MOSFET, operating from 4.5V to 60V input and delivering up to 5A output current. It supports adjustable output voltages from 0.9V to 90% of VIN, features ±1.4% FB regulation accuracy over –40°C to +125°C, and uses peak current-mode control. It is widely deployed in industrial power supplies and high-voltage single-board systems requiring robust, wide-input regulation.
For engineers reviewing the MAX17506ATP+T datasheet, MAX17506ATP+T pinout, MAX17506ATP+T application, or MAX17506ATP+T equivalent, key selection considerations include its 20-pin TQFN package, programmable 100kHz–2.2MHz switching frequency, PFM/DCM/PWM mode flexibility, internal compensation, and DL-to-LX short detection for reliable overload protection.
Technical Context
The MAX17506ATP+T implements peak current-mode control with an internal transconductance error amplifier, slope compensation generator, and PWM comparator. Its architecture enables stable regulation across wide input/output ranges while supporting monotonic startup into prebiased loads and hiccup-mode overcurrent protection.
It integrates dual LDOs (VIN-fed and EXTVCC-fed) for VCC generation, with automatic switchover at ~4.7V; the auxiliary bootstrap LDO improves efficiency at high VIN. The MODE/SYNC pin latches at power-up to select PWM (GND), PFM (open), or DCM (VCC) operation-mode changes are ignored during runtime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and telecom supply rails without external pre-regulation. |
| Output Current | Up to 5A continuous - sufficient for point-of-load regulation in FPGA, DSP, and ASIC power domains. |
| Feedback Accuracy | ±1.4% over –40°C to +125°C - ensures tight output voltage tolerance across full industrial temperature range. |
| Switching Frequency | 100kHz to 2.2MHz (programmable via RT resistor) - enables EMI optimization and compact magnetics selection. |
| Efficiency Peak | >95% - minimizes thermal stress and system power loss in space-constrained designs. |
| Shutdown Current | 3.5µA - enables ultra-low-power standby in battery-backed or energy-sensitive applications. |
| Operating Temperature | –40°C to +125°C ambient / +150°C junction - qualified for harsh industrial and base station environments. |
Pinout & Package
Package: 20-pin, 5mm × 5mm Thin QFN (TQFN) with exposed pad (EP); RoHS-compliant, thermal resistance θJA = 23°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2,14,15) | Power input supply | High-current input node; must be decoupled with two 2.2µF ceramics close to PGND for stability and EMI reduction. |
| PGND (Pin 3) | Power ground return | Low-impedance path for high di/dt LX current; connects externally to power ground plane and ties to SGND at VCC bypass cap. |
| VCC (Pin 4) | Internal 5V LDO output | Powers internal logic and low-side driver; requires 2.2µF ceramic bypass to SGND; sourced from VIN or EXTVCC automatically. |
| MODE/SYNC (Pin 5) | Control mode selection & sync input | Latched at startup: GND = PWM, open = PFM, VCC = DCM; also accepts external clock (1.1–1.4× fSW) for synchronization. |
| RESET (Pin 6) | Open-drain fault indicator | Asserts low when FB falls below 92.2% of set value; deasserts after 1024 cycles once FB rises above 95.6% - enables system-level power sequencing. |
| RT (Pin 7) | Frequency programming input | Resistor-to-SGND sets fSW; open = 450kHz default; enables precise EMI tuning and layout optimization. |
| SGND (Pin 8) | Analog reference ground | Reference for FB, CF, SS, EN/UVLO; must be star-connected to PGND at VCC capacitor to minimize noise coupling. |
| CF (Pin 9) | Loop compensation node | Capacitor-to-FB required only for fSW < 450kHz; eliminates need for external compensation network across full VOUT range. |
| FB (Pin 10) | Feedback input | Connects to resistor divider from VOUT; internal 0.9V reference enables output setting from 0.9V to 0.9×VIN. |
| EXTVCC (Pin 11) | External VCC supply input | Accepts 4.84V–24V to power VCC from output rail, bypassing VIN LDO - improves efficiency at high input voltages. |
| SS (Pin 12) | Soft-start timing input | Capacitor-to-SGND controls ramp rate; ensures monotonic startup and prevents inrush into prebiased loads. |
| EN/UVLO (Pin 13) | Enable and input UVLO threshold | Rising threshold 1.215V ±25mV; programmable turn-on point via resistor divider from VIN - supports custom brown-in/out behavior. |
| BST (Pin 16) | Bootstrap capacitor connection | Connects 0.1µF ceramic to LX; supplies gate drive for high-side MOSFET - critical for proper high-side conduction. |
| LX (Pins 17,18,19) | Switching node | High-di/dt node connected to inductor; multiple pins reduce parasitic inductance and improve thermal dissipation. |
| DL (Pin 20) | Low-side gate driver output | Drives external n-MOSFET gate; resistor to SGND selects peak/runaway current limits and hiccup vs latchoff response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | 45mΩ typical RDS(on) - eliminates external high-side switch and associated gate-drive complexity. |
| Internal loop compensation | Single-resistor (RT) + optional CF capacitor - removes need for external compensation network across full VOUT range. |
| Three selectable control modes | PWM (constant frequency), PFM (pulse-skipping), DCM (discontinuous conduction) - optimizes efficiency across load spectrum. |
| DL-to-LX short detection | Dedicated circuitry monitors DL/LX voltage differential - provides fast, reliable protection against low-side FET failure or PCB shorts. |
| Programmable EN/UVLO threshold | Adjustable via resistor divider on EN/UVLO pin - enables custom input voltage sequencing and brownout recovery behavior. |
| Monotonic startup into prebiased output | Active soft-start control prevents reverse current flow - essential for hot-swap and multi-rail systems with powered-backup rails. |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
|
Use Scenario: Central 48V bus powering multiple isolated or non-isolated DC-DC stages in PLCs, motor drives, and I/O modules. IC Role / Device Role: Primary non-isolated buck regulator converting 48V to 5V/3.3V for microcontrollers, sensors, and communication interfaces. Use Value: Wide 4.5V–60V input handles line transients and brownouts; 5A output supports multiple downstream rails; PFM mode extends efficiency at partial load. |
Use Scenario: Local regulation on dense PCBs where centralized PSUs feed intermediate bus voltages (e.g., 12V or 24V) to point-of-load converters. IC Role / Device Role: High-efficiency, compact buck converter placed near FPGA or SoC to minimize IR drop and noise coupling. Use Value: 5mm × 5mm TQFN package enables high-density placement; internal compensation reduces BOM count; EXTVCC option improves efficiency at high VIN. |
| Base Station Power Supplies | Wall Transformer Regulation |
|
Use Scenario: Remote radio unit (RRU) or small-cell base station requiring regulated 5V/3.3V from -48V telecom supply or 24V PoE-derived rail. IC Role / Device Role: High-reliability buck converter handling wide input variation and transient surges common in outdoor telecom infrastructure. Use Value: –40°C to +125°C operation ensures field reliability; hiccup-mode OCP prevents thermal runaway during antenna fault conditions; RESET signal enables system fault logging. |
Use Scenario: AC/DC adapter replacement in consumer or medical devices where offline transformer output (e.g., 12V–36V DC) feeds a final regulation stage. IC Role / Device Role: Efficient, low-noise buck converter generating clean 5V/3.3V for USB peripherals, displays, or embedded controllers. Use Value: 95%+ peak efficiency reduces heat in enclosed enclosures; all-ceramic capacitor support simplifies layout; soft-start prevents inrush tripping upstream fuses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 3.5A output, no integrated high-side FET (external), fixed 100kHz–2.2MHz freq, no PFM/DCM mode | Requires external high-side MOSFET and gate driver; less suited for space-constrained designs needing full integration | Choose when higher input voltage margin (>60V) or AEC-Q100 qualification is required; not drop-in due to different pinout and external FET dependency |
| MPQ4313-AEC1 | 4.5V–60V input, 5A output, integrated FET, but only PWM mode (no PFM/DCM), ±2% FB accuracy, smaller 4mm × 4mm QFN | Lacks light-load efficiency optimization; lower FB accuracy impacts precision regulation at temperature extremes | Prefer when footprint is critical and light-load efficiency is secondary; not functionally equivalent due to missing PFM/DCM and reduced accuracy |
Compared with LM5164QPWPRQ1 and MPQ4313-AEC1, the MAX17506ATP+T uniquely combines integrated high-side FET, triple-mode control (PWM/PFM/DCM), ±1.4% FB accuracy over full temperature range, and DL-to-LX short detection - making it optimal for industrial and telecom applications demanding both efficiency breadth and fault resilience.
Availability
MAX17506ATP+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 guaranteed traceable sourcing.
Supply support for MAX17506ATP+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX17506 belongs to Maxim's high-voltage, high-efficiency DC-DC converter product line, designed specifically for rugged industrial and telecom power conversion where wide input range, high reliability, and minimal external components are critical.
FAQ
What is the maximum output current capability of the MAX17506ATP+T?
The MAX17506ATP+T delivers up to 5A continuous output current under typical thermal conditions (4-layer PCB, 70°C ambient). Its peak current-limit threshold is programmable between 5.85A and 9.1A depending on the DL resistor value, enabling design flexibility for overload protection tailoring. The device maintains this rating across its full –40°C to +125°C operating temperature range, with thermal shutdown activating at +165°C junction temperature.
Does the MAX17506ATP+T require external compensation components?
No, the MAX17506ATP+T features internal compensation that eliminates the need for external Type-II or Type-III compensation networks across its entire output voltage range (0.9V to 0.9×VIN). Only a single capacitor from CF to FB is required when operating below 450kHz; at 450kHz or higher, the CF pin is left open. This significantly reduces design complexity and BOM count compared to traditional controllers.
How does the MODE/SYNC pin affect MAX17506ATP+T operation?
The MODE/SYNC pin is latched at power-up to configure control mode: grounded = constant-frequency PWM, open = PFM (pulse-skipping), connected to VCC = DCM (discontinuous conduction). It also accepts external clock signals (1.1–1.4× fSW) for synchronization. Mode changes during operation are ignored - ensuring stable behavior during dynamic load or system reconfiguration events.
Can the MAX17506ATP+T operate with a prebiased output?
Yes, the MAX17506ATP+T supports monotonic startup into prebiased outputs via its controlled soft-start circuitry. When the SS pin is driven by an external capacitor, the internal soft-start ramp begins from zero regardless of initial output voltage, preventing reverse current flow through the inductor or load. This is confirmed in typical operating characteristics (TOC16/TOC17) and explicitly stated in the Detailed Description section.
What protection features are built into the MAX17506ATP+T?
The MAX17506ATP+T integrates hiccup-mode overload protection, DL-to-LX short detection, overtemperature shutdown (+165°C with 10°C hysteresis), programmable EN/UVLO, built-in output voltage monitoring with open-drain RESET, and minimum on/off time limits (95ns/140ns). These features collectively ensure robust operation in adverse industrial environments without requiring external protection circuitry.
MAX17506ATP+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:
- -
- 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)
MAX17506ATP+T FAQ
1.How can I place an order for MAX17506ATP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17506ATP+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 MAX17506ATP+T reliable?
The price and inventory of MAX17506ATP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17506ATP+T is usually 5 days.
3.What payment methods are accepted for MAX17506ATP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17506ATP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17506ATP+T?
MAX17506ATP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17506ATP+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 MAX17506ATP+T?
For technical support, including MAX17506ATP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17506ATP+T requirements.
6.How does Aetrix verify that MAX17506ATP+T is sourced from the original manufacturer or authorized distributors?
All MAX17506ATP+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 MAX17506ATP+T meets industry standards.
7.What is the process for return or replacement of MAX17506ATP+T?
All MAX17506ATP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17506ATP+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 MAX17506ATP+T part is unused and in its original packaging.
Return procedure for MAX17506ATP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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