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Analog Devices Inc./Maxim Integrated MAX17541GATB+T
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- Part No.:
- MAX17541GATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17541GATB+T.pdf
- Description:
- IC REG BUCK ADJ 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,923
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Product details
Overview
MAX17541GATB+T from Maxim Integrated is a 42V input, 500mA synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, fixed 600kHz switching frequency, ±1.7% output voltage regulation accuracy over –40°C to +125°C, and built-in RESET monitoring for industrial power rails.
For engineers reviewing the MAX17541GATB+T datasheet, MAX17541GATB+T pinout, MAX17541GATB+T application, or MAX17541GATB+T equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and protection behavior, and real-world selection guidance for high-voltage point-of-load conversion in constrained industrial layouts.
Technical Context
The MAX17541GATB+T implements peak-current-mode control with internal transconductance error amplifier (GM = 590 µS typ), slope compensation, and cycle-by-cycle current limiting. It uses a fixed-frequency PWM architecture operating at 600 kHz across full load and temperature range.
Its integrated power stage features 0.85 Ω high-side pMOS and 0.35 Ω low-side nMOS on-resistance at +25°C, enabling >90% peak efficiency at 5V/500mA output. The device supports prebiased startup, hiccup-mode overload protection, and programmable EN/UVLO threshold (1.218 V typ rising) with 100 nA input leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 42V - supports wide industrial bus voltages including 24V and 36V rails without external regulators. |
| Output Current | Up to 500mA - sufficient for powering microcontrollers, sensors, and interface ICs in compact systems. |
| Switching Frequency | Fixed 600kHz - enables use of small 4.7µH inductors and reduces EMI filter size vs. lower-frequency converters. |
| Feedback Accuracy | ±1.7% over –40°C to +125°C - ensures stable regulation in harsh ambient conditions without calibration. |
| Shutdown Current | 0.9µA typ - minimizes battery drain in always-on industrial equipment during standby. |
| Thermal Shutdown | 165°C with 10°C hysteresis - protects against sustained overload while allowing recovery without manual reset. |
| RESET Threshold | 92.5% VOUT falling / 95.5% VOUT rising - provides precise power-good signaling for system sequencing. |
Pinout & Package
MAX17541GATB+T is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) connected to GND for thermal management. Pin pitch is 0.5mm; recommended PCB layout includes ≥6 thermal vias under EP tied to internal ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power Ground Return | Carries high pulsed inductor return current; must be routed separately from analog GND and joined only at VCC bypass capacitor. |
| VIN (Pin 2) | Main Input Supply | Accepts 4.5V–42V; requires local 1µF ceramic capacitor; absolute max rating is +48V. |
| EN/UVLO (Pin 3) | Enable & Input UVLO Control | Configurable turn-on threshold via resistor divider; 1.218V rising threshold enables reliable start-up on brownout-prone lines. |
| VCC (Pin 4) | Internal 5V LDO Output | Powers internal logic and gate drivers; requires 1µF ceramic bypass to GND; shuts down if VCC drops below 3.7V. |
| FB (Pin 5) | Feedback Input | Monitors output via resistive divider; 0.9V reference enables adjustable 0.9V–0.92×VIN output range. |
| SS (Pin 6) | Soft-Start Timing | Capacitor-to-GND sets ramp time; prevents inrush current into large output capacitors during power-up. |
| COMP (Pin 7) | Loop Compensation Node | Connects external RC network to stabilize control loop; required for adjustable-output configurations. |
| RESET (Pin 8) | Open-Drain Power-Good | Sinks 2mA when low; asserts after VOUT falls below 92.5%; releases 1024 clock cycles after VOUT rises above 95.5%. |
| GND (Pin 9) | Analog Ground Reference | Reference for FB, COMP, SS, RESET; kept separate from PGND until single-point connection at VCC capacitor. |
| LX (Pin 10) | Switching Node | Connects to inductor; high-impedance in shutdown; requires short, low-inductance trace to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | Eliminates need for external Schottky diode and reduces conduction losses by >30% vs. asynchronous designs. |
| All-Ceramic Capacitor Support | Enables ultra-compact 25mm² total solution size using only X7R MLCCs-no electrolytics required. |
| Hiccup-Mode Overcurrent Protection | Triggers after one runaway current limit event (0.78A typ), then suspends switching for 32,768 cycles to limit power dissipation. |
| Programmable EN/UVLO Threshold | Allows precise system-level brownout detection (e.g., 18V turn-on) using two external resistors-no external supervisor needed. |
| Built-In Output Monitoring (RESET) | Provides accurate, delay-compensated power-good signal referenced directly to FB voltage-not derived from VOUT sense line. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering 4–20mA transmitter modules and isolated ADCs in factory-floor PLC I/O cards. IC Role / Device Role / Timing Role: Primary 5V/500mA point-of-load regulator delivering clean, regulated supply from 24V industrial bus. Use Value: ±1.7% regulation accuracy ensures sensor measurement integrity; hiccup mode prevents thermal damage during field-wiring faults. | Use Scenario: Supplying HVAC controller MCUs, relay drivers, and environmental sensors in wall-mounted thermostats. IC Role / Device Role / Timing Role: High-efficiency buck converter generating stable 3.3V rail from variable 12–36V HVAC power bus. Use Value: 600kHz operation allows use of tiny 33µH inductors; -40°C to +125°C operation guarantees reliability in unconditioned attic or outdoor enclosures. |
| Base Station Power Management | Battery-Powered Test Equipment |
Use Scenario: Providing bias voltage to RF front-end amplifiers and clock buffers in small-cell base station remote radio units. IC Role / Device Role / Timing Role: Compact 42V-input step-down regulator supporting hot-swap and transient-heavy telecom power distribution. Use Value: 42V absolute max input withstands load-dump transients; RESET output sequences downstream FPGA configuration reliably. | Use Scenario: Powering portable oscilloscope front-ends and data acquisition circuits running from Li-ion or 12V sealed lead-acid batteries. IC Role / Device Role / Timing Role: Efficient 500mA buck converter enabling extended runtime while maintaining tight output tolerance during battery discharge. Use Value: 0.9µA shutdown current preserves battery life during storage; prebiased startup avoids output voltage collapse when powered into live rail. |
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 |
|---|---|---|---|
| LM5164QDRCRQ1 | Automotive-grade AEC-Q100 qualified; 65V max input; 300mA output; requires external MOSFETs. | Targeted for automotive infotainment and ADAS power rails-not optimized for industrial ambient temperature range. | Choose LM5164QDRCRQ1 only if AEC-Q100 qualification and 65V input are mandatory; MAX17541GATB+T offers higher output current and smaller footprint for industrial use. |
| TPS54240DGQR | 42V input, 2.5A output; external MOSFETs; adjustable frequency (100kHz–2.5MHz); no integrated RESET. | Designed for higher-power industrial motor drives and PLC outputs where 500mA is insufficient. | Choose TPS54240DGQR when >500mA load or programmable frequency is required; MAX17541GATB+T provides simpler BOM and integrated fault signaling for sub-500mA loads. |
Compared with LM5164QDRCRQ1 and TPS54240DGQR, MAX17541GATB+T delivers optimal integration for space-constrained 500mA industrial PoL applications-combining fixed 600kHz operation, built-in RESET, and ultra-small 3mm × 2mm TDFN in a single chip without external FETs or complex compensation.
Availability
MAX17541GATB+T is available at Aetrix Electronics and suitable for industrial process control, HVAC systems, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX17541GATB+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 MAX17541GATB+T belongs to Maxim's high-voltage synchronous buck regulator family, engineered specifically for robust, compact point-of-load conversion in harsh industrial environments with wide input ranges and stringent thermal constraints.
FAQ
What is the maximum output current capability of the MAX17541GATB+T?
The MAX17541GATB+T delivers up to 500mA continuous output current. This rating is validated across the full –40°C to +125°C ambient temperature range and holds under typical PCB thermal conditions with proper layout and thermal vias. Peak current limit is set at 0.76A (typ), ensuring safe operation even during transient overloads without latch-off.
Does the MAX17541GATB+T require external MOSFETs?
No, the MAX17541GATB+T integrates both high-side pMOS and low-side nMOS power switches. Its fully integrated topology eliminates the need for external MOSFETs, gate drivers, or bootstrap components-reducing bill-of-materials count and simplifying layout compared to controller-only solutions.
Can the MAX17541GATB+T operate with a prebiased output?
Yes, the MAX17541GATB+T supports prebiased startup. When enabled into an existing output voltage, both high-side and low-side switches remain off until the first PWM pulse is commanded, preventing reverse current flow and ensuring smooth ramp-up to the target output voltage without output collapse.
What is the purpose of the RESET pin on the MAX17541GATB+T?
The RESET pin on the MAX17541GATB+T is an open-drain output that signals power-good status. It goes low when FB drops below 92.5% of its nominal value and releases 1024 switching cycles after FB rises above 95.5%, providing accurate, delay-compensated sequencing for downstream logic without external supervision circuitry.
Is the MAX17541GATB+T compatible with all-ceramic output capacitors?
Yes, the MAX17541GATB+T is explicitly designed for all-ceramic capacitor operation. Its peak-current-mode control and internal compensation enable stable regulation with X7R/X5R MLCCs-eliminating the need for bulk electrolytic capacitors and reducing solution size by up to 40% versus traditional buck regulators.
MAX17541GATB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-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):
- 42V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 38.64V
- Current - Output:
- 500mA
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (3x2)
MAX17541GATB+T FAQ
1.How can I place an order for MAX17541GATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17541GATB+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 MAX17541GATB+T reliable?
The price and inventory of MAX17541GATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17541GATB+T is usually 5 days.
3.What payment methods are accepted for MAX17541GATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17541GATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17541GATB+T?
MAX17541GATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17541GATB+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 MAX17541GATB+T?
For technical support, including MAX17541GATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17541GATB+T requirements.
6.How does Aetrix verify that MAX17541GATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17541GATB+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 MAX17541GATB+T meets industry standards.
7.What is the process for return or replacement of MAX17541GATB+T?
All MAX17541GATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17541GATB+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 MAX17541GATB+T part is unused and in its original packaging.
Return procedure for MAX17541GATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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