1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. MAX17245


Features and Benefits

  • Eliminates External Components and Reduces Total Cost
    • Integrated High-Side and Low-Side Switch Enables Synchronous Operation for High Efficiency and Reduced Cost
    • All-Ceramic Capacitor Solution Allows Ultra-Compact Solution Size
    • 220kHz to 2.2MHz Adjustable Frequency with External Synchronization
    • Power Good Output and High-Voltage EN Input Simplify Power Sequencing
  • Increases Design Flexibility
    • 180° Out-of-Phase Clock Output at SYNCOUT Enables Cascaded Power Supplies for Increased Power Output
    • Fixed Output Voltage with ±2% Accuracy (5V/3.3V) or Externally Resistor Adjustable (1V to 10V)
  • Reduces Power Dissipation
    • >90% Peak Efficiency
    • PWM and PFM Operation Optimizes Conversion Efficiency From Heavy to Light Loads
    • Automatic LX Slew-Rate Adjustment for Optimum Efficiency Across Operating Frequency Range
    • Low 5µA (typ.) Shutdown Current
    • Low 28µA (typ.) Quiescent Current
  • Operates Reliably
    • 42V Input Voltage Transient Protection
    • Fixed 8ms Internal Software Start Reduces Input Inrush Current
    • Cycle-by-Cycle Current limit, Thermal Shutdown with Automatic Recovery
    • Reduced EMI Emission with Spread-Spectrum Control

Product Details

The MAX17245 high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 3.5V to 36V input voltage range with 42V input transient protection. The MAX17245 can operate in dropout condition by running at 98% duty cycle. This converter delivers up to 3.5A and generates fixed output voltages of 3.3V/5V, along with the ability to program the output voltage between 1V to 10V.

The MAX17245 uses a current-mode control architecture and can operate in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads and is useful in applications sensitive to switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. Under light-load applications, the external sync pin FSYNC logic input allows the device to operate in either PFM mode for reduced current consumption or fixed-frequency PWM (forced-PWM) mode to eliminate frequency variation to minimize EMI. Fixed-frequency PWM mode is extremely useful for power supplies designed for RF transceivers where tight emission control is necessary.

This device is available in a compact 16-pin (5mm × 5mm) TQFN package with exposed pad and 16-pin TSSOP. -40°C to +85°C operation.


  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • Wall Transformer Regulation

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations

EE-Sim® Power Tools

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.



MAX17245 SIMPLIS Schematic

MAX17245 SIMPLIS Schematic

Product Recommendations

MAX17245 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX17245ETERA+ Material Declaration Reliability Data 16-LFCSP-5X5X0.75
MAX17245ETERB+ Material Declaration Reliability Data 16-LFCSP-5X5X0.75
MAX17245ETESA+ Material Declaration Reliability Data 16-LFCSP-5X5X0.75
MAX17245ETESA+T Material Declaration Reliability Data 16-LFCSP-5X5X0.75
MAX17245ETESB+ Material Declaration Reliability Data 16-LFCSP-5X5X0.75
Wafer Fabrication Data

PCN-PDN Information

Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

Sample & Buy

Ordering FAQs

See our Ordering FAQs for answers to questions about online orders, payment options and more.


Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Price Table Help