1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. MAX17552B


Features and Benefits

  • Eliminates External Components and Reduces Total Cost
    • No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation
    • Fixed Internal 5.1ms or Programmable Soft-Start
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4V to 60V Input Voltage Range
    • Adjustable 0.8V to 0.9 x VIN Output Voltages
    • Delivers Up to 100mA Load Current
    • 100kHz to 2.2MHz Adjustable Switching Frequency Range with External Clock Synchronization
    • Configurable Between PFM and Forced-PWM Modes
  • Reduces Power Dissipation
    • 22µA No Load Supply Current
    • Peak Efficiency > 90%
    • PFM Feature for High Light-Load Efficiency
    • 1.2µA (typ) Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Peak Current-Limit Protection
    • Built-In Output-Voltage Monitoring with Open-Drain Active-Low RESET Pin
    • Programmable EN/UVLO Threshold
    • Complies with CISPR32 (EN55032) Class B Conducted and Radiated Emissions
    • Monotonic Startup into Prebiased Output
    • Overtemperature Protection
    • Wide -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range

Product Details

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power-supply solutions. The MAX17552/ MAX17552A/MAX17552B high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converters with integrated MOSFETs operate over a 4V to 60V input voltage range.. The converters can deliver output current up to 100mA at output voltages of 0.8V to 0.9 x VIN. The output voltage is accurate to within ±1.75% over the -40°C to +125°C temperature range.

The devices employ a peak-current-mode control architecture with a MODE pin that can be used to operate the device in 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 variable switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. The converters consume only 22µA of no-load supply current in PFM mode. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify PCB layout.

The devices offer programmable switching frequency to optimize solution size and efficiency. Programmable softstart allows the user to reduce the inrush currents. During overload, the MAX17552 implements a hysteretic cycle-by-cycle peak-current-limit protection scheme, while the MAX17552A/MAX17552B implements a HICCUP-type overload protection scheme to protect the inductor and the internal FETs. An EN/UVLO pin allows the user to turn on/off the device at the desired input-voltage level. An open-drain active-low RESET pin allows output-voltage monitoring. The devices operate over the -40°C to +125°C industrial temperature range and is available in a compact 10-pin (3mm x 2mm) TTDFN/TDFN-CU and 10-pin (3mm x 3mm) µMAX® packages. Simulation models are available.


  • 4–20mA Current-Loop Powered Sensors
  • Battery-Powered Equipment
  • General-Purpose Point-of-Load
  • High-Voltage LDO Replacement
  • HVAC and Building Control
  • Industrial Sensors and Process Control

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 (3)

Product Recommendations

MAX17552B 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
MAX17552BATB+ Material Declaration Reliability Data 10-LFCSP-3X2X0.75
MAX17552BATB+T Material Declaration Reliability Data 10-LFCSP-3X2X0.75
Wafer Fabrication Data MAX17552B Reliability Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.