1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. MAX763A


Features and Benefits

  • Up to 500mA Load Currents
  • Guaranteed 159kHz to 219.5kHz Current-Mode PWM
  • 85% to 90% Efficiencies
  • 1.7mA Quiescent Current (MAX748A)
  • 1.4mA Quiescent Current (MAX763A)
  • 0.2µA Shutdown Supply Current
  • 22µH Preselected Inductor Value; No Component Design Required
  • Overcurrent, Soft-Start, and Undervoltage Lockout Protection
  • Cycle-by-Cycle Current Limiting
  • 8-Pin DIP/SO Packages (MAX763A)

Product Details

The MAX748A/MAX763A are 3.3V-output CMOS, step-down switching regulators. The MAX748A accepts inputs from 3.3V to 16V and delivers up to 500mA. The MAX763A accepts inputs between 3.3V and 11V and delivers up to 500mA. Typical efficiencies are 85% to 90%. Quiescent supply current is 1.4mA (MAX763A), and only 0.2µA in shutdown.

Pulse-width-modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±5% over line, load, and temperature variations. Fixed-frequency switching allows easy filtering of output ripple and noise, as well as the use of small external components. A 22µH inductor works in most applications, so no magnetics design is necessary.

The MAX748A/MAX763A also feature cycle-by-cycle current limiting, overcurrent limiting, undervoltage lockout, and programmable soft-start protection. The MAX748A is available in 8-pin DIP and 16-pin wide SO packages; the MAX763A comes in 8-pin DIP and SO packages.


  • 5V to 3.3V Conversion
  • Cell Phones
  • Computer Peripherals
  • Handheld Computers
  • Portable Instrumentation

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.

Product Recommendations

MAX763A 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
MAX763ACSA+ Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX763ACSA+T Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX763AESA+ Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX763AESA+T Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
Wafer Fabrication Data

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Buy Now Pricing

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