Overview

Features and Benefits

  • 90% Efficiency for 10mA to 1A Load Currents
  • Up to 15W Output Power
  • 110µA Max Supply Current
  • 5µA Max Shutdown Current
  • 2V to 16.5V Input Range (MAX770/MAX771/MAX772)
  • Internal Shunt Regulator for High Input Voltages (MAX773)
  • Preset or Adjustable Output Voltages
    • MAX770: 5V or Adjustable
    • MAX771: 12V or Adjustable
    • MAX772: 15V or Adjustable
    • MAX773: 5V, 12V, 15V, or Adjustable
  • Current-Limited PFM Control Scheme
  • 300kHz Switching Frequency

Product Details

The MAX770-MAX773 step-up switching controllers provide 90% efficiency over a 10mA to 1A load. A unique current-limited pulse-frequency-modulation (PFM) control scheme gives these devices the benefits of pulse-width-modulation (PWM) converters (high efficiency at heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters).

These ICs use tiny external components. Their high switching frequencies (up to 300kHz) allow surface-mount magnetics of 5mm height and 9mm diameter.

The MAX770/MAX771/MAX772 accept input voltages from 2V to 16.5V. Output voltages are preset at 5V, (MAX770), 12V (MAX771), and 15V (MAX772); they can also be adjusted using two resistors.

The MAX773 accepts inputs from 3V to 16.5V. For a wider input range, it features an internal shunt regulator that allows unlimited higher input voltages. The MAX773's output can be set to 5V, 12V, or 15V, or it can be adjusted with two resistors.

The MAX770-MAX773 drive external N-channel MOSFET switches, allowing them to power loads up to 15W. If less power is required, use the MAX756/MAX757 or MAX761/MAX762 step-up switching regulators with on-board MOSFETs.

Applications

  • Battery-Powered Applications
  • Flash Memory Programming
  • High-Efficiency DC-DC Converters
  • Palmtops, Handy Terminals
  • Portable Communicators
  • Positive LCD-Bias Generators

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)

Product Recommendations

MAX773 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.

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.

 

Sampling


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