MAX1680

PRODUCTION

MAX1680

125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters

Up to 1MHz Switching Frequency Allows Small Capacitors

PRODUCTION

MAX1680, MAX1681: Typical Operating Circuit slide

MAX1680, MAX1681: Typical Operating Circuit

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Features

Selectable Switching Frequencies:
- 125kHz/250kHz (MAX1680)
- 500kHz/1MHz (MAX1681)
Allow Use of Small Capacitors (1µF for the MAX1681)
125mA Output Current
3.5Ω Output Impedance
1µA Logic-Controlled Shutdown
Configurable as Voltage Inverters or Doublers
+2.0V to +5.5V Input Voltage Range
Available in 8-Pin SO Packages
90% Efficiency

Additional Details

The MAX1680/MAX1681 inductorless switched-capacitor voltage converters either invert an input voltage of +2.0V to +5.5V or double it while supplying up to 125mA output current. They have a selectable-frequency option that allows the use of small capacitors: 4.7µF (MAX1680), 1µF (MAX1681). With their high output current capability, these charge-pump devices are suitable replacements for inductor-based regulators, which require more expensive external components and additional board space.

The devices' equivalent output resistance (typically 3.5Ω) allows them to deliver as much as 125mA with only a 440mV drop. A shutdown feature reduces quiescent current to less than 1µA. The MAX1680/MAX1681 are available in 8-pin SO packages. For devices that deliver up to 50mA in smaller µMAX® packages, refer to the MAX860/MAX861 data sheet.

Applications

Interface Power Supplies
Local Negative Supplies
MOSFET Bias
Op-Amp Power Supplies

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Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

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Part Models 2

1ku List Price Starting From $3.23

Technical Documents 4

MAX1680-MAX1681: 125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters Data Sheet (Rev.0) 07/01/1997

MAX1680 Reliability Data 01/12/2023

Doubler/Inverter Charge Pumps Divide by Two 02/03/2003

Guide to Integrated Charge Pump DC-DC Conversion 11/29/2001

Design Resources 2

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX1680ESA+	Small-Outline IC, Narrow (0.15in)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX1680ESA+T	Small-Outline IC, Narrow (0.15in)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys