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Smallest, All-Internal MOSFET, 7-Channel DSC PMIC in Tiny 5mm x 5mm Thin QFN

Industry's Smallest 7-Channel DSC Power Solution

Product Details

Key Features

Simplified Block Diagram

Technical Docs

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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.

Key Features

  • 95% Efficient Synchronous-Rectified DC-DC Converters
  • 90% Efficient Boost-Buck Operation
  • 85% Efficient DC-DC Converters for CCD, LCD, WLED, and/or OLED
  • Internal Compensation on All Channels
  • True Shutdown on All Step-Up Converters
  • Overload Protection
  • Soft-Start for Controlled Startup Current
  • Dropout Operation (100% Duty Cycle) on Step-Down Converters
  • Regulated Current Output for Up to 6 White LEDs
  • PWM Dimming of WLED Current
  • Adjustable LED Overvoltage Protection Up to 27V
  • Transformerless Inverting Converter for CCD
  • 2MHz Switching Frequency for Low-Voltage Channels
  • ±2.5% Switching Frequency Accuracy
  • 1µA Shutdown Supply Current
  • Power-On Voltage Tracking for Core and Main Outputs
  • All Internal Power MOSFETs
  • Active-Low SDOK Power-OK Indicator

Applications/Uses

  • DSCs and DVCs
  • GPS Navigation Systems
  • PDAs and Portable Media Players

Description

The MAX8680 highly efficient complete power-supply solution is designed for digital still cameras (DSCs) and digital video cameras (DVCs). The device integrates seven on-chip power MOSFET DC-DC converters with up to 95% efficiency to power all critical power supplies in DSC systems. Each converter also features True Shutdown™, as well as internal compensation to minimize external component count. The seven DC-DC converter outputs are:
  • Step-up synchronous-rectified DC-DC converter (SU). The MAX8680 is bootstrapped from VSU.
  • MAIN synchronous-rectified step-down DC-DC converter (M) for DSP I/O supply voltage.
  • DDRZ synchronous-rectified step-down DC-DC converter (Z) for DSP DDR supply voltage.
  • Low-voltage (down to 1V) synchronous-rectified step-down DC-DC converter (SD) for DSP core supply voltage.
  • High-voltage, step-up DC-DC converter with current regulation and PWM dimming control (LEDBST) for white LEDs (WLED).
  • High-voltage step-up DC-DC converter (CCDBST) for CCD imagers or positive LCD bias supplies.
  • Transformerless inverting DC-DC converter (CCDINV) for CCD imagers or negative LCD bias supplies.
The MAX8680 has an independent/simultaneous power-on sequence of the CCDBST and CCDINV converters. For a preset power-on sequence of CCDBST before CCDINV, contact the factory. The MAX8680 operates with 1-cell lithium-ion (Li+) battery, two-AA cell, or dual-battery designs and is available in a 5mm x 5mm, 40-pin thin QFN package. The MAX8680 operates over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX8680: Typical Operating Circuit MAX8680: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

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.