MAX8680
ObsoleteSmallest, All-Internal MOSFET, 7-Channel DSC PMIC in Tiny 5mm x 5mm Thin QFN
Industry's Smallest 7-Channel DSC Power Solution
Part Details
- 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
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.
Applications
- DSCs and DVCs
- GPS Navigation Systems
- PDAs and Portable Media Players
Documentation
Data Sheet 1
Reliability Data 1
Request an NDA
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA).
Request an NDAThis is the most up-to-date revision of the Data Sheet.
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