MAX8680 Datasheet | Maxim Integrated

Description The MAX8680 highly efficient plete 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 pensation to minimize external ponent 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. 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 pensation 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 - SDOK Power-OK Indicator - - - The MAX8680 has an independent/simultaneous power-on sequence of the CCDBST...