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

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.Applications

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

* 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