The MAX1565 provides a complete power-supply solution for digital still and video cameras through the integration of ultra-high-efficiency step-up/step-down DC-to-DC converters along with three auxiliary step-up controllers. The MAX1565 is targeted for applications that use either 2 or 3 alkaline or NiMH batteries as well as those using a single lithium-ion (Li+) battery. The step-up DC-to-DC converter accepts inputs from 0.7V to 5.5V and regulates a resistor-adjustable output from 2.7V to 5.5V. It uses internal MOSFETs to achieve 95% efficiency. Adjustable operating frequency facilitates design for optimum size, cost, and efficiency. The step-down DC-to-DC converter can produce output voltages as low as 1.25V and also utilizes internal MOSFETs to achieve 95% efficiency. An internal soft-start ramp minimizes surge current from the battery. The converter can operate from the step-up output providing buck-boost capability with up to 90% compound efficiency, or it can run directly from the battery if buck- boost operation is not needed. The MAX1565 features auxiliary step-up controllers that power CCD, LCD, motor actuator, and backlight circuits. The device also features low-cost expandability by supplying power, an oscillator signal, and a reference to the MAX1801 SOT23 slave controller that supports step-up, SEPIC, and flyback configurations. The MAX1565 is available in a space-saving 32-pin thin QFN package. Applications * Digital Still Cameras * Digital Video Cameras * PDAs * Step-Up DC-to-DC Converter * 95% Efficient * 3.3V (Fixed) or 2.7V to 5.5V (Adjustable) Output Voltage * Step-Down DC-to-DC Converter * Operate from Battery for 95% Efficient Buck * Combine with Step-Up for 90% Efficient Buck- Boost * Adjustable Output Down to 1.25V * Three Auxiliary PWM Controllers * Up to 1MHz Operating Frequency * 1µA Shutdown Mode * Internal Soft-Start Control * Overload Protection * Compact 32-Pin, 5mm x 5mm Thin QFN Package https://elecena.pl/product/22316605/small-high-efficiency-five-channel-digital-still-camera-power-supply 2022-12-27 https://elecena.pl/product/22316605/small-high-efficiency-five-channel-digital-still-camera-power-supply 2025-01-18