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ML1565QFNG Arkusz danych(PDF) 1 Page - Minilogic Device Corporation Limited |
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ML1565QFNG Arkusz danych(HTML) 1 Page - Minilogic Device Corporation Limited |
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1 / 21 page  P1/21 Rev. C, Sep 2005 ML1565 ML1565 Step-Up-Down DC-DC Converts Digital Still camera Power Supply High-Efficiency, 5-channel General Description The ML1565 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 con- verters along with three auxiliary step-up controllers. The ML1565 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 softstart ramp minimizes surge current form 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 ML1565 features auxiliary step-up controllers that power CCD, LCD, motor actuator, and backlight circuits. The ML1565 is available in a space-saving QFN-32 thin package. ■ Pin Configuration Features 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 form 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, 5mmx5mm Thin QFN Package Ordering Information Item Package Mark Shipping ML1565QFNG QFN-32 ML1565 160pcs/ Tray Applications Digital Still Cameras Digital video Cameras PDAs ■ Typical operating Circuit ML1565 -- ML1565 |
Podobny numer części - ML1565QFNG |
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Podobny opis - ML1565QFNG |
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