Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply
Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply Integrates Ultra-High-Efficiency Step-Up/Step-Down DC-DC Converters Along with Three Auxiliary Step-Up Controllers
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.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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MAX1565
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TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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RoHS/Lead-Free? Materials Analysis
MAX1565ETJ
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TQFN;32 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0012 (PDF)
Use pkgcode/variation: T3255-4*
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