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MAX1565

Maxim
Part Number MAX1565
Manufacturer Maxim
Description Small / High-Efficiency / Five-Channel Digital Still Camera Power Supply
Published May 6, 2005
Detailed Description 19-2712; Rev 0; 1/03 KIT ATION EVALU E L B A AVAIL Small, High-Efficiency, Five-Channel Digital Still Camera Power Sup...
Datasheet PDF File MAX1565 PDF File

MAX1565
MAX1565

Overview
19-2712; Rev 0; 1/03 KIT ATION EVALU E L B A AVAIL Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply General Description Features o Step-Up DC-to-DC Converter 95% Efficient 3.
3V (Fixed) or 2.
7V to 5.
5V (Adjustable) Output Voltage o Step-Down DC-to-DC Converter Operate from Battery for 95% Efficient Buck Combine with Step-Up for 90% Efficient BuckBoost Adjustable Output Down to 1.
25V o Three Auxiliary PWM Controllers o Up to 1MHz Operating Frequency o 1µA Shutdown Mode o Internal Soft-Start Control o Overload Protection o Compact 32-Pin, 5mm x 5mm Thin QFN Package MAX1565 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 softstart 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 buckboost 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-...


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