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PAM2309 Datasheet(PDF) 1 Page - Power Analog Micoelectronics |
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PAM2309 Datasheet(HTML) 1 Page - Power Analog Micoelectronics |
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1 / 16 page  Features Applications General Description n n n n n n n n n n n Efficiency up to 96% Only 40 A(TYP.) Quiescent Current Output Current: Up to 1A Internal Synchronous Rectifier 1.5MHz Switching Frequency Soft Start Under-Voltage Lockout Short Circuit Protection Thermal Shutdown 5-pin Small SOT23-5, DFN2x2 6-Pin and QFN3x3 16-Pin Packages Cellular Phone Portable Electronics Wireless Devices Cordless Phone Computer Peripherals Battery Powered Widgets Electronic Scales Digital Frame The PAM2309 is a step-down current-mode, DC- DC converter. At heavy load, the constant- frequency PWM control performs excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2309 provides a power-saving Pulse- Skipping Modulation (PSM) mode to reduce quiescent current under light load operation to save power. The PAM2309 supports a range of input voltages from 2.5V to 5.5V, allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, USB, and other standard power sources. The output voltage is adjustable from 0.6V to the input voltage. All versions employ internal power switch and synchronous rectifierfor to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 0.1 A. Other key features include under-voltage lockout to prevent deep battery discharge. The PAM2309 is available in SOT23-5, DFN2x2 6- Pin and QFN3x3 16-Pin packages. μ μ Pb-Free Package n n n n n n n n Typical Application 1 www.poweranalog.com PAM2309 1A Step-Down DC-DC Converter , Power Analog Microelectronics Inc 1 0.5 1 2 æö =´ + ç÷ èø O R V R VIN SW GND EN VOUT/FB L Vo Co 10μF V C IN IN 10μF C FW R1 R2 08/2009 Rev 1.1 |
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