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PAM2301 Datasheet(PDF) 1 Page - Power Analog Micoelectronics |
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PAM2301 Datasheet(HTML) 1 Page - Power Analog Micoelectronics |
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1 / 13 page  Features Applications General Description n n n n n n n n n n n Efficiency up to 96% Only 40μA(TYP.) Quiescent Current Output Current: Up to 800mA Internal Synchronous Rectifier 1.5MHz Switching Frequency Soft Start Under-Voltage Lockout Short Circuit Protection Thermal Shutdown 5-pin Small SOT23-5 Package Cellular Phone Portable Electronics Wireless Devices Cordless Phone Computer Peripherals Battery Powered Widgets Electronic Scales Digital Frame The PAM2301 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 PAM2301 provides a power-saving Pulse- Skipping Modulation (PSM) mode to reduce quiescent current under light load operation to save power. The PAM2301 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, while the part number suffix PAM2301- XX indicates pre-set output voltage of 3.3V, 2.8V, 2.5V, 1.8V, 1.5V, 1.2V or adjustable. 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 PAM2301 is available in SOT23-5 package. Pb-Free Package n n n n n n n n μ Typical Application VIN SW EN VOUT GND 4 7μH . Vo Co 10μF 3 5 V C 10μF IN IN 4 1 2 1 www.poweranalog.com VIN SW EN FB GND 4 7μH . Vo Co 10μF 3 5 V C IN IN 10μF 4 1 2 20pF R1 R2 PAM2301 800mA Step-Down DC-DC Converters Fixed Output Voltage Adjustable Output Voltage 09/2008 Rev 1.3 , Power Analog Microelectronics Inc 1 0.6 1 2 O R V R æö =´ + ç÷ èø |
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