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PAM2308FB1YMEB Datasheet(PDF) 1 Page - Power Analog Micoelectronics |
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PAM2308FB1YMEB Datasheet(HTML) 1 Page - Power Analog Micoelectronics |
1 / 15 page PAM2308 Dual High-Efficiency PWM Step-Down DC-DC Coverter 1 , Power Analog Microelectronics Inc www.poweranalog.com 07/2008 Rev 1.0 Features Applications General Description n Efficiency up to 96% Only 40μA(Typ. per Channel) Quiescent Current Output Current: Up to 1A per Channel Internal Synchronous Rectifier 1.5MHz Switching Frequency Soft Start Under-Voltage Lockout Short Circuit Protection Thermal Shutdown Small 10L WDFN 3x3 Packages RoHS Compliant Cellular Phone Portable Electronics Personal Information Appliances Wireless and DSL Modems MP3 Players The PAM2308 is a dual 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 PAM2308 provides a power-saving Pulse- Skipping Modulation (PSM) mode to reduce quiescent current under light load operation. The PAM2308 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. All versions employ internal power switch and synchronous rectifier for 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. n n n n n n n n n n n n n n n Pb-Free Package and μ The dual output voltages are available for 3.3V, 2.8V, 2.5V, 1.8V, 1.5V, 1.2V or adjustable. Typical Application ( ) Rx2 Rx1 1 V V REF OUTx + = Figure 1. Adjustable Voltage Regulator EN2 FB2 VIN2 LX2 FB1 PAM2308 1 2 9 10 GND LX1 GND 8 5 VOUT2 L2 10 F μ CIN2 100pF VIN1 7 6 EN1 VIN1 4 .7μF L1 R22 4 .7μF VOUT1 100nF 10 F μ R12 VIN2 C Fw1 COUT1 CIN1 COUT2 C FW2 R11 R21 3 4 |
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