ADP2108 is a high-efficiency, low-quiescent current step-down DC-DC converter in an ultra-small 5-bump WLCSP package. The overall solution requires only three extremely small external components. It uses a patented high-speed current mode, frequency-stabilized pulse-width modulation (PWM) control mechanism to provide excellent stability and instantaneous response. To guarantee the highest battery life in portable applications, an energy-saving mode is ADP2108 provided to reduce the switching frequency under light load conditions.
ADP2108 can operate at an input voltage of 2.3V to 5.5V, and can use single lithium or lithium polymer batteries, composite alkaline or nickel-metal hydride batteries, PCMCIA, USB and other standard power supplies. The maximum load current within the above input voltage range is 600mA.
ADP2108 are available in fixed output voltages of 3.3V, 3.0V, 2.5, 2.3V, 1.8V, 1.5, 1.3V, 1.2V, 1.1V, and 1.0V. For the minimum number of external components and high efficiency, all versions have built-in power switches and synchronous rectifiers. ADP2108 has a built-in soft-start function and has an internal compensation mechanism. During logic control shutdown, the input is disconnected from the output and the input source leakage current is less than 0.1A. Other key features include undervoltage latching to prevent deep battery discharge and soft start to prevent overshoot of input current during start-up. ADP2108 is available in a 5-bump WLCSP package.
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Advantages and features:
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峰值效率：95%
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3 MHz固定工作频率
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典型静态电流：18µA
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最大负载电流：600mA
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输入电压：2.3V到5.5V
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使用极小的多层电感和电容
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供快速载入和线路瞬态响应的电流方式结构
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100%工作周期低压差模式
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内置同步整流器
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内置补偿电路
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内置软启动
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欲了解更多特性，请参考数据手册