ADP2503是AD公司的一款开关稳压器产品，ADP2503是600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter，本站介绍了ADP2503的封装应用图解、特点和优点、功能等，并给出了与ADP2503相关的AD元器件型号供参考。
ADP2503 - 600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter - 开关稳压器 - 电源管理 - Analog Devices, LLC
The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages greater than, less than, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external part count. At high load currents, the ADP2503/ADP2504 use a current-mode, fixed frequencypulse-width modulation (PWM) control scheme for optimal stability and transient response. To ensure the longest battery life in portable applications, the ADP2503/ADP2504 have an optional power save mode that reduces the switching frequency under light load conditions. For wireless and other low noise applications where variable frequency power save mode may cause interference, the logic control input sync forces fixed frequency PWM operation under all load conditions.
The ADP2503/ADP2504 can run from input voltages between2.3 V and 5.5 V, allowing single lithium or lithium polymer cell,multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. The ADP2503/ADP2504 have fixed output options, or using the adjustable model, the output voltage can be programmed through an external resistor divider. Compensation is internal to minimize the number of external components.
During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 μA from the input source. Operating as boost converters, the ADP2503/ADP2504 feature a true load disconnect function that isolates the load from the power source. Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup.
Applications
Data Sheet, Rev. A, 08/09
该产品包括多种具有不同电压或不同特性的评估板以及RedyKitTM。RedyKit提供两种装配完善且经过测试的评估板，以及用于IC调节器的齐全产品（电压）选项，从而简化产品评估。套件中所有IC选项均分类存放，每个抗静电拉链袋上都清楚地印着ADI产品型号。
只需一个电压源、一个电压表、一个电流表和一些负载电阻，就可以完成简单的器件测量，如线路和负载调整率、压差、地电流等。
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