2.2a在，25V的降压型开关稳压器（直线）
凌特公司（凌特公司）介绍了采用3mm x 3mm DFN封装，2.2a在，25V的降压型开关电源|稳压器LT1938使用。该器件在3.6V的工作至25V的VIN范围是非常适合12V的，并没有传达变压器输入电压调节器。 3.1a开关低至您可以提供高达的持续输出电流2.2a在其内部1.265V时电压。频率范围为300kHz开关至2.8MHz是用户可编程的，使设计师能够优化效率，同时避开关键的噪声敏感频段。其3mm x 3mm DFN - 10封装和高开关频率（允许更小的电容器和电感器）能够LT1938组件板面积非常紧凑和高热效率的解决方案。
LT1938的高效率3.1A，0.18Ω开关，在一个芯片所需的升压二极管，振荡器，控制和逻辑电路集成。方法，可以在特别设计的宽输入电压范围内实现高效率，同时其电流模式拓扑实现了快速瞬态响应和卓越的环路稳定性。其它特点包括电源良好的软启动功能标签。
每对2.75美元LT1938EDD片的价格却现成的货架。
2.2A, 25V Step-Down Switching Regulators (Linear)
Linear Technology Corporation (Linear Technology Corporation) introduced the use of 3mm x 3mm DFN package, 2.2A, 25V step-down switching power supply | voltage regulator LT1938. The device works in 3.6V to 25V range of VIN is very suitable for 12V and did not communicate the transformer input voltage regulator. 3.1a switch its internal 1.265V voltage as low as you can provide up to 2.2A of continuous output current. Switching frequency from 300kHz to 2.8MHz are user programmable, so that designers can optimize efficiency while avoiding critical noise-sensitive frequency bands. Its 3mm x 3mm DFN-10 package and high switching frequency (allowing the use of smaller capacitors and inductors) to be able to LT1938 component footprint is very compact and thermally efficient solution.
LT1938 high efficiency 3.1A, 0.18Ω switch, integrated in a single chip the necessary boost diode, oscillator, control and logic circuits. Ways can be specially designed in a wide input voltage range to achieve high efficiency, while its current mode topology enables fast transient response and excellent loop stability. Other features include power good and soft-start function tag.
price per tablet LT1938EDD for 2.75 U.S. dollars, has off-the-shelf. (07-10-23)
Tags: linear, mm, switching, voltage