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PWM/PFM自动转换控制同步降压型微型DC变换器0.3ms的高速软启动CXDC65116内置UVLO欠压锁定功能内部P通道驱动晶体管被强制关闭 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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目录7.相关产品 产品概述 返回TOP CXDC65116系列产品是把线圈和控制IC组成一体的超小型(2.5mm×3.2mm, h=1.0mm)降压DC/DC转换器。只追加2个陶瓷电容外接零部件即制成了最大1.5A的电源电路。因为内置了线圈，能容易地实现电路板布局，能把由于配置零部件及布线而引起的错误动作及噪声抑制在最小限度。输入电压范围在2.7V～5.5V之间。可以在内部把输出电压范围设定在0.8V～3.6V之间。工作频率为3MHz，采用了同步整流的电路方式。工作模式为具有优越的瞬态响应特性的“HiSAT-COT(*)控制”，对应用途能从“PWM控制”和“PWM/PFM自动转换控制”中任选一种控制。“PWM控制”能把输出纹波电压抑制在最小限度。“PWM/PFM自动转换控制”实现了从轻负载到重负载整个负载区域的高效率.软启动时间设定为0.3ms(TYP.)，可以高速启动输出电压。限定电流功能被设定为4.0A(TYP.)。内置了UVLO(Under VoltageLock Out)功能，输入电压在2.0V(TYP.)以下时，可以强制停止驱动晶体管工作。当CE=Low时，利用CL放电功能使CL(负载电容)中的电荷放电，将消耗电流抑制在1.0μA以下。 The CXDC65115/CXDC65116 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.5mm×3.2mm, h=1.0mm). An internal coil simplifies the circuit and enables minimization of noise and other operational trouble due to the circuit wiring. A wide operating voltage range of 2.7V to 5.5V enables support for applications that require an internally fixed output voltage (0.8V to 3.6V). The CXDC65115/CXDC65116 series uses synchronous rectification at an operating frequency of 3.0MHz. The CXDC65115/CXDC65116 series uses HiSAT-COT (*) synchronous rectification. HiSAT-COT+PWM control (CXDC65115) or HiSAT-COT+automatic PWM/PFM switching control (CXDC65116) can be selected. The series have a high speed soft-start as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower. When CE=Low, the integrated CL discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge switch located between the LX and VSS pins. The power consumption will be less than 1.0μA 产品特点 返回TOP 应用范围 返回TOP ●Note PCs ●Printers ●Tablet PCs ●PND(Portable Navigation Device) 技术规格书（产品PDF) 返回TOP 需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！ 产品封装图 返回TOP
电路原理图 返回TOP
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发表时间：2020-06-29浏览次数：328
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