输出电压可调多功能2A高速LDO电压调整器CXLD64189低导通电阻低压差高精度低噪声高纹波抑制大电流高速内部由基准电压源误差放大器驱动晶体管限定电流防止冲击电流电路
发表时间:2020-06-21
浏览次数:172

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1.产品概述       2.产品特点     bEU嘉泰姆

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7.相关产品bEU嘉泰姆

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   CXLD64189系列是实现了低导通电阻与低压差,高精度,低噪声,高纹波抑制的大电流高速LDO电压调整器。内部由基准电压源,误差放大器,驱动晶体管,限定电流电路,防止冲击电流电路,逆流防止电路,过热保护电路,相位补偿电路等组成。内置了最大输出电流在2.0A时可使用的0.17Ω低导通电阻Pch驱动晶体管,最适于在输入/输出电压差非常小的状态下所使用的应用。输出电容(CL)同样支持陶瓷电容等低ESR的电容。此外,通过外置电阻连接到VOFB 端子上,输出电压可在1.2V~5.0V的范围内任意设定。保护电路内置了过电流保护电路和过热保护电路,输出电流达到限定电流,或结温度达到限定温度,保护电路开始工作,可安全地停止IC工作。电流限制值可将外置电阻连接ILIM端子,在0.3~2.5A的范围内任意设定。搭载了防止冲击电流电路,当IC启动时(通过CE控制IC时),将抑制充电到输出电容(CL)的电流(浪涌电流),发挥抑制VIN端变动的作用。此外,通过输入低电平至CE端子,IC将处于待机状态。待机状态时,可将所充电到输出电容(CL)的电荷高速返回到VSS电平。并且内置了防止逆流电流电路,在输出端(VOUT)超出输入端(VIN)以上的电压状态下,能防止逆流电流。The CXLD64189 series are low on-resistance / low dropout voltage, highly precise, low noise, high PSRR, and large current High Speed LDO regulator IC. Internal circuitry includes a reference voltage supply, error amplifier, driver transistor, over-current protection circuit, in-rush current prevention circuit, reverse current protection circuit, thermal shutdown circuit, and phase compensation circuit. A built-in 0.17Ω low ON-resistance Pch driver transistor which can output up to a maximum output current 2.0A are also enclosed in a small surface-mount PKG, even in applications that input and output voltage difference is you use a very small state, it is possible to use in the space-saving. A low ESR ceramic capacitor can be used for the output capacitor (CL). Then, the output voltage is possible to set the output voltage value to 1.2V ~ 5.0V by connecting the external resistors to VOFB terminal. The over current protection circuit will operate when the output current reaches its current limit. The thermal shutdown circuit will operate when the junction temperature reaches its limit temperature. The current limit is possible to arbitrarily set in a range of external resistor in 0.3 ~ 2.5A to ILIM terminal. The inrush current prevention circuit perform the function of suppressing the variation of the VIN line and It is possible to suppress the current (inrush current), which is charged in the output capacitor (CL) during IC start rising (when the IC control in CE). In addition, the CE function enables the output to be turned off and the IC becomes a stand-by mode resulting in greatly reduced power consumption. When in standby mode, the output capacitor (CL) to be discharged at high speed it can be returned to the VSS level. The IC has further built-in reverse current prevention circuit, to prevent backflow current when the voltage state of more than input terminal (VIN) to the output terminal (VOUT).bEU嘉泰姆

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