MIC38C45BM 数据手册 - Micrel（迈瑞）

电路数量Number of Regulators| \---|--- 输入电压VINVoltage - Input| 7.6V 输出电压VOUTVoltage - Output| 5V 输出电流IoCurrent - Output| 500mA/0.5A 最大压降VDOVoltage - Dropout| 带使能脚EN/CE(ON/OFF功能)With Enable Pin| 最大耗散功率PdPower dissipation| Description & Applications| BiCMOS Current-Mode PWM Controllers ;FEATURES •BiCMOS Current-Mode PWM Controllers • Fast 40ns output rise and 30ns output fall times • –40°C to +85°C temperature range meets UC284x specifications • High-performance, low-power BiCMOS Process • Ultralow start-up current (50µA typical) • Low operating current (4mA typical) • CMOS outputs with rail-to-rail swing • ≥ 500kHz current-mode operation • Trimmed 5V bandgap reference • Pin-for-pin compatible with UC3842/3843/3844/3845(A) • Trimmed oscillator discharge current • UVLO with hysteresis • Low cross-conduction currents Applications • Current-mode, off-line, switched-mode power supplies • Current-mode, dc-to-dc converters. • Step-down “buck” regulators • Step-up “boost” regulators • Flyback, isolated regulators • Forward converters • Synchronous FET converters 描述与应用| BiCMOS电流模式PWM控制器;特点 •BiCMOS电流模式PWM控制器 •快速40ns的输出上升和30ns的输出下降时间 •-40°C至+85°C温度范围内符合规格UC284x •高性能，低功耗的BiCMOS工艺 •超低启动电流（50μA典型） •低工作电流（典型值4毫安） •CMOS输出轨至轨摆动 •≥500kHz电流模式操作 •修剪5V带隙基准 •引脚对引脚兼容UC3842/3843/3844/3845（A） •修剪振荡器放电电流 •UVLO迟滞 •低交叉传导电流 应用 •电流模式，离线开关模式电源 •电流模式的DC-DC转换器。 •降压降压稳压器 •步骤“助推”监管机构 •反激，隔离器 •正向转换器 •同步FET转换器