CS51221集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

CS51221属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由安森美半导体公司制造生产的CS51221DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。

The CS51221 fixed frequency feed forward voltage mode PWM controller contains all of the features necessary for basic voltage mode operation. This PWM controller has been optimized for high frequency primary side control operation. In addition, this device includes such features as: Soft−Start, accurate duty cycle limit control, less than 50A startup current, over and undervoltage protection, and bidirectional synchronization. The CS51221 is available in a 16 lead SOIC narrow surface mount package.

Features

• 1.0 MHz Frequency Capability

• Fixed Frequency Voltage Mode Operation, with Feed Forward

• Thermal Shutdown

• Undervoltage Lock−Out

• Accurate Programmable Max Duty Cycle Limit

• 1.0 A Sink/Source Gate Drive

• Programmable Pulse−By−Pulse Overcurrent Protection

• Leading Edge Current Sense Blanking

• 75 ns Shutdown Propagation Delay

• Programmable Soft−Start

• Undervoltage Protection

• Overvoltage Protection with Programmable Hysteresis

• Bidirectional Synchronization

• 25 ns GATE Rise and Fall Time (1.0 nF Load)

• 3.3 V 3 Reference Voltage Output

• Pb−Free Packages are Available*