ST778ACD集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF中文资料

ST778ACD属于集成电路（IC）的稳压器-DC-DC开关稳压器。由意法半导体集团制造生产的ST778ACD稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。

DESCRIPTION

The ST777/778/779 are dc-dc converters that step-up from low voltage inputs requiring only three external components, an inductor (typically 22µH) and two capacitors. The device include a Sinchronous Rectifier that eliminates the need for an external catch diode, and allows regulation even when the input is greater than the output.

Unlike others step-up DC-DC converters the ST777/778/779’s Sinchronous Rectifier turns off in the shutdown mode, fully disconnecting the output from the source. This eliminates the current drain associated with conventional step-up converters when off or in shutdown. Supply current is 270µA under no load and only 20µA in stand by mode.

■ 1V TO 6V INPUT GUARANTEES START-UP UNDER LOAD

■ MAXIMUM OUTPUT CURRENT OF 300mA

(778 OR 779 ADJUSTED TO 3V)

■ LOAD FULLY DISCONNECTED IN SHUTDOWN

■ TYPICAL EFFICIENCY OF 82

■ INTERNAL 1A POWER SWITCH AND SYNCHRONOUS RECTIFIER

■ ADJUSTABLE CURRENT LIMIT ALLOWS LOW-COST INDUCTORS

■ SUPPLY CURRENT OF 270µA (NO LOAD)

■ SHUTDOWN SUPPLY CURRENT 20µA

■ PACKAGE AVAILABLE: DIP-8 AND SO-8