L6928中文资料高效单片式同步降压稳压器数据手册ST规格书

描述 Description

The device is a DC-DC monolithic regulator specifically designed to provide high efficiency. The L6928 supply voltage can be as low as 2 V to be used in single Li-Ion cell supplied applications. Output voltage can be selected by an external divider down to 0.6 V. Duty cycle can saturate 100% allowing low-dropout operation. The device is based on a 1.4 MHz fixed frequency, current mode architecture. Low consumption mode operation can be selected at light load conditions, allowing switching losses to be reduced. The L6928 is externally synchronized by a clock, which makes it useful in noise sensitive applications. Other features like Power Good, overvoltage protection, short-circuit protection and thermal shutdown (150 °C) are also present.

特性 Features

• 2 V to 5.5 V battery input range
• High efficiency: up to 95%
• Internal synchronous switch
• No external Schottky diode required
• Extremely low quiescent current
• 1 µA max. shutdown supply current
• 800 mA max. output current
• Adjustable output voltage from 0.6 V
• Low-dropout operation: up to 100% duty cycle
• Selectable low noise/low consumption mode at light load
• Power Good signal
• ± 1% output voltage accuracy
• Current mode control
• 1.4 MHz switching frequency
• Externally synchronized from 1 MHz to 2 MHz
• OVP
• Short-circuit protection

简介

L6928属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的L6928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。