STM32开发笔记89: SX1268驱动程序设计（电源控制）

单片机型号：STM32L053R8T6

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本系列开发日志，将详述SX1268驱动程序的整个设计过程，本篇介绍电源控制的相关驱动程序。

一、使用DC-DC或者LDO

Two forms of voltage regulation (DC-DC buck converter or linear LDO regulator) are available depending upon the design priorities of the application. The linear LDO regulator is always present in all modes but the transceiver will use DC-DC when selected. Alternatively a high efficiency DC to DC buck converter (DC-DC) can be enabled in FS, Rx and Tx modes.（根据设计需求，有2种电源可供选择：DCDC或LDO，LDO存在于任何模式，但是当DCDC被选择时，收发器将使用DCDC。DCDC可以在FS、Rx和Tx模式使用）

DCDC被2个时钟源驱动：

• in STDBY_XOSC: RC13M is used to supply clock and the frequency is RC13M / 4 so the switching frequency of the DC-DC converter will be 3.25 MHz（在STDBY_XOSC模式，RC13M/4=3.25M用于DCDC）
• in FS, RX, TX: the PLL is used to supply clock