LTC3545

Demonstration circuit 1193 is a triple output regulator consisting of three constant-frequency step-down converters integrated into LTC3545/-1. DC1193 has an input voltage range of 2.25V to 5.5V, with regulators capable of delivering 800mA of load current on each output. The three regulators operate independently with individual RUN pins and enter pulse skipping mode at low loads for reducing output ripple. In shutdown, the DC1193 draws less than 1uA total. The DC1193 is a very efficient circuit with efficiency reading above 90%. The LTC3545 comes in a 16-pin QFN package, which has an exposed pad on the bottomside of the IC for better thermal performance. High operating frequency of 2.25MHz allows exclusive use of the small size, low profile surface mount components. These features plus internal compensation circuits, make the DC1193 demo board an ideal circuit for use in battery-powered, hand-held applications. DC1193A-A is a demoboard for LTC3545 and DC1193A-B is a demoboard for LCT3545-1.

演示电路1193是一款三通道输出稳压器，它由三个集成到LTC3545/-1中的恒频降压转换器组成。DC1193的输入电压范围为2.25V至5.5V，其中稳压器在每个输出上能够提供800mA的负载电流。三个稳压器通过单独的RUN引脚独立运行，并在低负载下进入跳脉冲模式以降低输出纹波。关断时，DC1193的总消耗电流小于1uA。DC1193是非常高效的电路，效率读数高于90%。LTC3545采用16引脚QFN封装，该封装在IC底部具有裸露焊盘，可提高散热性能。该器件具有2.25MHz的高工作频率，可以专门使用小尺寸、薄型表贴元件。这些特性以及内部补偿电路使DC1193演示板非常适合电池供电、手持式应用。DC1193A-A为LTC3545的演示板，DC1193A-B为LCT3545-1的演示板。