AN937设计与L4971，1.5一个催效率的DC-DC转换器

AN937设计与L4971，1.5一个催效率的DC-DC转换器

AN937
Application Note

Designing with L4971, 1.5 A high efficiency DC-DC converter

Introduction
The L4971 is a 1.5 A monolithic dc-dc converter, step- down, operating at fix frequency
continuous mode. It is designed in BCD60 II technology, and it is available in two plastic
packages, DIP8 and SO16L.
One direct fixed output voltage at 3.3 V ±1% is available, adjustable for higher output voltage
values, till 40 V, by an external voltage divider.
The operating input supply voltage ranges from 8 V to 55 V, while the absolute value, with no