AN1330设计与L5970D 1A催效率的DC-DC转换器

AN1330设计与L5970D 1A催效率的DC-DC转换器

AN1330
Application note

Designing with the L5970D 1A high efficiency DC-DC converter

Introduction
The L5970D is a step-down monolithic power switching regulator capable of delivering up to
1 A at output voltages from 1.235 V to 35 V. The operating input voltage ranges from 4.4 V to
36 V. It has been designed using BCDV technology and the power switching element is
implemented through a P-channel DMOS transistor. It does not require a bootstrap
capacitor, and the duty cycle can range up to 100%. An internal oscillator fixes the switching
frequency at 25