您现在的位置是:首页 > 技术资料 > 同步降压芯片-ZCC3430
推荐星级:
  • 1
  • 2
  • 3
  • 4
  • 5

同步降压芯片-ZCC3430

更新时间:2019-11-21 10:34:16 大小:389K 上传用户:wxsw查看TA发布的资源 标签:降压芯片 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

资料介绍

同步降压芯片ZCC3430

ZCC3430是一种高效单片同步稳压器采用恒定频率,电流模式架构。该设备有可调版本。空载供电电流为40uA,停机时降至<1uA2.5V5.5V的输入电压范围使ZCC3430非常适合用于单锂离子电池供电的应用。100%占空比提供低漏失操作,延长便携式系统的电池寿命。PWM/PFM模式操作为噪声敏感应用提供非常低的输出纹波电压。开关频率内部设置为1.2兆赫,允许使用小型表面贴装电感和电容器。低输出电压很容易支持0.6V反馈参考电压。

特征:

•高效:高达96%

2.5V5.5V输入电压范围

1MHz恒频运行

•不需要肖特基二极管

•低压差操作:100%占空比

•轻载高效PFM模式

•过热保护

•低静态电流:40μA

•短路保护

•过电压保护

应用:

•手机和智能手机

•无线和DSL调制解调器

PDA系统

•便携式仪器

•数码相机和摄像机

PC

 

3430.PNG

部分文件列表

文件名 大小
ZCC3430_V1[1].0.pdf 389K

部分页面预览

(完整内容请下载后查看)
无锡市至诚微电子有限公司  
ZCC3430  
3A Synchronous Step-Down Converter  
GENERAL DESCRIPTION  
FEATURES  
High Efficiency: Up to 96%  
2.5V to 5.5V Input Voltage Range  
1.2MHz Constant Frequency Operation  
No Schottky Diode Required  
Low Dropout Operation:100% Duty  
Cycle  
The ZCC3430 is  
a
high-efficiency  
monolithic synchronous buck regulator  
using a constant frequency, current mode  
architecture. The device is available in an  
adjustable version. Supply current with no  
load is 40uA and drops to <1uA in  
shutdown. The 2.5V to 5.5V input voltage  
range makes the ZCC3430 ideally suited  
PFM Mode for High Efficiency in Light  
Load  
Over temperature Protected  
Low Quiescent Current: 40μA  
Short Circuit Protection  
Over Voltage Protection  
Inrush Current Limit and Soft Start  
SOT23-5 and DFN22-6 package  
for single  
Li-Ion battery powered  
applications. 100% duty cycle provides low  
dropout operation, extending battery life in  
portable systems. PWM/PFM mode  
operation provides very low output ripple  
voltage for noise sensitive applications.  
Switching frequency is internally set at  
1.2MHz, allowing the use of small surface  
mount inductors and capacitors. Low  
output voltages are easily supported with  
the 0.6V feedback reference voltage.  
APPLICATIONS  
Cellular and Smart Phones  
Wireless and DSL Modems  
PDAs  
Portable Instruments  
Digital Still and Video Cameras  
PC Cards  
The ZCC3430 is offered in a low profile  
(1mm) 5-pin, thin SOT package, and is  
available in an adjustable version.  
TYPICAL APPLICATION  
Page 1  

全部评论(0)

暂无评论

上传资源 上传优质资源有赏金

  • 打赏
  • 30日榜单

推荐下载