Datasheet 搜索 > DC/DC转换器 > TI（德州仪器） > LM25085MY/NOPB 数据手册 > LM25085MY/NOPB 产品手册 1/24 页
器件3D模型￥ 8.306
LM25085MY/NOPB 产品手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
DC/DC转换器
封装:
MSOP-8
描述:
TEXAS INSTRUMENTS LM25085MY/NOPB 控制器, PFET, 恒定通导时间, 4.5V至42V, 1路输出, 降压, 1MHz, MSOP-8
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3Hot
典型应用电路图在P1
原理图在P10P11P14P15
封装尺寸在P2P21
型号编码规则在P2
封装信息在P5
功能描述在P1P11
技术参数、封装参数在P4P5
应用领域在P11P14
电气规格在P4P5P6P13
导航目录
LM25085MY/NOPB数据手册
Page:
of 24 Go
若手册格式错乱，请下载阅览PDF原文件
LM25085
December 17, 2009
42V Constant On-Time PFET Buck Switching Controller
General Description
The LM25085 is a high efficiency PFET switching regulator
controller that can be used to quickly and easily develop a
small, efficient buck regulator for a wide range of applications.
This high voltage controller contains a PFET gate driver and
a high voltage bias regulator which operates over a wide 4.5V
to 42V input range. The constant on-time regulation principle
requires no loop compensation, simplifies circuit implemen-
tation, and results in ultra-fast load transient response. The
operating frequency remains nearly constant with line and
load variations due to the inverse relationship between the
input voltage and the on-time. The PFET architecture allows
100% duty cycle operation for a low dropout voltage. Either
the R
DS(ON)
of the PFET or an external sense resistor can be
used to sense current for over-current detection.
Features
■
LM25085Q is an Automotive Grade product that is AEC-
Q100 grade 1 qualified (-40°C to 125°C operating junction
temperature)
■
Wide 4.5V to 42V input voltage range
■
Adjustable current limit using R
DS(ON)
or a current sense
resistor
■
Programmable switching frequency to 1MHz
■
No loop compensation required
■
Ultra-Fast transient response
■
Nearly constant operating frequency with line and load
variations
■
Adjustable output voltage from 1.25V
■
Precision ±2% feedback reference
■
Capable of 100% duty cycle operation
■
Internal soft-start timer
■
Integrated high voltage bias regulator
■
Thermal shutdown
Package
■
MSOP-8EP
■
MSOP-8
■
LLP-8 (3 mm x 3 mm)
Typical Application, Basic Step Down Controller
30079301
© 2009 National Semiconductor Corporation 300793 www.national.com
LM25085 42V Constant On-Time PFET Buck Switching Controller
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
