LM25085A

更新时间： 2024-11-15 05:42:07

品牌	Logo	应用领域
美国国家半导体 - NSC		开关控制器
页数	文件大小	规格书
24页	500K
描述
42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM25085A 数据手册

March 16, 2009

LM25085A

42V Constant On-Time PFET Buck Switching Controller

with 0.9V Reference

General Description

Features

The LM25085A is a functional variant of the LM25085 COT

PFET Buck Switching Controller. The functional differences

of the LM25085A are: The feedback reference voltage is

0.9V, the forced off-time after current limit detection is longer,

and the soft-start time is shorter (1.8 ms).

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

The LM25085A 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.

Ultra-Fast transient response

Nearly constant operating frequency with line and load

variations

Adjustable output voltage from 0.9V

■

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

30085201

300852

www.national.com

12 3 4 5 6 7...24

中文翻译

下载PDF

与LM25085A相关器件

型号	品牌	获取价格	描述	数据表
LM25085AMM	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085AMM/NOPB	TI	获取价格	4.5-42V Wide Vin, Constant On-Time Non-Synchronous PFET Buck Controller with 0.9V Referenc
LM25085AMME	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085AMME/NOPB	TI	获取价格	4.5V 至 42V 宽输入电压、恒定导通时间非同步、0.9V 基准电压 PFET 降压控
LM25085AMMX	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085AMMX/NOPB	TI	获取价格	4.5V 至 42V 宽输入电压、恒定导通时间非同步、0.9V 基准电压 PFET 降压控
LM25085AMY	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085AMY/NOPB	TI	获取价格	4.5V 至 42V 宽输入电压、恒定导通时间非同步、0.9V 基准电压 PFET 降压控
LM25085AMYE	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085AMYE/NOPB	TI	获取价格	4.5V 至 42V 宽输入电压、恒定导通时间非同步、0.9V 基准电压 PFET 降压控

与LM25085A相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

6
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

3
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

29
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

12

产品中心

服务支持

精选活动

关于我们

帮助中心

LM25085A

LM25085A 数据手册

与LM25085A相关器件

与LM25085A相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM25085A

LM25085A 数据手册

与LM25085A相关器件

与LM25085A相关文章

您还可以找

您在本页遇到什么问题？