Datasheet > 电源电路 > 开关式稳压器或控制器> LM25117QPSQE

LM25117QPSQE

更新时间： 2024-11-15 12:21:39

品牌	Logo	应用领域
德州仪器 - TI		监控控制器
页数	文件大小	规格书
33页	703K
描述
Wide Input Range Synchronous Buck Controller with Analog Current Monitor

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

LM25117QPSQE 数据手册

April 10, 2012

LM25117/LM25117Q

Wide Input Range Synchronous Buck Controller with

Analog Current Monitor

General Description

Features

The LM25117 is a synchronous buck controller intended for

step-down regulator applications from a high voltage or widely

varying input supply. The control method is based upon cur-

rent mode control utilizing an emulated current ramp. Current

mode control provides inherent line feed-forward, cycle-by-

cycle current limiting and ease of loop compensation. The use

of an emulated control ramp reduces noise sensitivity of the

pulse-width modulation circuit, allowing reliable control of

very small duty cycles necessary in high input voltage appli-

cations.

LM25117Q is an Automotive Grade product that is AEC-

■

Q100 grade 1 qualified (-40°C to +125°C operating

junction temperature)

Emulated peak current mode control

■

Wide operating range from 4.5V to 42V

Robust 3.3A peak gate drives

Adaptive dead-time output driver control

Free-run or synchronizable clock up to 750kHz

Optional diode emulation mode

The operating frequency is programmable from 50 kHz to 750

kHz. The LM25117 drives external high-side and low-side

NMOS power switches with adaptive dead-time control. A us-

er-selectable diode emulation mode enables discontinuous

mode operation for improved efficiency at light load condi-

tions. A high voltage bias regulator that allows external bias

supply further improves efficiency. The LM25117’s unique

analog telemetry feature provides average output current in-

formation. Additional features include thermal shutdown, fre-

quency synchronization, hiccup mode current limit and

adjustable line under-voltage lockout.

Programmable output from 0.8V

Precision 1.5% voltage reference

Analog current monitor

Programmable current limit

Hiccup mode over current protection

Programmable soft-start and tracking

Programmable line under-voltage lockout

Programmable switch-over to external bias supply

Thermal shutdown

Packages

TSSOP-20EP (Thermally enhanced)

■

LLP-24 (4mmx4mm)

Typical Application

30155001

301550 SNVS714D

www.ti.com

12 3 4 5 6 7...33

中文翻译

下载PDF

与LM25117QPSQE相关器件

型号	品牌	获取价格	描述	数据表
LM25117QPSQE/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117QPSQX	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117QPSQX/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25118	TI	获取价格	LM25118/LM25118Q Wide Voltage Range Buck-Boost Controller
LM25118_15	TI	获取价格	LM25118, LM25118-Q1 Wide Voltage Range Buck-Boost Controller
LM25118MH/NOPB	TI	获取价格	3-42V Wide Vin, Current Mode Non-Synchronous Buck-Boost Controller 20-HTSSOP -40 to 125
LM25118MHE/NOPB	TI	获取价格	LM25118, LM25118-Q1 Wide Voltage Range Buck-Boost Controller
LM25118MHX/NOPB	TI	获取价格	LM25118, LM25118-Q1 Wide Voltage Range Buck-Boost Controller
LM25118-Q1	TI	获取价格	LM25118, LM25118-Q1 Wide Voltage Range Buck-Boost Controller
LM25118Q1MH/NOPB	TI	获取价格	LM25118, LM25118-Q1 Wide Voltage Range Buck-Boost Controller

与LM25117QPSQE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

8
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

4
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

30
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

13

产品中心

服务支持

精选活动

关于我们

帮助中心

LM25117QPSQE

LM25117QPSQE 数据手册

与LM25117QPSQE相关器件

与LM25117QPSQE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

LM25117QPSQE

LM25117QPSQE 数据手册

与LM25117QPSQE相关器件

与LM25117QPSQE相关文章

您还可以找

您在本页遇到什么问题？