Datasheet > 电源电路 > 开关式稳压器或控制器> LM25117PSQE

LM25117PSQE

更新时间： 2024-11-15 12:21:39

品牌	Logo	应用领域
德州仪器 - TI		稳压器开关式稳压器或控制器电源电路开关式控制器输出元件监控
页数	文件大小	规格书
33页	703K
描述
Wide Input Range Synchronous Buck Controller with Analog Current Monitor

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技术参数
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LM25117PSQE 技术参数

生命周期：	Obsolete	零件包装代码：	QFN
包装说明：	4 X 4 MM, LLP-24	针数：	24
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.59
Is Samacsys：	N	其他特性：	ALSO HAS OUTPUT VOLTAGE UP TO 0.8V, HGT NOM
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	42 V
最小输入电压：	4.5 V	标称输入电压：	24 V
JESD-30 代码：	S-XQCC-N24	长度：	4 mm
功能数量：	1	端子数量：	24
最高工作温度：	125 °C	最低工作温度：	-40 °C
标称输出电压：	7.6 V	封装主体材料：	UNSPECIFIED
封装代码：	HVQCCN	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	认证状态：	Not Qualified
座面最大高度：	0.8 mm	表面贴装：	YES
切换器配置：	PUSH-PULL	最大切换频率：	530 kHz
温度等级：	AUTOMOTIVE	端子形式：	NO LEAD
端子节距：	0.5 mm	端子位置：	QUAD
宽度：	4 mm	Base Number Matches：	1

LM25117PSQE 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

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与LM25117PSQE相关器件

型号	品牌	获取价格	描述	数据表
LM25117PSQE/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117PSQX	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117PSQX/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117-Q1	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117QPMH	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117QPMH/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117QPMHE	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117QPMHE/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117QPMHX	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117QPMHX/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor

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