Datasheet > LM2747MTCX

LM2747MTCX

更新时间： 2024-11-25 11:34:19

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器时钟
页数	文件大小	规格书
23页	1006K
描述
Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization

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LM2747MTCX 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
包装说明：	PLASTIC, TSSOP-14	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.22	模拟集成电路 - 其他类型：	SWITCHING CONTROLLER
控制模式：	VOLTAGE-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	6 V	最小输入电压：	3 V
标称输入电压：	3.3 V	JESD-30 代码：	R-PDSO-G14
JESD-609代码：	e0	长度：	5 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	14	最高工作温度：	125 °C
最低工作温度：	-40 °C	最大输出电流：	0.35 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP14,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.1 mm
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	PUSH-PULL	最大切换频率：	1000 kHz
温度等级：	AUTOMOTIVE	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	4.4 mm	Base Number Matches：	1

LM2747MTCX 数据手册

March 2006

LM2747

Synchronous Buck Controller with Pre-bias Startup, and

Optional Clock Synchronization

General Description

Features

1% feedback voltage accuracy over temperature

The LM2747 is a high-speed synchronous buck regulator

controller with a feedback voltage accuracy of 1%. It can

provide simple down conversion to output voltages as low as

0.6V. Though the control section of the IC is rated for 3 to 6V,

the driver section is designed to accept input supply rails as

high as 14V. The use of adaptive non-overlapping MOSFET

gate drivers helps avoid potential shoot-through problems

while maintaining high efficiency. The IC is designed for the

more cost-effective option of driving only N-channel MOS-

FETs in both the high-side and low-side positions. It senses

the low-side switch voltage drop for providing a simple,

adjustable current limit.

n Switching frequency from 50 kHz to 1 MHz

n Switching frequency synchronize range 250 kHz to 1

MHz

n Startup with a pre-biased output load

n Power stage input voltage from 1V to 14V

n Control stage input voltage from 3V to 6V

n Output voltage adjustable down to 0.6V

n Power Good flag and shutdown

n Output overvoltage and undervoltage detection

n Low-side adjustable current sensing

n Adjustable soft-start

The LM2747 features a fixed-frequency voltage-mode PWM

control architecture which is adjustable from 50 kHz to 1

MHz with one external resistor. In addition, the LM2747 also

allows the switching frequency to be synchronized to an

external clock signal over the range of 250 kHz to 1 MHz.

This wide range of switching frequency gives the power

supply designer the flexibility to make better tradeoffs be-

tween component size, cost and efficiency.

n Tracking and sequencing with shutdown and soft start

pins

n TSSOP-14 package

Applications

n Down Conversion from 3.3V

n Cable Modem, DSL and ADSL

n Laser Jet and Ink Jet Printers

n Low Voltage Power Modules

n DSP, ASIC, Core and I/O

Features include the ability to startup with a pre-biased load

on the output, soft-start, input undervoltage lockout (UVLO)

and Power Good (based on both undervoltage and overvolt-

age detection). In addition, the shutdown pin of the IC can be

used for providing startup delay, and the soft-start pin can be

used for implementing precise tracking, for the purpose of

sequencing with respect to an external rail.

Typical Application

20150901

DS201509

www.national.com

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与LM2747MTCX相关器件

型号	品牌	获取价格	描述	数据表
LM2747MTCX/NOPB	TI	获取价格	Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock Synchronization
LM2748	TI	获取价格	LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock
LM2748	NSC	获取价格	Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
LM2748MTC	NSC	获取价格	Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
LM2748MTC	TI	获取价格	LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup
LM2748MTC/NOPB	TI	获取价格	LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup
LM2748MTCX	TI	获取价格	LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock
LM2748MTCX	NSC	获取价格	Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
LM2748MTCX/NOPB	TI	获取价格	LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup
LM2750	NSC	获取价格	Low Noise, 5.0V Regulated Switched Capacitor Voltage Converter

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