Datasheet > 电源电路 > 开关式稳压器或控制器> LM2642MTC

LM2642MTC

更新时间： 2024-11-06 12:09:43

品牌	Logo	应用领域
德州仪器 - TI		开关控制器
页数	文件大小	规格书
31页	1126K
描述
LM2642 Two-Phase Synchronous Step-Down Switching Controller

阅读下载

中文翻译

获取价格

数据手册
替代型号

如果您发现信息不准确，欢迎纠错

LM2642MTC 数据手册

LM2642

www.ti.com

SNVS203I –MAY 2002–REVISED APRIL 2013

LM2642 Two-Phase Synchronous Step-Down Switching Controller

Check for Samples: LM2642

FEATURES

DESCRIPTION

The LM2642 consists of two current mode

•

Two Synchronous Buck Regulators

180° Out of Phase Operation

synchronous buck regulator controllers with

switching frequency of 300kHz.

4.5V to 30V Input Range

The two switching regulator controllers operate 180°

out of phase. This feature reduces the input ripple

RMS current, thereby significantly reducing the

required input capacitance. The two switching

regulator outputs can also be paralleled to operate as

a dual-phase single output regulator.

Power Good Function Monitors Ch.1

37µA Shutdown Current

0.04% (typical) Line and Load Regulation Error

Current Mode Control With or Without a Sense

Resistor

The output of each channel can be independently

adjusted from 1.3 to V_IN• maximum duty cycle. An

internal 5V rail is also available externally for driving

bootstrap circuitry.

•

Independent Enable/Soft-start Pins Allow

Simple Sequential Startup Configuration.

Configurable for Single Output Parallel

Operation. (See Figure 3).

Current-mode feedback control assures excellent line

and load regulation and a wide loop bandwidth for

excellent response to fast load transients. Current is

sensed across either the Vds of the top FET or

across an external current-sense resistor connected

in series with the drain of the top FET. Current limit is

independently adjustable for each channel.

•

Adjustable Cycle-by-Cycle Current Limit

Input Under-voltage Lockout

Output Over-voltage Latch Protection

Output Under-voltage Protection with Delay

Thermal Shutdown

Self Discharge of Output Capacitors When the

Regulator is OFF

The LM2642 features analog soft-start circuitry that is

independent of the output load and output

capacitance. This makes the soft-start behavior more

predictable and controllable than traditional soft-start

circuits.

•

TSSOP package

APPLICATIONS

A PGOOD1 pin is provided to monitor the dc output

of channel 1. Over-voltage protection is available for

both outputs. A UV-Delay pin is also available to

allow delayed shut off time for the IC during an output

under-voltage event.

•

Embedded Computer Systems

High End Gaming Systems

Set-top Boxes

WebPAD

BLOCK DIAGRAM

V_IN

4.5V-30V

UV_Delay

V_OUT1

1.3V-27V

LM2642

PGOOD1

SS/ON1

SS/ON2

V_OUT2

1.3V-27V

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...31

中文翻译

下载PDF

LM2642MTC 替代型号

型号	品牌	替代类型	描述	数据表
LM2642MTCX/NOPB	TI	类似代替	4.5-30V, Two-Phase Peak Current Mode Synchronous Buck Controller 28-TSSOP -40 to 125
LM2642MTCX	TI	类似代替	LM2642 Two-Phase Synchronous Step-Down Switching Controller
LM2642MTC/NOPB	TI	功能相似	Two-Phase Synchronous Step-Down Switching Controller

与LM2642MTC相关器件

型号	品牌	获取价格	描述	数据表
LM2642MTC/NOPB	NSC	获取价格	IC SWITCHING CONTROLLER, 340 kHz SWITCHING FREQ-MAX, PDSO28, TSSOP-28, Switching Regulator
LM2642MTC/NOPB	TI	获取价格	Two-Phase Synchronous Step-Down Switching Controller
LM2642MTCX	TI	获取价格	LM2642 Two-Phase Synchronous Step-Down Switching Controller
LM2642MTCX/NOPB	TI	获取价格	4.5-30V, Two-Phase Peak Current Mode Synchronous Buck Controller 28-TSSOP -40 to 125
LM2642MTCX/NOPB	NSC	获取价格	IC SWITCHING CONTROLLER, 340 kHz SWITCHING FREQ-MAX, PDSO28, TSSOP-28, Switching Regulator
LM2645	NSC	获取价格	Advanced Two-Phase Switching Controller With Two Linear Outputs
LM2645MTD	NSC	获取价格	Advanced Two-Phase Switching Controller With Two Linear Outputs
LM2647	NSC	获取价格	Dual Synchronous Buck Regulator Controller
LM2647	TI	获取价格	LM2647 Dual Synchronous Buck Regulator Controller
LM2647_15	TI	获取价格	LM2647 Dual Synchronous Buck Regulator Controller

与LM2642MTC相关文章

英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

14
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
2024-11-05

12
三星深化印度制造布局，供应链本地化进程加速
2024-10-29

36
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

33

产品中心

服务支持

精选活动

关于我们

帮助中心

LM2642MTC

LM2642MTC 数据手册

LM2642MTC 替代型号

与LM2642MTC相关器件

与LM2642MTC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

LM2642MTC

LM2642MTC 数据手册

LM2642MTC 替代型号

与LM2642MTC相关器件

与LM2642MTC相关文章

您还可以找

您在本页遇到什么问题？