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LM5642MTCXSLASHNOPB中文资料德州仪器数据手册PDF规格书

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厂商型号

LM5642MTCXSLASHNOPB

功能描述

LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization

文件大小

1.18751 Mbytes

页面数量

44

生产厂商

TI

中文名称

德州仪器

网址

网址

数据手册

下载地址一下载地址二到原厂下载

更新时间

2025-10-4 15:18:00

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LM5642MTCXSLASHNOPB价格和库存,欢迎联系客服免费人工找货

LM5642MTCXSLASHNOPB规格书详情

1FEATURES

2• Two Synchronous Buck Regulators

• 180° Out of Phase Operation

• 200 kHz Fixed Nominal Frequency: LM5642

• 375 kHz Fixed Nominal Frequency: LM5642X

• Synchronizable Switching Frequency from 150

kHz to 250 kHz for the LM5642 and 200 kHz to

500 kHz for the LM5642X

• 4.5V to 36V Input Range

• 50 μA Shutdown Current

• Adjustable Output from 1.3V to 90% of Vin

• 0.04% (Typical) Line and Load Regulation

Accuracy

• Current Mode Control with or without a Sense

Resistor

• Independent Enable/Soft-start Pins Allow

Simple Sequential Startup Configuration.

• Configurable for Single Output Parallel

Operation. (See Figure 4)

• 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

• TSSOP and HTSSOP (Exposed PAD) Packages

APPLICATIONS

• Embedded Computer Systems

• Navigation Systems

• Telecom Systems

• Set-Top Boxes

• WebPAD

• Point Of Load Power Architectures

DESCRIPTION

The LM5642 series consists of two current mode

synchronous buck regulator controllers operating

180° out of phase with each other at a normal

switching frequency of 200kHz for the LM5642 and at

375kHz for the LM5642X.

Out of phase operation reduces the input RMS ripple

current, thereby significantly reducing the required

input capacitance. The switching frequency can be

synchronized to an external clock between 150 kHz

and 250 kHz for the LM5642 and between 200 kHz

and 500 kHz for the LM5642X. The two switching

regulator outputs can also be paralleled to operate as

a dual-phase, single output regulator.

The output of each channel can be independently

adjusted from 1.3V to 90% of Vin. An internal 5V rail

is also available externally for driving bootstrap

circuitry.

Current-mode feedback control assures excellent line

and load regulation and 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.

The LM5642 features analog soft-start circuitry that is

independent of the output load and output

capacitance making the soft-start behavior more

predictable and controllable than traditional soft-start

circuits.

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.

供应商 型号 品牌 批号 封装 库存 备注 价格
NS/国半
22+
TSSOP28
10730
原装正品
询价
NS/国半
24+
HTSSOP28
9600
原装现货,优势供应,支持实单!
询价
TexasInstruments
18+
ICREGCTRLRBUCKPWM28ETSSO
6580
公司原装现货/欢迎来电咨询!
询价
TI
23+
28HTSSOP
9000
原装正品,支持实单
询价
NS
1512+
TSSOP28
880000
明嘉莱只做原装正品现货
询价
NS(国半)
25+
封装
500000
源自原厂成本,高价回收工厂呆滞
询价
TI德州仪器
22+
24000
原装正品现货,实单可谈,量大价优
询价
TI
24+
28-HTSSOP
66800
原厂授权一级代理,专注汽车、医疗、工业、新能源!
询价
NS
23+
TSSOP28
8160
原厂原装
询价
NS
20+
HTSSOP28
2960
诚信交易大量库存现货
询价