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LM5642XMT/NOPB

更新时间： 2024-11-22 12:02:15

品牌	Logo	应用领域
德州仪器 - TI		振荡器转换器稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数	文件大小	规格书
40页	1403K
描述
LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization

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LM5642XMT/NOPB 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SSOP
包装说明：	TSSOP,	针数：	28
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	1 week
风险等级：	1.57	Is Samacsys：	N
其他特性：	ALSO OPERATES IN ADJUSTABLE MODE FROM 1.3V TO 32.4	模拟集成电路 - 其他类型：	DUAL SWITCHING CONTROLLER
控制模式：	CURRENT-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	36 V	最小输入电压：	4.5 V
标称输入电压：	5 V	JESD-30 代码：	R-PDSO-G28
JESD-609代码：	e3	长度：	9.7 mm
湿度敏感等级：	3	功能数量：	1
端子数量：	28	最高工作温度：	125 °C
最低工作温度：	-40 °C	最大输出电流：	20 A
最大输出电压：	34 V	最小输出电压：	1.236 V
标称输出电压：	5 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	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
座面最大高度：	1.2 mm	表面贴装：	YES
切换器配置：	PUSH-PULL	最大切换频率：	500 kHz
温度等级：	AUTOMOTIVE	端子面层：	Matte Tin (Sn)
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：	NOT SPECIFIED
宽度：	4.4 mm	Base Number Matches：	1

LM5642XMT/NOPB 数据手册

LM5642, LM5642X

www.ti.com

SNVS219K –JUNE 2003–REVISED APRIL 2013

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

Synchronization

Check for Samples: LM5642, LM5642X

FEATURES

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.

•

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

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.

•

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

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 Control with or without a Sense

Resistor

Independent Enable/Soft-start Pins Allow

Simple Sequential Startup Configuration.

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.

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

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.

Self Discharge of Output Capacitors when the

Regulator is OFF

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.

•

TSSOP and HTSSOP (Exposed PAD) Packages

APPLICATIONS

•

Embedded Computer Systems

Navigation Systems

Telecom Systems

Typical Application Circuit

4.5V - 36V

Set-Top Boxes

UV_Delay

Vout1

1.3V-0.9V_IN

WebPAD

SYNC

Point Of Load Power Architectures

LM5642/LM5642X

SS/ON1

SS/ON2

Vout2

1.3V-0.9V_IN

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...40

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LM5642XMT/NOPB 替代型号

型号	品牌	替代类型	描述	数据表
LM5642XMTX/NOPB	TI	完全替代	LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronizati
LM5642XMT	TI	类似代替	LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronizati

与LM5642XMT/NOPB相关器件

型号	品牌	获取价格	描述	数据表
LM5642XMTX	TI	获取价格	LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronizati
LM5642XMTX/NOPB	TI	获取价格	LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronizati
LM5643R11	ETC	获取价格	Optoelectronic
LM5644R11	ETC	获取价格	Optoelectronic
LM565	NSC	获取价格	Phase Locked Loop
LM565C	ETC	获取价格
LM565CH	ETC	获取价格	Analog Phase-Locked Loop
LM565CMDC	NSC	获取价格	IC PHASE LOCKED LOOP, UUC, DIE, PLL or Frequency Synthesis Circuit
LM565CMWC	NSC	获取价格	IC PHASE LOCKED LOOP, UUC, WAFER, PLL or Frequency Synthesis Circuit
LM565CN	NSC	获取价格	Phase Locked Loop

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