Datasheet > LM20143MH/NOPB

LM20143MH/NOPB

更新时间： 2024-09-24 11:13:03

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
39页	1268K
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具有调频功能的2.95V 至 5.5V、3A、电流模式同步降压稳压器 \| PWP \| 16 \| -40 to 125

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LM20143, LM20143-Q1

SNVS528H –OCTOBER 2007–REVISED JANUARY 2016

LM20143/LM20143-Q1 3-A PowerWise™ Adjustable Frequency Synchronous Buck

Regulator

1 Features

3 Description

The LM20143 devices are full featured PowerWise™

adjustable frequency synchronous buck regulators

capable of delivering up to 3 A of continuous output

current. The current mode control loop can be

compensated to be stable with virtually any type of

output capacitor. For most cases, compensating the

device only requires two external components,

providing maximum flexibility and ease of use. The

device is optimized to work over the input voltage

range of 2.95 V to 5.5 V, making it suited for a wide

variety of low voltage systems.

•

Available in AEC-Q100 Temperature Grade 1

Input Voltage Range: 2.95 V to 5.50 V

Accurate Current Limit Minimizes Inductor Size

97% Peak Efficiency

•

Adjustable Output Voltage Down to 0.80 V

Adjustable Switching Frequency (500 kHz to 1.5

MHz)

•

32-mΩ Integrated FET Switches

Starts into Prebiased Loads

The device features internal over voltage protection

(OVP) and over current protection (OCP) circuits for

increased system reliability. A precision enable pin

and integrated UVLO allows the turn-on of the device

to be tightly controlled and sequenced. Start-up

inrush currents are limited by both an internally fixed

and externally adjustable Soft-Start circuit. Fault

detection and supply sequencing is possible with the

integrated power good circuit.

Output Voltage Tracking

Peak Current Mode Control

Adjustable Soft-Start with External Capacitor

Precision Enable Pin with Hysteresis

Integrated OVP, UVLO, Power Good and Thermal

Shutdown

2 Applications

The frequency of this device can be adjusted from

500 kHz to 1.5 MHz by connecting an external

resistor from the RT pin to ground.

•

Simple to Design, High Efficiency Point of Load

Regulation from a 5-V or 3.3-V Bus

High Performance DSPs, FPGAs, ASICs, and

Microprocessors

The LM20143 is designed to work well in multi-rail

power supply architectures. The output voltage of the

device can be configured to track a higher voltage rail

using the SS/TRK pin. If the output of the LM20143 is

pre-biased at startup it will not sink current to pull the

output low until the internal soft-start ramp exceeds

the voltage at the feedback pin.

Broadband, Networking, and Optical

Communications Infrastructure

Device Information⁽¹⁾

PART NUMBER

LM20143

PACKAGE

BODY SIZE (NOM)

HTSSOP (16)

4.40 mm × 5.00 mm

LM20143-Q1

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application Circuit

LM20143

OUT

PVIN

FB1

OUT

AVIN

FB2

PGOOD

VCC

COMP

VCC

SS/TRK

PGND AGND

(optional)

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...39

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LM20143MH/NOPB 替代型号

型号	品牌	替代类型	描述	数据表
LM20143MHE/NOPB	TI	类似代替	具有调频功能的2.95V 至 5.5V、3A、电流模式同步降压稳压器 \| PWP \| 16
LM20143MHX/NOPB	TI	类似代替	具有调频功能的2.95V 至 5.5V、3A、电流模式同步降压稳压器 \| PWP \| 16

与LM20143MH/NOPB相关器件

型号	品牌	获取价格	描述	数据表
LM20143MHE	NSC	获取价格	3A, PowerWise㈢ Adjustable Frequency Synchrono
LM20143MHE/NOPB	TI	获取价格	具有调频功能的2.95V 至 5.5V、3A、电流模式同步降压稳压器 \| PWP \| 16
LM20143MHX	NSC	获取价格	3A, PowerWise㈢ Adjustable Frequency Synchrono
LM20143MHX/NOPB	TI	获取价格	具有调频功能的2.95V 至 5.5V、3A、电流模式同步降压稳压器 \| PWP \| 16
LM20143-Q1	TI	获取价格	具有调频功能的汽车级 2.95V 至 5.5V、3A、电流模式同步降压稳压器
LM20143QMH/NOPB	TI	获取价格	具有调频功能的汽车级 2.95V 至 5.5V、3A、电流模式同步降压稳压器 \| PWP
LM20143QMHE/NOPB	TI	获取价格	具有调频功能的汽车级 2.95V 至 5.5V、3A、电流模式同步降压稳压器 \| PWP
LM20143QMHX/NOPB	TI	获取价格	具有调频功能的汽车级 2.95V 至 5.5V、3A、电流模式同步降压稳压器 \| PWP
LM20144	NSC	获取价格	4A, PowerWise㈢ Adjustable Frequency Synchrono
LM20144	TI	获取价格	4A PowerWise Adjustable Frequency Synchronous Buck Regulator

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