LM2673

활성

8V~40V, 3A SIMPLE SWITCHER® 벅 컨버터(전류 제한 조정 가능)

지금 주문하기

데이터 시트

document-pdfAcrobat LM2673 SIMPLE SWITCHER® 3-A Step-Down Voltage Regulator With Adjustable Current Limit datasheet (Rev. O) (영어) PDF | HTML

이 제품의 최신 버전이 있습니다

open-in-new

대안 비교

다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능.

LMR51430

활성

40µA IQ를 지원하는 SIMPLE SWITCHER® 4.5V~36V, 3A 동기 벅 컨버터 New converter in SOT-23 package

TLVM13630

활성

고밀도, 3V~36V 입력, 1V~6V 출력, 3A 스텝다운 전원 모듈 Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM2673

활성

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지금 주문하기

제품 상세 정보

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

40

Vin (min) (V)

8

Vout (max) (V)

37

Vout (min) (V)

1.23

Features

Enable, Overcurrent protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0042

Duty cycle (max) (%)

91

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

40

Vin (min) (V)

8

Vout (max) (V)

37

Vout (min) (V)

1.23

Features

Enable, Overcurrent protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0042

Duty cycle (max) (%)

91

VSON (NHM)

14

30 mm² (6 mm × 5 mm)

TO-220 (NDZ)

7

82.6008 mm² (10.16 mm × 8.13 mm)

TO-263 (KTW)

7

153.924 mm² (10.1 mm × 15.24 mm)

Efficiency Up to 94%
Simple and Easy to Design With (Using Off-The-
Shelf External Components)
Resistor Programmable Peak Current Limit Over a
Range of 2 A to 5 A
150-mΩ DMOS Output Switch
3.3-V, 5-V, 12-V Fixed Output and Adjustable
(1.2 V to 37 V) Versions
±2% Maximum Output Tolerance Over Full Line
and Load Conditions
Wide Input Voltage Range: 8 V to 40 V
260-KHz Fixed Frequency Internal Oscillator
Soft-Start Capability
–40 to 125°C Operating Junction Temperature
Range

Efficiency Up to 94%
Simple and Easy to Design With (Using Off-The-
Shelf External Components)
Resistor Programmable Peak Current Limit Over a
Range of 2 A to 5 A
150-mΩ DMOS Output Switch
3.3-V, 5-V, 12-V Fixed Output and Adjustable
(1.2 V to 37 V) Versions
±2% Maximum Output Tolerance Over Full Line
and Load Conditions
Wide Input Voltage Range: 8 V to 40 V
260-KHz Fixed Frequency Internal Oscillator
Soft-Start Capability
–40 to 125°C Operating Junction Temperature
Range

The LM2673 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version.

The SIMPLE SWITCHER^® concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260 kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2673 are available from several manufacturers to greatly simplify the design process.

Other features include the ability to reduce the input surge current at power on by adding a soft-start timing capacitor to gradually turn on the regulator. The LM2673 series also has built-in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

The LM2673 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version.

The SIMPLE SWITCHER^® concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260 kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2673 are available from several manufacturers to greatly simplify the design process.

Other features include the ability to reduce the input surge current at power on by adding a soft-start timing capacitor to gradually turn on the regulator. The LM2673 series also has built-in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

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기술 자료

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20개 모두 보기

상위 문서	유형	직함	형식 옵션	날짜
*	데이터 시트	LM2673 SIMPLE SWITCHER® 3-A Step-Down Voltage Regulator With Adjustable Current Limit datasheet (Rev. O)	PDF \| HTML	2016. 6. 30
	애플리케이션 노트	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024. 3. 25
	기술 문서	DC/DC converter datasheets - Calculate system losses	PDF \| HTML	2016. 5. 2
	기술 문서	DC/DC converter datasheets – System losses demystified	PDF \| HTML	2016. 4. 25
	기술 문서	DC/DC converter datasheets – System efficiency demystified	PDF \| HTML	2016. 4. 18
	애플리케이션 노트	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		2014. 9. 12
	애플리케이션 노트	AN-1187 Leadless Leadframe Package (LLP) (Rev. R)		2013. 5. 7
	애플리케이션 노트	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		2013. 4. 24
	애플리케이션 노트	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		2013. 4. 23
	애플리케이션 노트	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		2013. 4. 23
	애플리케이션 노트	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		2013. 4. 23
	애플리케이션 노트	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		2013. 4. 23
	애플리케이션 노트	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		2013. 4. 23
	애플리케이션 노트	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		2013. 4. 23
	애플리케이션 노트	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		2013. 4. 23
	애플리케이션 노트	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		2013. 4. 23
	애플리케이션 노트	Simple Techniques Minimize Cross-Coupling in Distributed Power Systems		2007. 3. 21
	애플리케이션 노트	Input and Output Capacitor Selection		2005. 9. 19
	추가 자료	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		2005. 7. 12
	애플리케이션 노트	AN-643 EMI/RFI Board Design (Rev. B)		2004. 5. 3