LM22673

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Regulador de tensión reductor de 3 A, 4.5 V a 42 V SIMPLE SWITCHER® con arranque suave ajustable y l

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document-pdfAcrobat LM22673/-Q1 42 V, 3 A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Features datasheet (Rev. O) (Inglés) PDF | HTML

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LM22673

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Detalles del producto

Iout (max) (A)

3

Vin (min) (V)

4.5

Vin (max) (V)

42

Topology

Buck

Type

Converter

Switching frequency (min) (kHz)

500

Switching frequency (max) (kHz)

500

Features

Adjustable current limit, Enable, Over Current Protection

Control mode

Voltage mode

Vout (min) (V)

1.285

Vout (max) (V)

37

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0034

Iout (max) (A)

3

Vin (min) (V)

4.5

Vin (max) (V)

42

Topology

Buck

Type

Converter

Switching frequency (min) (kHz)

500

Switching frequency (max) (kHz)

500

Features

Adjustable current limit, Enable, Over Current Protection

Control mode

Voltage mode

Vout (min) (V)

1.285

Vout (max) (V)

37

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0034

HSOIC (DDA)

8

29.4 mm² 4.9 x 6

TO-263 (NDR)

7

142.3416 mm² 10.16 x 14.01

Wide Input Voltage Range: 4.5 V to 42 V
Internally Compensated Voltage Mode Control
Stable with Low ESR Ceramic Capacitors
120 mΩ N-Channel MOSFET PFM Package
100 mΩ N-Channel MOSFET SO PowerPAD
Package
Output Voltage Options:
-ADJ (Outputs as Low as 1.285 V)
-5.0 (Output Fixed to 5 V)
±1.5% Feedback Reference Accuracy
Switching Frequency of 500 kHz
–40°C to 125°C Operating Junction
Temperature Range
Adjustable Soft-Start
Adjustable Current Limit
Integrated Boot-Strap Diode
Fully Webench^® Enabled
LM22673-Q1 is an Automotive Grade Product
that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
Junction Temperature)
SO PowerPAD (Exposed Pad)
PFM (Exposed Pad)

Wide Input Voltage Range: 4.5 V to 42 V
Internally Compensated Voltage Mode Control
Stable with Low ESR Ceramic Capacitors
120 mΩ N-Channel MOSFET PFM Package
100 mΩ N-Channel MOSFET SO PowerPAD
Package
Output Voltage Options:
-ADJ (Outputs as Low as 1.285 V)
-5.0 (Output Fixed to 5 V)
±1.5% Feedback Reference Accuracy
Switching Frequency of 500 kHz
–40°C to 125°C Operating Junction
Temperature Range
Adjustable Soft-Start
Adjustable Current Limit
Integrated Boot-Strap Diode
Fully Webench^® Enabled
LM22673-Q1 is an Automotive Grade Product
that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
Junction Temperature)
SO PowerPAD (Exposed Pad)
PFM (Exposed Pad)

The LM22673 switching regulator provides all of the functions necessary to implement an efficient high voltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42 V N-channel MOSFET switch capable of providing up to 3 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5 V output and adjustable output voltage options are available. A switching frequency of 500 kHz allows for small external components and good transient response. An adjustable soft-start feature is provided through the selection of a single external capacitor. In addition, the switch current limit can be programmed with a single external resistor, allowing solution optimization. The LM22673 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22673 device is a member of Texas Instruments’ SIMPLE SWITCHER^® family. The SIMPLE SWITCHER^® concept provides for an easy to use complete design using a minimum number of external components and the TI WEBENCH^® design tool. TI’s WEBENCH^® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.

The LM22673 switching regulator provides all of the functions necessary to implement an efficient high voltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42 V N-channel MOSFET switch capable of providing up to 3 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5 V output and adjustable output voltage options are available. A switching frequency of 500 kHz allows for small external components and good transient response. An adjustable soft-start feature is provided through the selection of a single external capacitor. In addition, the switch current limit can be programmed with a single external resistor, allowing solution optimization. The LM22673 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22673 device is a member of Texas Instruments’ SIMPLE SWITCHER^® family. The SIMPLE SWITCHER^® concept provides for an easy to use complete design using a minimum number of external components and the TI WEBENCH^® design tool. TI’s WEBENCH^® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.

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Documentación técnica

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	Tipo	Título		Fecha
*	Data sheet	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Features datasheet (Rev. O)	PDF \| HTML	05 nov 2014
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25 mar 2024
	Selection guide	Power Management Guide 2018 (Rev. R)		25 jun 2018
	Application note	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		12 sep 2014
	Application note	AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B)		06 may 2013
	Application note	AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A)		06 may 2013
	Application note	AN-1797 TO-263 THIN Package (Rev. A)		24 abr 2013
	Application note	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		24 abr 2013
	Application note	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		23 abr 2013
	Application note	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		23 abr 2013
	Application note	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		23 abr 2013
	Application note	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		23 abr 2013
	Application note	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		23 abr 2013
	Application note	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		23 abr 2013
	Application note	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		23 abr 2013
	EVM User's guide	AN-1894 LM22673 Evaluation Board (Rev. D)		23 abr 2013
	Application note	AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C)		23 abr 2013
	Application note	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		23 abr 2013
	Application note	SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. A)		23 abr 2013
	Design guide	SIMPLE SWITCHER® Design Guide		11 abr 2011
	Application note	Input and Output Capacitor Selection		19 sep 2005
	More literature	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		12 jul 2005
	Application note	AN-643 EMI/RFI Board Design (Rev. B)		03 may 2004

Diseño y desarrollo

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Placa de evaluación

LM22673EVAL — Regulador SIMPLE SWITCHER de 3 A con EVM de arranque suave ajustable y frecuencia de conmutación LM2

The LM22673 evaluation board is designed to demonstrate the capabilities of the LM22673 switching regulator. The LM22673 evaluation board is configured to provide an output voltage of 3.3V up to 3A load current with an input voltage range of 4.5V to 42V. Due to the low R_DS(ON) of the integrated (...)

Guía del usuario: PDF