LM22676

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Regulador de tensión reductor de 3 A y 4.5 V a 42 V SIMPLE SWITCHER® con activación de precisión

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document-pdfAcrobat LM22676/-Q1 42 V, 3 A SIMPLE SWITCHER® Step-Down Voltage Regulator with Features datasheet (Rev. L) (Inglés) PDF | HTML

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LM22676

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Detalles del producto

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

3

Vin (min) (V)

4.5

Vin (max) (V)

42

Switching frequency (min) (kHz)

500

Switching frequency (max) (kHz)

500

Features

Enable, Over Current Protection

Control mode

Voltage mode

Vout (min) (V)

1.285

Vout (max) (V)

37

Iq (typ) (µA)

3400

Duty cycle (max) (%)

90

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

3

Vin (min) (V)

4.5

Vin (max) (V)

42

Switching frequency (min) (kHz)

500

Switching frequency (max) (kHz)

500

Features

Enable, Over Current Protection

Control mode

Voltage mode

Vout (min) (V)

1.285

Vout (max) (V)

37

Iq (typ) (µA)

3400

Duty cycle (max) (%)

90

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 PSOP-8 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
Precision Enable Pin
Integrated Boot-Strap Diode
Integrated Soft-Start
Fully WEBENCH^® Enabled
LM22676Q is an Automotive Grade Product
that is AEC-Q100 Grade 1 Qualified
(–40°C to +125°C Operating 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 PSOP-8 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
Precision Enable Pin
Integrated Boot-Strap Diode
Integrated Soft-Start
Fully WEBENCH^® Enabled
LM22676Q is an Automotive Grade Product
that is AEC-Q100 Grade 1 Qualified
(–40°C to +125°C Operating Junction
Temperature)
SO PowerPAD (Exposed Pad
PFM (Exposed Pad)

The LM22676 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. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). Built in soft-start (500 µs, typ) saves external components. The LM22676 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22676 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 LM22676 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. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). Built in soft-start (500 µs, typ) saves external components. The LM22676 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22676 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	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHER® Step-Down Voltage Regulator with Features datasheet (Rev. L)	PDF \| HTML	05 nov 2014
	White paper	Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A)	PDF \| HTML	30 abr 2024
	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
	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

LM22670EVAL — Regulador SIMPLE SWITCHER de 3 A con EVM de ajuste de frecuencia o sincronización y habilitación de

The LM22670 evaluation board is designed to demonstrate the capabilities of the LM22670 switching regulator. The LM22670 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 (...)

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