LM22678

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Regulador de tensión reductor de 5 A y 4.5 V a 42 V SIMPLE SWITCHER® con activación de precisión

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document-pdfAcrobat LM22678/-Q1 42-V, 5-A SIMPLE SWITCHER® Step-Down Voltage Regulator With Easy-to-Use Package datasheet (Rev. M) (Inglés) PDF | HTML

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LM22678

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Detalles del producto

Rating

Catalog

Topology

Buck

Iout (max) (A)

5

Vin (max) (V)

42

Vin (min) (V)

4.5

Vout (max) (V)

37

Vout (min) (V)

1.285

Features

Enable, Over Current Protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0034

Duty cycle (max) (%)

90

Rating

Catalog

Topology

Buck

Iout (max) (A)

5

Vin (max) (V)

42

Vin (min) (V)

4.5

Vout (max) (V)

37

Vout (min) (V)

1.285

Features

Enable, Over Current Protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0034

Duty cycle (max) (%)

90

TO-263 (NDR)

7

142.3416 mm² 10.16 x 14.01

New product available: LM61460 3-V to 36-V, 6-A low EMI synchronous converter
Wide input voltage range: 4.5 V to 42 V
Internally compensated voltage mode control
Stable with low-ESR ceramic capacitors
100-mΩ N-channel MOSFET
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 bootstrap diode
Integrated soft start
Fully WEBENCH enabled
LM22678-Q1 is an automotive-grade product that is AEC-Q100 grade 1 qualified (–40°C to +125°C operating junction temperature)
PFM (exposed pad) package

New product available: LM61460 3-V to 36-V, 6-A low EMI synchronous converter
Wide input voltage range: 4.5 V to 42 V
Internally compensated voltage mode control
Stable with low-ESR ceramic capacitors
100-mΩ N-channel MOSFET
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 bootstrap diode
Integrated soft start
Fully WEBENCH enabled
LM22678-Q1 is an automotive-grade product that is AEC-Q100 grade 1 qualified (–40°C to +125°C operating junction temperature)
PFM (exposed pad) package

The LM22678 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 that can provide up to 5 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 (typical). Built-in soft-start (500 µs, typical) saves external components. The LM22678 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The new product, LM61460, offers higher efficiency, lower stand-by quiescent current, and improved EMI performance. See the device comparison table to compare.Start WEBENCH design with LM61460

The LM22678 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 LM22678 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 that can provide up to 5 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 (typical). Built-in soft-start (500 µs, typical) saves external components. The LM22678 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The new product, LM61460, offers higher efficiency, lower stand-by quiescent current, and improved EMI performance. See the device comparison table to compare.Start WEBENCH design with LM61460

The LM22678 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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	Tipo	Título		Fecha
*	Data sheet	LM22678/-Q1 42-V, 5-A SIMPLE SWITCHER® Step-Down Voltage Regulator With Easy-to-Use Package datasheet (Rev. M)	PDF \| HTML	23 oct 2020
	Application note	SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. B)	PDF \| HTML	09 oct 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-2155 Layout Tips for EMI Reduction in DC/ DC Converters (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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