LM22678

AKTIV

SIMPLE SWITCHER®-Abwärtsspannungsregler mit 4,5 V bis 42 V, 5 A und Präzisionsfreigabe

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Datenblatt

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

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TPSM63606

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LM22678

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

5

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)

5

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

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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Technische Dokumentation

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Alle anzeigen 21

	Typ	Titel		Datum
*	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 Okt 2020
	Application note	SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. B)	PDF \| HTML	09 Okt 2024
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25 Mär 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 Mai 2013
	Application note	AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A)		06 Mai 2013
	Application note	AN-1797 TO-263 THIN Package (Rev. A)		24 Apr 2013
	Application note	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		24 Apr 2013
	Application note	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		23 Apr 2013
	Application note	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		23 Apr 2013
	Application note	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		23 Apr 2013
	Application note	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		23 Apr 2013
	Application note	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		23 Apr 2013
	Application note	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		23 Apr 2013
	Application note	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		23 Apr 2013
	Application note	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		23 Apr 2013
	Design guide	SIMPLE SWITCHER® Design Guide		11 Apr 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 Mai 2004

Design und Entwicklung

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