LM2574HV

AKTIV

SIMPLE SWITCHER 0,5-A-Abwärts-Spannungsregler

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Datenblatt

document-pdfAcrobat LM2574/LM2574HV SIMPLE SWITCHER® 0.5-A Step-Down Voltage Regulator datasheet (Rev. F) (Englisch)

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1,5-A-Stromversorgungsmodul mit 60 V Eingang, 1-V- bis 16-V-Ausgang in verbessertem HotRod™ QFN-Gehä Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM2574HV

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Catalog

Topology

Buck

Iout (max) (A)

0.5

Vin (max) (V)

60

Vin (min) (V)

4

Vout (max) (V)

37

Vout (min) (V)

3.3

Features

Enable, Over Current Protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.005

Duty cycle (max) (%)

98

Rating

Catalog

Topology

Buck

Iout (max) (A)

0.5

Vin (max) (V)

60

Vin (min) (V)

4

Vout (max) (V)

37

Vout (min) (V)

3.3

Features

Enable, Over Current Protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.005

Duty cycle (max) (%)

98

SOIC (NPA)

14

92.8372375 mm² (8.9915 mm × 10.325 mm)

PDIP (P)

8

92.5083 mm² (9.81 mm × 9.43 mm)

New product available: TPS560430, 36-V, 600-mA synchronous step-down converter
3.3-V, 5-V, 12-V, 15-V, and adjustable output versions
Adjustable version output voltage range: 1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions
Specified 0.5-A output current
Wide input voltage range: 40 V, up to 60 V for HV Version
Requires only four external components
52-kHz Fixed-frequency internal oscillator
TTL shutdown capability, low-power standby mode
High efficiency
Uses readily available standard inductors
Thermal shutdown and current-limit protection
Create a custom design using the LM2574 with the WEBENCH^® Power Designer

New product available: TPS560430, 36-V, 600-mA synchronous step-down converter
3.3-V, 5-V, 12-V, 15-V, and adjustable output versions
Adjustable version output voltage range: 1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions
Specified 0.5-A output current
Wide input voltage range: 40 V, up to 60 V for HV Version
Requires only four external components
52-kHz Fixed-frequency internal oscillator
TTL shutdown capability, low-power standby mode
High efficiency
Uses readily available standard inductors
Thermal shutdown and current-limit protection
Create a custom design using the LM2574 with the WEBENCH^® Power Designer

The LM2574xx series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.

The LM2574xx series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed-circuit board (PCB) are normally the only heat sinking needed.

A standard series of inductors optimized for use with the LM2574 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

The TPS560430 is a newer generation buck converter, being functionally equivalent to LM2574. It offers reduced BOM cost, increased efficiency, and reduced solution size. See the Device Comparison Table to compare specifications. Start WEBENCH Design with TPS560430.

The LM2574xx series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.

The LM2574xx series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed-circuit board (PCB) are normally the only heat sinking needed.

A standard series of inductors optimized for use with the LM2574 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

The TPS560430 is a newer generation buck converter, being functionally equivalent to LM2574. It offers reduced BOM cost, increased efficiency, and reduced solution size. See the Device Comparison Table to compare specifications. Start WEBENCH Design with TPS560430.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Datenblatt	LM2574/LM2574HV SIMPLE SWITCHER® 0.5-A Step-Down Voltage Regulator datasheet (Rev. F)		17.04.2020
	Anwendungshinweis	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25.03.2024
	Technischer Artikel	How to increase system reliability and simplify design using DC/DC converters	PDF \| HTML	13.06.2016
	Technischer Artikel	The importance of accurate switching frequency and current limit when selecting bu	PDF \| HTML	19.04.2016
	Technischer Artikel	Advantages of leaded packages in robust industrial designs	PDF \| HTML	08.03.2016
	Anwendungshinweis	Cost-Effective Transformerless Offline Supply for Light Load Applications (Rev. A)		16.06.2015
	Anwendungshinweis	Cap Drop Offline Supply for E-Meters		16.06.2015
	Anwendungshinweis	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		12.09.2014
	Anwendungshinweis	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		24.04.2013
	Anwendungshinweis	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		23.04.2013
	Anwendungshinweis	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		23.04.2013
	Anwendungshinweis	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		23.04.2013
	Anwendungshinweis	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		23.04.2013
	Anwendungshinweis	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		23.04.2013
	Anwendungshinweis	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		23.04.2013
	Anwendungshinweis	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		23.04.2013
	Anwendungshinweis	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		23.04.2013
	Anwendungshinweis	Input and Output Capacitor Selection		19.09.2005
	Weitere Dokumente	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		12.07.2005
	Anwendungshinweis	AN-643 EMI/RFI Board Design (Rev. B)		03.05.2004

Design und Entwicklung

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