LM46000

AKTIV

Synchroner Abwärtsspannungswandler, 3,5 bis 60 V, 500 mA

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Datenblatt

document-pdfAcrobat LM46000 3.5-V to 60-V, 0.5-A Synchronous Step-Down Voltage Converter datasheet (Rev. B) (Englisch) PDF | HTML

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0,6-A-Synchron-Abwärtswandlerstrommodul, 3 bis 65 V Eingang, 1 bis 13 V Ausgang Smaller design with an integrated-inductor power module.

LM46000

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Catalog

Topology

Buck

Iout (max) (A)

0.5

Vin (max) (V)

60

Vin (min) (V)

3.5

Vout (max) (V)

28

Vout (min) (V)

1

Features

Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking

Control mode

current mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.000024

Duty cycle (max) (%)

99

Rating

Catalog

Topology

Buck

Iout (max) (A)

0.5

Vin (max) (V)

60

Vin (min) (V)

3.5

Vout (max) (V)

28

Vout (min) (V)

1

Features

Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking

Control mode

current mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.000024

Duty cycle (max) (%)

99

HTSSOP (PWP)

16

32 mm² 5 x 6.4

24-µA Quiescent Current in Regulation
High Efficiency at Light Load (DCM and PFM)
Meets EN55022/CISPR 22 EMI standards
Integrated Synchronous Rectification
Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)
Frequency Synchronization to External Clock
Internal Compensation
Stable With Almost Any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
Power-Good Flag
Soft-Start into Prebiased Load
Internal Soft Start: 4.1 ms
Extendable Soft-Start Time by External Capacitor
Output Voltage Tracking Capability
Precision Enable to Program System UVLO
Output Short-Circuit Protection With Hiccup Mode
Overtemperature Thermal Shutdown Protection
Create a Custom Design Using the LM46000 With the WEBENCH^® Power Designer

24-µA Quiescent Current in Regulation
High Efficiency at Light Load (DCM and PFM)
Meets EN55022/CISPR 22 EMI standards
Integrated Synchronous Rectification
Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)
Frequency Synchronization to External Clock
Internal Compensation
Stable With Almost Any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
Power-Good Flag
Soft-Start into Prebiased Load
Internal Soft Start: 4.1 ms
Extendable Soft-Start Time by External Capacitor
Output Voltage Tracking Capability
Precision Enable to Program System UVLO
Output Short-Circuit Protection With Hiccup Mode
Overtemperature Thermal Shutdown Protection
Create a Custom Design Using the LM46000 With the WEBENCH^® Power Designer

The LM46000 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 500 mA of load current from an input voltage range of 3.5 V to 60 V. The LM46000 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size. An extended family is available in 1 A and 2 A load current options in pin-to-pin compatible packages. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft start, extendable soft start, and tracking provide a flexible and easy-to-use platform for a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The family requires few external components and pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, V_CC undervoltage lockout, cycle-by-cycle current limit, and output short-circuit protection. The LM46000 device is available in the 16-pin leaded HTSSOP (PWP) package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch. Pin-to-pin compatible with LM46001, LM46002, LM43603, LM43602, LM43601, and LM43600.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Data sheet	LM46000 3.5-V to 60-V, 0.5-A Synchronous Step-Down Voltage Converter datasheet (Rev. B)	PDF \| HTML	22 Mär 2018
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25 Mär 2024
	Application note	Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)		12 Mär 2019
	Application note	Differences Between LM4600x/LM4360x A and Non-A OPNs		27 Mär 2018
	White paper	Synchronous Rectification in High-Performance Power Converter Design (Rev. A)		15 Sep 2016
	More literature	SIMPLE SWITCHER Synchronous Regulator Series (Rev. B)		08 Feb 2016
	Application note	Cap Drop Offline Supply for E-Meters		16 Jun 2015
	Application note	Cost-Effective Transformerless Offline Supply for Light Load Applications (Rev. A)		16 Jun 2015
	Technical article	Inverting made simple by unleashing the buck	PDF \| HTML	19 Mai 2015
	Application note	Inverting Applications Made SIMPLE With LM4600x and LM4360x (Rev. B)		20 Feb 2015
	Application note	Thermal Design Made Simple With LM43603 and LM46002		15 Sep 2014
	Application note	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		12 Sep 2014
	Application note	Compensation Made SIMPLE With LM4360x, LM4600x		29 Jul 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-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
	Application note	Understanding and Applying Current-Mode Control Theory		19 Aug 2007
	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

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM46000PWPEVM — LM46000PWP Synchron-Abwärtswandler – Evaluierungsmodul

The LM46000PWPEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM46000PWP synchronous step-down converter. The EVM operates from a 3.5V to 60V input and provides a 3.3V output at 0.5A.

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