LMR61428

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Aufwärts-Spannungsregler, 1,2 bis 14V, 2,85 A, 2 MHz

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Datenblatt

document-pdfAcrobat LMR61428 Low Input Voltage, Step-Up DC-DC Converter datasheet (Rev. A) (Englisch)

LMR61428

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Catalog

Topology

Boost, SEPIC

Vin (max) (V)

14

Vin (min) (V)

1.2

Vout (max) (V)

14

Vout (min) (V)

1.24

Switch current limit (typ) (A)

2.85

Features

Enable, Nonsynchronous rectification

Operating temperature range (°C)

-40 to 85

Iq (typ) (A)

0.0001

Duty cycle (max) (%)

70

Rating

Catalog

Topology

Boost, SEPIC

Vin (max) (V)

14

Vin (min) (V)

1.2

Vout (max) (V)

14

Vout (min) (V)

1.24

Switch current limit (typ) (A)

2.85

Features

Enable, Nonsynchronous rectification

Operating temperature range (°C)

-40 to 85

Iq (typ) (A)

0.0001

Duty cycle (max) (%)

70

VSSOP (DGK)

8

14.7 mm² (3 mm × 4.9 mm)

1.2V to 14V Input Voltage
Adjustable Output Voltage up to 14V
Switch Current up to 2.85A
Up to 2 MHz Switching Frequency
Low Shutdown Iq, <1µA
Cycle-by-Cycle Current Limiting
VSSOP Packaging (3.0 x 5.0 x 1.09mm)
WEBENCH Enabled

Performance Benefits

Extremely Easy to Use
Tiny Overall Solution Reduces System Cost

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

1.2V to 14V Input Voltage
Adjustable Output Voltage up to 14V
Switch Current up to 2.85A
Up to 2 MHz Switching Frequency
Low Shutdown Iq, <1µA
Cycle-by-Cycle Current Limiting
VSSOP Packaging (3.0 x 5.0 x 1.09mm)
WEBENCH Enabled

Performance Benefits

Extremely Easy to Use
Tiny Overall Solution Reduces System Cost

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

The LMR61428 is a step-up DC-DC switching regulator for battery-powered and low input voltage systems that can achieve efficiencies up to 90%. It has a wide input voltage range from 1.2V to 14V and a possible regulated output voltage range of 1.24V to 14V. It has an internal 0.17Ω N-Channel MOSFET power switch.

The high switching frequency of up to 2MHz of the LMR61428 allows for tiny surface mount inductors and capacitors. Because of the unique constant-duty-cycle gated oscillator topology very high efficiencies are realized over a wide load range. The supply current is reduced to 80µA because of the BiCMOS process technology. In the shutdown mode, the supply current is less than 2.5µA. The LMR61428 is available in a VSSOP-8 package.

The LMR61428 is a step-up DC-DC switching regulator for battery-powered and low input voltage systems that can achieve efficiencies up to 90%. It has a wide input voltage range from 1.2V to 14V and a possible regulated output voltage range of 1.24V to 14V. It has an internal 0.17Ω N-Channel MOSFET power switch.

The high switching frequency of up to 2MHz of the LMR61428 allows for tiny surface mount inductors and capacitors. Because of the unique constant-duty-cycle gated oscillator topology very high efficiencies are realized over a wide load range. The supply current is reduced to 80µA because of the BiCMOS process technology. In the shutdown mode, the supply current is less than 2.5µA. The LMR61428 is available in a VSSOP-8 package.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Datenblatt	LMR61428 Low Input Voltage, Step-Up DC-DC Converter datasheet (Rev. A)		04.04.2013
	Anwendungshinweis	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25.03.2024
	Anwendungshinweis	Basic Calculation of a Boost Converter's Power Stage (Rev. D)	PDF \| HTML	28.10.2022
	Anwendungshinweis	Working With Boost Converters		15.06.2015
	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-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
	Anwendungshinweis	Understanding Boost Power Stages In Switchmode Power Supplies		04.03.1999

Design und Entwicklung

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Evaluierungsplatine

LMR61428XMMEVM — LMR61428-Evaluierungsmodul

IntroductionThe LMR61428 evaluation module is designed to provide the power supply design engineer with a fully functional regulatordesign. The evaluation module takes the input from a single Li-Ion battery and boosts the voltage up to 5V at a constant loadcapability of 500mA. The switching (...)

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