LMR61428

Name: LMR61428
Brand: TI
SKU: LMR61428
Price: 0.79 USD

現行

1.2V 至 14V 2.85A 2MHz 升壓穩壓器

立即訂購

產品規格表

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

LMR61428

現行

產品規格表

立即訂購

產品詳細資料

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Topology

Boost

Type

Converter

Vin (min) (V)

1.2

Vin (max) (V)

14

Switching frequency (min) (kHz)

300

Switching frequency (max) (kHz)

2000

Features

Enable, Nonsynchronous rectification

Vout (min) (V)

1.24

Vout (max) (V)

14

Iq (typ) (µA)

100

Duty cycle (max) (%)

70

Switch current limit (typ) (A)

2.85

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Topology

Boost

Type

Converter

Vin (min) (V)

1.2

Vin (max) (V)

14

Switching frequency (min) (kHz)

300

Switching frequency (max) (kHz)

2000

Features

Enable, Nonsynchronous rectification

Vout (min) (V)

1.24

Vout (max) (V)

14

Iq (typ) (µA)

100

Duty cycle (max) (%)

70

Switch current limit (typ) (A)

2.85

VSSOP (DGK)

8

14.7 mm² 3 x 4.9

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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	類型	標題		日期
*	Data sheet	LMR61428 Low Input Voltage, Step-Up DC-DC Converter datasheet (Rev. A)		2013年 4月 4日
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024年 3月 25日
	Application note	Basic Calculation of a Boost Converter's Power Stage (Rev. D)	PDF \| HTML	2022年 10月 28日
	Application note	Working With Boost Converters		2015年 6月 15日
	User guide	AN-2281 LMR61428 Evaluation Module (Rev. A)		2013年 4月 26日
	Application note	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		2013年 4月 24日
	Application note	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		2013年 4月 23日
	Application note	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		2013年 4月 23日
	Application note	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		2013年 4月 23日
	Application note	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		2013年 4月 23日
	Application note	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		2013年 4月 23日
	Application note	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		2013年 4月 23日
	Application note	Input and Output Capacitor Selection		2005年 9月 19日
	More literature	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		2005年 7月 12日
	Application note	AN-643 EMI/RFI Board Design (Rev. B)		2004年 5月 3日
	Application note	Understanding Boost Power Stages In Switchmode Power Supplies		1999年 3月 4日

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開發板

LMR61428XMMEVM — LMR61428 評估模組

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 (...)

使用指南: PDF