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AC/DC & DC/DC converters (integrated FET)

LMR61428

現行

1.2V 至 14V 2.85A 2MHz 升壓穩壓器

立即訂購
產品規格表

LMR61428

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 1.2 Vin (max) (V) 14 Topology Boost Type Converter Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2000 Features Enable, Nonsynchronous rectification Vout (min) (V) 1.24 Vout (max) (V) 14 Rating Catalog Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0001
Vin (min) (V) 1.2 Vin (max) (V) 14 Topology Boost Type Converter Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2000 Features Enable, Nonsynchronous rectification Vout (min) (V) 1.24 Vout (max) (V) 14 Rating Catalog Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0001
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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技術文件

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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

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

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
TI.com 無法提供
模擬型號

LMR61428 TINA Transient Model

SNVM650.ZIP (16 KB) - TINA-TI Spice Model
下載
模擬型號

LMR61428 TINA Transient Reference Design

SNVM649.ZIP (62 KB) - TINA-TI Reference Design
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模擬型號

LMR61428 Unencrypted PSpice Transient Model

SNVM947.ZIP (3 KB) - PSpice Model
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模擬型號

LMR61428 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM050A.ZIP (66 KB) - PSpice Model
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參考設計

PMP30296 — 適用於低輸入電壓的微型 SEPIC 參考設計

This reference design is for input voltages from 1.8V to 9.6V and the output voltage is 3.3V with 200mA maximum. The LMR61428 works with constant duty-cycle (60%-70%) in burst mode.
Test report: PDF
電路圖: PDF
封裝 引腳 下載
VSSOP (DGK) 8 檢視選項
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