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DC/DC 切換穩壓器
DC/DC 轉換器

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

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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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LMR61428 Low Input Voltage, Step-Up DC-DC Converter datasheet (Rev. A) 2013/4/4
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
應用說明 Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 2022/10/28
應用說明 Working With Boost Converters 2015/6/15
應用說明 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013/4/24
應用說明 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013/4/23
應用說明 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013/4/23
應用說明 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013/4/23
應用說明 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013/4/23
應用說明 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013/4/23
應用說明 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013/4/23
應用說明 Input and Output Capacitor Selection 2005/9/19
更多文件說明 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005/7/12
應用說明 AN-643 EMI/RFI Board Design (Rev. B) 2004/5/3
應用說明 Understanding Boost Power Stages In Switchmode Power Supplies 1999/3/4

設計與開發

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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
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模擬型號

LMR61428 TINA Transient Model

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

LMR61428 TINA Transient Reference Design

SNVM649.ZIP (62 KB) - TINA-TI 參考設計
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模擬型號

LMR61428 Unencrypted PSpice Transient Model

SNVM947.ZIP (3 KB) - PSpice 模型
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模擬型號

LMR61428 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM050A.ZIP (66 KB) - PSpice 模型
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VSSOP (DGK) 8 Ultra Librarian
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