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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM3102

現行

同步 1MHz 2.5A 降壓電壓穩壓器

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LMR33630 現行 具有超低 EMI 的 SIMPLE SWITCHER® 3.8V 至 36V、3A 同步降壓轉換器 Smaller footprint, higher efficiency, lower IQ and lower EMI.

LM3102

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 125 Topology Buck Type Converter Iout (max) (A) 2.5 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection, Synchronous Rectification, Tracking Control mode COT with emulated ripple Vout (min) (V) 0.8 Vout (max) (V) 7 Iq (typ) (µA) 1000 Duty cycle (max) (%) 94
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2.5 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection, Synchronous Rectification, Tracking Control mode COT with emulated ripple Vout (min) (V) 0.8 Vout (max) (V) 7 Iq (typ) (µA) 1000 Duty cycle (max) (%) 94
DSBGA (YPA) 28 0.5625 mm² 0.75 x 0.75 HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • Low Component Count and Small Solution Size
  • Stable With Ceramic and Other Low-ESR Capacitors
  • No Loop Compensation Required
  • High Efficiency at a Light Load by DCM Operation
  • Prebias Start-Up
  • Ultra-Fast Transient Response
  • Programmable Soft-Start
  • Programmable Switching Frequency up to 1 MHz
  • Valley Current Limit
  • Output Overvoltage Protection
  • Precision Internal Reference for an Adjustable Output Voltage Down to 0.8 V
  • Thermal Shutdown
  • Key Specifications
    • Input Voltage Range 4.5 V to 42 V
    • 2.5-A Output Current
    • 0.8 V, ±1.5% Reference
    • Integrated Dual N-Channel Main and Synchronous MOSFETs
    • Thermally Enhanced HTSSOP-20 Package
  • Low Component Count and Small Solution Size
  • Stable With Ceramic and Other Low-ESR Capacitors
  • No Loop Compensation Required
  • High Efficiency at a Light Load by DCM Operation
  • Prebias Start-Up
  • Ultra-Fast Transient Response
  • Programmable Soft-Start
  • Programmable Switching Frequency up to 1 MHz
  • Valley Current Limit
  • Output Overvoltage Protection
  • Precision Internal Reference for an Adjustable Output Voltage Down to 0.8 V
  • Thermal Shutdown
  • Key Specifications
    • Input Voltage Range 4.5 V to 42 V
    • 2.5-A Output Current
    • 0.8 V, ±1.5% Reference
    • Integrated Dual N-Channel Main and Synchronous MOSFETs
    • Thermally Enhanced HTSSOP-20 Package

The LM3102 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost-effective buck regulator. The device can supply 2.5 A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3102 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low-ESR output capacitors. The device requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the ON-time. The operating frequency can be externally programmed up to
1 MHz. Protection features include VCC undervoltage lockout (UVLO), output overvoltage protection, thermal shutdown, and gate drive UVLO. The LM3102 is available in the thermally enhanced HTSSOP-20 package, and LM3102 is also available in a DSBGA low-profile chip-scale package with reduced output current.

The LM3102 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost-effective buck regulator. The device can supply 2.5 A to loads with an output voltage as low as 0.8 V. Dual N-channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3102 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low-ESR output capacitors. The device requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the ON-time. The operating frequency can be externally programmed up to
1 MHz. Protection features include VCC undervoltage lockout (UVLO), output overvoltage protection, thermal shutdown, and gate drive UVLO. The LM3102 is available in the thermally enhanced HTSSOP-20 package, and LM3102 is also available in a DSBGA low-profile chip-scale package with reduced output current.

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類型 標題 日期
* Data sheet LM3102 Synchronous 1-MHz, 2.5-A Step-Down Voltage Regulator datasheet (Rev. I) PDF | HTML 2018年 1月 23日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
White paper Synchronous Rectification in High-Performance Power Converter Design (Rev. A) 2016年 9月 15日
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
User guide AN-1646 LM3102 Demonstration Board Reference Design (Rev. A) 2013年 4月 29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-1197 Selecting Inductors for Buck Converters (Rev. B) 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-1246 Stresses in Wide Input DC-DC Converters (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 AN-2200 Precision Current Limiting with the LMP8646 and LMZ12003 (Rev. A) 2013年 4月 23日
Application note AN-2218 Precision Current Limiting with the LMP8646 and LM3102 (Rev. A) 2013年 4月 23日
User guide AN-1646 LM3102 Demonstration Board Reference Design 2007年 10月 1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

設計與開發

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開發板

LM3102EVAL — SIMPLE SWITCHER® 同步 1 MHz 2.5A 降壓穩壓器評估模組

  • Low component count and small solution size
  • Stable with ceramic and other low ESR capacitors
  • No loop compensation required
  • High efficiency at a light load by DCM operation
  • Pre-bias startup
  • Ultra-fast transient response
  • Programmable soft-start
  • Programmable switching frequency up to 1 MHz
  • Valley current (...)
使用指南: PDF
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模擬型號

LM3102 PSpice Transient Model

SNVM096.ZIP (225 KB) - PSpice Model
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模擬型號

LM3102 TINA-TI Line Transient Reference Design

SNVM068.TSC (186 KB) - TINA-TI Reference Design
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模擬型號

LM3102 TINA-TI Load Transient Reference Design

SNVM070.TSC (185 KB) - TINA-TI Reference Design
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模擬型號

LM3102 TINA-TI Startup Transient Reference Design

SNVM071.TSC (211 KB) - TINA-TI Reference Design
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模擬型號

LM3102 TINA-TI Steady Transient Reference Design

SNVM069.TSC (209 KB) - TINA-TI Reference Design
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模擬型號

LM3102 TINA-TI Transient Spice Model

SNVM067.ZIP (17 KB) - TINA-TI Spice Model
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模擬型號

LM3102 Unencrypted PSpice Transient Model

SNVM920.ZIP (3 KB) - PSpice Model
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
DSBGA (YPA) 28 Ultra Librarian
HTSSOP (PWP) 20 Ultra Librarian
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