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DC/DC 切換穩壓器
DC/DC 轉換器

LMR70503

現行

2.8V 至 5.5V、300mA 降壓/升壓負輸出電壓穩壓器

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產品規格表

LMR70503

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Inverting Vin (max) (V) 5.5 Vin (min) (V) 2.8 Vout (max) (V) -0.9 Vout (min) (V) -5.5 Switch current limit (typ) (A) 0.32 Features Enable Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0003 Duty cycle (max) (%) 90 Sector Test & measurement
Rating Catalog Topology Inverting Vin (max) (V) 5.5 Vin (min) (V) 2.8 Vout (max) (V) -0.9 Vout (min) (V) -5.5 Switch current limit (typ) (A) 0.32 Features Enable Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0003 Duty cycle (max) (%) 90 Sector Test & measurement
DSBGA (YFX) 8 1.8 mm² (— mm × — mm)
  • Tiny 8-Bump Thin DSBGA Package: 0.84 mm × 1.615 mm × 0.6 mm
  • 2.8 V to 5.5 V Input Voltage Range
  • Adjustable Output Voltage: -0.9 V to -5.5 V
  • 320 mA Switch Current Limit
  • 500 kHz Minimum Switching Frequency
  • Ground Referred Enable Input
  • Under Voltage Lock Out (UVLO)
  • No External Compensation
  • Internal Soft Start
  • 1 µA Shutdown Supply Current
  • Small Output Voltage Ripple
  • WEBENCH Enabled

Performance Benefits

  • Easy To Use
  • Tiny Overall Solution Size 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.

  • Tiny 8-Bump Thin DSBGA Package: 0.84 mm × 1.615 mm × 0.6 mm
  • 2.8 V to 5.5 V Input Voltage Range
  • Adjustable Output Voltage: -0.9 V to -5.5 V
  • 320 mA Switch Current Limit
  • 500 kHz Minimum Switching Frequency
  • Ground Referred Enable Input
  • Under Voltage Lock Out (UVLO)
  • No External Compensation
  • Internal Soft Start
  • 1 µA Shutdown Supply Current
  • Small Output Voltage Ripple
  • WEBENCH Enabled

Performance Benefits

  • Easy To Use
  • Tiny Overall Solution Size 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 LMR70503 is a buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin DSBGA package. Its unique control method is designed to provide fast transient response, low output noise, high efficiency, and tight regulation in the smallest possible PCB area. The LMR70503 has built in soft start, peak current limit, minimum switching frequency, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the Enable pin is referred to the IC ground, instead of the lowest potential of the IC: the negative output voltage.

The LMR70503 is a buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin DSBGA package. Its unique control method is designed to provide fast transient response, low output noise, high efficiency, and tight regulation in the smallest possible PCB area. The LMR70503 has built in soft start, peak current limit, minimum switching frequency, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the Enable pin is referred to the IC ground, instead of the lowest potential of the IC: the negative output voltage.

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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 LMR70503 Buck-Boost Converter For Negative Output Voltage in DSBGA datasheet (Rev. A) 2013/4/4
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
Application brief Buck-Boost Converters Solving Power Challenges in Optical Modules 2019/5/13
應用說明 Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019/3/12
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
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-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-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-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
應用說明 AN-643 EMI/RFI Board Design (Rev. B) 2004/5/3

設計與開發

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開發板

LMR70503EVM — LMR70503 評估模組

The LMR70503 is an inverting buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin micro SMD package (0.84 mm × 1.615 mm × 0.6 mm). Its unique control method is designed to provide fast transient response, low outputnoise, high efficiency, and tight regulation in the (...)
使用指南: PDF
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模擬型號

LMR70503 Unencrypted PSpice Transient Model

SNVM973.ZIP (3 KB) - PSpice 模型
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模擬型號

LMR70503 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM473A.ZIP (84 KB) - PSpice 模型
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參考設計

TIDA-00431 — 採用 8 GHz DC 耦合差動放大器的射頻取樣 4 GSPS ADC 參考設計

寬頻射頻 (RF) 接收器可大幅提高無線電設計的靈活性。寬廣的瞬時頻寬允許在不更換硬體的情況下進行靈活調諧，並能夠擷取頻率相差很大的多個通道。

此參考設計說明了一種寬頻 RF 接收器，它採用 4GSPS 類比數位轉換器 (ADC)，並具有 8GHz DC 耦合全差動放大器前端。放大器前端提供訊號增益，並允許擷取低至 DC 的訊號。這是使用平衡不平衡轉換器耦合輸入時無法實現的。

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參考設計

TIDA-00826 — 50 Ohm 2 GHz 示波器前端參考設計

此參考設計為 50Ω 輸入示波器應用類比前端的一部分。系統設計師可以輕鬆使用此評估平台，在頻域和時域應用中處理從 DC 至 2GHz 的輸入訊號。

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
DSBGA (YFX) 8 Ultra Librarian
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