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

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

Vin (min) (V) 2.8 Vin (max) (V) 5.5 Topology Inverting Type Converter Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1000 Features Enable Vout (min) (V) -5.5 Vout (max) (V) -0.9 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0003
Vin (min) (V) 2.8 Vin (max) (V) 5.5 Topology Inverting Type Converter Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1000 Features Enable Vout (min) (V) -5.5 Vout (max) (V) -0.9 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0003
DSBGA (YFX) 8 1.8 mm² 1.8 x 1
  • 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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類型 標題 日期
* Data sheet LMR70503 Buck-Boost Converter For Negative Output Voltage in DSBGA 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 brief Buck-Boost Converters Solving Power Challenges in Optical Modules 2019年 5月 13日
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019年 3月 12日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
EVM User's guide AN-2264 LMR70503 Demo Board (Rev. A) 2013年 4月 25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-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
Application note AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3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

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
TI.com 無法提供
模擬型號

LMR70503 Unencrypted PSpice Transient Model

SNVM973.ZIP (3 KB) - PSpice Model
下載
模擬型號

LMR70503 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM473A.ZIP (84 KB) - PSpice Model
下載
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

Wideband radio frequency (RF) receivers allow greatly increased flexibility in radio designs. The wide instantaneous bandwidth allows flexible tuning without changing hardware and the ability to capture multiple channels at widely separated frequencies.

This reference design describes a wideband RF (...)

Design guide: PDF
電路圖: PDF
參考設計

TIDA-00826 — 50 Ohm 2 GHz 示波器前端參考設計

This reference design is part of an analog front-end for 50Ω-input oscilloscope application. System designers can readily use this evaluation platform to process input signals from DC to 2 GHz in both frequency-domain and time-domain applications.
Design guide: PDF
電路圖: PDF
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