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LMR70503

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2.8V 至 5.5V、300mA 降压/升压负输出稳压器

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数据表

LMR70503

正在供货
数据表 立即订购

产品详情

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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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LMR70503 Buck-Boost Converter For Negative Output Voltage in DSBGA 数据表 (Rev. A) 2013-4-4
应用手册 半导体和 IC 封装热指标 (Rev. D) PDF | HTML 英语版 (Rev.D) PDF | HTML 2024-4-24
应用简报 可解决光学模块电源难题的降压/升压转换器 英语版 2019-7-5
应用手册 Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019-3-12
选择指南 电源管理指南 2018 2018-7-31
应用手册 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013-4-24
应用手册 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013-4-23
应用手册 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013-4-23
应用手册 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013-4-23
应用手册 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013-4-23
应用手册 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013-4-23
应用手册 Input and Output Capacitor Selection 2005-9-19
应用手册 AN-643 EMI/RFI Board Design (Rev. B) 2004-5-3

设计与开发

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评估板

LMR70503EVM — LMR70503 评估模块

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 (...)
用户指南: PDF
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仿真模型

LMR70503 Unencrypted PSpice Transient Model

SNVM973.ZIP (3 KB) - PSpice 模型
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仿真模型

LMR70503 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM473A.ZIP (84 KB) - PSpice 模型
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参考设计

TIDA-00431 — 采用 8GHz 直流耦合差分放大器的射频采样 4GSPS ADC 参考设计

宽带射频 (RF) 接收器有助于极大提高无线电设计的灵活性。较宽的瞬时带宽支持在不更改硬件的情况下实现灵活调优，并且能够以间隔较大的频率捕获多个通道。

该参考设计介绍了一款宽带射频接收器，该接收器采用 4GSPS 模数转换器 (ADC) 并具有一个 8GHz 直流耦合全差分放大器前端。放大器前端提供信号增益，并且能够捕获下行到直流的信号，而平衡-非平衡变压器耦合输入则无法做到这一点。

支持的产品和硬件
参考设计

TIDA-00826 — 50 欧姆 2GHz 示波器前端参考设计

此参考设计是 50Ω 输入示波器应用的模拟前端的一部分。系统设计人员可随时使用此评估平台，处理频域和时域应用中从直流到 2GHz 的输入信号。

支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
DSBGA (YFX) 8 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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