主页 电源管理 直流/直流开关稳压器 DC/DC converters
主页
电源管理
直流/直流开关稳压器
DC/DC converters

LMR14203

正在供货

采用 SOT-23 封装的 4.5V 至 42V、0.3A 降压直流/直流开关稳压器

立即订购
数据表

可提供此产品的更新版本

open-in-new 比较替代产品
功能与比较器件相同且具有相同引脚。
TPS560430 正在供货 4V 至 36V 0.6A 同步降压 SIMPLE SWITCHER® 电源转换器 Smaller footprint, FPWM and PFM option.
功能与比较器件相同但引脚有所不同。
TPSM560R6H 正在供货 采用 5mm x 5.5mm x 4mm QFN 封装的 4.2V 至 60V 输入、1V 至 16V 输出、0.6A 降压模块 Smaller design with an integrated-inductor power module.

LMR14203

正在供货
立即订购

产品详情

Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 34 Vout (min) (V) 0.765 Features Enable, Overcurrent protection Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0013 Duty cycle (max) (%) 87
Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 34 Vout (min) (V) 0.765 Features Enable, Overcurrent protection Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0013 Duty cycle (max) (%) 87
SOT-23-THN (DDC) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • Input Voltage Range of 4.5V to 42V
  • Output Voltage Range of 0.765V to 34V
  • Output Current up to 0.3A
  • 1.25 MHz Switching Frequency
  • Low Shutdown Iq, 16 µA Typical
  • Short Circuit Protected
  • Internally Compensated
  • Soft-Start Function
  • Thin SOT-23-6 Package (2.97 x 1.65 x 1mm)
  • Fully Enabled for WEBENCH® Power Designer

Performance Benefits

  • Tight Accuracy for Powering Digital ICs
  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost

All trademarks are the property of their respective owners.

  • Input Voltage Range of 4.5V to 42V
  • Output Voltage Range of 0.765V to 34V
  • Output Current up to 0.3A
  • 1.25 MHz Switching Frequency
  • Low Shutdown Iq, 16 µA Typical
  • Short Circuit Protected
  • Internally Compensated
  • Soft-Start Function
  • Thin SOT-23-6 Package (2.97 x 1.65 x 1mm)
  • Fully Enabled for WEBENCH® Power Designer

Performance Benefits

  • Tight Accuracy for Powering Digital ICs
  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost

All trademarks are the property of their respective owners.

The LMR14203 is a PWM DC/DC buck (step-down) regulator. With a wide input range from 4.5V-42V, it is suitable for a wide range of applications such as power conditioning from unregulated sources. They feature a low RDSON (0.9Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 1.25 MHz allowing the use of small external components while still being able to have low output voltage ripple. Soft-start can be implemented using the shutdown pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LMR14203 is optimized for up to 300 mA load current.

Additional features include: thermal shutdown, VIN under-voltage lockout, and gate drive under-voltage lockout. The LMR14203 is available in a low profile SOT-6L package.

The LMR14203 is a PWM DC/DC buck (step-down) regulator. With a wide input range from 4.5V-42V, it is suitable for a wide range of applications such as power conditioning from unregulated sources. They feature a low RDSON (0.9Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 1.25 MHz allowing the use of small external components while still being able to have low output voltage ripple. Soft-start can be implemented using the shutdown pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LMR14203 is optimized for up to 300 mA load current.

Additional features include: thermal shutdown, VIN under-voltage lockout, and gate drive under-voltage lockout. The LMR14203 is available in a low profile SOT-6L package.
filter 查找其他 DC/DC converters
下载 观看带字幕的视频 视频

技术文档

未找到结果。请清除搜索并重试。
查看全部 19
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 SIMPLE SWITCHER 42Vin, 0.3A Step-Dwn V-Reg in SOT-23 数据表 (Rev. C) 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
选择指南 电源管理指南 2018 2018-7-31
技术文章 Quantifying the value of wide VIN PDF | HTML 2016-6-15
技术文章 DC/DC converter datasheets – System losses demystified PDF | HTML 2016-4-25
技术文章 DC/DC converter datasheets – System efficiency demystified PDF | HTML 2016-4-18
应用手册 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014-9-12
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-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-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013-4-23
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-1197 Selecting Inductors for Buck Converters (Rev. B) 2013-4-23
应用手册 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 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
更多文献资料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005-7-12
应用手册 AN-643 EMI/RFI Board Design (Rev. B) 2004-5-3

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

LMR14203XMKDEMO — LMR14203 Simple Switcher® 小尺寸 42V 降压稳压器 300 mA 演示板

The LMR14203/06 is a PWM DC/DC buck (step-down) regulator. With a wide input range from 4.5V-42V, it is suitable for a variety of applications from automotive to power conditioning of unregulated sources. The LMR14203/LMR14006 Evaluation Board is designed to provide the design engineer with a fully (...)

用户指南: PDF
支持的产品和硬件
有库存
限制：
??asset.out-of-stock-ti_zh_CN??
无货
仿真模型

LMR14203X PSpice Average Model

SNVM220.ZIP (53 KB) - PSpice 模型
支持的产品和硬件
仿真模型

LMR14203X PSpice Transient Model

SNVM219.ZIP (180 KB) - PSpice 模型
支持的产品和硬件
仿真模型

LMR14203X Unencrypted PSpice Average Model

SNVM943.ZIP (1 KB) - PSpice 模型
支持的产品和硬件
仿真模型

LMR14203X Unencrypted PSpice Transient Model

SNVM942.ZIP (2 KB) - PSpice 模型
支持的产品和硬件
参考设计

PMP22339 — 适用于服务器电池备用充电的高电压 800W SEPIC 转换器参考设计

此断续导通模式 (DCM) 非隔离式 800W SEPIC 转换器电池充电器参考设计提供可调的输出电压和电流。通过设置 0V 到 3V 之间的外部直流电压，可在 282V 到 400V 之间调整输出电压。通过调整 PWM 输入占空比，可在 0A 到 2A 之间调整输出充电电流。它在 340Vdc 到 420Vdc 的输入电压范围内运行。使用独立的电压和电流反馈环路维持稳定。
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
SOT-23-THN (DDC) 6 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

订购和质量

推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。

支持和培训

可获得 TI 工程师技术支持的 TI E2E™ 论坛

查看全部论坛主题 查看英文版全部论坛主题

所有内容均由 TI 和社区贡献者按“原样”提供，并不构成 TI 规范。请参阅使用条款。

如果您对质量、包装或订购 TI 产品有疑问，请参阅 TI 支持。​​​​​​​​​​​​​​

视频