WMSIC Electronic Components

(20 Pcs) 78D05G-AA3-R AMS1117-1.2 AMS1117-1.5 AMS1117-1.8 AMS1117-1.8V AMS1117-2.5 AMS1117-2.5V AMS1117-3.3 SOT-223

Model78D05G-AA3-R
PackageSOT-223
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
8 options
Configuration AMS1117-2.5 · CNY · AMS1117-2.5 · BM0231096300 · 20 · 3791698 · 0.158

Available for RFQ

Technical data

Product details

20 specifications

Core information

Product name
GR AMS1117-3.3
Type
SOT-223
Unit
Pcs
Minimum package
20 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
1.2V@(1A)
Electronic Component
GR
Electronic Component
0.003%Vout
Electronic Component
AMS1117-3.3
Electronic Component
1
Package
SOT-223
Electronic Component
Linear Regulator(LDO)
Electronic Component
0.13g
Electronic Component
1
Electronic Component
BM0263546179
Operating Temperature
0℃~+150℃@(Tj)
Operating Voltage
15V
Output
Electronic Component
Output Voltage
3.3V
Output Current
1A

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

AMS1117-3.3 产品概述

一、产品简介

AMS1117-3.3(GR 国睿品牌)是一款固定输出为3.3V的正电压低压降三端线性稳压器,单路输出、最大输出电流可达1A。器件内部集成过热关断与过流保护,适用于各类便携与固定电源系统,为单片机、传感器、无线模块等提供稳固的3.3V电源。

二、主要规格与性能特点

  • 输出电压(固定):3.3V
  • 最大输出电流:1A
  • 工作电压(最大输入):15V
  • 压差(Dropout):1.2V @ 1A(设计时需留足输入裕量)
  • 静态电流(Iq):约5mA
  • 电源纹波抑制比(PSRR):75dB @ 120Hz(对交流纹波抑制能力强)
  • 输出噪声:0.003% Vout(低噪声特性)
  • 保护功能:热关断、过流限制
  • 工作结温(Tj):0℃ ~ +150℃
  • 输出极性:正极;输出类型:固定;通道数:1

三、封装与热管理

本器件采用SOT-223封装,占板面积小但热阻相对较高。工作在高负载或高差分电压时,器件会产生较大功耗(Pd = (Vin - Vout) × Iout),需通过合理的PCB铜箔散热、加大焊盘或外加散热片来降低结温,确保热关断不被误触发并提升长期可靠性。

四、典型应用与电路建议

  • 典型输入电容:建议在输入侧并联10µF及0.1µF陶瓷去耦,抑制高频干扰;输出侧需配合低ESR电容(如10µF固态/钽电容与0.1µF陶瓷并联),保证稳定性与瞬态响应。
  • 输入电压选择:为满足压差要求及负载稳定性,推荐输入电压至少为Vout + 1.5V,在1A负载下优先考虑更高裕量。
  • 布局要点:输入到稳压器的走线短且粗,地线独立或星形接地,输出走线避免长距离并做好旁路。

五、选型与使用注意

  • 若系统对效率有较高要求或Vin远高于3.3V且输出功率大,建议评估开关型转换器以降低热耗。
  • 对于低静态电流或更宽温度范围需求场景,比较同类线性稳压器的Iq与热特性后选型。
  • 出货信息与封装图请参见GR(国睿)提供的数据手册,以获取电气特性曲线和焊接工艺指南。

AMS1117-3.3以其结构简单、外部元件少、噪声与纹波抑制良好而广泛应用于嵌入式和消费电子电源设计中。

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