WMSIC Electronic Components

Silergy SQ20953AIC

ModelSQ20953AIC
PackageTSOT-23-8
BrandSILERGY
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
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
silergy SQ20953AIC
Type
SILERGY
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
SILERGY
Electronic Component
SQ20953AIC
Electronic Component
1
Package
TSOT-23-8
Electronic Component
DC-DC Power Supply IC
Electronic Component
1g
Electronic Component
1
Type
Electronic Component
Synchronous
Electronic Component
Electronic Component
BM0264555822
Operating Temperature
40℃~+125℃@(TJ)
Operating Voltage
4.5V~30V
Switching Frequency
500kHz~2.5MHz
Electronic Component
Electronic Component
Output Current
3A

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

SQ20953AIC 产品概述

一、产品简介

SQ20953AIC 是矽力杰(silergy)推出的一款高效同步降压型 DC/DC 转换器,采用降压拓扑并集成低 RDS(ON) 的主开关与同步整流管,能够在宽输入电压范围内稳定输出并提供最高 3A 的负载电流。器件采用峰值电流控制架构,开关频率可通过外部电阻在 500kHz 至 2.5MHz 之间调节,适合对尺寸、效率和电磁兼容有综合要求的应用场景。

二、主要规格

  • 功能类型:降压型(可调输出)
  • 输入电压:4.5V ~ 30V
  • 输出电流:最高 3A
  • 开关频率:500kHz ~ 2.5MHz(外部电阻设定)
  • 工作温度:-40℃ ~ +125℃(TJ)
  • 同步整流:内置
  • 静态电流:典型 10µA(超低待机功耗)
  • 开关管:内置低 RDS(ON) 主/同步管
  • 封装:TSOT-23-8

三、关键特性与优势

  • 轻载高效模式:在轻载或待机状态下自动切换高效工作模式,配合 10µA 级静态电流,显著降低系统静态功耗。
  • 峰值电流控制:控制环路响应快,简化补偿设计,抗负载瞬态能力强。
  • 逐波限流与打嗝限流:具备逐波限流保护并在持续过载时进入打嗝(hiccup)限流,既保护器件又减少过热风险。
  • 可调开关频率:通过外部电阻灵活调整频率与效率/滤波器尺寸之间的折中,利于小型化电源设计。
  • 内置软启动:上电软启动限制浪涌电流,减小对输入电源的冲击并避免输出过冲。
  • 小尺寸封装:TSOT-23-8 封装适合空间受限的应用,便于降板级尺寸和 BOM 优化。

四、典型应用

  • 汽车辅助电源(车载电子、传感器供电)
  • 工业控制与仪表供电
  • 通信设备、接口模块电源
  • 电池供电设备与便携终端的主/次级电源

五、设计要点与建议

  • 输入需配置低 ESR 的陶瓷旁路电容以抑制开关噪声和电压尖峰,必要时增加 RC 吸收或 TVS 保护。
  • 根据输出电流选择合适电感和输出电容;高频工作时优先选用低损耗电感以降低发热。
  • 开关频率设置时在效率、滤波元件体积与 EMI 要求间权衡,500kHz 可获得较高效率与较小滤波器尺寸,接近 2.5MHz 有利于进一步缩小外设尺寸但效率略降。
  • 布局注意开关回路最短最粗,输入地与功率地分离并在器件附近短接,确保稳定与低噪声。

SQ20953AIC 以其宽输入、电流能力与低待机功耗的组合,适用于对效率、体积和可靠性有较高要求的电源解决方案。

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