WMSIC Electronic Components

RICHTEK RT9078-18GQZ RT9078

ModelRT9078-18GQZ
PackageZQFN-4(1x1)
BrandRICHTEK
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 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
RICHTEK RT9078-18GQZ
Type
RICHTEK
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
300mV@(300mA)
Electronic Component
RICHTEK
Electronic Component
48uVrms
Electronic Component
RT9078-18GQZ
Electronic Component
1
Package
ZQFN-4(1x1)
Electronic Component
Linear Regulator(LDO)
Electronic Component
0.055g
Electronic Component
1
Electronic Component
BM0258853713
Operating Temperature
40℃~+85℃@(Ta)
Operating Voltage
5.5V
Output
Electronic Component
Output Voltage
1.8V
Output Current
300mA

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

RT9078-18GQZ 产品概述

一、简介

RT9078-18GQZ 是 RICHTEK(立锜)推出的一款低压差、低噪声固定输出线性稳压器(LDO),输入电压最高支持至 5.5V,输出为固定 1.8V,最大输出电流 300mA。器件集成过热保护与过流保护,并带有使能(EN)功能,适用于对噪声、PSRR 和静态功耗有较高要求的便携与消费类电子产品。

二、主要电气特性

  • 输出电压:1.8V(固定)
  • 最大输出电流:300mA
  • 最大输入电压:5.5V
  • 压差(Dropout):典型 300mV @ 300mA
  • 静态电流(Iq):2µA,适合电池供电系统的待机节能
  • 噪声:48µVrms(典型值)
  • PSRR:75dB @ 1kHz(优秀的电源纹波抑制)
  • 保护与控制:过热保护、过流保护、带使能端
  • 输出极性:正极,单通道输出

三、封装与热性能

RT9078-18GQZ 采用 ZQFN-4(1×1mm)超小封装,适合对 PCB 面积要求严格的应用。由于封装体积小,芯片的热阻相对较高,设计时需注意功耗计算与 PCB 散热处理:建议在器件底部焊盘与周围铺设散热铜箔并设计合适的过孔,以提高热传导能力,避免长时间大电流工作导致温升触发保护。

四、应用场景

该 LDO 非常适合用于:

  • 可穿戴设备、蓝牙耳机、手持终端等空间与功耗受限的便携产品
  • MCU、传感器、射频前端与 ADC/DAC 的局部电源,需低噪声与高 PSRR 的场合
  • 相机模组、无线通信模块及电池管理系统的参考/供电轨

五、设计注意要点

  • 器件稳定性依赖外部输入/输出去耦电容,设计时须参考厂商应用说明选择合适电容类型与等效串联电阻(ESR)。
  • 当接近最大输出电流时,要关注输入电压留有足够压差(至少等于或大于压差值)以保证在不同负载和温度下稳定输出。
  • 利用使能端进行系统电源 sequencing 或待机控制,可显著降低系统静态功耗。
  • 对热/过流保护工作频率和响应特性有特殊要求的系统,建议在样片评估阶段进行实际功耗与热仿真验证。

总结:RT9078-18GQZ 在超小封装下提供了 1.8V/300mA 的可靠输出、极低静态电流与优异的噪声/PSRR 性能,是空间受限且对电源品质有较高要求的便携式应用的理想选择。请参阅厂家规格书以获取详细的外围电容选型、管脚功能与典型应用电路。

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