WMSIC Electronic Components

ADI/LINEAR LT8641EUDC#TRPBF LT8641EUDC

ModelLT8641EUDC#TRPBF
PackageQFN-20(3x4)
BrandADI/LINEAR
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
ADI(Analog Devices) / LINEAR LT8641EUDC#TRPBF
Type
ADI/LINEAR
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
ADI(Analog Devices) / LINEAR
Electronic Component
LT8641EUDC#TRPBF
Electronic Component
1
Package
QFN-20(3x4)
Electronic Component
DC-DC Power Supply IC
Electronic Component
0.056g
Electronic Component
1
Features
Frequency Synchronous;; EMI Optimization; Output Voltage
Type
Electronic Component
Synchronous
Electronic Component
Electronic Component
BM0265069631
Operating Temperature
40℃~+125℃@(TJ)
Operating Voltage
3V~65V
Switching Frequency
200kHz~3MHz
Electronic Component
Electronic Component

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

LT8641EUDC#TRPBF DC-DC降压电源芯片产品概述

LT8641EUDC#TRPBF是亚德诺(ADI)LINEAR系列的高效同步降压转换器,专为宽电压、低功耗、紧凑设计场景打造,具备全场景适配能力,广泛覆盖工业、汽车、便携式等领域需求。

一、核心拓扑与功能定位

该芯片采用降压式(BUCK)拓扑,是直流降压转换的主流方案,核心优势为结构简单、效率稳定。作为同步整流型器件,其内置高低侧MOSFET开关管,无需外部续流二极管,既简化电路设计,又降低BOM成本与PCB空间占用。单通道输出设计确保负载供电稳定,支持单一负载或多负载并联扩展,适配灵活。

二、宽电压覆盖特性

LT8641的电压范围极具竞争力,可兼容绝大多数电源场景:

  • 输入电压:3V~65V,覆盖单节锂电池(3.7V)、多串锂电池组(如4串14.8V)、12V/24V铅酸电池、48V工业总线,甚至60V以上高压系统;
  • 输出电压:800mV~64.35V,通过外部电阻分压可灵活调节,既能满足低功耗MCU(如ARM Cortex-M系列)的0.8V供电,也能输出接近输入上限的64V高压,适配高压传感器、功率器件等特殊负载;
  • 最大输出电流:3.5A,支撑小型电机、无线模块、显示模组等中等功率负载稳定运行。

三、高效同步整流设计

同步整流是提升效率的核心:内置高低侧MOSFET交替导通,替代异步整流的续流二极管,大幅降低续流损耗。实测显示,12V输入转5V/3A输出时效率达92%以上;轻载(12V转5V/100mA)下效率仍保持85%+,显著减少功耗发热,延长电池续航(便携式)或降低散热难度(工业/汽车)。

四、灵活输出与频率控制

  • 输出可调:外接两个分压电阻即可设置电压,公式为Vout=0.8V×(1+R1/R2),调节简单且精度高;
  • 频率可调:支持200kHz~3MHz宽范围调节,适配不同场景:
    • 200kHz低频:降低开关损耗,适合大电流(3.5A)或高压输入,减少发热;
    • 3MHz高频:缩小电感电容尺寸(如1uH以下电感),适配手持设备、高密度PCB;
    • 时钟同步:可外接外部时钟,避免多芯片EMI干扰叠加。

五、低静态电流与宽温适应性

  • 超低静态电流:待机仅2.5uA,远低于同类产品。以2000mAh锂电池为例,待机时间可达约920天,显著延长便携式设备续航;
  • 宽温范围:工作结温-40℃+125℃,满足工业级(-40+85℃)、汽车级(-40~+125℃)需求,稳定工作于冬季户外、夏季车载高温、工业车间等严苛环境。

六、封装与典型应用

采用QFN-20封装(3mm×4mm),超小尺寸适配高密度布局,典型应用包括:

  1. 工业控制:PLC模块、工业传感器、电机驱动电源;
  2. 汽车电子:车载导航、行车记录仪、通信模块电源;
  3. 便携式设备:手持医疗仪器、智能穿戴、物联网终端;
  4. 分布式电源:服务器机架、通信基站局部降压;
  5. 低功耗节点:环境监测传感器、智能电表辅助电源。

综上,LT8641EUDC#TRPBF凭借宽电压、高效同步整流、低静态电流、紧凑封装等特性,成为多领域电源设计的理想选择,尤其适合对效率、空间、宽温要求较高的场景。

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