WMSIC Electronic Components

LOWPOWER LP3993-33X3F

ModelLP3993-33X3F
PackageSOT-89-3
BrandLOWPOWER
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 Date code within 2 years

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
LOWPOWER LP3993-33X3F
Type
LOWPOWER
Minimum package
1000 未知

Technical parameters

Electronic Component
Electronic Component
Electronic Component
300mV@(100mA)
Electronic Component
LOWPOWER
Electronic Component
LP3993-33X3F
Electronic Component
1
Package
SOT-89-3
Electronic Component
Linear Regulator(LDO)
Electronic Component
0.164g
Electronic Component
1
Electronic Component
BM0229946416
Operating Temperature
40℃~+85℃@(Tj)
Operating Voltage
24V
Output
Electronic Component
Output Voltage
3.3V
Output Current
200mA
Output Type
Electronic Component

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

LP3993-33X3F 产品概述

LP3993-33X3F 是微源半导体(LOWPOWER)推出的一款低功耗、固定输出线性稳压器,采用 SOT-89-3 小封装,面向对尺寸、静态电流和可靠性有较高要求的电源设计场景。器件输出为正极固定 3.3V,最大输出电流 200mA,集成过流保护与热关断功能,适合便携式与低功耗系统中为数字芯片或传感器提供稳压电源。

一 主要特点

  • 固定输出:3.3V(正极输出)
  • 最大输出电流:200mA
  • 压差(Dropout):典型 300mV @ 100mA(高负载时压差会有所增加)
  • 工作电压范围:可承受最高 24V 输入(设计时注意功耗)
  • 静态电流 Iq:典型 5μA,极低静态消耗,适合电池供电应用
  • 保护功能:过流保护(OCP)、热关断(TSD)
  • 工作温度范围:-40℃ ~ +85℃(Tj)
  • 封装:SOT-89-3(单通道输出)

二 电气与热管理要点

  • 功耗计算:线性稳压器功耗约等于 (Vin - Vout) × Iout。若 Vin = 24V、Vout = 3.3V、Iout = 200mA,则器件耗散约 4.14W,SOT-89 封装难以在无外加散热条件下承受此功耗,需采用降压转换器或前端限流/分压方案以降低器件热应力。
  • 压差注意:规格给出 100mA 时 300mV,满载 200mA 时压差会增加,须保证输入电压在任何工况下维持高于 Vout + Vdropout。
  • 低静态电流优势:5μA 的待机电流非常适合电池寿命敏感的应用,但在高负载下热耗仍为主要限制因素。

三 典型应用

  • 物联网节点、无线传感器(MCU、射频前端低功耗供电)
  • 便携仪器、手持设备的辅助电源或逻辑电源
  • 工业控制与传感模块的局部稳压(前提保持输入-输出压差受控)
  • 电池供电系统的低功耗模式下维持参考电压

四 封装与布局建议

  • 封装:SOT-89-3,体积小但散热能力有限,建议在 PCB 上设计铜箔散热区域并尽可能缩短引线。
  • 输入/输出电容:建议在芯片引脚附近放置低 ESR 的陶瓷电容(例如 1μF~10μF),输入端用于抑制输入尖峰,输出端保证稳定性与瞬态响应(具体值以器件数据手册为准)。
  • 布线:地线尽量短而宽,若与大电流回路相邻需做隔离,避免热源直吹器件。

五 选型与使用注意

  • 若系统工作电压接近 24V 且负载接近 200mA,优先考虑开关降压转换器或前级限流,以防 SOT-89 过热。
  • 设计时检查器件在不同负载与环境温度下的功耗、热关断触发点与恢复行为。
  • 器件引脚排列与典型应用电路请以厂家元件手册为准,实际布板与验证以样片测试结果为依据。

总体而言,LP3993-33X3F 以其超低静态电流、集成功能与 3.3V 固定输出,适合对待机功耗敏感且输入与输出压差可控的低功耗应用场景。在高输入压差或大电流需求下,应重视热设计或选用更适合的降压方案。

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