WMSIC Electronic Components

SEMTECH SC189CULTRT

ModelSC189CULTRT
PackageMLPD-6-UT(2x2)
BrandSEMTECH
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 22+

Available for RFQ

Technical data

Product details

18 specifications

Core information

Product name
SEMTECH SC189CULTRT
Type
SEMTECH
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
SEMTECH
Electronic Component
SC189CULTRT
Electronic Component
1
Package
MLPD-6-UT(2x2)
Electronic Component
DC-DC Power Supply IC
Electronic Component
0g
Electronic Component
1
Type
Electronic Component
Electronic Component
BM0264866328
Operating Voltage
2.9V~5.5V
Output Voltage
1.2V
Output Current
1.5A
Electronic Component
Electronic Component
Electronic Component
3000

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

SC189CULTRT 产品概述

一、概述

SC189CULTRT 是 SEMTECH 面向中低压点载(point-of-load)应用的降压型 DC-DC 开关稳压器,输入电压范围 2.9V 至 5.5V,固定输出 1.2V,最大输出电流 1.5A。器件为同步整流、内置开关管的降压拓扑,工作开关频率高达 2.5MHz,工作结温范围 -40℃ 至 +125℃(@TJ),封装为 MLPD-6-UT(2×2),适合空间受限与高密度布局的电源设计。

二、主要规格

  • 功能类型:降压型(同步整流)
  • 输入电压:2.9V ~ 5.5V
  • 输出电压:固定 1.2V
  • 输出电流:最高 1.5A
  • 开关频率:2.5MHz(典型)
  • 同步整流:有(内置 MOSFET)
  • 保护功能:过流保护
  • 工作温度:-40℃ ~ +125℃ (@TJ)
  • 封装:MLPD-6-UT(2×2)

三、功能与特性

SC189CULTRT 采用高频开关设计,能在较小的外部被动元件下实现紧凑体积的稳压方案。内置高效同步开关减少整流损耗,提高轻载至重载的效率表现。器件含过流保护机制,提升系统可靠性;固定输出简化上电与反馈网络设计,适合为 SoC、FPGA 前端或存储器供电。

四、典型应用场景

  • 移动与便携式设备的主/次电源
  • 物联网节点、智能传感器模组
  • 通信设备与无线基站的点载稳压
  • 工业控制与嵌入式系统的电源管理

五、外部元件建议(参考)

  • 电感:为匹配 2.5MHz 高频应选择 0.8µH ~ 2.2µH 的低直流电阻功率电感;饱和电流需高于 1.5A。
  • 输入电容:建议 4.7µF ~ 22µF X5R/X7R 陶瓷,靠近 VIN 引脚放置以抑制开关噪声。
  • 输出电容:建议 10µF ~ 47µF 低 ESR 陶瓷以保证负载瞬态响应与稳定性。
    (具体元件值应根据负载动态与效率-纹波权衡在评估板上验证。)

六、PCB 布局与散热要点

  • VIN 与 GND 的去耦电容应尽量靠近芯片输入端脚位,缩短回流环路。
  • 开关节点(SW)走线最短、最窄以减少辐射和损耗;电感与输出电容靠近 SW 与 VOUT。
  • 将热源(芯片)与大面积铜箔相连以利导热,必要时在底层开大散热焊盘并通过过孔连接多层铜层散热。
  • 严格分离模拟地与功率地,靠近器件处以单点汇流方式接地。

七、选型注意事项

  • 若系统需可调输出或更大输出流量,应选择可调版或更高电流等级的器件。
  • 高输入电压瞬态或较大热耗场景下需评估器件结温并适当增加散热面积。
  • 对纹波和 EMI 有严格要求时,请遵循参考设计并增加滤波/屏蔽措施。

总结:SC189CULTRT 以其 2.5MHz 的高开关频率、1.5A 输出能力与紧凑 MLPD-6-UT 封装,为空间受限且需高密度电源布局的消费与工业电子产品提供了可靠且高效的降压解决方案。

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