loading
Richtek

RT9818 是用于微处理器( MCU )和数字系统供电监控的微功耗电压检测器,拥有在 1.2V~5V 范围内的、以 0.1V 为间距的固定电压检测阈值,可满足绝大多数数字系统的需求。RT9818 的电流消耗仅为 3μA,它通过在电源电压 VDD 低于其电压检测阈值时输出复位信号来完成电压监控功能。在 VDD 低于电压检测阈值期间,复位信号将持续有效,并在 VDD 上升超过电压检测阈值之后持续并延迟预定的时间之后释放。RT9818 可以 SC-82、SC-70-3、SOT-23-3、SOT-23-5和 SOT-89 等封装形式供货。

应用

  • 计算机
  • 控制器
  • 智能仪器
  • 关键 μP 和 μC 的电源监控
  • 便携式、电池供电设备
主要规格
RT9818A RT9818B RT9818C RT9818D RT9818E RT9818F RT9818G
Status Active Active Active Active Active Active Active
Vin (min) (V) 0.9 0.9 0.9 0.9 0.9 0.9 0.9
Vin (max) (V) 6 6 6 6 6 6 6
VTH (min) (V) 1.2 1.2 1.2 1.2 1.2 1.2 1.2
VTH (max) (V) 5 5 5 5 5 5 5
Accuracy (±%) 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Reset Active Type Low(Open Drain) Low Low Low High High High
Reset Time-out Period (typ) (ms) 0 55 220 450 0 55 220
Reset Delay Time (typ) (ms) 0.02 0.02 0.02 0.02 0.02 0.02 0.02
Package Type SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89
关键特性
  • 内部固定的电压检测阈值,范围: 1.2V~5V;间距: 0.1V
  • 电压检测精度: ±1.5%
  • 低电流消耗: 3μA
  • 无外部组件需求
  • 快速复位时间: 20μs
  • 内建延时选项: 0ms、55ms、220ms、450ms
  • 低启动电压: 0.9V
  • N 沟道 MOSFET 开漏输出
  • 小型 SC-82, SC-70-3, SOT-23-3, SOT-23-5, SOT-89 封装
  • 符合 RoHS 规范,完全无铅
Datasheet
TitleLast UpdateDownload
电压检测器2008/10/28
Technical Documents
TitleItem TypeLast UpdateDownload
立锜全系列产品选择指南 [Jan., 2024] Selection Guide2024/01/19
Power Management for Video Doorbell App. Note2021/10/08
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT9818A-27GVSOT-233000 Request Buy from Distributor
RT9818A-28GVSOT-233000 Request Buy from Distributor
RT9818A-30GBSOT-253000 Request Buy from Distributor
RT9818A-30GVSOT-233000 Request Buy from Distributor
RT9818B-35GBSOT-253000 Request Buy from Distributor
RT9818C-18GVSOT-233000 Request Buy from Distributor
RT9818C-25GVSOT-233000 Request Buy from Distributor
RT9818C-27GVSOT-233000 Request Buy from Distributor
RT9818C-29GVSOT-233000 Request Buy from Distributor
RT9818C-29GVLSOT-233000 Request Buy from Distributor
RT9818C-30GVSOT-233000 Request Buy from Distributor
RT9818C-30GVLSOT-233000 Request Buy from Distributor
RT9818C-42GVSOT-233000 Request Buy from Distributor
RT9818C-44GVSOT-233000 Request Buy from Distributor
RT9818D-27GVSOT-233000 Request Buy from Distributor
RT9818G-30GVLSOT-233000 Request Buy from Distributor
RT9818G-33GVLSOT-233000 Request Buy from Distributor
RT9818B-18GVSOT-233000 Request Buy from Distributor
RT9818C-27GU3SC-70-33000 Request Buy from Distributor
TOP