TPS3618-50中文资料适用于 RAM 保持模式的 5V 电池备份监控器数据手册TI规格书

描述 Description

The TPS3617 and TPS3618 are battery-backup supervisors that monitor 5 V supplies. They provide a battery-backup function ideal for applications that require data retention of CMOS RAM during fault conditions. When the voltage at VDD drops below a preset threshold (VIT), the active low push-pull RESET output asserts, and VOUT switches from VDD to VBAT. When VDD rises above the trip threshold, VOUT switches immediately from VBAT to VDD. The RESET output remains low until the delay time (td) expires. During power on, RESET is asserted when the supply voltage (VDD or VBAT) goes higher than 1.1 V.The PFI and PFO pins are provided if additional voltage monitoring is needed. If the voltage at PFI is less than 1.15 V, the push-pull PFO pin will assert low. When the voltage at PFI exceeds the threshold voltage, PFO will go high. These devices also feature a watchdog timer pin (WDI) that monitors processor activity and asserts RESET if the the processor is inactive longer than the watchdog timeout period. If the watchdog timer is not used, the WDI pin should be left floating. The TPS3617 and TPS3618 are available in an 8-pin MSOP package and are characterized for operation over a temperature range of -40°C to +85°C.

特性 Features

• Supply Current of 40 µA (Max)
• Battery Supply Current of 100 nA (Max)
• Precision 5-V Supply Voltage Monitor, Other Voltage Options on Request
• Backup-Battery Voltage Can Exceed VDD
• Watchdog Timer With 800-ms Time-Out
• Power-On Reset Generator With Fixed 100-ms Reset Delay Time
• Voltage Monitor for Power-Fail or Low-Battery Monitoring
• Battery Freshness Seal (TPS3617 Only)
• 8-Pin MSOP Package
• Temperature Range: -40° to +85°C
• APPLICATIONS
• Fax Machines
• Set-Top Boxes
• Advanced Voice Mail Systems
• Portable Battery Powered Equipment
• Computer Equipment
• Advanced Modems
• Automotive Systems
• Portable Long-Time Monitoring Equipment
• Point-of-Sale Equipment

简介

TPS3618-50属于集成电路（IC）的监控器。由TI制造生产的TPS3618-50监控器PMIC 监控器用于监视和/或控制电路中的电压轨，能够连接微控制器以维持一定的功率限值。监控器类型包括电池备用电路、监控器、多电压监控器、电源监控器、稳压器/监控器、复位计时器、定序器、简单复位/上电复位、智能开/关控制器、系统管理器、电压检测器和看门狗电路。