TPS3306中文资料具有电源故障监视功能和看门狗计时器的双处理器电压监控器数据手册TI规格书

描述 Description

The TPS3306 family is a series of supervisory circuits designed for circuit initialization which require two supply voltages, primarily in DSP and processor-based systems. The product spectrum of the TPS3306-xx is designed for monitoring two independent supply voltages of 3.3 V/1.5 V, 3.3 V/1.8 V, 3.3 V/2 V, 3.3 V/2.5 V, or 3.3 V/5 V. The various supervisory circuits are designed to monitor the nominal supply voltage. During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuits monitor the SENSEn inputs and keep RESET active as long as SENSEn remains below the threshold voltage VIT. An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 100 ms, starts after SENSE1 and SENSE2 inputs have risen above the threshold voltage VIT. When the voltage at SENSE1 or SENSE2 input drops below the threshold voltage VIT, the output becomes active (low) again. The integrated power-fail (PFI) comparator with separate open-drain (PFO) output can be used for low-battery detection, power-fail warning, or for monitoring a power supply other than the main supply. The TPS3306-xx devices integrate a watchdog timer that is periodically triggered by a positive or negative transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, tt(out) = 0.50 s, RESET becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog. The TPS3306-xx devices are available in either 8-pin MSOP or standard 8-pin SO packages, and are characterized for operation over a temperature range of -40°C to +85°C.

特性 Features

• Dual Supervisory Circuits With Power-Fail for DSP and Processor-Based Systems
• Voltage Monitor for Power-Fail or Low-Battery Warning
• Watchdog Timer With 0.8 Second Time-Out
• Power-On Reset Generator With Integrated 100 ms Delay Time
• Open-Drain Reset and Power-Fail Output
• Supply Current of 15 µA (Typ.)
• Supply Voltage Range: 7 V to 6 V
• Defined RESET Output From VDD ≥ 1.1 V
• MSOP-8 and SO-8 Packages
• Temperature Range: -40°C to +85°C
• APPLICATIONS
• Multivoltage DSPs and Processors
• Portable Battery-Powered Equipment
• Embedded Control Systems
• Intelligent Instruments
• Automotive Systems

简介

TPS3306属于集成电路（IC）的监控器。由TI制造生产的TPS3306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。