TPS3809I50DBVR集成电路（IC）的监控器规格书PDF中文资料

TPS3809I50DBVR属于集成电路（IC）的监控器。由德州仪器制造生产的TPS3809I50DBVR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。

1 Features

• 3-pin SOT-23 package

• Supply current of 9 μA (typical)

• Precision supply voltage monitor

2.5 V, 3 V, 3.3 V, 5 V

• Pin-for-pin compatible with MAX 809

• Temperature range: –40°C to +85°C

2 Applications

• Factory automation

• Wireless speakers

• Motor drives

• Servers

• Appliances

• Electricity meters

• Building automation

3 Description

The TPS3809 family of supervisory circuits provides

circuit initialization and timing supervision, primarily

for DSPs and processor-based systems. The newer

TLV809E device is an alternative with the same pins,

functions and electrical parameters.

During power-on, RESET is asserted when the supply

voltage VDD becomes higher than 1.1 V. Thereafter,

the supervisory circuit monitors VDD and keeps

RESET active as long as VDD remains below the

threshold voltage VIT. An internal timer delays the

return of the output to the inactive state (high) to

ensure proper system reset. The delay time, td(typ) =

200 ms, starts after VDD has risen above the threshold

voltage VIT. When the supply voltage drops below the

threshold voltage VIT, the output becomes active (low)

again. No external components are required. All the

devices of this family have a fixed sense-threshold

voltage VIT set by an internal voltage divider.

The product spectrum is designed for supply voltages

of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available

in a 3-pin SOT-23. The TPS3809 devices are

characterized for operation over a temperature range

of –40°C to 85°C.