TPS3808G01DBVR监控电路 TI原装德州仪器

1 Features

1• Power-On Reset Generator with Adjustable Delay

Time: 1.25 ms to 10 s

• Very Low Quiescent Current: 2.4 μA Typical

• High Threshold Accuracy: 0.5% Typ

• Fixed Threshold Voltages for Standard Voltage

Rails from 0.9 V to 5 V and Adjustable Voltage

Down to 0.4 V Are Available

• Manual Reset (MR) Input

• Open-Drain RESET Output

• Temperature Range: –40°C to 125°C

• Small SOT-23 and 2-mm × 2-mm WSON

Packages

2 Applications

• DSP or Microcontroller Applications

• Notebook and Desktop Computers

• PDAs and Hand-Held Products

• Portable and Battery-Powered Products

• FPGA and ASIC Applications

3 Description

The TPS3808 family of microprocessor supervisory

circuits monitors system voltages from 0.4 V to 5 V,

asserting an open-drain RESET signal when the

SENSE voltage drops below a preset threshold or

when the manual reset (MR) pin drops to a logic low.

The RESET output remains low for the useradjustable

delay time after the SENSE voltage and

manual reset (MR) return above the respective

thresholds.

The TPS3808 device uses a precision reference to

achieve 0.5% threshold accuracy for VIT ≤ 3.3 V. The

reset delay time can be set to 20 ms by

disconnecting the CT pin, 300 ms by connecting the

CT pin to VDD using a resistor, or can be useradjusted

between 1.25 ms and 10 s by connecting

the CT pin to an external capacitor. The TPS3808

device has a very low typical quiescent current of

2.4 μA, so it is well-suited to battery-powered

applications. It is available in the SOT-23 and 2-mm ×

2-mm WSON packages,
TPS3808G01DBVRTPS3808G01DBVRTPS3808G01DBVRTPS3808G01DBVR

1功能

1 .延时可调的开机复位发电机

时间:1.25毫秒到10秒

•非常低静态电流:2.4μA典型

•高阈值准确率:0.5% Typ

•标准电压的固定阈值电压

轨道从0.9 V到5v，电压可调

只有0.4 V可用

•手动复位(MR)输入

•开启排水复位输出

•温度范围:-40°C到125°C

•小SOT-23和2毫米×2毫米WSON

包

2应用程序

•DSP或单片机应用

•笔记本和台式电脑

•pda和手持产品

•便携式电池供电产品

•FPGA和ASIC应用

3描述

TPS3808系列微处理器监控

电路监控系统电压从0.4 V到5v，

当

感觉电压下降到预设的阈值或以下

当手动复位(MR) pin下降到逻辑低。

对于可调用户，重置输出仍然很低

延迟时间后的感觉电压和

手动复位(MR)返回各自上面

阈值。

TPS3808设备使用精度参考

实现0.5%的阈值准确性维特≤3.3 V。的

复位延迟时间可设置为20毫秒

通过连接CT引脚，断开CT引脚300ms

CT pin到VDD使用一个电阻，或可以用户调整

通过连接在1.25毫秒到10秒之间

连接外部电容器的CT引脚。的TPS3808

设备具有非常低的典型静止电流

2.4μA,适合电池供电

应用程序。它有SOT-23和2毫米×

2毫米WSON包装