LP3470A438DBVR集成电路（IC）的监控器规格书PDF中文资料

LP3470A438DBVR属于集成电路（IC）的监控器。由德州仪器制造生产的LP3470A438DBVR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

1• Pin-to-pin compatible with LP3470

• 5-Pin SOT-23 package

• Open-drain RESET output

• Programmable reset time-out period using an

external capacitor

• Immune to short VCC transients

• ±1% Reset threshold accuracy (typical)

• Ultra-low quiescent current (0.3 μA typical)

• RESET valid down to VCC = 0.95 V

2 Applications

• Critical μP and μC power monitoring

• Intelligent instruments

• Computers

• Portable and battery-powered equipment

• Building automation: building security system,

video surveillance

• Factory automation: field transmitters, position

and proximity sensors

• Motor drives

3 Description

The LP3470A device is a micropower voltage

supervisory circuit designed to monitor voltages

within 1% of reset threshold overtemperature and is

pin-to-pin compatible with existing TI device LP3470.

The LP3470A device provides accurate, nano-power

voltage monitoring with programmable delay.

The LP3470A asserts a reset signal whenever the

VCC supply voltage falls below a reset threshold. The

reset time-out period is adjustable using an external

capacitor. Reset remains asserted for an interval

(programmed by an external capacitor) after VCC has

risen above the threshold voltage plus hysteresis.

For information on available reset threshold voltage

options, see Mechanical, Packaging, and Orderable

Information.