LP3809 datasheet(1/6 Pages) POWER

Part #	LP3809

Description	Micro-Power Voltage Detectors, Reset Of MCU With Delay Time

PDF	6 Pages

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Manufacturer	POWER [Lowpower Semiconductor inc]

Direct Link	http://www.lowpowersemi.com

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LP3809

LP3809-datasheet

Oct.-2004

1-1

Micro-Power Voltage Detectors,

Reset Of MCU With Delay Time

General Description

The LP3809 is a micro-power voltage

detector supervising the power supply

voltage level for microprocessors (µP) or

digital systems. It provides internally fixed

threshold levels with 0.1V per step ranging

from 1.2V to 5V, which covers most digital

applications. It features low supply current of

3µA. The LP3809 performs supervisory

function by sending out a reset signal

whenever the VDD voltage falls below a

preset threshold level. This reset signal will

last the whole period before VDD recovering.

Once

VDD

recovered

upcrossing

the

threshold level, the reset signal will be

released after a certain delay time. Available

in the 5-lead of SOT-23 packages.

Pin Configurations

SOT-23

Pin No.

1

2

3

Type A

RESET

GND

VDD

Type B

GND

RESET

VDD

Typical Application Circuit

Features

Built-in Recovery Delay Include 210ms

Internally Fixed Threshold 1.2V to 5V in

0.1V Step

No External Components Required

High Accuracy

1.5%

Low Supply Current 3 A

Low Functional Supply Voltage 0.9V

N-Channel Open-Drain output

Quick Start-Up

Applications

Computers

CPU/MCU/DSP

Portable

Battery-Powered Equipment

Ordering Information

LP3809□ - □ □ □ □ □

F:PB-Free

Package

B3: SOT-23

Output Voltage:

Type

12: 1.2V

A: Type A

13: 1.3V

B: Type B

50: 5.5V

Note:

1. Output Voltage range from 1.2V to 5.0V in

0.1V increments.

2. 2.7V output order is LP3809A-27B3F.

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