TPS3808G50

更新时间： 2024-11-06 22:24:39

品牌	Logo	应用领域
德州仪器 - TI		监控
页数	文件大小	规格书
15页	412K
描述
Low Quiescent Current, Programmable-Delay Supervisory Circuit

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TPS3808G50 数据手册

TPS3808

www.ti.com

SBVS050E–MAY 2004–REVISED OCTOBER 2005

Low Quiescent Current, Programmable-Delay

Supervisory Circuit

FEATURES

DESCRIPTION

•

Power-On Reset Generator with Adjustable

Delay Time: 1.25ms to 10s

The

TPS3808xxx

family

microprocessor

supervisory circuits monitor system voltages from

0.4V to 5.0V, 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

user adjustable delay time after the SENSE voltage

and manual reset (MR) return above their thresholds.

•

Very Low Quiescent Current: 2.4µA typ

High Threshold Accuracy: 0.5% typ

Fixed Threshold Voltages for Standard

Voltage Rails from 0.9V to 5V and Adjustable

Voltage Down to 0.4V Are Available

•

Manual Reset (MR) Input

Open-Drain RESET Output

The TPS3808 uses a precision reference to achieve

0.5% threshold accuracy for V_IT≤ 3.3V. The reset

delay time can be set to 20ms by disconnecting the

C_Tpin, 300ms by connecting the C_Tpin to V_DDusing

a resistor, or can be user-adjusted between 1.25ms

and 10s by connecting the C_Tpin to an external

capacitor. The TPS3808 has a very low typical

quiescent current of 2.4µA so it is well-suited to

battery-powered applications. It is available in a small

Temperature Range: –40°C to +125°C

Small SOT23 and 2mm × 2mm QFN Packages

APPLICATIONS

•

DSP or Microcontroller Applications

Notebook/Desktop Computers

PDAs/Hand-Held Products

Portable/Battery-Powered Products

FPGA/ASIC Applications

SOT23 and an ultra-small 2mm

× 2mm QFN

PowerPAD™ package and is fully specified over a

temperature range of –40°C to +125°C (T_J).

DBV PACKAGE

SOT23

1.2V

3.3V

(TOP VIEW)

RESET

GND

V_DD

SENSE

C_T

CORE

SENSE

SENSE V

I/O

TPS3808G12

TPS3808G33

DSP

RESET

GPIO

GND

C_T

GND

DRV PACKAGE

2mm x 2mm QFN

(TOP VIEW)

V_DD

RESET

Power

PAD

Typical Application Circuit

SENSE

C_T

GND

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...15

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TPS3808G50DBVR	TI	获取价格	Low Quiescent Current, Programmable-Delay Supervisory Circuit
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