TPS3813-Q1

更新时间： 2024-11-10 11:06:31

品牌	Logo	应用领域
德州仪器 - TI		监控电源管理电路电源电路
页数	文件大小	规格书
16页	301K
描述
具有可编程窗口看门狗的汽车电压监控器（复位 IC）

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TPS3813-Q1 数据手册

TPS3813J25-Q1, TPS3813L30-Q1

TPS3813K33-Q1, TPS3813I50-Q1

www.ti.com

SPRS288B –MAY 2008–REVISED APRIL 2012

PROCESSOR SUPERVISORY CIRCUITS WITH WINDOW-WATCHDOG

Check for Samples: TPS3813J25-Q1, TPS3813L30-Q1, TPS3813K33-Q1, TPS3813I50-Q1

During power on, RESET is asserted when supply

FEATURES

voltage (V_DD) becomes higher than 1.1 V. Thereafter,

the supervisory circuit monitors V_DDand keeps

RESET active as long as V_DDremains below the

threshold voltage (V_IT). An internal timer delays the

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

ensure proper system reset. The delay time, t_d= 25

ms typical, starts after V_DDhas risen above the

threshold voltage (V_IT). When the supply voltage

drops below the threshold voltage (V_IT), the output

becomes active (low) again. No external components

are required. All the devices of this family have a

fixed-sense threshold voltage (V_IT) set by an internal

voltage divider.

•

Qualified for Automotive Applications

Window-Watchdog With Programmable Delay

and Window Ratio

•

6-Pin SOT-23 Package

Supply Current of 9 μA (Typ)

Power On Reset Generator With a Fixed Delay

Time of 25 ms

•

Precision Supply Voltage Monitor:

2.5 V, 3 V, 3.3 V, 5 V

•

Open-Drain Reset Output

Temperature Range –40°C to 125°C

For safety-critical applications, the TPS3813 family

incorporates a window-watchdog with programmable

delay and window ratio. The upper limit of the

watchdog time-out can be set by either connecting

WDT to GND or V_DD, or by using an external

capacitor. The lower limit, and thus the window ratio,

is set by connecting WDR to GND or V_DD. The

supervised processor now needs to trigger the

TPS3813 within this window not to assert a RESET.

APPLICATIONS

•

Applications Using DSPs, Microcontrollers, or

Microprocessors

•

Safety-Critical Systems

Automotive Systems

Heating Systems

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 6-pin SOT-23 package.

DESCRIPTION

The TPS3813 supervisory circuits provide circuit

initialization and timing supervision, primarily for

DSPs and processor-based systems.

The TPS3813 devices are characterized for operation

over a temperature range of –40°C to 125°C.

V_DD

DBV PACKAGE

SOT-23

(TOP VIEW)

0.1mF

WDI

GND

WDT

RESET

WDR

V_DD

RESET

WDR

TPS3813

WDT

RESET

I/O

WDI

GND

C_WP

Typical Operating Circuit

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.

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...16

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与TPS3813-Q1相关器件

型号	品牌	获取价格	描述	数据表
TPS3818	TI	获取价格	Low Quiescent Current, Accurate Programmable-Delay Supervisory Circuit
TPS3818G01	TI	获取价格	Low Quiescent Current, Accurate Programmable-Delay Supervisory Circuit
TPS3818G09	TI	获取价格	Low Quiescent Current, Accurate Programmable-Delay Supervisory Circuit
TPS3818G09DRVR	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6, 2 X 2 MM, PLASTIC, SON-6
TPS3818G09DRVT	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6, 2 X 2 MM, PLASTIC, SON-6
TPS3818G12	TI	获取价格	Low Quiescent Current, Accurate Programmable-Delay Supervisory Circuit
TPS3818G125	TI	获取价格	Low Quiescent Current, Accurate Programmable-Delay Supervisory Circuit
TPS3818G125DRVT	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6, 2 X 2 MM, PLASTIC, SON-6
TPS3818G12DRVR	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6, 2 X 2 MM, PLASTIC, SON-6
TPS3818G12DRVT	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6, 2 X 2 MM, PLASTIC, SON-6

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