Texas Instruments TPS3809L30DBVT, TPS3809L30DBVR, TPS3809L303DBVT, TPS3809K33DBVR, TPS3809K33DBVT Datasheet

TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS

						SLVS228 ± AUGUST 1999
D 3-Pin SOT-23 Package	TPS3809 . . . DBV PACKAGE
D Supply Current of 9 A (Typical)			(TOP VIEW)
D Precision Supply Voltage Monitor	GND			1
2.5 V, 3 V, 3.3 V, 5 V				3		VDD
D Power-On Reset Generator With Fixed
Delay Time of 200 ms				2
	RESET
D Pin-For-Pin Compatible With MAX 809
D Temperature Range . . . ±40°C to 85°C

description

The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs and processor-based systems.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the

supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset.

The delay time, td(typ) = 200 ms, starts after VDD has risen above the threshold voltage VIT. When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again. No external components

are required. All the devices of this family have a fixed sense-threshold voltage VIT set by an internal voltage divider.

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 3-pin SOT-23. The TPS3809 devices are characterized for operation over a temperature range of ±40°C to 85°C.

typical applications

		TPS76333
		3.3 V
5 V	IN	OUT
		GND	VDD
		VDD	TMS320LC54x
		TPS3809K33
		RESET	RESET
		GND	GND

DApplications Using DSPs, Microcontrollers, or Microprocessors

DWireless Communication Systems

DPortable/Battery-Powered Equipment

DProgrammable Controls

DIntelligent Instruments

DIndustrial Equipment

DNotebook/Desktop Computers

DAutomotive Systems

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.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright 1999, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

1

TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS

SLVS228 ± AUGUST 1999

AVAILABLE OPTIONS

	TA	DEVICE NAME		THRESHOLD VOLTAGE	MARKING
		TPS3809J25DBVR²	TPS3809J25DBVT³	2.25 V	PCZI
	±40°C to 85°C	TPS3809L30DBVR²	TPS3809L30DBVT³	2.64 V	PDAI
		TPS3809K33DBVR²	TPS3809K33DBVT³	2.93 V	PDBI
		TPS3809I50DBVR²	TPS3809I50DBVT³	4.55 V	PDCI

² The DBVR passive indicates tape and reel of 3000 parts. ³ The DBVT passive indicates tape and reel of 250 parts.

FUNCTION/TRUTH TABLE, TPS3809

ORDERING INFORMATION

TPS380 9 J 25 DBV R

VDD>VIT

RESET

0

L

Reel

1

H

Package

Nominal Supply Voltage

Nominal Threshold Voltage

Functionality

Family

functional block diagram

	TPS3809
		Reset	RESET
R1		Logic
	_
VDD		+
	+	Timer
	R2
GND
		Oscillator
	Reference
	Voltage
	of 1.137 V

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS

SLVS228 ± AUGUST 1999

timing diagram

VDD

V(NOM)

VIT

1.1 V
	t
RESET
1
0	t
td	td

For VDD< 1.1 V Undefined

Behavior of RESET Output

absolute maximum ratings over operating free-air temperature (unless otherwise noted)²

Supply voltage, VDD (see Note1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V All other pins (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3 V to 7 V

Maximum low output current, IOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 mA Maximum high output current, IOH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5 mA Input clamp current, IIK (VI<0 or VI>VDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO<0 or VO>VDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table

Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±40°C to 85°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±65°C to 150°C Soldering temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C

²Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not

implied. Exposure to absolute±maximum±rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to GND. For reliable operation the device should not be operated at 7 V for more than t=1000h continuously.

DISSIPATION RATING TABLE

	PACKAGE	TA <25°C	DERATING FACTOR	TA = 70°C	TA = 85°C
		POWER RATING	ABOVE TA = 25°C	POWER RATING	POWER RATING
	DBV	437 mW	3.5 mW/°C	280 mW	227 mW

recommended operating conditions at specified temperature range

	MIN	MAX	UNIT
Supply voltage, VDD	2	6	V
Operating free-air temperature range, TA	±40	85	°C

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

3