Transcript
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS SLVS228 – AUGUST 1999
D D D D D D
TPS3809 . . . DBV PACKAGE (TOP VIEW)
3-Pin SOT-23 Package Supply Current of 9 µA (Typical) Precision Supply Voltage Monitor 2.5 V, 3 V, 3.3 V, 5 V Power-On Reset Generator With Fixed Delay Time of 200 ms Pin-For-Pin Compatible With MAX 809 Temperature Range . . . –40°C to 85°C
GND
1 3
RESET
VDD
2
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
D
3.3 V 5V
IN
OUT GND
VDD VDD
TMS320LC54x
TPS3809K33 RESET
RESET GND
GND
D D D D D D D
Applications Using DSPs, Microcontrollers, or Microprocessors Wireless Communication Systems Portable/Battery-Powered Equipment Programmable Controls Intelligent Instruments Industrial Equipment Notebook/Desktop Computers Automotive 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.
Copyright 1999, Texas Instruments Incorporated
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.
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TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS SLVS228 – AUGUST 1999
AVAILABLE OPTIONS TA
–40°C 40°C to 85°C
DEVICE NAME TPS3809J25DBVR† TPS3809J25DBVT‡ † TPS3809L30DBVR TPS3809L30DBVT‡ TPS3809K33DBVR† TPS3809I50DBVR†
THRESHOLD VOLTAGE
MARKING
2.25 V
PCZI
2.64 V
PDAI
TPS3809K33DBVT‡ TPS3809I50DBVT‡
2.93 V
PDBI
4.55 V
PDCI
† The DBVR passive indicates tape and reel of 3000 parts. ‡ The DBVT passive indicates tape and reel of 250 parts. ORDERING INFORMATION
FUNCTION/TRUTH TABLE, TPS3809 VDD>VIT
TPS380
RESET
0
L
1
H
9
J
25 DBV R Reel Package Nominal Supply Voltage Nominal Threshold Voltage
Functionality Family
functional block diagram TPS3809
R1
_
VDD
+
Reset Logic + Timer
R2 GND Oscillator Reference Voltage of 1.137 V
2
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RESET
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
ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ
td
ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ
td
t
For VDD< 1.1 V Undefined Behavior of RESET Output
absolute maximum ratings over operating free-air temperature (unless otherwise noted)† 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 † Stresses beyond those listed under “absolute maximum ratings” 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 “recommended operating conditions” 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 POWER RATING
DERATING FACTOR ABOVE TA = 25°C
TA = 70°C POWER RATING
TA = 85°C POWER RATING
DBV
437 mW
3.5 mW/°C
280 mW
227 mW
recommended operating conditions at specified temperature range MIN Supply voltage, VDD Operating free-air temperature range, TA
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MAX
UNIT
2
6
V
–40
85
°C
3
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS SLVS228 – AUGUST 1999
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VOH
VOL
VIT IT–
TEST CONDITIONS VDD = 2.5 V to 6 V, IOH = –500 µA VDD = 3.3 V, IOH = –2 mA VDD = 6 V, IOH = –4 mA
High-level output voltage
Low-level output voltage
VDD = 2 V to 6 V, VDD = 3.3 V,
Power-up reset voltage (see Note 2)
VDD = 6 V, VDD ≥ 1.1 V,
Negative-going g g g input threshold voltage (see Note 3)
MIN
Hysteresis
IDD
Supply current
Ci
Input capacitance
MAX
V
IOL = 500 µA
0.2
IOL = 2 mA IOL = 4 mA IOL = 50 µA
0.4 0.2
TPS3809J25
2.20
2.25
2.30
2.58
2.64
2.70
2.87
2.93
2.99
4.45
4.55
4.65
TA– 40°C to 85°C
V
0.4
TPS3809L30 TPS3809K33
UNIT
VDD –0.4
TPS3809I50
Vh hys
TYP
VDD –0.2 VDD –0.4
TPS3809J25
30
TPS3809L30
35
TPS3809K33
40
TPS3809I50
60 VDD = 2 V, Output unconnected VDD = 6 V, Output unconnected
V
V
mV
9
12
20
25
µA
VI = 0 V to VDD 5 pF NOTES: 2. The lowest supply voltage at which RESET becomes active. tr, VDD ≥ 15 µs/V. 3. To ensure best stability of the threshold voltage, a bypass capacitor ( 0.1 µF ceramic) should be placed near the supply terminals.
timing requirements at RL = 1 MΩ, CL = 50 pF, TA = 25°C PARAMETER tw
Pulse width
TEST CONDITIONS at VDD
VDD = VIT– + 0.2 V,
MIN
VDD = VIT– – 0.2 V
TYP
MAX
UNIT µs
3
switching characteristics at RL = 1 MΩ, CL = 50 pF, TA = 25°C PARAMETER td
Delay time
tPHL
Propagation (delay) time, high-to-low-level output
4
VDD to RESET delay
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TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDD ≥ VIT– + 0.2 V, See timing diagram
120
200
280
ms
VIL = VIT– – 0.2 V, VIH = VIT– +0.2 V
• DALLAS, TEXAS 75265
1
µs
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS SLVS228 – AUGUST 1999
TYPICAL CHARACTERISTICS SUPPLY CURRENT vs SUPPLY VOLTAGE
LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 2.75
50 TA = 25°C
2.50
40
2.25
30
2.00 TA = 25°C 1.75 1.50 TA = 85°C
1.25
TA = 0°C
1.00 0.75
TA =–40°C
0.50
I DD – Supply Current – µ A
VOL – Low-Level Output Voltage – V
VDD = 2.5 V
20 10
TPS3809J25
0 –10 –20 –30 –40
0.25 0
–50 0
2.5
5.0
7.5
10.0
12.5
–2
IOL – Low-Level Output Current – mA
Figure 1
HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT
6.5
5.5 5.0 TA =–40°C
4.0 3.5
TA = 0°C
3.0 2.5
TA = 85°C
2.0 1.5 1.0
VDD = 2.5 V
2.75
TA = 25°C
VOH – High-Level Output Voltage – V
VOH – High-Level Output Voltage – V
3.00
VDD = 6 V
4.5
6
Figure 2
HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 6.0
0 2 4 VDD – Supply Voltage – V
2.50 2.25 2.00 TA =–40°C
1.75 1.50
TA = 0°C
1.25 1.00
TA = 85°C
0.75 0.50
TA = 25°C
0.25
0.5 0
0 0
–10 –20 –30 –40 IOH – High-Level Output Current – mA
–50
0
Figure 3
–2 –4 –6 –8 IOH – High-Level Output Current – mA
–10
Figure 4
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TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS SLVS228 – AUGUST 1999
TYPICAL CHARACTERISTICS MINIMUM PULSE DURATION AT VDD vs VDD THRESHOLD OVERDRIVE VOLTAGE
1.001
3.5 VDD = 2.3 V
t w – Minimum Pulse Duration at V DD – µs
Normalized Threshold Voltage V IT (T A ), V IT (25 ° C)
NORMALIZED INPUT THRESHOLD VOLTAGE vs FREE-AIR TEMPERATURE AT VDD
1.000
0.999
0.998
0.997
0.996
0.995 –40
3.0 2.5 2.0 1.5 1.0 0.5 0
–20
0 20 40 60 TA – Free-Air Temperature – °C
85
0
0.2
Figure 6
Figure 5
6
0.4
POST OFFICE BOX 655303
0.6
0.8
VDD – Threshold Overdrive Voltage – V
• DALLAS, TEXAS 75265
1.0
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS SLVS228 – AUGUST 1999
MECHANICAL DATA DBV (R-PDSO-G3)
PLASTIC SMALL-OUTLINE
0,95 0,50 0,30
0,20 M
3
1,70 1,50
0,15 NOM
3,00 2,60
2
1
Gage Plane
3,00 2,80 0,25 0°–8°
0,55 0,35
Seating Plane 1,45 0,95
0,05 MIN
0,10
4073253-2/E 05/99 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion.
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Copyright 1999, Texas Instruments Incorporated
