TPS3837 [TI]
具有手动复位功能的高电平有效、推挽式、毫微功耗监控器;
| 型号： | TPS3837 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 具有手动复位功能的高电平有效、推挽式、毫微功耗监控器 监控 电源管理电路 电源电路 |
| 文件： | 总11页 (文件大小：175K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
D
D
D
D
Supply Current of 220 nA (Typ)
D
Applications Include
– Applications Using Low-Power DSPs,
Microcontrollers, or Microprocessors
– Portable/Battery-Powered Equipment
– Intelligent Instruments
– Wireless Communication Systems
– Notebook Computers
Precision Supply Voltage Supervision
Range: 1.8 V, 2.5 V, 3.0 V, 3.3 V
Power-On Reset Generator With Selectable
Delay Time of 10 ms or 200 ms
Push/Pull RESET Output (TPS3836),
RESET Output (TPS3837), or
Open-Drain RESET Output (TPS3838)
– Automotive Systems
TPS3836, TPS3838
DBV PACKAGE
(TOP VIEW)
D
D
D
Manual Reset
5-Pin SOT-23 Package
Temperature Range –40°C to 85°C
1
2
3
5
V
DD
CT
description
GND
The TPS3836, TPS3837, TPS3838 families of
4
RESET
MR
supervisory circuits provide circuit initialization
and timing supervision, primarily for DSP and
processor-based systems.
TPS3837
DBV PACKAGE
(TOP VIEW)
During power on, RESET is asserted when the
supply voltage V
Thereafter, the supervisory circuit monitors V
and keeps RESET output active as long as V
remains below the threshold voltage V . An
internal timer delays the return of the output to the
inactive state (high) to ensure proper system
becomes higher than 1.1 V.
DD
1
2
3
5
V
CT
DD
DD
DD
GND
IT
4
RESET
MR
reset. The delay time starts after V
has risen
DD
above the threshold voltage V .
IT
When CT is connected to GND a fixed delay time of typical 10 ms is asserted. When connected to V the delay
DD
time is typically 200 ms.
When the supply voltage drops below the threshold voltage V , the output becomes active (low) again.
IT
All the devices of this family have a fixed-sense threshold voltage V set by an internal voltage divider.
IT
The TPS3836 has an active-low push-pull RESET output. The TPS3837 has active-high push-pull RESET, and
TPS3838 integrates an active-low open-drain RESET output.
TPS3836K33
MSP430
V
CC
V
DD
CT
Xin
Lithium
Battery
3.6 V
RST
RESET
GND
MR
Xout
Quartz
32 kHz
T
V
SS
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.
Copyright 2002, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
description (continued)
The product spectrum is designed for supply voltages of 1.8 V, 2.5 V, 3 V, and 3.3 V. The circuits are available
in a 5-pin SOT-23 package. The TPS3836, TPS3837, TPS3838 families are characterized for operation over
a temperature range of –40°C to 85°C.
PACKAGE INFORMATION
T
DEVICE NAME
THRESHOLD VOLTAGE
1.71 V
SYMBOL
PDNI
PDSI
PHRI
PCAI
PDTI
PDOI
PDRI
PCBI
PDUI
PDQI
PDPI
PCCI
PDVI
A
†
‡
TPS3836E18DBVT
TPS3836E18DBVR
†
‡
TPS3836J25DBVR
TPS3836J25DBVT
2.25 V
†
‡
TPS3836H30DBVR
TPS3836H30DBVT
2.79 V
†
‡
TPS3836L30DBVR
TPS3836K33DBVR
TPS3837E18DBVR
TPS3836L30DBVT
TPS3836K33DBVT
TPS3837E18DBVT
2.64 V
†
†
‡
‡
2.93 V
1.71 V
†
‡
TPS3837J25DBVR
TPS3837L30DBVR
TPS3837K33DBVR
TPS3838E18DBVR
TPS3837J25DBVT
2.25 V
–40°C to 85°C
†
‡
TPS3837L30DBVT
TPS3837K33DBVT
TPS3838E18DBVT
2.64 V
†
†
‡
‡
2.93 V
1.71 V
†
‡
TPS3838J25DBVR
TPS3838L30DBVR
TPS3838K33DBVR
TPS3838J25DBVT
2.25 V
†
‡
TPS3838L30DBVT
2.64 V
†
‡
TPS3838K33DBVT
2.93 V
†
‡
The DBVR passive indicates tape and reel of 3000 parts.
The DBVT passive indicates tape and reel of 250 parts.
ORDERING INFORMATION
TPS383
6
E
18 DBV
R
Reel
Package
Nominal Supply Voltage
Typical Reset Threshold Voltage
Functionality
Family
FUNCTION TABLE TPS3836, TPS3837, TPS3838
§
¶
MR
L
V
DD
> V
RESET
RESET
IT
0
L
L
H
H
H
L
L
1
0
1
H
L
H
H
§
¶
TPS3836 and TPS3838
TPS3837
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
functional block diagram
V
DD
R3
C
T
MR
Reset (TPS3837-Push-Pull)
C1
C2
R1
Reset Logic
and Timer
+
Reset (TPS3836-Push-Pull
TPS3838-Open-Drain)
S1
–
R2
S2
S3
Band-Gap
Reference
C3
Refresh
Timer
GND
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
timing diagram
A
B
C
D
E
F
G
V
DD
V
IT
< 1.1 V
MR
t
t
RESET
t
t
t
t
d
Undefined
Output
Undefined
Output
d
d
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
DD
All other pins (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 7 V
Maximum low output current, I
Maximum high output current, I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 mA
OL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –5 mA
OH
Input clamp current, I (V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10 mA
IK
OK
I
I
DD
Output clamp current, I
(V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10 mA
O O DD
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 85°C
A
Storage temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
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 must not be operated at 7 V for more than t=1000 h
continuously
DISSIPATION RATING TABLE
T
<25°C
DERATING FACTOR
T
= 70°C
T = 85°C
A
POWER RATING
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING
A
DBV
437 mW
3.5 mW/ºC
280 mW
227 mW
recommended operating conditions at specified temperature range
MIN
MAX
UNIT
V
Supply voltage, V
DD
1.6
0
6
Input voltage, V
V
+ 0.3
V
I
DD
High-level input voltage, V
IH
0.7 × V
V
DD
Low-level input voltage, V
0.3 × V
DD
V
IL
Input transition rise and fall rate at MR, ∆t/∆V
Operating free-air temperature range, T
100
85
ns/V
°C
–40
A
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
electrical characteristics over recommended operating conditions (unless otherwise noted)
TYP
PARAMETER
TEST CONDITION
MIN
MAX
UNIT
V
V
V
V
V
V
V
V
V
= 3.3 V,
= 6 V,
I
I
I
I
I
I
I
I
I
= –2 mA
= –3 mA
= –1 mA
= –2 mA
= 1 mA
= 2 mA
= 2 mA
= 3 mA
= 50 µA
DD
DD
DD
DD
DD
DD
DD
DD
DD
OH
OH
OH
OL
OL
OL
OL
OL
OL
RESET
(TPS3836)
0.8 ×
V
High-level output voltage
V
OH
V
DD
= 1.8 V,
= 3.3 V,
= 1.8 V,
= 3.3 V,
= 3.3 V,
= 6 V,
RESET
(TPS3837)
RESET
(TPS3836/8)
V
OL
Low-level output voltage
0.4
0.2
V
V
RESET
(TPS3837)
TPS3836/8
TPS3837
≥ 1.1 V,
Power-up reset voltage
(see Note 2)
0.8 ×
V
DD
≥ 1.1 V,
I
= –50 µA
OH
V
DD
TPS383xE18
TPS383xJ25
TPS383xH30
TPS383xL30
TPS383xK33
1.66
2.18
2.70
2.56
2.84
1.71
2.25
2.79
2.64
2.93
30
1.74
2.29
2.85
2.69
2.99
Negative-going input threshold
voltage (see Note 3)
V
V
T
= –40°C to 85°C
V
IT
A
1.7 V < V < 2.5 V
IT
2.5 V < V < 3.5 V
40
Hysteresis at V
DD
input
mV
IT
hys
3.5 V < V < 5 V
IT
50
MR
(see Note 4)
MR = 0.7 × V
,
V
= 6 V
–40
–25
–60
–100
25
µA
nA
µA
DD
DD
I
IH
High-level input current
CT
CT = V
DD
= 6 V
MR
(see Note 4)
MR = 0 V,
CT = 0 V,
V
= 6 V
= 6 V
–130
–25
–200
–340
DD
I
I
Low-level input current
High-level output current
IL
CT
V
DD
V
OH
V
DD
V
DD
25
25
nA
nA
TPS3838
V
DD
V
DD
V
DD
V
DD
= V + 0.2 V,
IT
= V
DD
OH
> V
> V
< V
,
< 3 V
> 3 V
220
250
10
30
5
400
450
15
IT
nA
,
I
Supply current
IT
IT
DD
µA
kΩ
pF
Internal pullup resistor at MR
Input capacitance at MR, CT
C
V = 0 V to V
I DD
I
NOTES: 2. The lowest voltage at which RESET output becomes active. t ≥ 15 µs/V
V
r, DD
3. To ensure best stability of the threshold voltage, a bypass capacitor (ceramic, 0.1 µF) should be placed near the supply terminal.
4. If manual reset is unused, MR should be connected to V to minimize current consumption.
DD
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
timing requirements at R = 1 MΩ, C = 50 pF, T = 25_C
L
L
A
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
at V
V
= V + 0.2 V,
IT
V
V
= V – 0.2 V
6
µs
DD
IH
IL
IT
t
w
Pulse width
V
V
≥ V + 0.2 V,
IT
= 0.3 × V
DD
IH
IL
DD,
at MR
1
µs
= 0.7 × V
DD
switching characteristics at R = 1 MΩ, C = 50 pF, T = 25_C
L
L
A
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
≥ V + 0.2 V,
IT
DD
MR = 0.7 × V
CT = GND,
,
DD
5
10
15
See timing diagram
t
d
Delay time
ms
V
≥ V + 0.2 V,
DD
IT
MR = 0.7 × V
CT = V
DD
,
DD
100
200
300
,
See timing diagram
V
V
= V – 0.2 V,
IT
IL
IH
10
50
10
50
0.1
V
to RESET delay
DD
= V + 0.2 V
IT
t
t
Propagation(delay)time, high-to-low-leveloutput
Propagation(delay)time, low-to-high-leveloutput
µs
µs
PHL
(TPS3836, TPS3838)
V
IL
= 1.6 V
V
V
= V – 0.2 V,
IT
IL
IH
V
DD
to RESET delay
= V + 0.2 V
IT
PLH
(TPS3837)
V
IL
= 1.6 V
MR to RESET delay
(TPS3836, TPS3838)
V
V
V
≥ V + 0.2 V,
IT
DD
t
t
Propagation(delay)time, high-to-low-leveloutput
Propagation(delay)time, low-to-high-leveloutput
µs
µs
PHL
= 0.3 × V
,
IL
IL
DD
DD
MR to RESET delay
(TPS3837)
= 0.7 × V
0.1
PLH
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
I
I
Supply current
vs Supply voltage
1
2
3
4
5
6
DD
Manual reset current
vs Manual reset voltage
vs Low-level output current
vs High-level output current
vs Free-air temperature
MR
V
V
Low-level output voltage
High-level output voltage
Normalized reset threshold voltage
OL
OH
Minimum pulse duration at V
DD
vs V
Threshold overdrive
DD
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
TYPICAL CHARACTERISTICS
SUPPLY CURRENT
vs
MANUAL RESET CURRENT
vs
SUPPLY VOLTAGE
MANUAL RESET VOLTAGE
10
8
100
0
V
= 6 V
MR = Open
CT = GND
DD
CT = GND
T
= 85°C
= 25°C
A
T
A
= –40°C
–100
–200
–300
–400
–500
T
= 0°C
T
A
A
6
T
= 0°C
A
T
A
= 25°C
4
T
A
= 85°C
T
A
= –40°C
2
0
0
2
4
6
–2
0
2
4
6
V
DD
– Supply Voltage – V
V
MR
– Manual Reset Voltage – V
Figure 1
Figure 2
LOW-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
HIGH-LEVEL OUTPUT CURRENT
2.0
1.5
1.0
0.5
0.0
2.0
V
= 2 V
DD
V
= 2 V
DD
MR = OPEN
CT = GND
MR = OPEN
CT = GND
1.5
1.0
0.5
0.0
T
= 85°C
= 25°C
A
T
= 25°C
A
T
A
T
A
= 0°C
T
= 85°C
A
T
= 0°C
A
T
= –40°C
A
T
A
= –40°C
0
1
2
3
4
5
6
7
0
1
2
3
4
5
I
– Low-Level Output Current – mA
I
– High-Level Output Current – mA
OL
OH
Figure 3
Figure 4
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
TYPICAL CHARACTERISTICS
NORMALIZED RESET THRESHOLD
VOLTAGE
vs
FREE-AIR TEMPERATURE
1.001
1
0.999
0.998
0.997
CT = GND,
MR = Open
0.996
0.995
–40
–15
10
35
60
85
T
A
– Free-Air Temperature – °C
Figure 5
MINIMUM PULSE DURATION AT V
vs
DD
V
THRESHOLD OVERDRIVE
DD
22
20
18
16
14
12
10
8
MR = Open
CT = GND
T
= 25°C
A
6
4
2
0
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
V
DD
– Threshold Overdrive – V
Figure 6
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
MECHANICAL DATA
DBV (R-PDSO-G5)
PLASTIC SMALL-OUTLINE
0,50
M
0,20
0,95
0,30
5
4
0,15 NOM
1,70
1,50
3,00
2,60
1
3
Gage Plane
3,00
2,80
0,25
0°–8°
0,55
0,35
Seating Plane
0,10
1,45
0,95
0,05 MIN
4073253-4/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.
D. Falls within JEDEC MO-178
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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deems necessary to support this warranty. Except where mandated by government requirements, testing of all
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Post Office Box 655303
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Copyright 2002, Texas Instruments Incorporated
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