MIC803-31D2VC3-TR [MICROCHIP]
IC,VOLT DETECTOR,FIXED,+3.08V,TSSOP,3PIN,PLASTIC;
| 型号： | MIC803-31D2VC3-TR |
| 厂家： | 
MICROCHIP |
| 描述： | IC,VOLT DETECTOR,FIXED,+3.08V,TSSOP,3PIN,PLASTIC 光电二极管 |
| 文件： | 总12页 (文件大小：572K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC803
3-Pin Microprocessor Supervisor Circuit
with Open-Drain Reset Output
General Description
Features
The MIC803 is a single-voltage supervisor with open-drain
reset output that provides accurate power supply
monitoring and reset generation in microprocessor-based
systems. The function of the device is to assert a reset
signal if the power supply voltage drops below the reset
threshold voltage, and retain this reset for the reset
timeout period once the power supply increases above the
reset threshold voltage.
• 4.5μA supply current (typical) at 3.6V
• Open-drain /RESET output
• /RESET remains valid with VCC as low as 1V
• 20ms, 140ms, or 1120ms (minimum) reset timeout
options
• 2.63V to 4.63V preset voltage threshold options
• 2.5% voltage threshold accuracy over temperature
• 3-pin SC70-3 package (2.0mm × 2.1mm)
• 3-pin SOT-23 package (2.3mm × 2.9mm)
• -40˚C to +125˚C junction temperature range
The MIC803 consumes only 4.5µA of supply current and
offers three reset delay periods of 20ms, 140ms, and
1120ms (minimum). It features factory-programmed reset
threshold levels from 2.63V to 4.63V to accommodate
3.0V, 3.3V, and 5.0V power supplies. It is available in the
compact 3-pin SC-70 and SOT-23 packages.
Applications
• Critical microcomputer power monitoring
• Portable equipment
• Solid state drives
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
• Printers/computers
• Embedded controllers
Typical Application
VCC
VCC
VCC
100k
MIC803
µP
RESET
GND
RESET
GND
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
August 3, 2015 Revision 1.2
Micrel, Inc.
MIC803
Ordering Information(1)
Nominal
TH (V)
Minimum
Part Number
Marking(2)
Junction Temperature Range
Package
V
tRESET(3) (ms)
MIC803-46D2VC3
MIC803-44D2VC3
MIC803-41D2VC3
MIC803-40D2VC3
MIC803-31D2VC3
MIC803-30D2VC3
MIC803-29D2VC3
MIC803-26D2VC3
MIC803-46D3VC3
MIC803-44D3VC3
MIC803-41D3VC3
MIC803-40D3VC3
MIC803-31D3VC3
MIC803-30D3VC3
MIC803-29D3VC3
MIC803-26D3VC3
MIC803-46D4VC3
MIC803-44D4VC3
MIC803-41D4VC3
MIC803-40D4VC3
MIC803-31D4VC3
MIC803-30D4VC3
MIC803-29D4VC3
MIC803-26D4VC3
MIC803-46D2VM3
MIC803-44D2VM3
MIC803-41D2VM3
MIC803-40D2VM3
MIC803-31D2VM3
MIC803-30D2VM3
MIC803-29D2VM3
MIC803-26D2VM3
MIC803-46D3VM3
AS
AP
AK
A2
AG
AV
AD
AA
AT
AQ
AM
A5
A4
AX
AE
AB
AU
AR
AN
A6
AJ
4.63
4.38
4.10
4.00
3.08
3.00
2.93
2.63
4.63
4.38
4.10
4.00
3.08
3.00
2.93
2.63
4.63
4.38
4.10
4.00
3.08
3.00
2.93
2.63
4.63
4.38
4.10
4.00
3.08
3.00
2.93
2.63
4.63
20
20
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SC70-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
20
20
20
20
20
20
140
140
140
140
140
140
140
140
1120
1120
1120
1120
1120
1120
1120
1120
20
AZ
A3
AC
AS
AP
AK
A2
AG
AV
AD
AA
AT
20
20
20
20
20
20
20
140
Note:
1. All devices available in tape and reel only. (Order entry PN, add TR. Example: MIC803-26D4VM3 TR)
Standard/full reel quantity is 3,000 pieces.
Reel diameter is 7 inches. Hub diameter is 2 inches. Width is 8mm.
2. Underbar symbol (_) may not be to scale.
3. –40° to +85°C temperature range.
August 3, 2015
Revision 1.2
2
Micrel, Inc.
MIC803
Ordering Information(1) (Continued)
Nominal
Minimum
Part Number
Marking(2)
Junction Temperature Range
Package
VTH (V)
4.38
4.10
4.00
3.08
3.00
2.93
2.63
4.63
4.38
4.10
4.00
3.08
3.00
2.93
2.63
tRESET(3) (ms)
MIC803-44D3VM3
MIC803-41D3VM3
MIC803-40D3VM3
MIC803-31D3VM3
MIC803-30D3VM3
MIC803-29D3VM3
MIC803-26D3VM3
MIC803-46D4VM3
MIC803-44D4VM3
MIC803-41D4VM3
MIC803-40D4VM3
MIC803-31D4VM3
MIC803-30D4VM3
MIC803-29D4VM3
MIC803-26D4VM3
AQ
AM
A5
A4
AX
AE
AB
AU
AR
AN
A6
AJ
140
140
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
140
140
140
140
140
1120
1120
1120
1120
1120
1120
1120
1120
AZ
A3
AC
Part Numbering Convention
August 3, 2015
Revision 1.2
3
Micrel, Inc.
MIC803
Pin Configuration
3-Pin SC70
(Top View)
3-Pin SOT-23
(Top View)
Pin Description
Pin Number
Pin Name Pin Function
1
GND
/RESET
VCC
Ground Pin.
/RESET goes low if VCC falls below the reset threshold (VTH), and remains asserted for one timeout
2
3
period after VCC exceeds VTH
.
Power Supply Input and Monitored Voltage.
August 3, 2015
Revision 1.2
4
Micrel, Inc.
MIC803
Absolute Maximum Ratings(4)
Operating Ratings(5)
Supply Voltage (VCC)...................................... –0.3V to 6.0V
Reset Output (/RESET).................................. –0.3V to 6.0V
Input Current (VCC) ......................................................20mA
Output Current (/RESET)............................................20mA
Rate of Rise (VCC) ...................................................100V/µs
Junction Temperature (TJ)…………………………....+150°C
Lead Temperature (soldering, 10s)............................ 260°C
Storage Temperature (TS).........................–65°C to +150°C
ESD Rating(6)..................................................................3kV
Supply Voltage (VCC)........................................ 1.0V to 5.5V
Reset Output Voltage (/RESET) ...................... 0.0V to 5.5V
Junction Temperature (TJ) ........................–40°C to +125°C
Junction Thermal Resistance
3-Pin SC70 (θJA) ..............................................260°C/W
3-Pin SOT-23 (θJA)...........................................203°C/W
Electrical Characteristics(7)
For typical values, VCC = 5.0V for MIC803-46/44/41/40, VCC = 3.3V for MIC803-31/30/29, VCC = 3.0V for MIC803-26; TJ = 25°C,
Bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.
Parameter
Conditions
Min.
Typ.
Max.
Units
Power Supply Input
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
1.0
1.2
5.5
5.5
15
10
18
13
Operating Voltage Range (VCC
)
V
VCC = 5.5V, No Load
VCC = 3.6V, No Load
VCC = 5.5V, No Load
VCC = 3.6V, No Load
5.5
4.5
TJ = –40˚C to +85˚C
TJ = +85˚C to +125˚C
Supply Current (ICC
)
µA
Voltage Threshold
Reset Threshold (VTH
Notes:
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
TJ = –40˚C to +85˚C
TJ = -40˚C to +125˚C
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
4.50
4.44
4.25
4.20
4.00
3.97
3.89
3.80
3.00
2.95
4.63
4.38
4.10
4.00
3.08
4.75
4.82
4.50
4.56
4.20
4.24
4.10
4.20
3.15
3.21
MIC803-46
MIC803-44
MIC803-41
MIC803-40
MIC803-31
)
V
4. Exceeding the absolute maximum ratings may damage the device.
5. The device is not guaranteed to function outside its operating ratings.
6. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
7. Specification for packaged product only.
August 3, 2015
Revision 1.2
5
Micrel, Inc.
MIC803
Electrical Characteristics(7) (Continued)
For typical values, VCC = 5.0V for MIC803-46/44/41/40, VCC = 3.3V for MIC803-31/30/29, VCC = 3.0V for MIC803-26; TJ = 25°C,
Bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.
Parameter
Conditions
Min.
Typ.
3.00
2.93
2.63
Max.
Units
Voltage Threshold (Continued)
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
2.93
2.90
2.82
2.81
2.55
2.50
3.08
3.11
3.00
3.05
2.70
2.76
MIC803-30
MIC803-29
MIC803-26
Reset Threshold (VTH
)
V
Reset Time
VCC to /RESET Delay (tD)
Reset Timeout Period (tRESET
Reset Output
VCC = VTH to (VTH – 100mV)
TJ = –40˚C to +85˚C
15
35
µs
20
16
44
48
D2
D3
D4
TJ = –40˚C to +125˚C
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
TJ = –40˚C to +85˚C
TJ = –40˚C to +125˚C
140
112
1120
900
230
360
420
2400
3200
)
ms
1800
0.4
0.3
0.3
1
V
V
VCC ≥ 4.0V, ISINK = 3.2mA
VCC > 2.5V, ISINK = 1.2mA
VCC ≥ 1.0V, ISINK = 50µA
/RESET Output Voltage (VOL
/RESET Output Leakage
)
V
VCC > VTH, /RESET Deasserted
μA
August 3, 2015
Revision 1.2
6
Micrel, Inc.
MIC803
Typical Characteristics
Reset Timeout Period (D3)
vs. Temperature
VCC to /RESET Delay
vs. Temperature
VCC Operating Supply Current
vs. Temperature
7
30
25
20
15
10
5
300
280
260
240
220
200
VCC = 5.5V
VCC = 3.6V
VCC = VTH to VTH-100mV
6
5
4
3
0
-50
-20
10
40
70
100
130
-50
-20
10
40
70
100
130
-50
-20
10
40
70
100
130
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
Normalized Reset Threshold
vs. Temperature
VCC Operating Supply Current
vs. Supply Voltage
Maximum Transient Duration
vs Overdrive
8
6
4
2
0
1.004
1.000
0.996
0.992
0.988
50
VTH = 2.93V
VTH = 2.93V
40
30
20
10
0
-50
-20
10
40
70
100
130
0
1
2
3
4
5
6
0
200
400
600
800
1000
TEMPERATURE (°C)
OVERDRIVE VOLTAGE, VTH - VCC (mV)
SUPPLY VOLTAGE (V)
August 3, 2015
Revision 1.2
7
Micrel, Inc.
MIC803
Timing Diagram
VTH
VCC
0V
RESET
VOL
tRESET
tD
tRESET
Functional Diagram
MIC803
RESET (2)
VCC (3)
RESET
GENERATOR
+
-
VTH
GND (1)
August 3, 2015
Revision 1.2
8
Micrel, Inc.
MIC803
Application Information
Microprocessor Reset
/RESET Valid at Low Voltage
The /RESET pin is asserted whenever VCC falls below the
reset threshold voltage, VTH. The /RESET pin remains
asserted for the duration of the reset timeout period
(tRESET) after VCC has risen above the reset threshold
voltage. The reset function ensures the microprocessor is
properly reset and powers up in a known condition after a
power failure. /RESET will remain valid with VCC as low
as 1.0V.
As VCC drops to 0V, the MIC803 will no longer be able to
pull the /RESET output low, and the pull-up resistor will
pull the output high. The value of the pull-up resistor and
the voltage it is connected to will affect the point at which
this happens.
The /RESET output is a simple open-drain N-channel
MOSFET structure. A pull-up resistor must be used to
pull this output up to some voltage. For most applications,
this voltage will be the same power supply that supplies
VCC to the MIC803. As shown in Figure 1, it is possible,
however, to tie this resistor to some other voltage. This
will allow the MIC803 to monitor one voltage while level-
shifting the /RESET output to some other voltage. The
pull-up voltage must be limited to 5.5V. The resistor must
be small enough to supply current to the inputs and
leakage paths that are driven by the /RESET output.
+3.3V
+5V
Figure 2. /RESET at Falling VCC
Wire ORing the /RESET Output
VCC
VCC
Since the /RESET output is open-drain, several reset
sources can be wire-ORed, in parallel, to allow resets
from multiple sources.
100k
µP
MIC803
VCC Transients
The MIC803 is relatively immune to negative-going VCC
glitches below the reset threshold (see Typical
Characteristics, graph titled “Maximum Transient
Duration vs. Overdrive”). As shown in Figure 3, the
overdrive voltage is the difference between the threshold
voltage and the minimum point of the VCC glitch.
Typically, an overdrive of 100mV, with duration of 15μs or
less will not cause a reset. If additional transient immunity
is needed, a 0.1μF bypass capacitor can be placed as
close as possible to the MIC803 on the VCC pin.
RESET
RESET
GND
GND
Figure 1. MIC803 Used in a Multiple Supply System
Figure 3. VCC Threshold
August 3, 2015
Revision 1.2
9
Micrel, Inc.
MIC803
Package Information and Recommended Landing Pattern(8)
3-Pin SC70 (MM)
Note:
8. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
August 3, 2015
Revision 1.2
10
Micrel, Inc.
MIC803
Package Information and Recommended Landing Pattern(8)
3-Pin SOT-23 (MM)
August 3, 2015
Revision 1.2
11
Micrel, Inc.
MIC803
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN, and timing & communications
markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock
management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company customers
include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products.
Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and
advanced technology design centers situated throughout the Americas, Europe, and Asia. Additionally, the Company maintains an extensive network
of distributors and reps worldwide.
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical
implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2010 Micrel, Incorporated.
August 3, 2015
Revision 1.2
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