MIC803
3-Pin Microprocessor Supervisor Circuit
with Open-Drain Reset Output
General Description
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.
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.
Datasheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
4.5μA supply current (typical) at 3.6V
Open-drain /RESET output
/RESET remains valid with V
CC
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
Applications
•
•
•
•
•
Critical microcomputer power monitoring
Portable equipment
Solid state drives
Printers/computers
Embedded controllers
Typical Application
V
CC
V
CC
100k
V
CC
MIC803
RESET
GND
RESET
µP
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)
Part Number
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
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.
Marking
AS
AP
AK
A2
AG
AV
AD
AA
AT
AQ
AM
A5
A4
AX
AE
AB
AU
AR
AN
A6
AJ
AZ
A3
AC
AS
AP
AK
A2
AG
AV
AD
AA
AT
(2)
Nominal
V
TH
(V)
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
Minimum
(3)
t
RESET
(ms)
20
20
20
20
20
20
20
20
140
140
140
140
140
140
140
140
1120
1120
1120
1120
1120
1120
1120
1120
20
20
20
20
20
20
20
20
140
Junction Temperature Range
–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
Package
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
August 3, 2015
2
Revision 1.2
Micrel, Inc.
MIC803
Ordering Information
(1)
(Continued)
Part Number
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
Marking
AQ
AM
A5
A4
AX
AE
AB
AU
AR
AN
A6
AJ
AZ
A3
AC
(2)
Nominal
V
TH
(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
Minimum
(3)
t
RESET
(ms)
140
140
140
140
140
140
140
1120
1120
1120
1120
1120
1120
1120
1120
Junction Temperature Range
–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
Package
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
Part Numbering Convention
August 3, 2015
3
Revision 1.2
Micrel, Inc.
MIC803
Pin Configuration
3-Pin SC70
(Top View)
3-Pin SOT-23
(Top View)
Pin Description
Pin Number
1
2
3
Pin Name
GND
/RESET
V
CC
Pin Function
Ground Pin.
/RESET goes low if V
CC
falls below the reset threshold (V
TH
), and remains asserted for one timeout
period after V
CC
exceeds V
TH
.
Power Supply Input and Monitored Voltage.
August 3, 2015
4
Revision 1.2
Micrel, Inc.
MIC803
Absolute Maximum Ratings
(4)
Supply Voltage (V
CC
) ...................................... –0.3V to 6.0V
Reset Output (/RESET).................................. –0.3V to 6.0V
Input Current (V
CC
) ...................................................... 20mA
Output Current (/RESET) ............................................ 20mA
Rate of Rise (V
CC
) ................................................... 100V/µs
Junction Temperature (T
J
)…………………………....+150°C
Lead Temperature (soldering, 10s) ............................ 260°C
Storage Temperature (T
S
) ......................... –65°C to +150°C
(6)
ESD Rating .................................................................. 3kV
Operating Ratings
(5)
Supply Voltage (V
CC
) ........................................ 1.0V to 5.5V
Reset Output Voltage (/RESET) ...................... 0.0V to 5.5V
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
3-Pin SC70 (θ
JA
) .............................................. 260°C/W
3-Pin SOT-23 (θ
JA
) ........................................... 203°C/W
Electrical Characteristics
(7)
For typical values, V
CC
= 5.0V for MIC803-46/44/41/40, V
CC
= 3.3V for MIC803-31/30/29, V
CC
= 3.0V for MIC803-26; T
J
= 25°C,
Bold
values indicate –40°C ≤ T
J
≤ +125°C; unless noted.
Parameter
Power Supply Input
Operating Voltage Range (V
CC
)
T
J
= –40˚C to +85˚C
T
J
= –40˚C to +125˚C
T
J
= –40˚C to +85˚C
Supply Current (I
CC
)
T
J
= +85˚C to +125˚C
Voltage Threshold
MIC803-46
T
J
= –40˚C to +85˚C
T
J
= –40˚C to +125˚C
MIC803-44
T
J
= –40˚C to +85˚C
T
J
= –40˚C to +125˚C
T
J
= –40˚C to +85˚C
T
J
= -40˚C to +125˚C
T
J
= –40˚C to +85˚C
T
J
= –40˚C to +125˚C
T
J
= –40˚C to +85˚C
T
J
= –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
3.08
4.00
4.10
4.38
4.63
4.75
4.82
4.50
4.56
4.20
4.24
4.10
4.20
3.15
3.21
V
V
CC
= 5.5V, No Load
V
CC
= 3.6V, No Load
V
CC
= 5.5V, No Load
V
CC
= 3.6V, No Load
1.0
1.2
5.5
4.5
5.5
5.5
15
10
18
13
µA
V
Conditions
Min.
Typ.
Max.
Units
Reset Threshold (V
TH
)
MIC803-41
MIC803-40
MIC803-31
Notes:
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
5
Revision 1.2
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