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 (min). 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.
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 (min) 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 x 2.1mm)
3-pin SOT-23 package (2.3mm x 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
V
CC
100k
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
December 2010
M9999-122310-A
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
MIC803-44D3VM3
MIC803-41D3VM3
MIC803-40D3VM3
MIC803-31D3VM3
MIC803-30D3VM3
MIC803-29D3VM3
MIC803-26D3VM3
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
AQ
AM
A5
A4
AX
AE
AB
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
4.38
4.10
4.00
3.08
3.00
2.93
2.63
Min. t
RESET (2)
(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
140
140
140
140
140
140
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
–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
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
December 2010
2
M9999-122310-A
Micrel, Inc.
Part Number
MIC803-46D4VM3
MIC803-44D4VM3
MIC803-41D4VM3
MIC803-40D4VM3
MIC803-31D4VM3
MIC803-30D4VM3
MIC803-29D4VM3
MIC803-26D4VM3
Notes:
1. 1: All devices available in Tape and Reel only.
2. 2: –40° to +85°C Temp. Range
MIC803
Marking
AU
AR
AN
A6
AJ
AZ
A3
AC
Nominal V
TH
(V)
4.63
4.38
4.10
4.00
3.08
3.00
2.93
2.63
Min. t
RESET
(ms)
1120
1120
1120
1120
1120
1120
1120
1120
(2)
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
Package
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
SOT23-3
Part Numbering Convention:
Pin Configuration
3-Pin SC70
3-Pin SOT-23
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
December 2010
3
M9999-122310-A
Micrel, Inc.
MIC803
Absolute Maximum Ratings
(1)
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/us
Junction Temperature (T
J
)…………………………....+150˚C
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (T
S
)..........................-65°C to +150°C
ESD Rating
(3)
.................................................................. 3kV
Operating Ratings
(2)
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 SOT23 (θ
JA
)............................................203°C/W
Electrical Characteristics
(4)
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
MIC803-44
MIC803-41
MIC803-40
Reset Threshold (V
TH
)
MIC803-31
MIC803-30
MIC803-29
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
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
2.93
2.90
2.82
2.81
2.55
2.50
2.63
2.93
3.00
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
3.08
3.11
3.00
3.05
2.70
2.76
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
MIC803-26
December 2010
4
M9999-122310-A
Micrel, Inc.
MIC803
Electrical Characteristics (Continued)
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
Reset Time
V
CC
to /RESET Delay (t
D
)
V
CC
= V
TH
to (V
TH
– 100mV)
D2
D3
D4
T
J
= -40˚C to +85˚C
T
J
= +85˚C to +125˚C
Reset Timeout Period (t
RESET
)
T
J
= -40˚C to +85˚C
T
J
= +85˚C to +125˚C
T
J
= -40˚C to +85˚C
T
J
= +85˚C to +125˚C
Reset Output
V
CC
≥
4.0V, I
SINK
= 3.2mA
/RESET Output Voltage (V
OL
)
V
CC
>
2.5V, I
SINK
= 1.2mA
V
CC
≥
1.0V, I
SINK
= 50μA
/RESET Output Leakage
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
Conditions
Min
Typ
15
Max
Units
μs
20
16
140
112
1120
900
35
230
1800
44
48
360
420
2400
3200
V
V
V
μA
ms
0.4
0.3
0.3
1
V
CC
> V
TH
, /RESET deasserted
December 2010
5
M9999-122310-A
嵌入式系统
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