MIC803-26D4VM3TR [MICROCHIP]
IC,VOLT DETECTOR,FIXED,+2.63V,TO-236,3PIN,PLASTIC;
| 型号： | MIC803-26D4VM3TR |
| 厂家： | 
MICROCHIP |
| 描述： | IC,VOLT DETECTOR,FIXED,+2.63V,TO-236,3PIN,PLASTIC 光电二极管 |
| 文件： | 总10页 (文件大小：252K) |
| 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
• 4.5μA supply current (typical) at 3.6V
• Open-Drain /RESET output
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.
• /RESET remains valid with VCC 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
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.
Applications
• Critical microcomputer power monitoring
• Portable equipment
• Solid state drives
• 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
M9999-122310-A
December 2010
Micrel, Inc.
MIC803
Ordering Information (1)
(2)
Part Number
Marking
Nominal VTH
(V)
Min. tRESET
(ms)
Junction Temperature
Range
Package
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
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
4.38
4.10
4.00
3.08
3.00
2.93
2.63
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
–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
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
AQ
AM
A5
A4
AX
AE
AB
20
20
20
20
20
20
20
140
140
140
140
140
140
140
140
M9999-122310-A
December 2010
2
Micrel, Inc.
MIC803
(2)
Part Number
Marking
Nominal VTH
(V)
Min. tRESET
(ms)
Junction Temperature
Range
Package
MIC803-46D4VM3
MIC803-44D4VM3
MIC803-41D4VM3
MIC803-40D4VM3
MIC803-31D4VM3
MIC803-30D4VM3
MIC803-29D4VM3
MIC803-26D4VM3
Notes:
AU
AR
AN
A6
AJ
4.63
4.38
4.10
4.00
3.08
3.00
2.93
2.63
1120
1120
1120
1120
1120
1120
1120
1120
–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
AZ
A3
AC
1. 1: All devices available in Tape and Reel only.
2. 2: –40° to +85°C Temp. Range
Part Numbering Convention:
Pin Configuration
3-Pin SC70
3-Pin SOT-23
Pin Description
Pin Number
Pin Name
Pin Function
1
GND
Ground Pin
/RESET goes low if VCC falls below the reset threshold (VTH), and remains asserted for
one timeout period after VCC exceeds VTH
2
3
/RESET
VCC
Power Supply Input and monitored voltage
M9999-122310-A
December 2010
3
Micrel, Inc.
MIC803
Absolute Maximum Ratings(1)
Operating Ratings(2)
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/us
Junction Temperature (TJ)…………………………....+150˚C
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (TS)..........................-65°C to +150°C
ESD Rating(3)..................................................................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 SOT23 (θJA)............................................203°C/W
Electrical Characteristics(4)
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
TJ = -40˚C to +85˚C
4.50
4.63
4.75
MIC803-46
MIC803-44
MIC803-41
MIC803-40
MIC803-31
MIC803-30
MIC803-29
MIC803-26
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
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
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
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
4.38
4.10
4.00
3.08
3.00
2.93
2.63
Reset Threshold (VTH
)
V
TJ = -40˚C to +125˚C
2.50
2.76
M9999-122310-A
December 2010
4
Micrel, Inc.
MIC803
Electrical Characteristics (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
Max
Units
Reset Time
VCC to /RESET Delay (tD)
VCC = VTH to (VTH – 100mV)
15
35
μs
D2
D3
D4
TJ = -40˚C to +85˚C
20
16
44
48
TJ = +85˚C to +125˚C
TJ = -40˚C to +85˚C
TJ = +85˚C to +125˚C
TJ = -40˚C to +85˚C
TJ = +85˚C to +125˚C
140
112
1120
900
230
360
420
2400
3200
Reset Timeout Period (tRESET
)
ms
1800
Reset Output
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
VCC > VTH, /RESET deasserted
/RESET Output Voltage (VOL
)
V
/RESET Output Leakage
μA
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.
M9999-122310-A
December 2010
5
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)
M9999-122310-A
December 2010
6
Micrel, Inc.
MIC803
Timing Diagram
Functional Diagram
MIC803
RESET (2)
VCC (3)
RESET
GENERATOR
+
-
VTH
GND (1)
M9999-122310-A
December 2010
7
Micrel, Inc.
MIC803
Application Information
Microprocessor Reset
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.
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.
Figure 2. /RESET at falling VCC
Wire OR’ing The /RESET Output
Since the /RESET output is open-drain, several reset
sources can be wire-ORed, in parallel, to allow resets
from multiple sources.
V
CC Transients
The MIC803 is relatively immune to negative-going VCC
glitches below the Reset Threshold. See the Typical
Characteristic Curve, Maximum Transient Duration vs
Overdrive on page 6 of the datasheet. 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.
Figure 1. MIC803 used in a Multiple Supply System
/RESET Valid at Low Voltage
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.
Figure 3. VCC Transient
M9999-122310-A
December 2010
8
Micrel, Inc.
MIC803
Package Information
3-Pin SC-70 (C3)
M9999-122310-A
December 2010
9
Micrel, Inc.
MIC803
3-Pin SOT-23 (M3)
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 makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. 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.
M9999-122310-A
December 2010
10
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