MCP1501
High-Precision Buffered Voltage Reference
Features
• Maximum Temperature Coefficient: 50 ppm/°C
from –40°C to +125°C
• Initial Accuracy: 0.1%
• Operating Temperature Range: –40 to +125°C
• Low Typical Operating Current: 140
μA
• Line Regulation: 50 ppm/V Maximum
• Load Regulation: 40 ppm/mA Maximum
• 8 Voltage Variants Available:
- 1.024V
- 1.250V
- 1.800V
- 2.048V
- 2.500V
- 3.000V
- 3.300V
- 4.096V
• Output Noise: 27 µVRMS, 10 Hz to 10 kHz
(1.024V)
General Description
The MCP1501 is a buffered voltage reference capable
of sinking and sourcing 20 mA of current. The voltage
reference is a low-drift bandgap-based reference. The
bandgap uses chopper-based amplifiers, effectively
reducing the drift to zero.
The MCP1501 is available in the following packages:
• 6-Lead SOT-23
• 8-Lead SOIC
• 8-Lead 2 mm x 2 mm WDFN
Package Types
MCP1501
6-Lead SOT-23
OUT 1
GND 2
GND 3
6 V
DD
5 GND
4 SHDN
Applications
•
•
•
•
•
Precision Data Acquisition Systems
High-Resolution Data Converters
Medical Equipment Applications
Industrial Controls
Battery-Powered Devices
MCP1501
8-Lead SOIC
V
DD
1
GND
2
SHDN
3
GND
4
8
FEEDBACK
7
OUT
6
GND
5
GND
MCP1501
2x2 WDFN*
V
DD
GND
SHDN
GND
1
2
3
4
EP
9
8
7
6
5
FEEDBACK
OUT
GND
GND
*Includes Exposed Thermal Pad (EP). See
Table 3-1
2015-2017 Microchip Technology Inc.
DS20005474E-page 1
MCP1501
BLOCK DIAGRAM
V
DD
Σ
OUT
FEEDBACK
Shutdown
Circuitry
SHDN
GND
DS20005474E-page 2
2015-2017 Microchip Technology Inc.
MCP1501
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
(†)
V
DD
.............................................................................................................................................................................5.5V
Maximum current into V
DD
pin ............................................................................................................................... 30 mA
Clamp current, I
K
(V
PIN
< 0 or V
PIN
> V
DD
)........................................................................................................... ±20 mA
Maximum output current sunk by OUTPUT pin ......................................................................................................30 mA
Maximum output current sourced by OUTPUT pin .................................................................................................30 mA
(HBM:CDM:MM)................................................................................................................................ (2 kV:±1.5 kV:200V)
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operation listings of this specification is not implied. Exposure above maximum rating conditions for
extended periods may affect device reliability.
TABLE 1-1:
DC CHARACTERISTICS
Sym.
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
POR
—
V
OUT
Min.
1.65
1.65
2.0
2.25
2.70
3.2
3.5
4.3
—
—
1.0230
1.2488
1.7982
2.0460
2.4975
2.9970
3.2967
4.0919
—
—
—
Typ.
—
—
—
—
—
—
—
—
1.45
0.8
1.0240
1.2500
1.800
2.0480
2.500
3.000
3.300
4.0960
10
5
Max.
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
—
—
1.0250
1.2513
1.8018
2.0500
2.5025
3.0030
3.3033
4.1001
50
50
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/C
ppm/V
ppm/mA –5 mA < I
LOAD
< +5 mA
Conditions
MCP1501-10
MCP1501-12
MCP1501-18
MCP1501-20
MCP1501-25
MCP1501-30
MCP1501-33
MCP1501-40
Electrical Characteristics:
Unless otherwise specified, V
DD(MIN)
V
DD
5.5V at –40C
T
A
+125C.
Characteristic
Supply Voltage
Power-on-Reset
Release Voltage
Power-on-Reset
Rearm Voltage
Output Voltage MCP1501-10
MCP1501-12
MCP1501-18
MCP1501-20
MCP1501-25
MCP1501-30
MCP1501-33
MCP1501-40
Temperature
MCP1501-XX
Coefficient
Line
Regulation
Load
Regulation
T
C
V
OUT
/
V
IN
V
OUT
/
I
OUT
Dropout
Voltage
Power Supply
Rejection
Ratio
V
DO
PSRR
—
10 ppm – 40 ppm –
sink
sink
15 ppm – 70 ppm –
source
source
—
200
94 dB
mV
–5 mA < I
LOAD
< +2 mA
1.024V option, V
IN
= 5.5V,
60 Hz at 100 mV
P-P
2015-2017 Microchip Technology Inc.
DS20005474E-page 3
MCP1501
TABLE 1-1:
DC CHARACTERISTICS (CONTINUED)
Sym.
V
IL
V
IH
∆V
OUT_HYST
Min.
Typ.
1.35
3.80
300 µV
Max.
Units
Conditions
V
IN
= 5.5V
Refer to
Section 1.1.10
“Output Voltage
Hysteresis”
for additional
details on testing conditions.
0.1 Hz to 10 Hz, T
A
= +25C
10 Hz to 10 kHz, T
A
= +25C
0.1 Hz to 10 Hz, T
A
= +25C
10 Hz to 10 kHz, T
A
= +25C
T
A
= +25°C
2.048V option
No Load
No Load, T
A
= +25°C
T
A
= +25°C
Electrical Characteristics:
Unless otherwise specified, V
DD(MIN)
V
DD
5.5V at –40C
T
A
+125C.
Characteristic
Shutdown
Output Voltage
Hysteresis
Output Noise
MCP1501-10
MCP1501-40
e
N
e
N
I
LOAD
I
DD
Maximum
Load Current
Supply
Current
Shutdown
Current
MCP1501-10
MCP1501-20
MCP1501-40
—
—
—
—
—
—
—
14
27
20
110
±20
140
—
205
185
185
—
—
—
—
—
550
350
µVRMS
µVRMS
mA
µA
nA
I
SHDN
TABLE 1-2:
TEMPERATURE SPECIFICATIONS
Parameters
Sym.
T
A
T
A
JA
JA
JA
Min.
–40
–65
—
—
—
Typ.
—
—
+190.5
+149.5
+141.3
Max.
+125
+150
—
—
—
Units
°C
°C
°C/W
°C/W
°C/W
Conditions
Electrical Specifications:
Unless otherwise indicated, all parameters apply at AV
DD,
DV
DD
= 2.7 to 3.6V.
Temperature Ranges
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistance
Thermal Resistance for SOT-23-6
Thermal Resistance for SOIC-8
Thermal Resistance for DFN-8
DS20005474E-page 4
2015-2017 Microchip Technology Inc.
MCP1501
1.1
1.1.1
Terminology
OUTPUT VOLTAGE
Output voltage is the reference voltage that is available
on the OUT pin.
EQUATION 1-3:
V OUT
-------------------
100% = % Line Regulation
-
V IN
Line regulation may also be expressed as %/V or in
ppm/V, as shown in
Equation 1-4
and
Equation 1-5,
respectively.
1.1.2
INPUT VOLTAGE
The input voltage (V
IN
) is the range of voltage that can
be applied to the V
DD
pin and still have the device
produce the designated output voltage on the OUT pin.
EQUATION 1-4:
V OUT
-----------------------------------
V OUT
NOM
%
-
----------------------------------------
100% = ---- Line Regulation
-
V IN
V
1.1.3
TEMPERATURE COEFFICIENT
(TC
OUT
)
The output temperature coefficient or voltage drift is a
measure of how much the output voltage will vary from
its initial value with changes in ambient temperature.
The value specified in the electrical specifications is
measured as shown in
Equation 1-1.
EQUATION 1-5:
V OUT
-----------------------------------
V OUT
NOM
6
ppm
-
----------------------------------------
10 = ---------- Line Regulation
-
V IN
V
As an example, if the MCP1501-20 is implemented in a
design and a 2 µV change in output voltage is mea-
sured from a 250 mV change on the input, then the
error in percent, ppm, percent/volt, and ppm/volt, as
shown in
Equation 1-6
–
Equation 1-9.
EQUATION 1-1:
TC
OUTPUT
CALCULATION
V OUT
MAX
–
V OUT
MIN
6
-
TC OUT = --------------------------------------------------------------------------
10 ppm/
C
T
V OUT
NOM
Where:
V
OUT(MAX)
= Maximum output voltage over the
temperature range
V
OUT(MIN)
= Minimum output voltage over the
temperature range
V
OUT(NOM)
= Average output voltage over the
temperature range
T
= Temperature range over which the
data was collected
EQUATION 1-6:
V OUT
2
V
-
-------------------
100%
------------------
100%
= .0008%
250 mV
V IN
EQUATION 1-7:
V OUT
6
6
2
V
-
-------------------
10
------------------
10
= 8 ppm
V IN
250 mV
1.1.4
DROPOUT VOLTAGE
The dropout voltage is defined as the voltage difference
between V
DD
and V
OUT
under load.
Equation 1-2
is
used to calculate the dropout voltage.
EQUATION 1-8:
2
V-
----------------
2.048V
--------------------
100% =
----------------------
100% = 0.000390625 %
-
----
-
V IN
V
250 mV
EQUATION 1-2:
V DO = V IN
–
V OUT | I OUT = Cons tan t
V OUT
1.1.5
LINE REGULATION
EQUATION 1-9:
2
V-
----------------
2.048V
6
ppm
--------------------
10 =
----------------------
10 =
3.90625
-----------
-
-
V IN
V
250 mV
An ideal voltage reference will maintain a constant out-
put voltage regardless of any changes to the input volt-
age. However, when real devices are considered, a
small error may be measured on the output when an
input voltage change occurs.
Line regulation is defined as the change in output volt-
age (
V
OUT
) as a function of a change in input voltage
(
V
IN
), and expressed as a percentage, as shown in
Equation 1-3.
V OUT
6
2015-2017 Microchip Technology Inc.
DS20005474E-page 5
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