MIC2940A/41A
1.25A Low Dropout Voltage Regulator
Features
General Description
•
•
•
•
•
•
•
•
The MIC2940A and MIC2941A are “bulletproof”
efficient voltage regulators with very low dropout
voltage (typically 40 mV at light loads and 350 mV at
1A), and low quiescent current (240 μA typical). The
quiescent current of the MIC2940A increases only
slightly in dropout, thus prolonging battery life. Key
MIC2940A features include protection against
reversed battery, fold-back current-limiting, and
automotive “load dump” protection (60V positive
transient).
High Output Voltage Accuracy
Guaranteed 1.25A Output
Low Quiescent Current
Low Dropout Voltage
Extremely Tight Load and Line Regulation
Very Low Temperature Coefficient
Current and Thermal Limiting
Input Can Withstand –20V Reverse Battery and
+60V Positive Transients
• Logic-Controlled Electronic Shutdown
• Output Programmable from 1.24V to 26V
(MIC2941A)
• Available in TO-220-3, TO-263-3, TO-220-5, and
TO-263-5 Packages
Applications
•
•
•
•
•
•
•
•
•
The MIC2940A is available in both fixed voltage (3.3V,
5V, and 12V) and adjustable voltage configurations.
The MIC2940A-xx devices are three pin, fixed-voltage
regulators. A logic-compatible shutdown input is
provided on the adjustable MIC2941A, which enables
the regulator to be switched on and off.
Battery-Powered Equipment
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
PCMCIA VCC and VPP Regulation/Switching
Barcode Scanners
Automotive Electronics
SMPS Post-Regulator/DC-to-DC Modules
Voltage Reference
High Efficiency Linear Power Supplies
Package Types
MIC2940A-X.XWT
TO-220-3 (T)
(Top View)
MIC2940A-X.XWU
TO-263-3 (U)
(Top View)
1
1
2
2
3
3
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MIC2941AWU
TO-263-5 (U)
(Top View)
1
2
3
4
MIC2941AWT
TO-220-5 (T)
(Top View)
5
1
2 3
4
5
DS20006000B-page 1
MIC2940A/41A
Typical Application Circuits
MIC2940A-5.0 FIXED +5V
REGULATOR
MIC2941A ADJUSTABLE
REGULATOR
V IN
+VIN
VOUT
VIN
+VIN
VOUT = 5V
V OUT
+
V OUT
S HUTDOWN
INPUT
10μF
1.2V
SHUTDOWN
OFF
GND
AD JU S T
R1 100
pF
26V
22μF
ON
1.23V
GND
R1
V OUT = V R E F x (1 +
)
R2
MIC2941A WIDE INPUT VOLTAGE
RANGE CURRENT-LIMIT
VREF
R2
MIC2941A 5V OR 3.3V SELECTABLE
REGULATOR WITH SHUTDOWN
+V IN
+5V to +7V
V IN
VOUT
+V IN
V OUT = V IN
V CC OUT
VOUT
SHUTDOWN
INPUT
SHUTDOWN
OFF
+
ON
100pF
GND
GND
ADJ
300kΩ
1%
10μF
ADJUST
MINIMUM INPUT-OUTPUT VOLTAGE
RANGES FROM 40MV TO 400MV,
DEPENDING ON LOAD CURRENT
DS20006000B-page 2
5V
3.3V
470 kΩ
220kΩ
1%
180kΩ
1%
2N2222
Adjust Pin Low = Enable Output. Q1 ON = 3.3V, Q1 OFF = 5.0V.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC2940A/41A
Functional Block Diagram
FEEDBACK
IN
Q15A
R18
N
Q15A
Q24
Q26
Q25
OUT
Q9
Q3
R11
18
N
Q6
Q4
Q40
R30
30
N
Q16
R27
R17
N
Q14
R11
20.6
N
V TAP
Q17
R28
Q2
R1
N
R2
N
Q8
Q5
C1
20
pF
Q1
10
Q42
SENSE
Q7
Q20
R10
150
N
R8
N
Q22
Q21
Q23
C2
40 pF
Q13
R15
N
R9
N
R6
140
N
R5
180
N
Q12
Q41
R12
110
N
Q11
R13
100
N
R14
350
N
Q29
Q18
R3
N
R16
N
R17
Q19
Q28
R4
N
5
N
Q30
N
Q31
5N
R22
N
Q36
Q37
SHDN
R24
N
ERROR
Q34
Q38
R26
N
DENOTES CONNECTION ON FIXED
VOLTAGE VERSIONS ONLY
R25
N
Q39
2018 - 2022 Microchip Technology Inc. and its subsidiaries
GND
DS20006000B-page 3
MIC2940A/41A
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Power Dissipation (PD).............................................................................................................. Internally Limited, Note 1
Input Supply Voltage ................................................................................................................................... –20V to +60V
Adjust Input Voltage (Note 2, Note 3)......................................................................................................... –1.5V to +26V
Shutdown Input Voltage ............................................................................................................................. –0.3V to +30V
Error Comparator Output Voltage............................................................................................................... –0.3V to +30V
Operating Ratings ‡
Input Supply Voltage (Note 4) ....................................................................................................................... +2V to +26V
† 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 operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
‡ Notice: The device is not guaranteed to function outside its operating ratings.
Note 1: The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA)/θJA.
Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
2: Circuit of MIC2941A Adjustable Regulator in the Typical Application Circuits section (upper right) with R1 ≥
150 kΩ. VSHUTDOWN ≥ 2V and VIN ≤ 26V, VOUT = 0.
3: When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground.
4: Across the full operating temperature, the minimum input voltage range for full output current is 4.3V to 26V.
Output will remain in regulation at lower output voltages and low current loads down to an input of 2V at
25°C.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics: Limits in standard typeface are for TJ = +25°C and limits in boldface apply over the full
operating temperature range. Unless otherwise specified, VIN = VOUT + 1V, IL = 1000 mA, CL = 10 μF. The MIC2941A
is programmed to output 5V and has VSHUTDOWN 0.6V.
Parameter
Output Voltage Accuracy
Output Voltage Temperature
Coefficient
Symbol
VO
ΔVO/ΔT
Line Regulation
Load Regulation
Dropout Voltage, Note 3
DS20006000B-page 4
ΔVO/VO
VIN – VO
Min.
Typ.
Max.
–1
—
1
–2
—
2
–2.5
—
2.5
—
20
100
—
0.06
0.50
—
0.04
0.16
—
—
0.20
—
60
150
—
—
180
—
200
250
—
—
320
—
350
450
—
—
600
—
400
600
Units
Conditions
—
%
—
5mA ≤ IL ≤ 1A
ppm/°C
%
Note 1
IO = 10 mA,
(VOUT + 1V) ≤ VIN ≤ 26V
IL = 5 mA to 1.25A
IL = 5 mA to 1A, Note 2
IL = 5 mA
mV
IL = 250 mA
IL = 1000 mA
IL = 1250 mA
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC2940A/41A
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Characteristics: Limits in standard typeface are for TJ = +25°C and limits in boldface apply over the full
operating temperature range. Unless otherwise specified, VIN = VOUT + 1V, IL = 1000 mA, CL = 10 μF. The MIC2941A
is programmed to output 5V and has VSHUTDOWN 0.6V.
Parameter
Ground Pin Current, Note 4
Ground Pin Current at
Dropout, Note 4
Current-Limit
Thermal Regulation
Output Noise Voltage
(10 Hz to 100 kHz)
IL = 100 mA
Symbol
Min.
Typ.
Max.
Units
—
240
500
µA
—
3
4.5
—
—
6
—
22
35
—
—
45
—
35
70
IGNDDO
—
330
600
ILIMIT
—
1.6
ΔVO/ΔPD
—
0.05
—
400
—
—
260
—
1.223
1.235
1.247
1.210
—
1.260
1.204
—
1.266
—
20
40
—
—
60
IGND
en
Conditions
IL = 5 mA
IL = 250 mA
mA
IL = 1000 mA
IL = 1250 mA
µA
VIN = 0.5V less than designed VOUT
(VOUT 3.3), IL = 5 mA
3.5
A
VOUT = 0V, Note 5
0.2
%/W
µVRMS
Note 6
CL = 10 µF
CL = 33 µF
Electrical Characteristics for MIC2941A Only
Reference Voltage
VREF
V
Note 7
nA
—
Adjust Pin Bias Current
IBIAS
Reference Voltage
Temperature Coefficient
ΔVREF/ΔT
—
20
—
ppm/°C
—
Adjust Pin Bias Current
Temperature Coefficient
ΔIBIAS/ΔT
—
0.1
—
nA/°C
—
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006000B-page 5
MIC2940A/41A
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Characteristics: Limits in standard typeface are for TJ = +25°C and limits in boldface apply over the full
operating temperature range. Unless otherwise specified, VIN = VOUT + 1V, IL = 1000 mA, CL = 10 μF. The MIC2941A
is programmed to output 5V and has VSHUTDOWN 0.6V.
Parameter
Symbol
Min.
Typ.
Max.
VIL
—
1.3
0.7
Units
Conditions
Shutdown Input
Input Logic Voltage
Shutdown Pin Input Current
Regulator Output Current in
Shutdown
Note 1:
2:
3:
4:
5:
6:
7:
8:
VIH
ISHDN
IOUT(SHDN)
2.0
—
—
—
30
50
—
—
100
—
450
600
—
—
750
—
3
30
—
—
60
V
Low (ON)
High (OFF)
VSHUTDOWN = 2.4V
µA
VSHUTDOWN = 26V
µA
Note 8
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total
temperature range.
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in
output voltage due to heating effects are covered by the thermal regulation specification.
Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV
below its nominal value measured at 1V differential. At low values of programmed output voltage, the minimum input supply voltage of 4.3V over temperature must be taken into account.
Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum
of the load current plus the ground pin current.
The MIC2940A features fold-back current limiting. The short-circuit (VOUT = 0V) current-limit is less than
the maximum current with normal output voltage.
Thermal regulation is defined as the change in output voltage at a time (T) after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 200 mA load pulse at
VIN = 20V (a 4W pulse) for T = 10 ms.
VREF ≤ VOUT ≤ (VIN – 1 V), 4.3V ≤ VIN 26V, 5 mA < IL ≤ 1.25A, TJ ≤ TJ(MAX).
When used in dual supply systems where the regulator load is returned to a negative supply, the output
voltage must be diode clamped to ground.
DS20006000B-page 6
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MIC2940A/41A
TEMPERATURE SPECIFICATIONS (Note 1)
Parameters
Sym.
Min.
Typ.
Max.
Units
Conditions
Storage Temperature Range
TS
–65
—
+150
°C
Junction Operating Temperature Range
TJ
–40
—
+125
°C
—
Lead Temperature
—
—
—
+260
°C
Soldering, 5s
Thermal Resistance TO-220
JC
—
2
—
°C/W
—
Thermal Resistance TO-263
JC
—
2
—
°C/W
—
Temperature Ranges
—
Package Thermal Resistances
Note 1:
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the
maximum allowable power dissipation will cause the device operating junction temperature to exceed the
maximum +125°C rating. Sustained junction temperatures above +125°C can impact the device reliability.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006000B-page 7
MIC2940A/41A
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
40
GROUND CURRENT (mA)
DROPOUT VOLTAGE (mV)
500
400
300
200
100
0
0.00
0.25 0.50 0.75 1.00
OUTPUT CURRENT (A)
FIGURE 2-1:
Current.
1.25
Dropout Voltage vs. Output
10
0.1
11
Ground Current vs. Output
GROUND CURRENT (μA)
400
800
600
400
ILOAD = 1.25A
200
300
200
100
0
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
FIGURE 2-2:
Temperature.
Dropout Voltage vs.
6
FIXED 5V
ILOAD = 5mA
0
FIGURE 2-5:
Voltage.
1
2 3 4 5 6 7
SUPPLY VOLTAGE (V)
8
Ground Current vs. Supply
GROUND CURRENT (mA)
50
OUTPUT VOLTAGE (V)
5
40
4
ILOAD = 5mA
30
3
20
2
ILOAD = 1.25A
10
1
0
0
100
1000 10000
10A
OUTPUT CURRENT (mA)
FIGURE 2-4:
Current.
1000
DROPOUT VOLTAGE (mV)
1
0
1
2
3
4
5
INPUT VOLTAGE (V)
FIGURE 2-3:
DS20006000B-page 8
6
Dropout Characteristics.
0
FIGURE 2-6:
Voltage.
FIXED 3.3V DEVICE
ILOAD = 1.25A
0
2
4
6
8
INPUT VOLTAGE (V)
10
Ground Current vs. Supply
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MIC2940A/41A
3.40
3.38
3.36
0.30
3.34
3.32
3.30
0.20
0.10
ILOAD = 5mA
0.00
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
FIGURE 2-7:
Temperature.
OUTPUT VOLTAGE (V)
GROUND CURRENT (mA)
0.40
Ground Current vs.
3.28
3.26
3.24
3.22
3.20
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
FIGURE 2-10:
vs. Temperature.
1.8
1.6
1.4
1.2
1.4
1.2
1.0
ILOAD = 100mA
VOUT = VNOMINAL – 0.5V
CURRENT (A)
2.0
1.8
1.6
GROUND CURRENT (mA)
2.0
Fixed 3.3V Output Voltage
1.0
0.8
0.6
VOUT = 0V
0.4
0.2
0.4
0.2
FIXED 3.3V
VERSION
3 SAMPLES
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
0.8
0.6
FIGURE 2-8:
Temperature.
Ground Current vs.
FIGURE 2-11:
Short-Circuit and Maximum
Current vs. Temperature.
40
1000
ILOAD = 1.25A
30
20
10
ILOAD = 100mA
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
FIGURE 2-9:
Temperature.
Ground Current vs.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
GROUND CURRENT (μA)
GROUND CURRENT (mA)
50
800
RLOAD = 100
600
400
200
0
-200
-30
FIGURE 2-12:
Voltage.
-20 -10
0
10 20
INPUT VOLTAGE (V)
30
Ground Current vs. Input
DS20006000B-page 9
MIC2940A/41A
50
ADJUST PIN CURRENT (nA)
ENABLE CURRENT (μA)
125
40
100
VE N = 5V
30
75
20
50
VE N = 2V
10
25
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
2.0
-500
1.5
1.0
5mA
0.5
0.0
-0.5
-5
COUT = 10 μF
20
COUT = 10 μF
0
INPUT (V)
10
-40
0
5
TIME (ms)
OUTPUT (mV)
COUT = 100 μF
0
-100
DS20006000B-page 10
4
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
FIGURE 2-17:
200
FIGURE 2-15:
6
10
Load Transient.
2.0
-200
1.5
1.0
5mA
0.5
0.0
-0.5
-5
8
Line Transient.
20
10
COUT = 100 μF
0
-10
10
INPUT (V)
OUTPUT (mV)
OUTPUT (A)
40
-20
FIGURE 2-14:
100
FIGURE 2-16:
MIC2941A Adjust Pin
Current vs. Temperature.
OUTPUT (mV)
OUTPUT (mV)
750
500
250
0
-250
OUTPUT (A)
FIGURE 2-13:
MIC2941A Shutdown
Current vs. Temperature.
ILOAD = 5mA
0
5
TIME (ms)
Load Transient.
10
8
6
4
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
FIGURE 2-18:
Line Transient.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC2940A/41A
1
0.1
FIGURE 2-19:
Frequency.
1x106
100x103
10x103
1x103
1x100
0.01
100x100
ILOAD = 10mA
10x100
OUTPUT IMPEDANCE ( )
10
FREQUENCY (Hz)
Output Impedance vs.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006000B-page 11
MIC2940A/41A
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
MIC2940A
Pin Number
MIC2941A
Pin Number
Pin Name
1
4
Input
2
3
Ground
Ground.
3
5
Output
Regulated output voltage.
—
1
Adjust
Adjust (input): Connect to an external resistor voltage divider to set
the output voltage.
—
2
DS20006000B-page 12
Description
Unregulated input supply.
Shutdown Shutdown/Enable (input): Logic level low = Enable. Logic level high
= Shutdown.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC2940A/41A
4.0
APPLICATION INFORMATION
4.1
External Capacitors
A 10 μF (or greater) capacitor is required between the
MIC2940A output and ground to prevent oscillations
due to instability. Most types of tantalum or aluminum
electrolytics will be adequate; film types will work, but
are costly and therefore not recommended. Many
aluminum electrolytics have electrolytes that freeze at
about –30°C, so solid tantalums are recommended for
operation below –25°C. The important parameters of
the capacitor are an effective series resistance of about
5Ω or less and a resonant frequency above 500 kHz.
The value of this capacitor may be increased without
limit.
At lower values of output current, less output
capacitance is required for output stability. The
capacitor can be reduced to 3.3 μF for current below
100 mA or 2.2 μF for currents below 10 mA. Adjusting
the MIC2941A to voltages below 5V runs the error
amplifier at lower gains so that more output
capacitance is needed. For the worst-case situation of
a 1.25A load at 1.23V output (Output shorted to Adjust)
a 22 μF (or greater) capacitor should be used.
The MIC2940A will remain stable and in regulation with
load currents ranging from 5 mA on up to the full 1.25A
rating. The external resistors of the MIC2941A version
may be scaled to draw this minimum load current.
A 0.22 μF capacitor should be placed from the
MIC2940A input to ground if there is more than 10
inches of wire between the input and the AC filter
capacitor or if a battery is used as the input.
4.2
Programming the Output Voltage
(MIC2941A)
The MIC2941A may be programmed for any output
voltage between its 1.235V reference and its 26V
maximum rating. An external pair of resistors is
required, as shown in the MIC2941A Adjustable
Regulator Typical Application Circuit.
EQUATION 4-1:
V OUT = V REF 1 + R1
------- – I FB R1
R2
Where:
VREF = The nominal 1.235V reference voltage.
IFB = The adjust pin bias current (nom. 20 nA).
The minimum recommended load current of 1 μA
forces an upper limit of 1.2 MΩ on the value of R2, if the
regulator must work with no load (a condition often
found in CMOS in standby), IFB will produce a –2%
typical error in VOUT which may be eliminated at room
temperature by trimming R1. For better accuracy,
choosing R2 = 100 kΩ reduces this error to 0.17%
2018 - 2022 Microchip Technology Inc. and its subsidiaries
while increasing the resistor program current to 12 μA.
Because the MIC2941A typically draws 100 μA at no
load with SHUTDOWN open-circuited, this is a
negligible addition.
4.3
Reducing Output Noise
In reference applications, it may be advantageous to
reduce the AC noise present at the output. One method
is to reduce the regulator bandwidth by increasing the
size of the output capacitor. This is relatively inefficient,
as increasing the capacitor from 1 μF to 220 μF only
decreases the noise from 430 μV to 160 μVRMS for a
100 kHz bandwidth at 5V output. Noise can be reduced
by a factor of four with the MIC2941A by adding a
bypass capacitor across R1.
EQUATION 4-2:
1
C BYPASS = -----------------------------------------2 R1 200Hz
Pick a bypass capacitor of about 0.01 µF. When doing
this, the output capacitor must be increased to 22 μF to
maintain stability. These changes reduce the output
noise from 430 μV to 100 μVRMS for a 100 kHz
bandwidth at 5V output. With the bypass capacitor
added, noise no longer scales with output voltage so
that improvements are more dramatic at higher output
voltages.
4.4
Automotive Applications
The MIC2940A is ideally suited for automotive
applications for a variety of reasons. It will operate over
a wide range of input voltages with very low dropout
voltages (40 mV at light loads), and very low quiescent
currents (240 μA typical). These features are
necessary for use in battery powered systems, such as
automobiles. It is a “bulletproof” device with the ability
to survive both reverse battery (negative transients up
to 20V below ground), and load dump (positive
transients up to 60V) conditions. A wide operating
temperature range with low temperature coefficients is
yet another reason to use these versatile regulators in
automotive designs.
4.75V
OUTPUT
VOLTAGE
ERROR
NOT *
VALID
NOT *
VALID
5V
INPUT
VOLTAGE
FIGURE 4-1:
1.3V
ERROR Output Timing.
DS20006000B-page 13
MIC2940A/41A
5.0
PACKAGING INFORMATION
5.1
Package Marking Information
TO-220*
(Fixed)
Example
XXXXXXXX
X.XXX YYWW
WNNNP
TO-263*
(Fixed)
MIC2940A
3.3WT 2134
4KL5P
Example
XXXXXXXX
XXXX YYWW
WNNNP
Legend: XX...X
Y
YY
WW
NNN
e3
*
MIC2940A
12WU 2212
2K0BP
TO-220*
(Adj.)
XXXX
XXX
WNNNP
TO-263*
(Adj.)
XXXX
XXX
WNNNP
Example
2941
AWT
8C43P
Example
2941
AWU
39G1P
Product code or customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC® designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
●, ▲, ▼ Pin one index is identified by a dot, delta up, or delta down (triangle
mark).
Note:
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information. Package may or may not include
the corporate logo.
Underbar (_) and/or Overbar (‾) symbol may not be to scale.
Note:
If the full seven-character YYWWNNN code cannot fit on the package, the following truncated codes are
used based on the available marking space:
6 Characters = YWWNNN; 5 Characters = WWNNN; 4 Characters = WNNN; 3 Characters = NNN;
2 Characters = NN; 1 Character = N
DS20006000B-page 14
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC2940A/41A
3-Lead TO-220 Package Outline and Recommended Land Pattern
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006000B-page 15
MIC2940A/41A
3-Lead TO-263 Package Outline and Recommended Land Pattern
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging.
DS20006000B-page 16
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC2940A/41A
5-Lead TO-220 Package Outline and Recommended Land Pattern
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006000B-page 17
MIC2940A/41A
5-Lead TO-263 Package Outline and Recommended Land Pattern
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging.
DS20006000B-page 18
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC2940A/41A
APPENDIX A:
REVISION HISTORY
Revision A (April 2018)
• Converted Micrel document MIC2940A/41A to
Microchip data sheet DS20006000A.
• Minor text changes throughout.
• Corrected bold values in Electrical Characteristics
table.
Revision B (February 2022)
• Updated the Package Marking Information drawings with the most current marking information.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006000B-page 19
MIC2940A/41A
NOTES:
DS20006000B-page 20
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC2940A/41A
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office.
Device
-X.X
X
X
-XX
Part No.
Output
Voltage
Junction
Temp. Range
Package
Media Type
MIC2940A:
Device:
Output Voltage:
Junction
Temperature
Range:
Package:
Media Type:
MIC2941A:
3.3 =
5.0 =
12 =
=
W
=
T
=
U
=
1.25A Low Dropout Voltage Regulator,
Fixed Output Voltage
1.25A Low Dropout Voltage Regulator,
Adjustable Output Voltage + Shutdown
3.3V (MIC2940A only)
5.0V (MIC2940A only)
12V (MIC2940A only)
Adjustable (MIC2941A only)
Examples:
a) MIC2940A-3.3WT:
MIC2940A, 3.3V Output
Voltage, –40°C to +125°C
Temperature Range, 3-Lead
TO-220, 50/Tube
b) MIC2940A-3.3WU-TR:
MIC2940A, 3.3V Output
Voltage, –40°C to +125°C
Temperature Range, 3-Lead
TO-263, 750/Reel
c) MIC2940A-5.0WU:
MIC2940A, 5.0V Output
Voltage, –40°C to +125°C
Temperature Range, 3-Lead
TO-263, 50/Tube
d) MIC2940A-12WT:
MIC2940A, 12V Output
Voltage, –40°C to +125°C
Temperature Range, 3-Lead
TO-220, 50/Tube
e) MIC2940A-12WU-TR:
MIC2940A, 12V Output
Voltage, –40°C to +125°C
Temperature Range, 3-Lead
TO-263, 750/Reel
f) MIC2941AWT:
MIC2941A, Adjustable Output
Voltage, –40°C to +125°C
Temperature Range, 3-Lead
TO-220, 50/Tube
g) MIC2941AWU:
MIC2941A, Adjustable Output
Voltage, –40°C to +125°C
Temperature Range, 5-Lead
TO-263, 50/Tube
h) MIC2941AWU-TR:
MIC2941A, Adjustable Output
Voltage, –40°C to +125°C
Temperature Range, 5-Lead
TO-263, 750/Reel
–40°C to +125°C, RoHS-Compliant*
3-Lead TO-220 (MIC2940A)
5-Lead TO-220 (MIC2941A)
3-Lead TO-263 (MIC2940A)
5-Lead TO-263 (MIC2941A)
= 50/Tube
TR =
750/Reel (TO-263 Package only)
* RoHS-compliant with “high-melting solder” exemption.
Note 1:
2018 - 2022 Microchip Technology Inc. and its subsidiaries
Tape and Reel identifier only appears in the
catalog part number description. This identifier is
used for ordering purposes and is not printed on
the device package. Check with your Microchip
Sales Office for package availability with the
Tape and Reel option.
DS20006000B-page 21
MIC2940A/41A
NOTES:
DS20006000B-page 22
2018 - 2022 Microchip Technology Inc. and its subsidiaries
Note the following details of the code protection feature on Microchip products:
•
Microchip products meet the specifications contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is secure when used in the intended manner, within operating specifications, and
under normal conditions.
•
Microchip values and aggressively protects its intellectual property rights. Attempts to breach the code protection features of
Microchip product is strictly prohibited and may violate the Digital Millennium Copyright Act.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of its code. Code protection does not
mean that we are guaranteeing the product is “unbreakable”. Code protection is constantly evolving. Microchip is committed to
continuously improving the code protection features of our products.
This publication and the information herein may be used only
with Microchip products, including to design, test, and integrate
Microchip products with your application. Use of this information in any other manner violates these terms. Information
regarding device applications is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your
specifications. Contact your local Microchip sales office for
additional support or, obtain additional support at https://
www.microchip.com/en-us/support/design-help/client-supportservices.
THIS INFORMATION IS PROVIDED BY MICROCHIP "AS IS".
MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED,
WRITTEN OR ORAL, STATUTORY OR OTHERWISE,
RELATED TO THE INFORMATION INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A
PARTICULAR PURPOSE, OR WARRANTIES RELATED TO
ITS CONDITION, QUALITY, OR PERFORMANCE.
IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL, OR CONSEQUENTIAL LOSS, DAMAGE, COST, OR EXPENSE OF ANY
KIND WHATSOEVER RELATED TO THE INFORMATION OR
ITS USE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS
BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES
ARE FORESEEABLE. TO THE FULLEST EXTENT
ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON
ALL CLAIMS IN ANY WAY RELATED TO THE INFORMATION
OR ITS USE WILL NOT EXCEED THE AMOUNT OF FEES, IF
ANY, THAT YOU HAVE PAID DIRECTLY TO MICROCHIP
FOR THE INFORMATION.
Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to
defend, indemnify and hold harmless Microchip from any and
all damages, claims, suits, or expenses resulting from such
use. No licenses are conveyed, implicitly or otherwise, under
any Microchip intellectual property rights unless otherwise
stated.
Trademarks
The Microchip name and logo, the Microchip logo, Adaptec,
AnyRate, AVR, AVR logo, AVR Freaks, BesTime, BitCloud,
CryptoMemory, CryptoRF, dsPIC, flexPWR, HELDO, IGLOO,
JukeBlox, KeeLoq, Kleer, LANCheck, LinkMD, maXStylus,
maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo,
MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower,
PICSTART, PIC32 logo, PolarFire, Prochip Designer, QTouch,
SAM-BA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash,
Symmetricom, SyncServer, Tachyon, TimeSource, tinyAVR, UNI/O,
Vectron, and XMEGA are registered trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
AgileSwitch, APT, ClockWorks, The Embedded Control Solutions
Company, EtherSynch, Flashtec, Hyper Speed Control, HyperLight
Load, IntelliMOS, Libero, motorBench, mTouch, Powermite 3,
Precision Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, QuietWire, SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub,
TimePictra, TimeProvider, TrueTime, WinPath, and ZL are
registered trademarks of Microchip Technology Incorporated in the
U.S.A.
Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any
Capacitor, AnyIn, AnyOut, Augmented Switching, BlueSky,
BodyCom, CodeGuard, CryptoAuthentication, CryptoAutomotive,
CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net,
Dynamic Average Matching, DAM, ECAN, Espresso T1S,
EtherGREEN, GridTime, IdealBridge, In-Circuit Serial
Programming, ICSP, INICnet, Intelligent Paralleling, Inter-Chip
Connectivity, JitterBlocker, Knob-on-Display, maxCrypto, maxView,
memBrain, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo,
MPLIB, MPLINK, MultiTRAK, NetDetach, NVM Express, NVMe,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple
Blocker, RTAX, RTG4, SAM-ICE, Serial Quad I/O, simpleMAP,
SimpliPHY, SmartBuffer, SmartHLS, SMART-I.S., storClad, SQI,
SuperSwitcher, SuperSwitcher II, Switchtec, SynchroPHY, Total
Endurance, TSHARC, USBCheck, VariSense, VectorBlox, VeriPHY,
ViewSpan, WiperLock, XpressConnect, and ZENA are trademarks
of Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated in
the U.S.A.
The Adaptec logo, Frequency on Demand, Silicon Storage
Technology, Symmcom, and Trusted Time are registered
trademarks of Microchip Technology Inc. in other countries.
GestIC is a registered trademark of Microchip Technology Germany
II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in
other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2018 - 2022, Microchip Technology Incorporated and its subsidiaries.
All Rights Reserved.
For information regarding Microchip’s Quality Management Systems,
please visit www.microchip.com/quality.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
ISBN: 978-1-5224-9780-6
DS20006000B-page 23
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://www.microchip.com/
support
Web Address:
www.microchip.com
Australia - Sydney
Tel: 61-2-9868-6733
India - Bangalore
Tel: 91-80-3090-4444
China - Beijing
Tel: 86-10-8569-7000
India - New Delhi
Tel: 91-11-4160-8631
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
China - Chengdu
Tel: 86-28-8665-5511
India - Pune
Tel: 91-20-4121-0141
China - Chongqing
Tel: 86-23-8980-9588
Japan - Osaka
Tel: 81-6-6152-7160
China - Dongguan
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Japan - Tokyo
Tel: 81-3-6880- 3770
China - Guangzhou
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Philippines - Manila
Tel: 63-2-634-9065
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Tel: 65-6334-8870
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Tel: 86-24-2334-2829
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Tel: 886-7-213-7830
China - Suzhou
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Taiwan - Taipei
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China - Wuhan
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Thailand - Bangkok
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Vietnam - Ho Chi Minh
Tel: 84-28-5448-2100
Atlanta
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Fax: 678-957-1455
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Tel: 774-760-0087
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Chicago
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Tel: 631-435-6000
San Jose, CA
Tel: 408-735-9110
Tel: 408-436-4270
Canada - Toronto
Tel: 905-695-1980
Fax: 905-695-2078
DS20006000B-page 24
China - Xiamen
Tel: 86-592-2388138
China - Zhuhai
Tel: 86-756-3210040
Denmark - Copenhagen
Tel: 45-4485-5910
Fax: 45-4485-2829
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Tel: 39-0331-742611
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Tel: 46-8-5090-4654
UK - Wokingham
Tel: 44-118-921-5800
Fax: 44-118-921-5820
2018 - 2022 Microchip Technology Inc. and its subsidiaries
09/14/21
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