MSK MSK5212 Internal thermal overload protection Datasheet

MIL-PRF-38534 AND 38535 CERTIFIED FACILITY
DUAL +/VOLTAGE REGULATOR
5211
SERIES
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
FEATURES:
Internal Thermal Overload Protection
Output Current to 1.5 Amps
Output Voltage Internally Trimmed to ±1% Accuracy
Electrically Isolated Case
Lead Form Options: Straight and Gull Wing
Alternate Voltage Combinations Available
Functionally Equivalent 50K Rad Hard Device MSK 5901RH
Functionally Equivalent 100K Rad Hard Device MSK 5911RH
Contact MSKfor MIL-PRF-38534 Qualification Status
MSK521X
MSK521XG
DESCRIPTION:
The MSK 5211 series are dual +/- voltage regulators offering excellent output accuracy to ±1% maximum. Excellent
line and load regulation characteristics ensure highly accurate performance. The MSK 5211 series regulators are equipped
with internal thermal overload protection. The devices are packaged in a space efficient 20 pin flatpack with two lead form
options, straight and gull wing.
EQUIVALENT SCHEMATIC
PIN-OUT INFORMATION
TYPICAL APPLICATIONS
1
2
3
4
5
6
7
8
9
10
Switching Power Supply Post Regulators
Constant Voltage/Current Regulators
High Efficiency Linear Regulators
System Power Supplies
1
-VRTN
20
-VOUT
19
-VOUT
18
-VOUT
17
-VOUT
16
+VRTN
15
+VOUT
14
+VOUT
13
+VOUT
12
+VOUT
11
CASE=ISOLATED
-VIN
-VIN
-VIN
-VIN
-Ccomp
+Ccomp
+VIN
+VIN
+VIN
+VIN
8548-76 Rev. B 10/12
7
ABSOLUTE MAXIMUM RATINGS
+VIN
-VIN
PD
+IOUT
-IOUT
TJ
+Input Voltage (VIN-VOUT)
-Input Voltage (VIN-VOUT)
Power Dissipation
+Output Current
-Output Current
Junction Temperature
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+40VDC
-40VDC
Internally Limited
1.5A
1.5A
+150°C
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TST Storage Temperature Range
TLD Lead Temperature Range
(10 Seconds)
TC Case Operating Temperature
MSK 5211-5214
MSK 5211-5214H
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-65°C to +150°C
300°C
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-40°C to +85°C
-55°C to +125°C
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ELECTRICAL SPECIFICATIONS
Parameter
Group A
Subgroup
Test Conditions
MSK 521X H
3
MSK 521X
2
Units
4
Min.
Typ.
Max.
Min.
Typ.
Max.
1
-
±0.2
±1.0
-
±0.2
±1.5
%
2,3
-
±0.8
±3.0
-
-
-
%
1
-
1.6
3.0
-
1.6
3.5
V
2,3
-
1.9
3.0
-
-
-
V
10mA≤IOUT≤0.5A
1
-
±0.2
±2.0
-
±0.2
±2.5
%
VIN=VOUT+3V
2,3
-
±0.4
±2.5
-
-
-
%
IOUT=10mA
1
-
±0.6
±1.5
-
±0.6
±2.0
%
VOUT+3V≤VIN≤35V
2,3
-
±1.0
±2.5
-
-
-
%
JUNCTION TO CASE @ 125°C
-
-
12.5
13.5
-
12.5
14.0 °C/W
1
-
±0.2
±1.0
-
±0.2
±1.5
%
2,3
-
±0.8
±3.0
-
-
-
%
1
-
1.9
3.0
-
1.9
3.0
V
2,3
-
1.5
3.0
-
-
-
V
10mA≤IOUT≤0.5A
1
-
±0.2
±2.0
-
±0.2
±2.5
%
VIN=VOUT -3V
2,3
-
±0.4
±2.5
-
-
-
%
IOUT=10mA
1
-
±0.1
±1.5
-
±0.1
±2.0
%
-35V≤VIN≤VOUT-3V
2,3
-
±0.2
±2.5
-
-
-
%
JUNCTION TO CASE @ 125°C
-
-
13.5
14.5
-
13.5
POSITIVE OUTPUT REGULATORS:
IOUT=10mA; VIN=VOUT+3V
Output Voltage Tolerance
IOUT=0.5A; ΔVOUT=1%
Dropout Voltage
Load Regulation
Line Regulation
Thermal Resistance 1
NEGATIVE OUTPUT REGULATORS:
Output Voltage Tolerance
Dropout Voltage
Load Regulation
Line Regulation
Thermal Resistance 1
IOUT=10mA; VIN=VOUT -3V
IOUT=0.5A; ΔVOUT=1%
PART
5
NUMBER
NOTES:
1
2
3
4
5
6
7
Guaranteed by design but not tested. Typical parameters are representative of actual device
performance but are for reference only.
Industrial devices shall be tested to subgroup 1 unless otherwise specified.
Military grade devices shall be 100% tested to subgroups 1,2 and 3.
Subgroup 1 TA=TC=+25°C
Subgroup 2 TA=TC=+125°C
Subgroup 3 TA=TC=-55°C
Please consult the factory if alternate output voltages are required.
For positive regulator, output decoupled to ground using 1μF minimum tantalum capacitor unless
otherwise specified. For negative regulator, output decoupled to ground using 1μF minimum
tantanlum capacitor.
Continuous operation at or above absolute maximum ratings may adversly effect the device
performance and/or life cycle.
2
15.0 °C/W
OUTPUT VOLTAGES
POSITIVE
NEGATIVE
MSK5211
5.0
5.0
MSK5212
10.0
10.0
MSK5213
12.0
12.0
MSK5214
15.0
15.0
8548-76 Rev. B 10/12
APPLICATION NOTES
TYPICAL APPLICATION CIRCUIT
CAPACITOR SELECTION
POSITIVE REGULATOR
INPUT CAPACITOR:
An input bypass capacitor is recommenced when using the
MSK 5211 series regulators. This is especially true if the regulator is located farther than 6 inches from the power supply filter
capacitors. For most applications a 1μF solid tantalum capacitor
will be suitable.
OUTPUT CAPACITOR:
A minimum of a 1μF solid tantalum capacitor should also be
used at the output to insure stability. Any increase of this output capacitor larger than 10μF will only improve output impedance.
LOAD REGULATION
It is important to keep the output connection between the regulator and the load as short as possible since this directly affects
the load regulation. For example, if 20 gauge wire were used
which has a resistance of about 0.008 ohms per foot, this would
result in a drop of 8mV/ft at 1Amp of load current. It is also
important to follow the capacitor selection guidelines to achieve
best performance.
+CCOMP CAPACITOR:
For improved ripple rejection, +Ccomp can be bypassed to
ground with a 10μF tantalum capacitor. This bypass capacitor
will provide 80dB ripple rejection. Increased capacitance above
10μF does not improve the ripple rejection at frequencies above
120Hz. If the Ccomp bypass capacitor is used, it may be necessary to add a protection diode to protect the regulator from capacitor discharge damage. See Typical Applications Circuit for
clarification. If the bypass capacitor is not used, it should be left
open since it is internally connected to the regulator.
HEAT SINKING
To determine if a heat sink is required for your application
and if so, what type, refer to the thermal model and governing equation below.
Governing Equation: Tj = Pd x (Rθjc + Rθcs + Rθsa) + Ta
WHERE
Tj = Junction Temperature
Pd = Total Power Dissipation
Rθjc = Junction to Case Thermal Resistance
Rθcs = Case to Heat Sink Thermal Resistance
Rθsa = Heat Sink to Ambient Thermal Resistance
Tc = Case Temperature
Ta = Ambient Temperature
Ts = Heat Sink Temperature
NEGATIVE REGULATOR
INPUT CAPACITOR:
Once again, if the regulator will be farther than 6 inches from
power supply filter capacitors, then an input capacitor will be
required on the negative regulator. It is recommended that a
1μF solid tantalum capacitor be used.
EXAMPLE:
OUTPUT CAPACITOR:
A minimum of a 1μF solid tantalum capacitor should also be
used at the output to insure stability. Any increase of this output capacitor larger than 10μF will only improve output impedance.
This example demonstrates an analysis where the output currents are at 0.5 amp each and both inputs are 8V.
Conditions for MSK 5211:
+Vin = +8.0V; Iout = 0.5A Positive Regulator
-CCOMP CAPACITOR:
For improved ripple rejection, -Ccomp can be bypassed to
ground with a 10μF tantalum capacitor. This bypass capacitor
will provide 66dB ripple rejection. Increased capacitance above
10μF does not improve the ripple rejection at frequencies above
120Hz. If the Ccomp bypass capacitor is used, it may be necessary to add a protection diode to protect the regulator from capacitor discharge damage. See Typical Applications Circuit for
clarification. If the bypass capacitor is not used, it should be left
open since it is internally connected to the regulator.
1.) Assume 45° heat spreading model.
2.) Find positive regulator power dissipation:
Pd = (Vin - Vout)(Iout)
Pd = (+8V-5V)(0.5A)
Pd = 1.5W
3.) For conservative design, set Tj = +125°C Max.
4.) For this example, worst case Ta = +85°C.
5.) Rθjc = 10.5°C/W from the Electrical Specification Table.
6.) Rθcs = 0.15°C/W for most thermal greases.
7.) Rearrange governing equation to solve for Rθsa:
Rθsa= ((Tj - Ta)/Pd) - (Rθjc) - (Rθcs)
= (125°C-85°C)/1.5W - 13.5°C/W - 0.15°C/W
= 13.0°C/W
The same exercise must be performed for the negative regulator.
3
8548-76 Rev. B 10/12
TYPICAL PERFORMANCE CURVES
4
8548-76 Rev. B 10/12
MECHANICAL SPECIFICATIONS
MSK521X
Weight=4.3 Grams Typical
NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.
ESD Triangle indicates pin 1.
ORDERING INFORMATION
Part
Number
Screening Level
MSK521X
Industrial
MSK521XH
MIL-PRF-38534 CLASS H
X - Designates voltage selection (MSK 5211-5214)
5
8548-76 Rev. B 10/12
MECHANICAL SPECIFICATIONS CONTINUED
MSK521XG
Weight=4.2 Grams Typical
NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.
ESD Triangle indicates pin 1.
ORDERING INFORMATION
Part
Number
Screening Level
MSK521XG
Industrial
MSK521XHG
MIL-PRF-38534 CLASS H
X - Designates voltage selection (MSK 5211-5214)
M.S. Kennedy Corp.
4707 Dey Road, Liverpool, New York 13088
Phone (315) 701-6751
Fax (315) 701-6752
www.mskennedy.com
The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make
changes to its products or specifications without notice, however and assumes no liability for the use of its products.
Please visit our website for the most recent revision of this datasheet.
Contact MSK for MIL-PRF-38534 Class H qualification status.
6
8548-76 Rev. B 10/12
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