MIL-PRF-38534 CERTIFIED
M.S.KENNEDY CORP.
FEATURES:
DUAL RAD HARD
+/-
VOLTAGE REGULATOR
5901RH
SERIES
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088
Total Dose Tested to 50K RAD(Si) (Method 1019.7 Condition A)
Internal Thermal Overload Protection
Output Current to 1.5 Amps
Output Voltage Internally Trimmed to ±1% Accuracy
Lead Form Options: Straight and Gull Wing
Alternate Voltage Combinations Available
Contact MSK for MIL-PRF-38534 Qualification Status
MSK590XRH
DESCRIPTION:
MSK590XRHG
The MSK 5901RH series are dual Radiation Hardened +/- voltage regulators offering low dropout and output accuracy
to ±1% maximum. Excellent line and load regulation characteristics ensure highly accurate performance. The MSK
5901RH 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
TYPICAL APPLICATIONS
Switching Power Supply Post Regulators
Constant Voltage/Current Regulators
High Efficiency Linear Regulators
PIN-OUT INFORMATION
1
2
3
4
5
6
7
8
9
10
1
-VRTN
-VOUT
-VOUT
-VOUT
-VOUT
+VRTN
+VOUT
+VOUT
+VOUT
+VOUT
20
19
18
17
16
15
14
13
12
11
-VIN
-VIN
-VIN
-VIN
-Ccomp
+Ccomp
+VIN
+VIN
+VIN
+VIN
Rev. E 10/07
ABSOLUTE MAXIMUM RATINGS
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7
-40°C to +85°C
-55°C to +125°C
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ELECTRICAL SPECIFICATIONS
Parameter
POSITIVE OUTPUT REGULATORS:
Output Voltage Tolerance
I
OUT
=10mA; V
IN
=V
OUT
+3V
1
2,3
Post Radiation
Dropout Voltage
I
OUT
=0.5A;
∆V
OUT
=1%
10mA≤I
OUT
≤0.5A
V
IN
=V
OUT
+3V
Post Radiation
Line Regulation
I
OUT
=10mA
V
OUT
+3V≤V
IN
≤35V
Thermal Resistance
1
Test Conditions
8
Group A MSK 590XRH K/H/E
3
Subgroup
Typ.
Min.
Max.
4
MSK 590XRH
2
Min.
Typ.
Max.
-
-
-
-
-
-
-
-
-
-
-
±0.2
±0.8
±1.0
1.6
1.9
±0.2
±0.4
±1.0
±0.6
±1.0
9.5
±1.0
±3.0
±2.7
3.0
3.0
±2.0
±2.5
±3.0
±1.5
±2.5
10.5
-
-
-
-
-
-
-
-
-
-
-
±0.2
-
±1.0
1.6
-
±0.2
-
±1.0
±0.6
-
9.5
±1.5
-
±3.0
3.5
-
±2.5
-
±3.0
±2.0
-
1
1
2,3
Load Regulation
1
2,3
1
1
2,3
-
JUNCTION TO CASE @ 125°C
11.0 °C/W
NEGATIVE OUTPUT REGULATORS:
Output Voltage Tolerance
I
OUT
=10mA; V
IN
=V
OUT
-3V
1
2,3
Post Radiation
Dropout Voltage
I
OUT
=0.5A;
∆V
OUT
=1%
10mA≤I
OUT
≤0.5A
V
IN
=V
OUT
-3V
Post Radiation
Line Regulation
I
OUT
=10mA
-30V≤V
IN
≤V
OUT
-3V
Thermal Resistance
1
JUNCTION TO CASE @ 125°C
1
1
2,3
Load Regulation
1
2,3
1
1
2,3
-
-
-
-
-
-
-
-
-
-
-
-
±0.2
±0.8
±1.5
1.9
1.5
±0.2
±0.4
±1.5
±0.1
±0.2
11.5
±1.0
±3.0
±2.7
3.0
3.0
±2.0
±2.5
±3.0
±1.5
±2.5
12.5
-
-
-
-
-
-
-
-
-
-
-
±0.2
-
±1.5
1.9
-
±0.2
-
±1.5
±0.1
-
11.5
±1.5
-
±3.0
3.0
-
±2.5
-
±3.0
±2.0
-
%
%
%
V
V
%
%
%
%
%
13.0 °C/W
NOTES:
1
2
3
4
Guaranteed by design but not tested. Typical parameters are representative of actual device
performance but are for reference only.
Industrial grade and "E" suffix 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 T
A
=T
C
=+25°C
Subgroup 2 T
A
=T
C
=+125°C
Subgroup 3 T
A
=T
C
=-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.
Pre and post irradiation limits at 25°C, up to 25Krad TID, are identical unless otherwise specified.
PART
5
NUMBER
MSK5901
MSK5902
MSK5903
MSK5904
MSK5905
MSK5906
MSK5907
MSK5908
MSK5909
OUTPUT VOLTAGES
POSITIVE
5.0
5.0
12.0
12.0
15.0
15.0
5.0
5.0
10.0
NEGATIVE
5.0
5.2
5.0
12.0
15.0
5.0
12.0
15.0
10.0
5
6
7
8
2
Rev. E 10/07
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+V
IN
-V
IN
P
D
+I
OUT
-I
OUT
T
J
+Input Voltage (V
IN
-V
OUT
)
-Input Voltage (V
IN
-V
OUT
)
Power Dissipation
+Output Current
-Output Current
Junction Temperature
+40V
DC
-40V
DC
Internally Limited
1.5A
1.5A
+150°C
T
ST
Storage Temperature Range
T
LD
Lead Temperature Range
(10 Seconds)
T
C
Case Operating Temperature
MSK 5901RH-5909RH
MSK 5901RH-5909RH(K/H/E)
-65°C to +150°C
300°C
Units
%
%
%
V
V
%
%
%
%
%
APPLICATION NOTES
CAPACITOR SELECTION
POSITIVE REGULATOR
INPUT CAPACITOR:
An input bypass capacitor is recommenced when using the
MSK 5901 series regulators. This is especially true if the regu-
lator 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 out-
put capacitor larger than 10µF will only improve output imped-
ance.
+C
COMP
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 neces-
sary to add a protection diode to protect the regulator from ca-
pacitor 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.
LOAD REGULATION
It is important to keep the output connection between the regu-
lator 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.
HEAT SINKING
To determine if a heat sink is required for your application
and if so, what type, refer to the thermal model and govern-
ing equation below.
Governing Equation: Tj = Pd x (R
θ
jc + R
θ
cs + R
θ
sa) + Ta
WHERE
Tj = Junction Temperature
Pd = Total Power Dissipation
R
θ
jc = Junction to Case Thermal Resistance
R
θ
cs = Case to Heat Sink Thermal Resistance
R
θ
sa = Heat Sink to Ambient Thermal Resistance
Tc = Case Temperature
Ta = Ambient Temperature
Ts = Heat Sink Temperature
EXAMPLE:
This example demonstrates an analysis where the output cur-
rents are at 0.5 amp each and both inputs are 8V.
Conditions for MSK 5901RH:
+Vin = +8.0V; Iout = 0.5A Positive 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 = +90°C.
5.) R
θ
jc = 10.5°C/W from the Electrical Specification Table.
6.) R
θ
cs = 0.15°C/W for most thermal greases.
7.) Rearrange governing equation to solve for R
θ
sa:
R
θ
sa= ((Tj - Ta)/Pd) - (R
θ
jc) - (R
θ
cs)
= (125°C-90°C)/1.5W - 10.5°C/W - 0.15°C/W
= 12.7°C/W
The same exercise must be performed for the negative regula-
tor.
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.
OUTPUT CAPACITOR:
A minimum of a 1µF solid tantalum capacitor should also be
used at the output to insure stability. Any increase of this out-
put capacitor larger than 10µF will only improve output imped-
ance.
-C
COMP
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 neces-
sary to add a protection diode to protect the regulator from ca-
pacitor 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.
TYPICAL APPLICATION CIRCUIT
TOTAL DOSE RADIATION TEST
PERFORMANCE
Radiation performance curves for TID testing have been
generated for all radiation testing performed by MS Kennedy.
These curves show performance trends throughout the TID
test process and can be located in the MSK 5901RH radia-
tion test report. The complete radiation test report is avail-
able in the RAD HARD PRODUCTS section on the MSK
website.
http://www.mskennedy.com/store.asp?pid=9951&catid=19680
3
Rev. E 10/07
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