MIL-PRF-38534 AND 38535 CERTIFIED FACILITY
DUAL POSITIVE/NEGATIVE,
3 AMP, LOW DROPOUT
FIXED VOLTAGE REGULATORS
5000
SERIES
FEATURES:
Dual Low Dropout Voltage
Internal Short Circuit Current Limit
Output Voltages Are Internally Set To ±1% Max
Electrically Isolated Case
Internal Thermal Overload Protection
Many Output Voltage Combinations
Alternate Package and Lead Form Configurations Available
Equivalent Rad Hard Device MSK5930RH Series
DESCRIPTION:
The MSK5000 Series offers low dropout voltages on both the positive and negative regulators. This, combined with the
low θJC, allows increased output current while providing exceptional device efficiency. Because of the increased efficiency,
a small hermetic 5 pin package can be used providing maximum performance while occupying minimal board space. Output
voltages are internally trimmed to ±1% maximum resulting in consistent and accurate operation. Additionally, both regulators
offer internal short circuit current and thermal limiting, which allows circuit protection and eliminates the need for external
components and excessive derating.
EQUIVALENT SCHEMATIC
PIN-OUT INFORMATION
TYPICAL APPLICATIONS
High Efficiency Linear Regulators
Constant Voltage/Current Regulators
System Power Supplies
Switching Power Supply Post Regulators
1
2
3
4
5
+VIN
+VOUT
GND
-VIN
-VOUT
CASE=ISOLATED
1
8548-81 Rev. K 2/15
ABSOLUTE MAXIMUM RATINGS
±VIN
PD
IOUT
TJ
Input Voltage (WRT VOUT)
Power Dissipation
Output Current
Junction Temperature
9
±30V
Internally Limited
±3A
+150°C
TST
TLD
Storage Temperature Range 10
Lead Temperature Range
(10 Seconds)
Case Operating Temperature
MSK5000-5009
MSK5000B-5009B
ESD Rating
TC
ELECTRICAL SPECIFICATIONS
Parameter
Test Conditions
Group A
3
MSK5000B SERIES
-65°C to +150°C
300°C
-40°C to +85°C
-55°C to +125°C
Class 2
MSK5000 SERIES
Units
Subgroup
Min.
Typ.
Max.
Min.
Typ.
Max.
1
-
0.1
1.0
-
0.1
2.0
%
POSITIVE OUTPUT REGULATORS:
IOUT=0A; VIN=VOUT+3V
Output Voltage Tolerance
Dropout Voltage
2
2,3
-
0.1
2.0
-
-
-
%
0A≤IOUT≤3A; ∆VOUT=50mV
1
-
1.3
1.5
-
1.3
1.6
V
100mA≤IOUT≤3A
1
-
0.2
1
-
0.2
2
%
VIN=VOUT+3V
2,3
-
0.3
2
-
-
-
%
Load Regulation
IOUT=0A
1
-
0.1
0.5
-
0.1
0.6
%
(VOUT+3V)≤VIN≤(VOUT+15V)
2,3
-
0.2
.75
-
-
-
%
VIN=VOUT+3V; IOUT=0A
1,2,3
-
10
15
-
10
15
mA
VIN=VOUT+5V
-
3.2
4
-
3.0
4
-
A
IOUT=3A; COUT=25µF; f=120Hz
-
60
75
-
60
75
-
dB
JUNCTION TO CASE @ Tc=125°C
-
-
4.3
4.5
-
4.3
4.6
°C/W
1
-
0.1
1.0
-
0.1
2.0
%
Line Regulation
Quiescent Current
Short Circuit Current
2
Ripple Rejection
2
2
Thermal Resistance
NEGATIVE OUTPUT REGULATORS:
Output Voltage Tolerance
2
Dropout Voltage
Load Regulation
Line Regulation
Quiescent Current
Short Circuit Current
Ripple Rejection
Thermal Resistance
2
2
2
8
IOUT=0A; VIN=VOUT+3V
2,3
-
0.1
2.0
-
-
-
%
0A≤IOUT≤3A; ∆VOUT=50mV
1
-
0.8
1.2
-
0.8
1.3
V
VIN=VOUT+3V
1
-
0.2
1
-
0.2
2
%
100mA≤IOUT≤3A
2,3
-
0.3
2
-
-
-
%
IOUT=0A
1
-
.1
.5
-
.1
.6
%
(VOUT+3V)≤VIN≤(VOUT+15V)
2,3
-
.2
.75
-
-
-
%
VIN=VOUT+3V; IOUT=0A
1,2,3
-
4.5
10
-
4.5
10
mA
VIN=VOUT+5V
-
3.0
3.5
-
3.0
3.5
-
A
IOUT=3A; COUT=25µF; f=120Hz
-
60
75
-
60
75
-
dB
JUNCTION TO CASE @ Tc=125°C
-
-
4.5
4.7
-
4.5
4.8
°C/W
PART 7 OUTPUT VOLTAGES
NUMBER POSITIVE NEGATIVE
NOTES:
1 Outputs are decoupled to ground using 33µF minimum low ESR capacitors unless otherwise specified.
2 Guaranteed by design but not tested. Typical parameters are representative of actual device
performance but are for reference only.
3 All output parameters are tested using a low duty cycle pulse to maintain TJ = TC.
4 Industrial devices shall be tested to subgroup 1 unless otherwise specified.
5 Military grade devices ("H" suffix) shall be 100% tested to subgroups 1,2 and 3.
6 Subgroup 1 TA=TC=+25°C
Subgroup 2 TA=TC=+125°C
Subgroup 3 TA=TC=-55°C
7 Please consult the factory if alternate output voltages are required.
8 Input voltage (VIN=VOUT + a specified voltage) is implied to be more negative than VOUT.
9 Continuous operation at or above absolute maximum ratings may adversely effect the device
performance and/or life cycle.
10 Internal solder reflow temperature is 180°C, do not exceed.
2
MSK5000
+3.3V
-5.2V
MSK5001
+5.0V
-5.0V
MSK5002
+5.0V
-5.2V
MSK5003
+12.0V
-5.0V
MSK5004
+12.0V
-12.0V
MSK5005
+15.0V
-15.0V
MSK5006
+15.0V
-5.0V
MSK5007
+5.0V
-12.0V
MSK5008
+5.0V
-15.0V
MSK5009
+10.0V
-10.0V
8548-81 Rev. K 2/15
APPLICATION NOTES
BYPASS CAPACITORS
OVERLOAD SHUTDOWN
For most applications a 33uF minimum, low ESR (0.5-2 ohm)
tantalum capacitor should be attached as close to the regulator's
output as possible. This will effectively lower the regulator's output
impedance, increase transient response and eliminate any oscillations that are normally associated with low dropout regulators.
Additional bypass capacitors can be used at the remote load
locations to further improve regulation. These can be either of the
tantalum or the electrolytic variety. Unless the regulator is located
very close to the power supply filter capacitor(s), a 4.7uF minimum
low ESR (0.5-2 ohm) tantalum capacitor should also be added to the
regulator's input. An electrolytic may also be substituted if desired.
When substituting electrolytic in place of tantalum capacitors, a
good rule of thumb to follow is to increase the size of the electrolytic
by a factor of 10 over the tantalum value.
The regulators feature both power and thermal overload protection. When the maximum power dissipation is not exceeded, the
regulators will current limit slightly above their 3 amp rating. As the
VIN-VOUT voltage increases, however, shutdown occurs in relation
to the maximum power dissipation curve. If the device heats enough
to exceed its rated die junction temperature due to excessive ambient temperature, improper heat sinking etc., the regulators also
shutdown until an appropriate junction temperature is maintained. It
should also be noted that in the case of an extreme overload, such
as a sustained direct short, the device may not be able to recover.
In these instances, the device must be shut off and power reapplied
to eliminate the shutdown condition.
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.
LOAD REGULATION
For best results the ground pin should be connected directly to
the load as shown below, this effectively reduces the ground loop
effect and eliminates excessive voltage drop in the sense leg. It is
also 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 .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. Refer
to Figure 2 for connection diagram.
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
MSK5002 TYPICAL APPLICATION:
EXAMPLE:
Low Dropout Positive and Negative Power Supply
This example demonstrates an analysis where each regulator is
at one-half of its maximum rated power dissipation, which occurs
when the output currents are at 1.5 amps each.
Conditions for MSK5002:
VIN = ±7.0V; Iout = ±1.5A
1.) Assume 45° heat spreading model.
2.) Find positive regulator power dissipation:
FIGURE 1
Pd = (VIN - VOUT)(Iout)
Pd = (7-5)(1.5)
= 3.0W
Avoiding Ground Loops
3.) For conservative design, set Tj = +125°C Max.
4.) For this example, worst case Ta = +90°C.
5.) Rθjc = 4.5°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 - 90°C)/3.0W - 4.5°C/W - 0.15°C/W
= 7.0°C/W
The same exercise must be performed for the negative regulator. In
this case the result is 7.0°C/W. Therefore, a heat sink with a thermal
resistance of no more than 7.0°C/W must be used in this application
to maintain both regulator circuit junction temperatures under 125°C.
FIGURE 2
3
8548-81 Rev. K 2/15
TYPICAL PERFORMANCE CURVES
4
8548-81 Rev. K 2/15
MECHANICAL SPECIFICATIONS
ESD TRIANGLE INDICATES PIN 1
WEIGHT=7.7 GRAMS TYPICAL
MSK5000 B T U
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
LEAD CONFIGURATIONS
S= STRAIGHT; U= BENT UP; D= BENT DOWN
PACKAGE STYLE
T= TOP TAB
SCREENING
BLANK=INDUSTRIAL; B=MIL-PRF-38534 CLASS H
GENERAL PART NUMBER
(VOLTAGE)
THE ABOVE EXAMPLE IS A +3.3V, -5.2V MILITARY REGULATOR USING THE TOP TAB PACKAGE WITH
LEADS BENT UP.
5
8548-81 Rev. K 2/15
MECHANICAL SPECIFICATIONS CONT'D
ESD TRIANGLE INDICATES PIN 1
WEIGHT=7.5 GRAMS TYPICAL
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
MSK5000 B Z U
LEAD CONFIGURATIONS
S= STRAIGHT; U= BENT UP; D= BENT DOWN
PACKAGE STYLE
Z= Z PACK
SCREENING
BLANK=INDUSTRIAL; B=MIL-PRF-38534 CLASS H
GENERAL PART NUMBER
(VOLTAGE)
6
8548-81 Rev. K 2/15
REVISION HISTORY
MSK
www.anaren.com/msk
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.
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8548-81 Rev. K 2/15