ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
DUAL POSITIVE/NEGATIVE,
3 AMP, LOW DROPOUT
FIXED VOLTAGE REGULATORS
4707 Dey Road Liverpool, N.Y. 13088
5000
SERIES
(315) 701-6751
MIL-PRF-38534 CERTIFIED
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
Available Fully Qualified to Mil-PRF-38534
Alternate Package and Lead Form Configurations Available
DESCRIPTION:
The MSK 5000 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
TYPICAL APPLICATIONS
PIN-OUT INFORMATION
High Efficiency Linear Regulators
Constant Voltage/Current Regulators
System Power Supplies
Switching Power Supply Post Regulators
1
2
3
4
5
1
+Vin
+Vout
GND
-Vin
-Vout
Rev. E 7/00
ABSOLUTE MAXIMUM RATINGS
±VIN
PD
IOUT
TJ
Input Voltage (WRT VOUT)
Power Dissipation
Output Current
Junction Temperature
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±30V
Internally Limited
±3A
+175°C
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TST
TLD
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TC
Storage Temperature Range
Lead Temperature Range
(10 Seconds)
Case Operating Temperature
MSK 5000-5009
MSK 5000B-5009B
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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
ELECTRICAL SPECIFICATIONS
Parameter
Test Conditions
Group A
3
MSK 5000(B) SERIES
Subgroup Min.
MSK 5000 SERIES
Typ.
Max.
Min.
Typ.
Max.
Units
POSITIVE OUTPUT REGULATORS:
Output Voltage Tolerance
Dropout Voltage
1
-
0.1
1.0
-
0.1
2.0
%
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
-
-
-
%
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
4
-
IOUT=0A; V IN=VOUT+3V
2
Load Regulation
Line Regulation
Quiescent Current
VIN=VOUT+5V
-
3.2
3.0
4
-
A
IOUT=3A; COUT=25µF; f=120Hz
-
60
75
-
60
75
-
dB
JUNCTION TO CASE
-
-
2.5
2.7
-
2.5
2.7
°C/W
IOUT=0A; V IN=VOUT+3V
1
-
0.1
1.0
-
0.1
2.0
%
2,3
-
0.1
2.0
-
-
-
%
Short Circuit Current 2
Ripple Rejection
2
Thermal Resistance 2
NEGATIVE OUTPUT REGULATORS:
Output Voltage Tolerance
8
Dropout Voltage
0A≤IOUT≤3A; ∆VOUT=50mV
1
-
0.8
1.2
-
0.8
1.3
V
Load Regulation
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
3.6
-
Line Regulation
Quiescent Current
Short Circuit Current 2
Ripple Rejection 2
Thermal Resistance
2
VIN=VOUT+5V
-
3.3
3.0
3.6
-
A
IOUT=3A; COUT=25µF; f=120Hz
-
60
75
-
60
75
-
dB
JUNCTION TO CASE
-
-
2.0
2.2
-
2.0
2.2
°C/W
PART 7
NUMBER
1 Outputs are decoupled to ground using 10µF minimum
low ESR capacitors unless otherwise specified.
2 This parameter is guaranteed by design but need not be 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 grade devices shall be tested to subgroup 1 unless otherwise specified.
5 Military grade devices ('B' 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.
2
OUTPUT VOLTAGES
POSITIVE NEGATIVE
MSK5000(B)
+3.3V
-5.2V
MSK5001(B)
+5.0V
-5.0V
MSK5002(B)
+5.0V
-5.2V
MSK5003(B)
+12.0V
-5.0V
MSK5004(B)
+12.0V
-12.0V
MSK5005(B)
+15.0V
-15.0V
MSK5006(B)
+15.0V
-5.0V
MSK5007(B)
+5.0V
-12.0V
MSK5008(B)
+5.0V
-15.0V
MSK5009(B)
+10.0V
-10.0V
Rev. E 7/00
APPLICATION NOTES
BYPASS CAPACITORS
OVERLOAD SHUTDOWN
For most applications a 10uF 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
MSK 5002 TYPICAL APPLICATION:
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
Low Dropout Positive and Negative Power Supply
EXAMPLE:
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 MSK 5002:
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.)
4.)
5.)
6.)
7.)
For conservative design, set Tj = +125°C Max.
For this example, worst case Ta = +90°C.
Rθjc = 2.5°C/W from the Electrical Specification Table.
Rθcs = 0.15°C/W for most thermal greases.
Rearrange governing equation to solve for Rθsa:
Rθsa= ((Tj - Ta)/Pd) - (Rθjc) - (Rθcs)
= (125°C - 90°C)/3.0W - (2.5°C/W - 0.15°C/W)
= 9.32°C/W
The same exercise must be performed for the negative regulator. In this case the result is 9.32°C/W. Therefore, a heat sink
with a thermal resistance of no more than 9.3°C/W must be
used in this application to maintain both regulator circuit junction temperatures under 125°C.
FIGURE 2
3
Rev.E 7/00
TYPICAL PERFORMANCE CURVES
4
Rev. E 7/00
MECHANICAL SPECIFICATIONS
NOTE: ESD Triangle indicates Pin 1.
ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED
ORDERING INFORMATION
MSK5000 B T U
LEAD CONFIGURATIONS
S= STRAIGHT; U= BENT UP; D= BENT DOWN
PACKAGE STYLE
T= TOP TAB; Z= Z PACK
SCREENING
BLANK = INDUSTRIAL; B= MIL-PRF-38534
GENERAL PART NUMBER
(VOLTAGE)
THE ABOVE EXAMPLE IS A: +3.3V, -5.2V MILITARY REGULATOR USING THE
TOP TAB PACKAGE WITH LEADS BENT UP.
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.
5
Rev.E 7/00