ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
FEATURES:
DUAL POSITIVE/NEGATIVE,
3 AMP, ULTRA LOW DROPOUT
FIXED VOLTAGE REGULATORS
5200
SERIES
4707 Dey Road Liverpool, N.Y. 13088
Ultra Low Dropout Voltage
Internal Short Circuit Current Limit
Output Voltages Are Internally Set To ±1% Maximum
Electrically Isolated Case
Internal Thermal Overload Protection
Many Output Voltage Combinations
Alternate Package and Lead Form Configurations Available
(315) 701-6751
MIL-PRF-38534 QUALIFIED
DESCRIPTION:
The MSK 5200 Series offers ultra low dropout voltages on both the positive and negative regulators. This,
combined with the low
θ
JC
, 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 occupy-
ing 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
High Efficiency Linear Regulators
Constant Voltage/Current Regulators
System Power Supplies
Switching Power Supply Post Regulators
1
1
2
3
4
5
PIN-OUT INFORMATION
+Vin
+Vout
GND
-Vin
-Vout
Rev. C 7/00
ABSOLUTE MAXIMUM RATINGS
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T
C
Parameter
POSITIVE OUTPUT REGULATORS:
Output Voltage Tolerance
Dropout Voltage
Load Regulation
Line Regulation
Quiescent Current
Short Circuit Current
2
Ripple Rejection
2
Thermal Resistance
2
NEGATIVE OUTPUT REGULA-
TORS:
Output Voltage Tolerance
2
9
Test Conditions
1 3
Group A MSK 5200(H) SERIES
Subgroup
1
2,3
1
1
2,3
1
2,3
1,2,3
-
-
-
1
2,3
1
1
2,3
1
2,3
1,2,3
-
-
-
Min.
-
-
-
-
-
-
-
-
3.2
60
-
-
-
-
-
-
-
-
-
3.2
60
-
Typ.
0.5
1.0
350
0.2
0.3
0.1
0.5
10
4.5
75
2.5
0.1
0.1
550
0.3
0.5
0.1
0.5
4.5
3.6
75
2.0
Max.
1.0
2.0
600
1.0
2.0
0.5
1.0
15
5.0
-
2.8
1.0
2.0
700
1.5
2.5
0.5
1.0
10
5.0
-
2.4
MSK 5200 SERIES
Min.
-
-
-
-
-
-
-
-
3.0
60
-
-
-
-
-
-
-
-
-
3.0
60
-
Typ.
0.5
1.0
350
0.2
0.3
0.1
0.5
10
4.5
75
2.5
0.1
-
550
0.3
0.5
0.1
0.5
4.5
3.6
75
2.0
Max.
1.5
-
625
1.2
-
0.6
-
15
5.0
-
2.8
2.0
-
750
1.7
-
0.6
-
10
5.0
-
2.4
V
IN
=V
OUT
+1V
I
OUT
=0A
I
OUT
=2A; ∆V
OUT
=-1%
100mA≤I
OUT
≤3A
V
IN
=V
OUT
+1V
I
OUT
=0A
(V
OUT
+1V)≤V
IN
≤(26V)
V
IN
=V
OUT
+1V; I
OUT
=0A
V
IN
=V
OUT
+1V
I
OUT
=3A; C
OUT
=25µF; f=120Hz
JUNCTION TO CASE
V
IN
=V
OUT
+1.5V
I
OUT
=
OA
I
OUT
=2A; ∆V
OUT
=-1%
V
IN
=V
OUT
+1.5V
100mA≤I
OUT
≤3A
I
OUT
=0A
(V
OUT
+1.5V)≤V
IN
≤(26V)
V
IN
=V
OUT
+1.5V; I
OUT
=0A
2
Dropout Voltage
Load Regulation
Line Regulation
Quiescent Current
Ripple Rejection
Thermal Resistance
2
V
IN
=V
OUT
+1V
I
OUT
=3A; C
OUT
=25µF; f=120Hz
JUNCTION TO CASE
Short Circuit Current
2
2
NOTES:
1
2
3
4
5
6
7
8
9
Outputs are decoupled to ground using 20µF minimum
tantalum capacitors unless otherwise specified.
This parameter is guaranteed by design but need not be tested.
Typical parameters are representative of actual device performance but are for reference only.
All output parameters are tested using a low duty cycle pulse to maintain T
J
= T
C
.
Industrial grade devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ('H' suffix) shall be 100% tested to subgroups 1,2,3 and 4.
Subgroup 5 and 6 testing available upon request.
Subgroup 1,4
T
C
= +25°C
Subgroup 2,5
T
J
= +125°C
Subgroup 3,6
T
A
= -55°C
Please consult the factory if alternate output voltages are required.
Input voltage (V
IN =
V
OUT +
a specified voltage) is implied to be more negative than V
OUT
.
PART
8
NUMBER
MSK
MSK
MSK
MSK
MSK
MSK
MSK
MSK
MSK
MSK
MSK
5200(H)
5201(H)
5202(H)
5203(H)
5204(H)
5205(H)
5206(H)
5207(H)
5208(H)
5209(H)
5210(H)
OUTPUT VOLTAGES
POSITIVE NEGATIVE
+3.3V
+5.0V
+5.0V
+12.0V
+12.0V
+15.0V
+15.0V
+5.0V
+5.0V
+10.0V
+5.2V
-5.2V
-5.0V
-5.2V
-5.0V
-12.0V
-15.0V
-5.0V
-12.0V
-15.0V
-10.0V
-5.2V
2
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ELECTRICAL SPECIFICATIONS
Rev. C 7/00
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±V
IN
P
D
I
OUT
T
J
Input Voltage
Power Dissipation
Output Current
Junction Temperature
±26V
Internally Limited
±3.5A
+175°C
T
ST
T
LD
Storage Temperature Range -65°C to +150°C
Lead Temperature Range
300°C
(10 Seconds)
Case Operating Temperature
MSK5200-5210
-40°C to +125°C
MSK5200H-5210H
-55°C to +125°C
Units
%
%
mV
%
%
%
%
mA
A
dB
°C/W
%
%
mV
%
%
%
%
mA
A
dB
°C/W
APPLICATION NOTES
BYPASS CAPACITORS:
For most applications a 20uF, tantalum capacitor should be
attached as close to the regulator's output as possible. This
will effectively lower the regulator's output impedance, improve
transient response and eliminate any oscillations that may be
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
tantalum capacitor should also be added to the regulator's in-
put. 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.
OVERLOAD SHUTDOWN:
The regulators feature both current and thermal overload
protection. When the maximum power dissipation is not ex-
ceeded, the regulators will current limit slightly above their 3
amp rating. As the Vin-Vout voltage increases, however, shut-
down occurs in relation to the maximum power dissipation curve.
If the device heats enough to exceed its rated die junction tem-
perature 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:
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 di-
rectly affects the load regulation. If 20 gauge wire were used
as an example, 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.
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 (R
θ
jc + R
θ
cs + R
θ
sa) + Ta
WHERE
Tj = Junction Temperature
Pd = Total Power Dissipation
R
θ
j = 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 each regulator is
at one-half of its maximum rated power dissipation, which oc-
curs when the output currents are at 1.5 amps each.
Conditions for MSK 5202:
Vin = ±7.0V; Iout = ±1.5A
1.) Assume 45° heat spreading model.
2.) Find positive regulator power dissipation:
Pd = (Vin - Vout)(Iout)
Pd = (7-5)(1.5)
Pd = 3.0W
For conservative design, set Tj = +125°C Max.
For this example, worst case Ta = +90°C.
R
θ
jc = 2.5°C/W from the Electrical Specification Table.
R
θ
cs = 0.15°C/W for most thermal greases.
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)/3.0W - (2.5°C/W) - ( 0.15°C/W)
= 9.15°C/W
The same exercise must be performed for the negative regula-
tor. In this case the result is 9.15°C/W. Therefore, a heat sink
with a thermal resistance of no more than 9.1°C/W must be
used in this application to maintain both regulator circuit junc-
tion temperatures under 125°C.
Rev. C 7/00
3
3.)
4.)
5.)
6.)
7.)
MSK 5202 TYPICAL APPLICATION:
Low Dropout Positive and Negative Power Supply
FIGURE 1
Avoiding Ground Loops
FIGURE 2
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