MIL-PRF-38534 AND 38535 CERTIFIED FACILITY
HIGH CURRENT, LOW DROPOUT
SURFACE MOUNT
VOLTAGE REGULATORS
FEATURES:
Hermetic Surface Mount Package
Extremely Low Dropout Voltage: 350mV @ 3 Amps
Available in 1.5V, 1.7V, 1.8V, 1.9V, 2.5V, 3.3V, 5.0V and 12.0V
On Board Thermal Shut Down
Reverse Battery and Load Dump Protection
Low Ground Current: 42mA Typical at Full Load
1% Maximum Guaranteed Accuracy
Output Current to 3 Amps
Alternate Output Voltages Available
5230
SERIES
DESCRIPTION:
The MSK5230 series voltage regulators are available in +1.5V, +1.7V, +1.8V, +1.9V, +2.5V, +3.3V, +5.0V, and +12.0V
output configurations. All boast ultra low dropout specifications due to the utilization of a super PNP output pass transistor
with monolithic technology. Dropout voltages of 350mV at 3 amps are typical in this configuration, which drives efficiency up
and power dissipation down. Accuracy is guaranteed with a 1% maximum output voltage tolerance. The MSK5230 series is
packaged in a space efficient 3 pin power surface mount ceramic package.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
High Efficiency, High Current Linear Regulators
Constant Voltage/Current Regulators
System Power Supplies
Switching Power Supply Post Regulators
Battery Powered Equipment
1
PIN-OUT INFORMATION
1 V
IN
2 V
OUT
3 Ground
LID=ISOLATED
8548-39 Rev. J 4/15
ABSOLUTE MAXIMUM RATINGS
V
INP
V
IN
V
EN
I
OUT
Input Voltage (100mS 1%D.C.)
Input Voltage
Enable Voltage
Output Current
10
-20V to +60V
26V
-0.3V to 26V
3.0A
T
ST
T
LD
T
J
Storage Temperature Range
Lead Temperature
(10 Seconds Soldering)
Operating Temperature
MSK5230 Series
MSK5230H Series
ESD Rating
-65°C to +150°C
300°C
-40°C to +85°C
-55°C to +125°C
Class 2
ELECTRICAL SPECIFICATIONS
Parameter
Output Voltage Tolerance
Test Conditions 1 3
I
OUT
= 10mA; V
IN
= V
OUT
+1V
∆V
OUT
= -1%; I
OUT
= 100 mA
∆V
OUT
= -1%; I
OUT
= 3A
10 mA
≤
I
OUT
≤
2.5A
(V
OUT
+1V)
≤
V
IN
≤
26V
I
OUT
= 10 mA
9
V
OUT
= 0V; V
IN
= V
OUT
+1V
V
IN
= V
OUT
+1V; I
OUT
= 1.5A
V
IN
= V
OUT
+1V; I
OUT
= 3A
C
L
= 20µF; 10 H
Z
≤
f
≤
100 KH
Z
Junction to Case @ 125°C
T
J
Group A
Subgroup
1
2, 3
1
1
1
2, 3
1
2, 3
-
-
-
-
-
-
MSK5230H SERIES
Min.
Typ.
Max.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
±0.5
±1.0
80
350
±0.2
±0.3
±0.05
±0.5
4.5
20
42
400
3.3
130
±1.0
±2.0
200
600
±1.0
±2.0
±0.5
±1.0
5.0
45
-
-
3.7
-
MSK5230 SERIES
Min.
Typ.
Max.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
±0.5
-
80
350
±0.2
±0.3
±0.05
±0.5
4.5
20
42
400
3.3
130
±1.0
-
225
625
±1.2
-
±0.6
-
5.0
45
-
-
3.9
-
Units
%
%
mV
mV
%
%
%
%
A
mA
mA
µV
°C/W
°C
Dropout Voltage
Load Regulation
2
8
Line Regulation
Output Current Limit 2
Ground Current
Output Noise 2
Thermal Resistance 2
Thermal Shutdown 2
2 8
NUMBER
MSK5230-1.5
MSK5230-1.7
MSK5230-1.8
MSK5230-1.9
AGE
7
+1.5V
+1.7V
+1.8V
+1.9V
+2.5V
+3.3V
+5.0V
+12.0V
NOTES:
MSK5230-2.5
1
Output decoupled to ground using 47µF minimum capacitor unless otherwise specified.
2 This parameter is guaranteed by design but need not be tested.
MSK5230-3.3
Typical parameters are representative of actual device performance but are for reference only.
MSK5230-5.0
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.
MSK5230-12
5
Military grade devices ('H' suffix) shall be 100% tested to subgroups 1,2,3.
6
Subgroup 1 T
C
= +25°C
Subgroup 2 T
J
= +125°C
Subgroup 3 T
A
= -55°C
7 Please consult the factory if alternate output voltages are required.
8 Due to current limit, maximum output current may not be available at all values of V
IN
-V
OUT
and temperatures.
See typical performance curves for clarification.
9 The output current limit function provides protection from transient overloads but it may exceed the maximum continuous rating.
Continuous operation in current limit may damage the device.
10 Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle.
2
8548-39 Rev. J 4/15
APPLICATION NOTES
REGULATOR PROTECTION:
The MSK5230 series is fully protected against reversed input
polarity, overcurrent faults, overtemperature conditions (Pd)
and transient voltage spikes of up to 60V. If the regulator is
used in dual supply systems where the load is returned to a
negative supply, the output voltage must be diode clamped
to ground.
PACKAGE CONNECTIONS:
The MSK5230 series are highly thermally conductive de-
vices and the thermal path from the package heat sink to
the internal junctions is very short. Standard surface mount
soldering techniques should be used when mounting the
device. Some applications may require additional heat
sinking of the device.
OUTPUT CAPACITOR:
The output voltage ripple of the MSK5230 series voltage
regulators can be minimized by placing a filter capacitor from
the output to ground. The optimum value for this capacitor
may vary from one application to the next, but a minimum of
20µF is recommended for optimum performance. Transient
load response can also be improved by placing a capacitor
directly across the load. The capacitor should not be an
ultra-low ESR type. Tantalum capacitors are best for fast
load transients but aluminum electrolytics will work fine in
most applications.
HEAT SINK SELECTION:
To select a heat sink for the MSK5230, the following formula
for convective heat flow may be used.
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
Ta = Ambient Temperature
First, the power dissipation must be calculated as follows:
Power Dissipation = (Vin - Vout) x Iout
Next, the user must select a maximum junction temperature.
The absolute maximum allowable junction temperature is
125°C. The equation may now be rearranged to solve for
the required heat sink to ambient thermal resistance (Rθsa).
EXAMPLE:
An MSK5230-3.3 is configured for Vin=+5V and Vout=+3.3V.
Iout is a continuous 1A DC level. The ambient temperature is
+25°C. The maximum desired junction temperature is 125°C.
Rθjc
= 3.3°C/W and Rθcs = 0.5°C/W typically.
Power Dissipation = (5V - 3.3V) x (1A)
= 1.7 Watts
Solve for Rθsa:
Rθsa
= 125°C - 25°C - 3.3°C/W - 0.5°C/W
1.7W
In this example, a heat sink with a thermal resistance of
no more than 55°C/W must be used to maintain a junction
temperature of no more than 125°C.
LOAD CONNECTIONS:
In voltage regulator applications where very large load
currents are present, the load connection is very important.
The path connecting the output of the regulator to the load
must be extremely low impedance to avoid affecting the
load regulation specifications. Any impedance in this path
will form a voltage divider with the load.
MINIMIZING POWER DISSIPATION:
Many applications can not take full advantage of the ex-
tremely low dropout specifications of the regulator due to
large input to output voltage differences. The simple circuit
below illustrates a method to reduce the input voltage at the
regulator to just over the dropout specification to keep the
internal power dissipation minimized:
[
]
For a given continuous maximum load of 1 amp, R1 can be
selected to drop the voltage seen at the regulator to 4V. This
allows for the output tolerance and dropout specifications.
Input voltage variations (5V) also should be included in the
calculations. The resistor should be sized according to the
power levels required for the application.
3
8548-39 Rev. J 4/15
TYPICAL PERFORMANCE CURVES
4
8548-39 Rev. J 4/15
MECHANICAL SPECIFICATIONS
WEIGHT=2.3 GRAMS TYPICAL
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
MSK5230-3.3 H
SCREENING
BLANK= INDUSTRIAL; H= MIL-PRF-38534 CLASS H
OUTPUT VOLTAGE
1.5=+1.5V; 1.7=+1.7V; 1.8=+1.8V; 1.9= +1.9V;
2.5=+2.5V; 3.3=+3.3V; 5.0=+5.0V; 12=+12.0V
GENERAL PART NUMBER
The above example is a +3.3V, Military regulator.
5
8548-39 Rev. J 4/15
测试/测量
