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MIL-PRF-38534 CERTIFIED
M.S.KENNEDY CORP. FEATURES:
HIGH CURRENT, LOW DROPOUT VOLTAGE REGULATORS
5101
SERIES
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088 Extremely Compact 10 Pin Flatpack With Metal Base Extremely Low Dropout Voltage: 350mV @ 1.5 Amps Available in 3.3V, 5.0V, 12.0V and Adjustable Versions Open Collector Error Flag Output Available on Fixed Voltage Versions TTL Level Enable Pin: Zero Current Shutdown Mode Reverse Battery and Load Dump Protection Low Ground Current: 22mA Typical at Full Load 1% Guaranteed Accuracy Output Current to 1.5 Amps Contact MSK for MIL-PRF-38534 Qualification status.
DESCRIPTION:
The MSK 5101 series voltage regulators are available in +3.3V, +5.0V, +12.0V or adjustable 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 1.5 amps are typical in this configuration, which drives efficiency up and power dissipation down. Accuracy is guaranteed with a 1% output voltage tolerance. The series also offers a TTL/CMOS compatible on/off enable function as well as an output flag pin on the fixed voltage versions. The MSK 5101 series is packaged in a space efficient 10 pin ceramic flatpack with a built in metal base.
EQUIVALENT SCHEMATIC
Schematic shown for fixed output voltage versions
TYPICAL APPLICATIONS
High Efficiency, High Current Linear Regulators Constant Voltage/Current Regulators System Power Supplies Switching Power Supply Post Regulators Battery Powered Equipment 1 2 3 4 5 6 7 8 9 10
PIN-OUT INFORMATION
MSK5101-00 NC Enable Vin A Vin B NC Vout A Vout B NC Adj NC MSK5101-3.3,-5.0,-12 1 2 3 4 5 6 7 8 9 10 NC Enable Vin A Vin B NC Vout A Vout B Vout C NC Flag
BASE The base of the package is electrically connected to ground.
1 Rev. G 1/06
ABSOLUTE MAXIMUM RATINGS
VINP VIN VEN IOUT
10
TJ
-40C to +85C -55C to +125C
ELECTRICAL SPECIFICATIONS
Parameter Test Conditions
13
Group A MSK 5101H/E SERIES Subgroup 1 Min. 2.4 1.22 Typ. 0.5 1.0 80 350 0.2 0.3 0.05 0.5 2.1 8 22 400 100 10 0.01 0.2 75 1.24 20 40 5.6 135 Max. 1.0 2.0 200 600 1.0 2.0 0.5 1.0 3.5 20 0.8 600 2 500 2 0.4 1.26 120 6.0 -
MSK 5101 SERIES Min. 2.4 1.22 Typ. 0.5 80 350 0.2 0.3 0.05 0.5 2.1 8 22 400 100 10 0.01 0.2 75 1.24 20 40 5.6 135 Max. 1.0 225 625 1.2 0.6 3.5 20 0.8 600 2 500 2 0.4 1.26 150 7 Units % % mV mV % % % % A mA mA V V V A A A A V mV V ppm/C nA C/W C
Output Voltage Tolerance 8
IOUT=10mA; VIN=VOUT+1V 2,3 VOUT=-1%; IOUT=100m A VOUT=-1%; IOUT=1.5A VIN=VOUT+1V 10mA IOUT 1.25A (VOUT +1V) VIN 26V IOUT=10mA 1 1 1 2,3 1 2,3 1 1 1 1 1 1 -
Dropout Voltage 2
Load Regulation
9
Line Regulation Output Current Limit 2 Ground Current Output Noise
2 2
VOUT=0V; VIN=VOUT+1V VIN=VOUT+1V; IOUT=0.75A VIN=VOUT+1V; IOUT=1.5A CL=10F; 10Hz f 100KHz HIGH/ON LOW/OFF
Enable Input Voltage 2
Enable Input Current 2 Shutdown Output Current 2 Flag Output Leakage
28
HIGH/ON LOW/OFF VENABLE 0.8V VOH=26V IOL 250A; VIN=VOUT-2V VIN=VOUT-7% Normal Operation
27
Flag Output On Voltage 8 Flag Threshold
28
Reference Voltage 7 Reference Voltage Temp Drift Adjust Pin Bias Current 2 7 Thermal Resistance Thermal Shutdown
2
Normal Operation Full Temp; VIN=VOUT+1V Junction to Case @ 125C TJ
NOTES:
1 Output decoupled to ground using 10F minimum capacitor 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 and class E devices shall be tested to subgroups 1 and 4 unless otherwise specified. 5 Military grade devices ('H' suffix) shall be 100% tested to subgroups 1,2,3 and 4. TC=+25C 6 Subgroup 1,4 Subgroup 2 TJ=+125C Subgroup 3 TA=-55C 7 Applies to MSK5101-00 adjustable version only. 8 Applies to fixed output devices only. 9 Due to current limit, maximum output current may not be available at all values of VIN-VOUT and temperatures. See typical performance curves for clarification. 10 Continuous operation at or above absolute maximum ratings may adversly effect the device performance and/or life cycle.
PART NUMBER
MSK5101-00 MSK5101-3.3 MSK5101-5.0 MSK5101-12
OUTPUT VOLTAGE
Adjustable +3.3V +5.0V +12.0V
2
Rev. G

Input Voltage (100mS 1%D.C.) -20V to +60V Input Voltage 26V Enable Voltage -0.3V to 26V Output Current 3.5A

TST TLD
Storage Temperature Range Lead Temperature (10 Seconds Soldering) Operating Temperature MSK5101 Series MSK5101H/E Series
-65C to +150C 300C
1/06
APPLICATION NOTES REGULATOR PROTECTION:
The MSK 5101 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.
HEAT SINK SELECTION:
To select a heat sink for the MSK 5100, the following formula for convective heat flow may be used. Governing Equation: Tj = Pd x (Rjc + Rcs + Rsa) + Ta WHERE: Tj = Junction Temperature Pd = Total Power Dissipation Rjc = Junction to Case Thermal Resistance Rcs = Case to Heat Sink Thermal Resistance Rsa = Heat Sink to Ambient Thermal Resistance Ta = Ambient Temperature
OUTPUT CAPACITOR:
The output voltage ripple of the MSK 5101 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 10F is recommended for optimum performance. Transient load response can also be improved by placing a capacitor directly across the load.
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. The MSK 5101 series requires a minimum of 10mA of load current to stay in regulation.
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 maximum allowable junction temperature is 125C. The equation may now be rearranged to solve for the required heat sink to ambient thermal resistance (Rsa). EXAMPLE: An MSK 5101-3.3 is configured for Vin=+5V and Vout=+3.3V. Iout is a continuous 1A DC level. The ambient temperature is +25C. The maximum desired junction temperature is 125C. Rjc = 6C/W and Rcs = 0.5C/W typically. Power Dissipation = (5V - 3.3V) x (1A) = 1.7 Watts Solve for Rsa: Rsa = 125C - 25C - 6C/W - 0.5C/W 1.7W = 52.3C/W In this example, a heat sink with a thermal resistance of no more than 52C/W must be used to maintain a junction temperature of no more than 125C.
ENABLE PIN:
The MSK 5101 series of voltage regulators are equipped with a TTL compatible ENABLE pin. A TTL high level on this pin activates the internal bias circuit and powers up the device. A TTL low level on this pin places the controller in shutdown mode and the device draws approximately 10A of quiescent current. If the enable function is not used, simply connect the enable pin to the input.
FLAG OUTPUT PIN:
All of the fixed output voltage versions of the MSK 5101 series are equipped with a flag output pin. Since the flag pin is an open collector configuration it can be pulled up to any voltage between 3V and 26V. This feature allows direct interfacing to practically any logic. This active low output has a typical level of 0.22V when the flag comparator detects an "out of regulation" condition. Flag states include low input voltage and output current limit. Extremely high level input voltage transients will also cause the flag output pin to activate.
DEVICE SOLDERING/CASE CONNECTION: MSK5101-00 OUTPUT ADJUSTMENT:
The MSK 5101-00 is an adjustable version in the series of high performance regulators. The diagram below illustrates proper adjustment technique for the output voltage. The series resistance of R1+R2 should be selected to pass the minimum regulator output current requirement of 10mA. The MSK 5101 series are highly thermally conductive devices and the thermal path from the package base to the internal junctions is very short. Standard surface mount techniques should be used when soldering the device into a circuit board. The external heat sink/pad needs to be connected to ground because the base of the MSK 5101 is also electrically connected to ground. The user is urged to keep this in mind when designing the printed circuit board for the MSK 5101. There should be no printed circuit traces making contact with the base of the device except for ground. The ground plane can be used to pull heat away from the device.
3
Rev. G
1/06
TYPICAL PERFORMANCE CURVES
4
Rev. G
1/06
MECHANICAL SPECIFICATIONS
WEIGHT= 0.3 GRAMS TYPICAL NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED. ESD Triangle indicates Pin 1.
ORDERING INFORMATION
MSK5101-3.3 H
SCREENING BLANK=INDUSTRIAL, E=EXTENDED RELIABILITY; H=MIL-PRF-38534 CLASS H OUTPUT VOLTAGE 00=Adjustable; 3.3=+3.3V; 5.0=+5.0V; 12=+12.0V GENERAL PART NUMBER The above example is a +3.3V, Military regulator.
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. Please visit our website for the most recent revision of this datasheet. Contact MSK for MIL-PRF-38534 qualification status.
5
Rev. G
1/06

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