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ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP. FEATURES:
HIGH CURRENT, SUPER LOW DROPOUT FIXED VOLTAGE REGULATORS
5010
SERIES
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088 Extremely Low Dropout Voltage 0.45V @ 10 Amps Available in 3.3V, 5.0V and 12.0V versions Output Voltages Are Internally Set to 1.5% maximum TTL Level Enable Pin Electrically Isolated Case Low Quiescent Current Output Current to 10 Amps Available in Two Package Styles Available with Three Lead Form Options
MIL-PRF-38534 QUALIFIED
DESCRIPTION:
The MSK 5010 series voltage regulators are available in a +3.3V, +5.0V or +12.0V fixed output configuration. All three boast ultra low dropout specifications due to the utilization of a MOSFET output pass transistor with extremely low Rds(on). Dropout voltages of 0.45V at 10 amps are typical, in this configuration, which drives efficiency up and power dissipation down. Accuracy is guaranteed with a 1.5% maximum initial output voltage tolerance that varies only 2% with temperature. The MSK 5010 series is packaged in a space efficient 5 pin SIP that is electrically isolated from the internal circuitry allowing direct heat sinking for maximum heat dissipation.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
High Efficiency, High Current Linear Regulators Constant Voltage/Current Regulators System Power Supplies Switching Power Supply Post Regulators
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Rev. H 10/02
ABSOLUTE MAXIMUM RATINGS

TC
ELECTRICAL SPECIFICATIONS
Parameter Output Voltage Tolerance Dropout Voltage 2 Load Regulation Line Regulation Quiescent Current Ripple Rejection 2 Thermal Resistance 2 Enable Input Voltage 2 Enable Input Current 2 Output Settling Time 2 8 Test Conditions 3 IOUT=100mA; VIN=VOUT+3V IOUT= 0A IOUT=10A VIN=VOUT+3V 100mA IOUT 9A (VOUT +1.5V) VIN (VOUT+15V) IOUT=100mA VEN=VIN; VIN=VOUT+3V; IOUT=0A 2 VEN=0V; VIN=VOUT+3V; IOUT=0A f=120Hz Junction to Case HIGH LOW HIGH LOW To within 10mV Group A MSK 5010B/E SERIES Subgroup 1 2,3 1 1 1 2,3 1 2,3 1,2,3 1,2,3 1 1 1 1 Min. 2.4 Typ. 0.3 1.0 0.002 0.45 0.5 0.5 0.3 0.5 4.5 0.15 45 0.7 1.2 1.2 12.5 0.8 5 Max. 1.5 2.0 0.010 0.75 1.0 2.0 1.0 1.0 10 5.0 0.8 0.8 50 25 MSK 5010 SERIES Min. 2.4 Typ. 0.5 0.002 0.5 0.5 0.5 4.5 0.15 45 0.7 1.2 1.2 20 10 5 Max. Units 1.5 0.015 1.0 1.5 1.5 10 5.0 1.0 0.8 50 25 % % V V % % % % mA A dB C/W V V A A S
NOTES:
1 Output decoupled to ground using 47F minimum capacitor unless otherwise specified. 2 Guaranteed by design but not tested. Typical parameters are representative of actual device 3 All output parameters are tested using a low duty cycle pulse to maintain TJ = TC. 4 Industrial grade and "E" suffix 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=+25C
PART 7 OUTPUT NUMBER VOLTAGE
MSK5010-3.3 MSK5010-5.0 MSK5010-12 +3.3V +5.0V +12.0V
performance but are for reference only.
Subgroup 2 TA=TC=+125C Subgroup 3 TA=TC= -55C 7 Please consult the factory if alternate output voltages are required. 8 After application of enable pulse
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Rev. H 10/02

VIN VEN IOUT TJ
Input Voltage Enable Voltage Output Current Junction Temperature
36V -0.3V to 36V 10A within SOA +175C
TST TLD
Storage Temperature Range -65C to +150C Lead Temperature Range 300C (10 Seconds) Case Operating Temperature MSK5010 Series -40C to +85C MSK5010B/E Series -55C to +125C
APPLICATION NOTES MINIMIZING OUTPUT RIPPLE:
The output voltage ripple of the MSK 5010 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 and is best determined by experimentation. Transient load response can also be improved by placing a (10uF to 20uF) capacitor directly across the load.
HEAT SINK SELECTION:
To select a heat sink for the MSK 5010, the following formula for convective heat flow must 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 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 175C. The equation may now be rearranged to solve for the required heat sink to ambient thermal resistance (Rsa). EXAMPLE; An MSK 5010-3.3 is configured for Vin = +7V and Vout = +3.3V. Iout is a continuous 10A DC level. The ambient temperature is +25C. The maximum desired junction temperature is 150C. Rjc = 0.8C/W and Rcs = 0.15C/W typically. Power Dissipation = (7V - 3.3V) x (10A) = 37 Watts Solve for Rsa: Rsa = 150C - 25C - 0.8C/W - 0.15C/W 37W In this example, a heat sink with a thermal resistance of no more than 2.43C/W must be used to maintain a junction temperature of no more than 150C. The Thermalloy Corporation makes a heat sink with a thermal resistance of 2.2C/W that would work well for this application. (See Thermalloy part number 7023)
CASE CONNECTIONS:
The case of the MSK 5010 is electrically isolated from the internal circuitry so that a direct connection can be made to the heat sink for most efficient heat dissipation. However, it may be necessary in some applications to connect the case to ground. Grounding the case will help eliminate oscillations and produce a clean, noise free output.
LOAD REGULATION:
For best results, the ground pin should be connected directly to the load (see next note). 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 a load current of 1 amp.
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 same holds true for the connection from the low end of the load to ground. For best load regulation, the low end of the load must be connected directly to pin 2 of the MSK 5010 and not to a ground plane inches away from the hybrid.
POWER DISSIPATION:
The output pass transistor in the MSK 5010 is rated to dissipate nearly 100 watts. The limiting factor of this device is effective dissipation of heat generated under such conditions. For example, to dissipate 100 watts, calculations show that the MSK 5010 would have to be bolted to the underbelly of a submarine submerged in the Arctic Ocean! Careful consideration must be paid to heat dissipation and junction temperature when applying this device.
ENABLE/SHUTDOWN PIN:
The MSK 5010 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 a maximum of 5A of quiescent current.
CHARGE CAPACITOR:
For all applications, the user must connect a 1.0uF capacitor from pin 5 directly to ground. This capacitor is part of the circuit which drives the gate of the internal MOSFET. Approximately three times the voltage seen on the input will appear across this capacitor. Careful attention must be paid to capacitor voltage rating since voltages larger than the power supply are present.
3
Rev. H 10/02
TYPICAL PERFORMANCE CURVES
4
Rev. H 10/02
MECHANICAL SPECIFICATIONS
TOP TAB Z- TAB
NOTE: ESD Triangle indicates Pin 1. ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED
MSK5010-3.3 B T U
ORDERING INFORMATION
LEAD CONFIGURATIONS S= STRAIGHT; U= BENT UP; D= BENT DOWN PACKAGE STYLE T= TOP TAB; Z= Z PACK SCREENING BLANK=INDUSTRIAL; E=EXTENDED RELIABILITY B=MIL-PRF-38534 CLASS H OUTPUT VOLTAGE 3.3=+3.3V; 5=+5.0V; 12=+12.0V GENERAL PART NUMBER
THE ABOVE EXAMPLE IS A +3.3V, MILITARY REGULATOR USING THE TOP TAB PACKAGE WITH LEADS BENT UP.
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.
M.S. Kennedy Corp.
5
Rev. H 10/02

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