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ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
NEGATIVE, 3 AMP, LOW DROPOUT VOLTAGE REGULATOR
5332
SERIES
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088
FEATURES:
-5V, -5.2V, -10V, -12V and -15V Standard Versions Low Dropout Voltage Output Current to 3 Amps Output Voltage Internally Set to 1% MAX. Internal Short Circuit Current Limit Internal Thermal Overload Protection Lead Form Options: Straight, Up, Down and Gull Wing Alternate Output Voltages Available Available with Top Tab or Tabless Package
MIL-PRF-38534 CERTIFIED
TOP TAB
NO TAB DESCRIPTION:
The MSK 5332 is a fixed, negative voltage regulator which offers low dropout and output voltage accuracy to 1% maximum. The low jc combined with low dropout allows increased output current and excellent device efficiency. The MSK 5332 offers both internal current limit and thermal overload protection. The case of the device is electrically isolated for heat sinking purposes. The device is packaged in a space efficient 3 pin power package with various lead form options. The MSK 5332 series is also available in a power package with a top tab to accomodate direct mounting to a heat sink.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
High Efficiency Linear Regulators Constant Voltage/Current Regulators System Power Supplies Switching Power Supply Post Regulators
PIN-OUT INFORMATION
1 GND 2 VIN 3 VOUT
1
Rev. B 8/05
ABSOLUTE MAXIMUM RATINGS

TC
-55C to +125C -40C to +85C
ELECTRICAL SPECIFICATIONS
Group A Parameter Test Conditions
3
MSK 5332H/E Typ. 0.1 0.1 0.8 0.2 0.3 0.1 0.2 4.5 4.5 -3.6 75 5.6 Max. 1.0 2.0 1.2 1.0 2.0 0.5 0.75 10 10 -3.3 7.0 Min. 60 -
MSK 5332 Typ. 0.1 0.8 0.2 0.1 4.5 -3.6 75 5.6 Units Max. 2.0 1.3 2.0 0.6 12 -3.0 7.5 % % V % % % % mA mA A dB C/W
Subgroup Min. 1 Output Voltage Tolerance Dropout Voltage 2 Load Regulation VIN=VOUT+3V IOUT=10mA Line Regulation (VOUT+3V)VIN(VOUT+15V) Quiescent Current Short Circuit Current 2 Ripple Rejection 2 Thermal Resistance 2 VIN=VOUT+3V; IOUT=10mA 2,3 VIN=VOUT+5V IOUT=3A; COUT=25F; f=120Hz JUNCTION TO CASE @ 125C 2,3 1 2,3 1 IOUT=10mA; VIN=VOUT+3V 2,3 0AIOUT3A; VOUT=1% 10mAIOUT3A 1 1 60 -
PART NUMBER
MSK5332-5.0 MSK5332-5.2 MSK5332-10 MSK5332-12
OUTPUT VOLTAGE
7
-5.0V -5.2V -10.0V -12.0V -15.0V
NOTES:
1 Output is decoupled to ground using 33F minimum, low ESR capacitors unless otherwise specified. 2 Guaranteed by design but not 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 "E" suffix devices shall be tested to subgroup 1 unless otherwise specified. 5 Military grade devices ("H" suffix) shall be 100% tested to subgroups 1,2 and 3. 6 Subgroup 1 TA=TC=+25C 2 TA=TC=+125C 3 TA=TC=-55C 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.
MSK5332-15
2
Rev. B 8/05

-VIN PD IOUT TJ
Input Voltage (WRT VOUT) Power Dissipation Output Current Junction Temperature
-30V Internally Limited -3A +175C
TST TLD
Storage Temperature Range Lead Temperature Range (10 Seconds) Case Operating Temperature MSK 5332H/E MSK 5332
-65C to +150C 300C
APPLICATION NOTES BYPASS CAPACITORS
For most applications a 33uF 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.
OVERLOAD SHUTDOWN
The MSK 5332 features both power and thermal overload protection. When the maximum power dissipation is not exceeded, the regulator will current limit slightly above its 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 regulator will 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. 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 Tc = Case Temperature Ta = Ambient Temperature Ts = Heat Sink Temperature EXAMPLE: This example demonstrates an analysis where the regulator is at one-half of its maximum rated power dissipation, which occurs when the output current is at 1.5 amps. Conditions for MSK 5332-5: Vin = -7.0V; Iout = -1.5A 1.) Assume 45 heat spreading model. 2.) Find regulator power dissipation:
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 1 for connection diagram.
MSK 5332 TYPICAL APPLICATION:
Low Dropout Negative Power Supply
FIGURE 1
Pd = (Vin - Vout)(Iout) Pd = (-7-(-5))(-1.5) = 3.0W 3.) For conservative design, set Tj = +125C Max. 4.) For this example, worst case Ta = +90C. 5.) Rjc = 7.0C/W from the Electrical Specification Table. 6.) Rcs = 0.15C/W for most thermal greases. 7.) Rearrange governing equation to solve for Rsa: Rsa= ((Tj - Ta)/Pd) - (Rjc) - (Rcs) = (125C - 90C)/3.0W - 7.0C/W - 0.15C/W = 4.5C/W In this case the result is 4.5C/W. Therefore, a heat sink with a thermal resistance of no more than 4.5C/W must be used in this application to maintain the regulator junction temperature under 125C. 3 Rev. B 8/05
TYPICAL PERFORMANCE CURVES
4
Rev. B 8/05
MECHANICAL SPECIFICATIONS
ESD Triangle Indicates Pin 1. NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
MSK5332-5.0 H T D
LEAD CONFIGURATIONS (GULL WING NOT AVAILABLE WITH TOP TAB VERSION) S= STRAIGHT; U= BENT UP; D= BENT DOWN PACKAGE STYLE T=TOP TAB; BLANK=NO TAB SCREENING BLANK= INDUSTRIAL; E=EXTENDED RELIABILITY H= MIL-PRF-38534 CLASS H OUTPUT VOLTAGE 5.0=-5.0V; 5.2=-5.2V; 10=-10.0V; 12=-12.0V; 15=-15.0V GENERAL PART NUMBER
5
Rev. B 8/05
MECHANICAL SPECIFICATIONS
ESD Triangle Indicates Pin 1. NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
MSK5332-5.0 H G
LEAD CONFIGURATIONS (GULL WING NOT AVAILABLE WITH TOP TAB VERSION) S= STRAIGHT; U= BENT UP; D= BENT DOWN; G=GULL WING PACKAGE STYLE T=TOP TAB; BLANK=NO TAB SCREENING BLANK= INDUSTRIAL; E=EXTENDED RELIABILITY H= MIL-PRF-38534 CLASS H OUTPUT VOLTAGE 5.0=-5.0V; 5.2=-5.2V; 10=-10.0V; 12=-12.0V; 15=-15.0V GENERAL PART NUMBER The above example is a -5.0V, Class H Military regulator with gull wing leads.
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.
6
Rev. A 7/05

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