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MIL-PRF-38534 AND 38535 CERTIFIED FACILITY 5800RH M.S.KENNEDY CORP. FEATURES: Satellite System Power Supplies Switching Power Supply Post Regulators Constant Voltage/Current Regulators Microprocessor Power Supplies RAD HARD ULTRA LOW DROPOUT ADJUSTABLE POSITIVE LINEAR REGULATOR EQUIVALENT SCHEMATIC TYPICAL APPLICATIONS DESCRIPTION: The MSK5800RH is a rad hard adjustable linear regulator capable of delivering 4.0 amps of output current. Typical dropout is only 0.30 volts with a 1.5 amp load. An external shutdown/reset function is ideal for power supply sequencing. This device also has latching overload protection that requires no external current sense resistor. The MSK5800RH is specifically designed for many space/satellite applications. The device is packaged in a hermetically sealed 12 pin flatpack that is lead formed for surface mount applications. PIN-OUT INFORMATION VIN A VIN B VIN C GND 1 LATCH SHUTDOWN Manufactured using Space Qualified RH1573 Die New "Harder" Version of MSK5900RH Total Dose Hardened to 300 Krads(Si) Ultra Low Dropout for Reduced Power Consumption External Shutdown/Reset Function Latching Overload Protection Adjustable Output Using Two External Resistors Output Current Limit Surface Mount Package Available to DSCC SMD 5962F09216 Low Dose Rate Tested to 100 Krads(Si) (Method 1019.7 Condition D) Neutron Tested to 1.0x10¹² n/cm² (Method 1017.2) VOUT A VOUT B VOUT C GND 2 GND 2 FB 8548-68 Rev. K 6/14 CASE=ISOLATED

(10 Seconds) Power Dissipation Junction Temperature ESD Rating ABSOLUTE MAXIMUM RATINGS +10V 10V -55°C to +125°C -40°C to +85°C Supply Voltage Shutdown Voltage Output Current Case Operating Temperature Range MSK5800RH K/H MSK5800RH -65°C to +150°C 300°C See SOA Curve 150°C Class 2 TST TLD PD TC +VIN V SD IOUT TC Unless otherwise specified, VIN=5.0V, R1=1.62K, VSHUTDOWN=0V and IOUT=10mA. See Figure 2, typical application circuit. Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only. Industrial grade devices shall be tested to subgroups 1 and 4 unless otherwise requested. 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 TC=+125°C Subgroup 3,6 TA=-55°C Output current limit is dependent upon the values of VIN and VOUT. See Figure 1 and typical performance curves. Minimum VIN at -55°C and I OUT=1.0A is 4.0V due to current limit circuitry. Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle. Pre and post irradiation limits, up to 300Krad TID, are identical unless otherwise specified. Reference DSCC SMD 5962F09216 for electrical specification for devices purchased as such. NOTES: Group A Subgroup 2,3 2,3 1,2,3 2,3 2,3 2,3 2,3 2,3 2,3 2,3 2,3 5,6 4,5,6 4,5,6 4,5,6 10mA ≤ I OUT ≤ 1.0A 10mA ≤ IOUT ≤ 1.0A R1=187 Ω VFB=1.265V 10mA ≤ IOUT ≤ 1.0A VIN=7.5V Not Including I OUT IOUT=10mA 2.9V ≤ VIN ≤ 7.5V R1=187 Ω 10mA ≤ IOUT ≤ 1.0A Delta FB=1% I OUT=1.0A 2.9V ≤ VIN ≤ 7.5V R1=187 Ω VIN=7.5V VIN=4.4V VOUT=3.3V VOUT ≤ 0.2V (OFF) VOUT=Nominal (ON) Difference between voltage threshold of V SDI (ON) and V SDI (OFF) f=1KHz to 10KHz 10mA ≤ IOUT ≤ 1.0A 1.0V=VIN-VOUT IOUT=450mA IOUT=450mA Referred to Feedback Pin Junction to Case @ 125°C Output Device Typ. 1.265 ±0.01 ±0.06 0.22 0.26 1.75 1.75 1.3 1.3 0.02 0.03 6.9 Test Conditions Max. 7.5 7.5 1.305 1.305 1.305 1.310 5.0 ±0.50 ±0.50 ±0.80 ±0.80 0.70 0.70 6.8 2.0 2.2 1.6 1.6 0.2 0.2 7.5 Min. 2.9 2.9 1.225 1.225 1.225 1.225 1.5 1.5 1.3 1.0 1.0 Min. 2.9 1.202 1.202 1.202 1.5 1.3 1.0 Max. 7.5 1.328 1.328 1.328 5.0 ±0.60 ±1.0 0.75 6.7 2.2 1.6 0.2 7.8 Typ. 1.265 0.01 0.06 0.22 1.75 1.3 0.02 6.9 V V V V V V μA mA mA OUT %VOUT %VOUT %VOUT V V mA mA V A A V V V V dB dB degrees dB μV RMS °C/W MSK5800K/H MSK5800 Parameter ELECTRICAL SPECIFICATIONS Units Post 100K RAD(Si) Post 300K RAD(Si) 8548-68 Rev. K 6/14

VIN A,B,C - These pins provide power to all internal circuitry including bias, start-up, thermal limit and overcurrent latch. Input voltage range is 2.9V to 7.5V. All three pins must be connected for proper operation. GND1 - Internally connected to input ground, these pins should be connected externally by the user to the circuit ground and the GND2 pins. LATCH - The MSK5800RH LATCH pin is used for both current limit and thermal limit. A capacitor between the LATCH pin and ground sets a time out delay in the event of an over current or short circuit condition. The capacitor is charged to approximately 1.6V from a 7.2μA (nominal) current source. Exceeding the ther- mal limt charges the latch capacitor from a larger current source for a near instant shutdown. Once the latch capacitor is charged the device latches off until the latch is reset. Momentarily pull the LATCH pin low, toggle the shutdown pin high then low or cycle the power to reset the latch. Toggling the shutdown pin or cy- cling the power both disable the device during the reset operation (see SHUTDOWN pin description). Pulling the LATCH pin low immediately enables the device for as long as the LATCH pin is held low plus the time delay to re-charge the latch capacitor whether or not the fault has been corrected. Disable the latch feature by tying the LATCH pin low. With the LATCH pin held low the thermal limit feature is disabled and the current limit feature will force the output voltage to droop but remain active if excessive current is drawn. SHUTDOWN - There are two functions to the SHUTDOWN pin. It may be used to disable the output voltage or to reset the LATCH pin. To activate the shutdown/reset functions the user must ap- ply a voltage greater than 1.3V to the SHUTDOWN pin. The voltage applied to the SHUTDOWN pin can be greater than the input voltage. The output voltage will turn on when the SHUT- DOWN pin is pulled below the threshold voltage. If the SHUT- DOWN pin is not used, it should be connected to ground. FB - The FB pin is the inverting input of the internal error ampli- fier. The non-inverting input is connected to an internal 1.265V reference. This error amplifier controls the drive to the output transistor to force the FB pin to 1.265V. An external resistor divider is connected to the output, FB pin and ground to set the output voltage. GND2 - Internally connected to output ground, these pins should be connected externally by the user to the circuit ground and the GND1 pins. VOUT A,B,C - These are the output pins for the device. All three pins must be connected for proper operation. The MSK5800RH current limit function is directly affected by the input and output voltages. Figure 1 illustrates the relation- ship between VIN and ICL for three output voltages. The MSK5800RH sinks increased current during startup to bring up the output voltage. Reference the "Saturated Drive Current vs. Input Voltage" graph in the typical performance curves of this data sheet and the "Understanding Startup Surge Current With MS Kennedy's RH1573 Based Rad Hard LDO Regulators" appli- cation note in the application notes section of the MS Kennedy Web site for more information. http://www.mskennedy.com/ POWER SUPPLY BYPASSING To maximize transient response and minimize power supply transients it is recommended that a 33μF minimum tantalum ca- pacitor is connected between VIN and ground. A 0.1μF ceramic capacitor should also be used for high frequency bypassing. START UP CURRENT FIGURE 1 OVERCURRENT LATCH-OFF/LATCH PIN CAPACITOR SELECTION As previously mentioned, the LATCH pin provides over cur- rent/output short circuit protection with a timed latch-off circuit. Reference the LATCH pin description note. The latch off time out is determined with an external capacitor connected from the LATCH pin to ground. The time-out period is equal to the time it takes to charge this external capacitor from 0V to 1.6V. The latch charg- ing current is provided by an internal current source. This current is a function of input voltage and temperature (see latch charging current curve). For instance, at 25°C, the latch charging current is 7.2μA at VIN=3V and 8μA at VIN=7V. In the latch-off mode, some additional current will be drawn from the input. This additional latching current is also a function of input voltage and temperature (see latching current curves). PIN FUNCTIONS OUTPUT CAPACITOR SELECTION Low ESR output capacitors are required to maintain regulation and stability. Four CWR29FB227 (AVX PN TAZH227K010L) tantalum capacitors in parallel with ceramic decoupling capacitors (0.1μF typical) provides sufficient gain and phase margin for most applications. The maximum ESR specification for the CWR29FB227 capacitor is 180mΩ at 100kHz and is sufficient for many applications. MSK has found through full WCCA on the MSK5820RH-1.5 that screening for a maximum ESR of 57m Ω ensures EOL stability criteria to be met for many applications with the most stringent requirements. Analysis of the final design is recommended to ensure stability requirements are met. 8548-68 Rev. K 6/14

APPLICATION NOTES CONT. HEAT SINK SELECTION To select a heat sink for the MSK5800RH, 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 Power Dissipation=(VIN-VOUT) x IOUT Next, the user must select a maximum junction tempera- ture. The absolute maximum allowable junction tempera- ture is 150°C. The equation may now be rearranged to solve for the required heat sink to ambient thermal resis- tance (R θSA). Example: An MSK5800RH is connected for VIN=+5V and VOUT=+3.3V. IOUT is a continuous 1A DC level. The am- bient temperature is +25°C. The maximum desired junc- tion temperature is +125°C. R θJC=7.5°C/W and RθCS=0.15°C/W for most thermal greases Power Dissipation=(5V-3.3V) x (1A) =1.7Watts Solve for RθSA: 125°C - 25°C 1.7W = 51.2°C/W In this example, a heat sink with a thermal resistance of no more than 51°C/W must be used to maintain a junction temperature of no more than 125°C. VOUT=1.265(1+R1/R2) As noted in the above typical applications circuit, the for- mula for output voltage selection is A good starting point for this output voltage selection is to set R2=1K. By rearranging the formula it is simple to calculate the final R1 value. Table 1 below lists some of the most probable resistor combinations based on industry standard usage. R21+VOUT=1.265 VOUT 1.265 -1R1=R2 1.5 1.8 2.0 2.5 2.8 3.3 4.0 5.0 187 422 576 976 1.21K 1.62K 2.15K 2.94K RθSA= -7.5°C/W - 0.15°C/W OUTPUT VOLTAGE (V) THERMAL LIMITING TABLE 1 (ΩΩΩΩΩ) R1 (nearest 1%) (ΩΩΩΩΩ) Radiation performance curves for TID testing have been generated for all radiation testing performed by MS Kennedy. These curves show performance trends throughout the TID test process and can be located in the MSK5810RH radia- tion test report. The complete radiation test report is avail- able in the RAD HARD PRODUCTS section on the MSK website. TOTAL DOSE RADIATION TEST PERFORMANCE TYPICAL APPLICATIONS CIRCUIT OUTPUT VOLTAGE SELECTION Reference the MSK5826RH RAD REPORT for Low Dose Rate and Neutron results. The MSK5800RH control circuitry has a thermal shut- down temperature of approximately 150°C. This thermal shutdown can be used as a protection feature, but for con- tinuous operation, the junction temperature of the pass tran- sistor must be maintained below 150°C. Proper heat sink selection is essential to maintain these conditions. Exceed- ing the thermal limit activates the latch feature of the MSK5800RH. See LATCH pin description for instructions to reset the latch or disable the latch feature. 8548-68 Rev. K 6/14

TYPICAL PERFORMANCE CURVES 5 8548-68 Rev. K 6/14

TYPICAL PERFORMANCE CURVES CONT'D 6 8548-68 Rev. K 6/14

TYPICAL PERFORMANCE CURVES GAIN AND PHASE RESPONSE The gain and phase response curves are for the MSK typical application circuit and are representative of typical device performance, but are for reference only. The performance should be analyzed for each application to insure individual program requirements are met. External factors such as temperature, input and output voltages, capacitors, etc. all can be major contributors. Please consult factory for additional details. 8548-68 Rev. K 6/14

TYPICAL PERFORMANCE CURVES CONT'D GAIN AND PHASE RESPONSE The gain and phase response curves are for the MSK typical application circuit and are representative of typical device performance, but are for reference only. The performance should be analyzed for each application to insure individual program requirements are met. External factors such as temperature, input and output voltages, capacitors, etc. all can be major contributors. Please consult factory for additional details. 8548-68 Rev. K 6/14

ORDERING INFORMATION

MIL-PRF-38534 CLASS KMSK5800KRH DSCC SMD 5962F09216 ESD TRIANGLE INDICATES PIN 1 WEIGHT=3.3 GRAMS TYPICAL ALL DIMENSIONS ARE SPECIFIED IN INCHES 8548-68 Rev. K 6/14

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. Phone (315) 701-6751 FAX (315) 701-6752 www.mskennedy.com

REVISION HISTORY

10 8548-68 Rev. K 6/14