MSK5920-5.0KRHGW - M.S. Kennedy Corp.

TYPICAL APPLICATIONS

4707 Dey Road Liverpool, N.Y. 13088 (315) 701-6751

MIL-PRF-38534 CERTIFIED FACILITY

5920RH

SERIES

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

POSITIVE LINEAR REGULATOR

EQUIVALENT SCHEMATIC

TYPICAL APPLICATIONS

DESCRIPTION:

The MSK 5920RH is a rad hard fixed linear regulator capable of delivering 5.0 amps of output current. Typical

dropout is only 0.30 volts with a 3 amp load. An external shutdown function is ideal for power supply sequencing.

This device also has internal latching overload protection. The MSK 5920RH is radiation hard and specifically de-

signed for space/satellite applications. The device is packaged in a hermetically sealed space efficient 5 pin SIP that

is electrically isolated from the internal circuitry allowing for direct heat sinking.

PIN-OUT INFORMATION

VIN

GND

VOUT

SHUTDOWN

N/C

Total Dose Hardened to 100 Krads(Si) (Method 1019.7 Condition A)

Ultra Low Dropout for Reduced Power Consumption

External Shutdown Function

Latching Overload Protection

Available in 1.5V,1.8V,1.9V,2.5V,2.8V,3.3V and 5.0V Output Voltages

Alternate Output Voltages Available

Output Current Limit

Available in 4 Lead Form Options: Straight, Up, Down and Gull Wing

Replaces IR OMR9601 and IRUH33PXXXB/IRUH50PXXXB

Available as SMD 5962R05220

RAD Certified by DSCC

18548-12 Rev. Q 12/11

CASE=ISOLATED

Storage Temperature Range

Lead Temperature Range

(10 Seconds)

Power Dissipation

Junction Temperature

ABSOLUTE MAXIMUM RATINGS

+10V

-55°C to +125°C

-40°C to +85°C

Supply Voltage

Output Current

Case Operating Temperature Range

MSK5920K/H RH

MSK5920RH

-65°C to +150°C

300°C

See SOA Curve

150°C

TST

TLD

+VIN

IOUT

Unless otherwise specified, VIN=VOUT+1V, VSHUTDOWN=0V and IOUT=10mA. See figure 2 for typical test 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" and "K" suffix) shall be 100% tested to subgroups 1,2,3 and 4.

Subgroup 5 and 6 testing available upon request.

Subgroup 1,4 TC=+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.

Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle.

VIN shall be as specified or VIN min., whichever is greater.

Not applicable to versions where VIN = VIN Min.

Pre and post irradiation limits at 25°C, up to 100Krad TID, are identical unless otherwise specified.

Reference DSCC SMD 5962R05220 for electrical specifications for devices purchased as such.

NOTES:

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ELECTRICAL SPECIFICATIONS

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PART NUMBER

MSK5920-1.5

MSK5920-1.8

MSK5920-1.9

MSK5920-2.5

MSK5920-2.8

MSK5920-3.3

MSK5920-5.0

OUTPUT VOLTAGE

+1.5V

+1.8V

+1.9V

+2.5V

+2.8V

+3.3V

+5.0V

8548-12 Rev. Q 12/11

APPLICATION NOTES

PIN FUNCTIONS

VIN - This pin provides power to all internal circuitry in-

cluding bias, start-up, thermal limit and overcurrent latch.

Input voltage range is 2.9V to 6.5V.

GND - Internally connected to ground, this pin should be

connected externally by the user to the circuit ground.

SHUTDOWN - There are two functions to the SHUTDOWN

pin. It may be used to disable the output voltage or to

reset a current latch condition. To activate the shutdown/

reset functions the user must apply a voltage greater than

1.6V to the SHUTDOWN pin. The output voltage will turn

on when the SHUTDOWN pin is pulled below the thresh-

old voltage. If the SHUTDOWN pin is not used, it should

be connected to ground. It should be noted that with the

shutdown pin tied to ground, a current latch condition

can only be reset by cycling power off, then on.

VOUT - This is the output pin for the device.

INPUT POWER SUPPLY BYPASSING

FIGURE 1

Overcurrent protection is provided by the MSK 5920RH

series through the use of a timed latch off circuit. The

internal latch timeout is triggered by an overcurrent con-

dition. To allow for start up surge currents, the timeout is

approximately 5.5mS at 25°C. If the overcurrent condi-

tion remains at the end of the timeout cycle, the regulator

will latch off until the latch is reset. Reset the latch by

pulling the shutdown pin high or cycling VIN off then back

on. A thermal limit condition will trigger the latch with no

time out delay.

OVERCURRENT LATCH

To maximize transient response and minimize power sup-

ply transients it is recommended that a 100μF tantalum

capacitor is connected between VIN and ground. A 0.1μF

ceramic capacitor should also be used for high frequency

bypassing.

CURRENT LIMIT AND SOA

The MSK 5920RH current limit function is directly af-

fected by the input and output voltages. Figure 1 illus-

trates the relationship between VIN and ICL for various

output voltages. It is very important for the user to con-

sult the SOA curve when using input voltages which re-

sult in current limit conditions beyond 4.5 Amps. When

using input voltages which result in current limit above

4.5 Amps, the user must maintain output current within

the SOA curve to avoid damage to the device. Note that 5

Amp maximum is due to current carrying capability of the

internal wirebonds.

REPLACING THE OMR9601/IRUH33P253AIM

When the MSK 5920-2.5RH is used as a replacement

for the IR OMR9601 or IRUH33P253B, the user should

recognize that the MSK 5920-2.5RH does not contain in-

ternal tantalum capacitors on the input and output.

OUTPUT CAPACITOR SELECTION

Low ESR output capacitors are required to maintain regu-

lation and stability. Four CWR29FB227 (AVX PN

TAZH227K010L) tantalum capacitors in parallel with ce-

ramic decoupling capacitors (0.1μF typical) provides suf-

ficient gain and phase margin for most applications. The

maximum ESR specification for the CWR29FB227 capaci-

tor is 180mΩ at 100kHz and is sufficient for many appli-

cations. MSK has found through full WCCA that screen-

ing for a maximum ESR of 57mΩ ensures EOL stability

criteria to be met for many applications with the most

stringent requirements. The typical ESR of the

TAZH227K010L from AVX is 49mΩ . Analysis of the fi-

nal design is recommended to ensure stability require-

ments are met.

The MSK 5920RH sinks increased current during startup

to bring up the output voltage. Reference the "Saturated

Drive Current vs. Input Voltage" graph in the typical per-

formance curves of this data sheet and the "Understand-

ing Startup Surge Current With MS Kennedy's RH1573

Based Rad Hard LDO Regulators" application note in the

application notes section of the MS Kennedy Web site for

more information.

http://www.mskennedy.com/

START UP CURRENT

8548-12 Rev. Q 12/11

APPLICATION NOTES CONT.

To select a heat sink for the MSK 5920RH, the follow-

ing 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 tem-

perature. The absolute maximum allowable junction tem-

perature is 150°C. The equation may now be rearranged

to solve for the required heat sink to ambient thermal

resistance (RθSA).

Example:

An MSK 5920-2.5RH is connected for VIN=+3.3V and

VOUT=+2.5V. IOUT is a continuous 3A DC level. The am-

bient temperature is +25°C. The maximum desired junc-

tion temperature is +125°C.

RθJC=4.0°C/W and RθCS=0.15°C/W for most thermal

greases

Power Dissipation=(3.3V-2.5V) x (3A)

=2.4 Watts

Solve for RθSA:

125°C - 25°C

2.4W

= 36.5°C/W

In this example, a heat sink with a thermal resistance

of no more than 36.5°C/W must be used to maintain a

junction temperature of no more than 125°C.

The MSK 5920RH control circuitry has a thermal shut-

down temperature of approximately 150°C. This ther-

mal shutdown can be used as a protection feature, but

for continuous operation, the junction temperature of the

pass transistor must be maintained below 150°C. Proper

heat sink selection is essential to maintain these condi-

tions. Exceeding the thermal limit activates the latch fea-

ture of the MSK 5920RH. Toggle the shutdown pin high

them low or cycle power to reset the latch. See shut-

down pin description and overcurrent latch description

for more information.

TYPICAL APPLICATIONS CIRCUIT

RθSA= -4.0°C/W - 0.15°C/W

FIGURE 2

THERMAL LIMITING

HEAT SINK SELECTION

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 MSK 5920RH radiation test report. The complete

radiation test report is available in the RAD HARD PROD-

UCTS section on the MSK website.

TOTAL DOSE RADIATION TEST

PERFORMANCE

http://www.mskennedy.com/store.asp?pid=9951&catid=19680

8548-12 Rev. Q 12/11

TYPICAL PERFORMANCE CURVES

58548-12 Rev. Q 12/11

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.

8548-12 Rev. Q 12/11

MECHANICAL SPECIFICATIONS

ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.

ESD Triangle indicates pin 1.

ORDERING INFORMATION

LEAD CONFIGURATIONS

GW= GULL WING

RADIATION HARDENED

SCREENING

BLANK= INDUSTRIAL; H=MIL-PRF-38534 CLASS H;

K=MIL-PRF-38534 CLASS K

OUTPUT VOLTAGE

1.5=+1.5V; 1.8=+1.8V; 1.9=+1.9V; 2.5=+2.5V;

2.8=+2.8V; 3.3=+3.3V; 5.0=+5.0V

GENERAL PART NUMBER

MSK5920-3.3 K RH GW

The above example is a +3.3V, Class K regulator with gull wing leads.

WEIGHT=7.7 GRAMS TYPICAL

NOTE: See DSCC SMD 5962R05220 for DSCC part number options.

8548-12 Rev. Q 12/11

MECHANICAL SPECIFICATIONS

ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.

ESD Triangle indicates pin 1.

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.

4707 Dey Road, Liverpool, New York 13088

Phone (315) 701-6751

FAX (315) 701-6752

www.mskennedy.com

ORDERING INFORMATION

LEAD CONFIGURATIONS

S= STRAIGHT; U= BENT UP; D= BENT DOWN

RADIATION HARDENED

SCREENING

BLANK= INDUSTRIAL; H=MIL-PRF-38534 CLASS H;

K=MIL-PRF-38534 CLASS K

OUTPUT VOLTAGE

1.5=+1.5V; 1.8=+1.8V; 1.9=+1.9V; 2.5=+2.5V;

2.8=+2.8V; 3.3=+3.3V; 5.0=+5.0V

GENERAL PART NUMBER

MSK5920-3.3 K RH U

The above example is a +3.3V, Class K regulator with leads bent up.

WEIGHT=7.7 GRAMS TYPICAL

NOTE: See DSCC SMD 5962R05220 for DSCC part number options.

8548-12 Rev. Q 12/11