MIL-PRF-38534 & 38535 CERTIFIED FACILITY
RAD HARD
ULTRA LOW DROPOUT
POSITIVE LINEAR REGULATOR
5822RH
SERIES
FEATURES:
Manufactured using
Space Qualified RH1573 Die
New "Harder" Version of MSK5922RH
Total Dose Hardened to 300 Krads(Si) (Method 1019.7 Condition A)
Low Dropout for Reduced Power Consumption
Latching Overload Protection
Available in 1.5V,1.9V,2.5V,2.8V,3.3V and 5.0V Output Voltages
Alternate Output Voltages Available
Output Current Limit
Available in 3 Lead Form Options: Straight, Up and Down
Seperate Bias/Vin Pins for Improved Efficiency
Available to DSCC SMD 5962F09236
ELDRS Tested to 100 Krads(Si) (Method 1019.7 Condition D)
Neutron Tested to 1.0x10¹² n/cm² (Method 1017.2)
DESCRIPTION:
The MSK5822RH is a rad hard fixed linear regulator capable of delivering 5.0 amps of output current. Typical dropout
is only 0.35 volts with a 2.5 amp load. Separated power and bias simplifies supply tracking. This device also has latching
overload protection. The MSK5822RH is radiation hardened and specifically designed 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.
EQUIVALENT SCHEMATIC
TYPICAL
APPLICATIONS
TYPICAL APPLICATIONS
PIN-OUT INFORMATION
Satellite System Power Supplies
Switching Power Supply Post Regulators
Constant Voltage/Current Regulators
Microprocessor Power Supplies
1
1 VIN
2 VBIAS
3 VOUT
4 GND
5 LATCH
CASE=ISOLATED
8548-61 Rev. K 8/15
ABSOLUTE MAXIMUM RATINGS
VBIAS
VIN
IOUT
TC
8
Bias Supply Voltage
+10V
Supply Voltage
+10V
Output Current 7
5A
Case Operating Temperature Range
MSK5822K/H RH
-55°C to +125°C
MSK5822RH
-40°C to +85°C
TST
TLD
PD
TC
Storage Temperature Range
Lead Temperature Range
(10 Seconds)
Power Dissipation
Junction Temperature
13
-65°C to +150°C
300°C
See SOA Curve
150°C
ELECTRICAL SPECIFICATIONS
NOTES:
PART NUMBER
OUTPUT VOLTAGE
MSK5822-1.5
+1.5V
MSK5822-1.9
+1.9V
MSK5822-2.5
+2.5V
MSK5822-2.8
+2.8V
MSK5822-3.3
+3.3V
MSK5822-5.0
+5.0V
1 Unless otherwise specified, VIN=VOUT+1V, VBIAS=5V and IOUT=10mA. See figure 2 for typical test circuit.
2 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.
3 Military grade devices ("H" and "K" suffix) shall be 100% tested to subgroups 1,2,3 and 4.
4 Subgroup 5 and 6 testing available upon request.
5 Subgroup 1,4 TC=+25°C
6 Subgroup 2,5 TC=+125°C
Subgroup 3,6 TA=-55°C
7 Output current limit is dependent upon the values of VIN and VOUT. See Figure 1 and typical performance curves.
8 Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle.
9 VIN shall be as specified or VIN min., whichever is greater.
10 Saturation voltage varies with load. See typical performance curves.
11 Pre and post irradiation limits, at +25°C, up to 300Krad TID, are identical unless otherwise specified.
12 Reference DSCC SMD 5962F09236 for electrical specifications for devices purchased as such.
13 Internal solder reflow temperature is 180°C, do not exceed.
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APPLICATION NOTES
PIN FUNCTIONS
START UP OPTIONS
VIN - This pin provides the input power connection to the
MSK5822RH. This is the supply that will be regulated to the
output. Input voltage range is VOUT + VDROPOUT to 6.5V.
The MSK5822RH starts up and begins regulating immediately when VBIAS and VIN are applied simultaneously.
Applying VBIAS before VIN starts the MSK5822RH up in a
disabled or latched state. When starting in a latched state the
device output can be enabled by pulling the latch pin low to
drain the latch capacitor. Hold the latch pin low and release
after VIN comes up to ensure automatic startup when applying
VBIAS before VIN. The basic circuit below can be adapted to
a variety of applications for automatic start up when VBIAS
rises before VIN.
VBIAS - This pin provides power to all internal circuitry including bias, start-up, thermal limit and overcurrent latch. VBIAS
voltage range is 2.9V to 6.5V. VBIAS should be kept greater
than or equal to VIN.
LATCH - The MSK5822RH 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 thermal limit 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, or cycle
the power to reset the latch. Cycling the bias power disables
the device during the reset operation. 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.
START UP CURRENT
The MSK5822RH 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" application note in the application notes
section of the MSK Web site for more information.
GND - Internally connected to ground, this pin should be
connected externally by the user to the circuit ground.
VOUT - This is the output pin for the device.
http://www.anaren.com/msk
OVERCURRENT LATCH-OFF/LATCH PIN CAPACITOR
SELECTION
INPUT POWER SUPPLY BYPASSING
To maximize transient response and minimize power supply
transients it is recommended that two 47µF tantalum capacitors are connected between VIN and ground. A 0.1µF ceramic
capacitor should also be used for high frequency bypassing.
See typical application circuit.
As previously mentioned, the LATCH pin provides over
current/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 charging current is provided by an internal
current source. This current is a function of bias voltage and
temperature (see latch charging current curve). For instance,
at 25°C, the latch charging current is 7.2µA at VBIAS=3V and
8µA at VBIAS=6.5V.
In the latch-off mode, some additional current will be drawn
from the bias supply. This additional latching current is also
a function of bias voltage and temperature (see typical performance curves).
The MSK5822RH current limit function is directly affected by
the input and output voltages. Custom current limit is available;
contact the factory for more information.
OUTPUT CAPACITOR SELECTION
Output capacitors are required to maintain regulation and
stability. Between 440 and 100µF surface mount, low ESR,
tantalum capacitor from the output to ground should suffice
under most conditions. See typical application circuit for recommended capacitance. Ceramic output capacitors (0.1µF
typical) should be placed directly across the load power connections as close to the load as possible. If the user finds that
tighter voltage regulation is needed during output transients,
more capacitance may be added. If more capacitance is
added to the output, the bandwidth may suffer.
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8548-61 Rev. K 8/15
APPLICATION NOTES CONT'D
THERMAL LIMITING
TYPICAL APPLICATIONS CIRCUIT
The MSK5822RH control circuitry has a thermal shutdown
temperature of approximately 150°C. This thermal 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 conditions. Exceeding the thermal limit
activates the latch feature of the MSK5822RH. Momentarily
pull the latch pin low or cycle the power to reset the latch.
HEAT SINK SELECTION
To select a heat sink for the MSK5822RH, the following
formula for convective heat flow may be used.
Governing Equation:
TJ = PD X (RθJC + RθCS + RθSA) + TA
Where
TJ
PD
RθJC
RθCS
RθSA
TA
=
=
=
=
=
=
FIGURE 2
Junction Temperature
Total Power Dissipation
Junction to Case Thermal Resistance
Case to Heat Sink Thermal Resistance
Heat Sink to Ambient Thermal Resistance
Ambient Temperature
TOTAL DOSE RADIATION TEST
PERFORMANCE
Radiation performance curves for TID testing have been
generated for all radiation testing performed by MSK. These
curves show performance trends throughout the TID test
process and are located in the MSK5822RH radiation test
report. The complete radiation test report will be available in
the RAD HARD PRODUCTS section on the MSK website.
Power Dissipation=(VIN-VOUT) x IOUT
Next, the user must select a maximum junction temperature. The absolute maximum allowable junction temperature
is 150°C. The equation may now be rearranged to solve for
the required heat sink to ambient thermal resistance (RθSA).
http://www.mskennedy.com/store.asp?pid=9951&catid=19680
Example:
Reference the MSK5826RH RAD REPORT for ELDRS and
Neutron results.
An MSK5822-2.5RH is connected for VIN=+3.3V and
VOUT=+2.5V. IOUT is a continuous 3A DC level. The ambient temperature is +25°C. The maximum desired junction
temperature is +125°C.
RθJC=3.0°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:
RθSA=
125°C - 25°C
- 3.0°C/W - 0.15°C/W
2.4W
= 38.5°C/W
In this example, a heat sink with a thermal resistance of
no more than 38°C/W must be used to maintain a junction
temperature of no more than 125°C.
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8548-61 Rev. K 8/15
TYPICAL PERFORMANCE CURVES
5
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TYPICAL PERFORMANCE CURVES
GAIN AND PHASE RESPONSE
The gain and phase response curves are for the MSK typical application circuit at 25°C 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.
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MECHANICAL SPECIFICATIONS
ESD TRIANGLE INDICATES PIN 1
WEIGHT=7.7 GRAMS TYPICAL
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
MSK5822-3.3 K RH GW
LEAD CONFIGURATIONS
G= 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; 1.9=+1.9V; 2.5=+2.5V; 2.8=+2.8V;
3.3=+3.3V; 5.0=+5.0V
GENERAL PART NUMBER
The above example is a +3.3V, Class K regulator with leads bent up.
NOTE: See DSCC SMD 5962F09236 for DSCC part number options.
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8548-61 Rev. K 8/15
MECHANICAL SPECIFICATIONS
ESD TRIANGLE INDICATES PIN 1
WEIGHT=7.7 GRAMS TYPICAL
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
MSK5822-3.3 K RH U
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; 1.9=+1.9V; 2.5=+2.5V; 2.8=+2.8V;
3.3=+3.3V; 5.0=+5.0V
GENERAL PART NUMBER
The above example is a +3.3V, Class K regulator with leads bent up.
NOTE: See DSCC SMD 5962F09236 for DSCC part number options.
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8548-61 Rev. K 8/15
REVISION HISTORY
MSK
www.anaren.com/msk
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.
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