MSK5984KRHU [ANAREN]
RAD HARD POSITIVE, 2.8A, LDO, SINGLE RESISTOR ADJ VOLTAGE REGULATOR;
| 型号： | MSK5984KRHU |
| 厂家： | 
ANAREN MICROWAVE |
| 描述： | RAD HARD POSITIVE, 2.8A, LDO, SINGLE RESISTOR ADJ VOLTAGE REGULATOR |
| 文件： | 总8页 (文件大小：539K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIL-PRF-38534 AND 38535 CERTIFIED FACILITY
RAD HARD POSITIVE,
2.8A, LDO, SINGLE RESISTOR
ADJ VOLTAGE REGULATOR
5984RH
FEATURES:
• Manufactured using
Space Qualified RH3083 Die
• MIL-PRF-38534 Class K Processing & Screening
• Total Dose Hardened to 100 Krads(Si) (Method 1019.7 Condition A)
• Total Dose Tested to 450 Krad(Si) (Method 1019.7 Condition A)
• Low Dropout to 310mV (VIN - VOUT, with Seperate Control Supply)
• Output Adjustable to Zero Volts
• Internal Short Circuit Current Limit
• Output Voltage is Adjustable with 1 External Resistor
• Output Current Capability to 2.8A
• Internal Thermal Overload Protection
• Outputs may be Paralleled for Higher Current
• Contact MSK for MIL-PRF-38534 Qualification Status
DESCRIPTION:
The MSK5984RH offers low dropout down to 310mV and an output voltage range down to zero volts while offering
radiation tolerance for space applications. This, combined with the low θJC, allows increased output current while providing
exceptional device efficiency. Output voltage is selected by the user through the use of 1 external resistor. Additionally, the
regulator offers internal short circuit current and thermal limiting, which allows circuit protection and eliminates the need for
external components and excessive derating. The MSK5984RH is hermetically sealed in a space efficient 3 pin package
with straight, up and down pin configurations.
EQUIVALENT SCHEMATIC
PIN-OUT INFORMATION
TYPICAL APPLICATIONS
• High Efficiency Linear Regulators
• Constant Voltage/Current Regulators
• Space System Power Supplies
1
2
3
SET
CONTROL
VIN
• Switching Power Supply Post Regulators
CASE=VOUT
1
8548-168 Rev. F 2/18
10
ABSOLUTE MAXIMUM RATINGS
7
VIN
Input Voltage................................................. +18V, -0.3V
PD Power Dissipation.................................. Internally Limited
TJ Junction Temperature............................................ +150°C
TST Storage Temperature Range................... -65°C to +150°C
TLD Lead Temperature Range
(10 Seconds)............................................................300°C
TC Case Operating Temperature
7
No Overload or Short..................................... +23V,-0.3V
VCONTROL Control Pin Voltage................................................. ±28V
7
8
IOUT
ISET
VSET
Output Current......................................................... 3.0A
Set Pin Current ................................................... ±25mA
Set Pin Voltage....................................................... ±10V
7
MSK5984RH.......................................... -40°C to +85°C
MSK5984K/H RH................................. -55°C to +125°C
ESD Rating......................................................... CLASS 2
ELECTRICAL SPECIFICATIONS
MSK 5984K/H RH
MSK 5984RH
Group A
Subgroup
Parameter
Test Conditions
1
11
Units
Min.
Typ.
Max.
Min.
Typ.
Max.
1
2, 3
1
49.5
49
50
50.5
51.5
51
49.5
-
50
50.5
-
uA
uA
VCONTROL = VIN = 3.0V VOUT = 1.0V 5mA ≤ ILOAD ≤ 2.8A
Post Radiation
Set Pin Current
(ISET)
-
-
-
-
49
49
-4.5
-
51
4.5
-
uA
VCONTROL = VIN = 3.0V VOUT = 1.0V
1
-4.5
-6
0
4.5
6
0
mV
mV
mV
nA
Output Offset Voltage
(VOS)
ILOAD = 5mA
2, 3
1, 2, 3
1, 2, 3
-
-
-4
-
4
-4
-
4
VCONTROL = VIN = 3.0V VOUT = 0V 5mA ≤ ILOAD ≤ 2.8A (δVOS)
Load Regulation
Line Regulation
-300
-10
+300
-300
-10
+300
(δISET)
δVIN = 2V TO 24V δVCONTROL = 3V TO 24V
VOUT = 0V
(δVOS)
1, 2, 3
1, 2, 3
-0.05
-10
-
0.05
+10
-0.05
-10
-
0.05
+10
mV/V
nA/V
0.1
0.1
ILOAD = 5mA
(δISET)
1
2, 3
1
-
310
-
700
-
310
-
700
mV
mV
V
VIN Dropout Voltage
VOUT = 1.0V ILOAD = 2.8A VCONTROL = 3.0V
-
800
-
-
-
1.66
1.25
1.25
-
-
-
1.66
1.25
1.25
-
-
1% δVOUT
VIN+ Control Pin
Dropout Voltage
2
VOUT = 1.0V, ILOAD = 2.8A
1
-
-
1.55
1.65
11
100
-
-
-
V
10% δVOUT
1
-
-
1.55
V
Control Pin
Dropout Voltage
VOUT = 1.0V ILOAD = 2.8A VIN = 3.0V
2, 3
-
-
-
11
100
-
V
VIN = 2.0V VOUT = 1.0V
ILOAD = 100mA 1, 2, 3
-
-
5.5
50
3.6
-
-
5.5
50
3.6
-
mA
mA
A
Control Pin Current
VCONTROL = 3.0V ILOAD = 100mA
ILOAD = 2.8A 1, 2, 3
-
1
2, 3
-
2.8
2.8
-
2.8
Current Limit
9
VCONTROL = VIN = 5.0V VOUT = 1.0V
VCONTROL = VIN = 23V
-
-
-
-
-
A
Minimum Load Current
Ripple Rejection
6
-
1
-
1
mA
dB
2
-
-
-
-
85
-
85
-
F = 120Hz δVIN = 0.5Vpp IOUT = 0.1A CSET = 0.1uF
VIN = VCONTROL = 3V, IOUT = 500mA
Output Noise
2
CSET = 0.1uF
-
-
40
-
-
-
40
-
uVRMS
°C/W
10Hz to 100KHz
Thermal Resistance
2
Junction to Case @ 125°C
2.3
2.9
2.3
2.9
NOTES:
1
Output is decoupled to ground using a 220µF tantalum low ESR capacitor in parallel with 3 pieces of 1.0µF and one 0.1µF ceramic capacitor unless otherwise
specified. (See Figure 1)
2
3
4
5
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Logic input levels are verified during logic output voltage test.
Industrial grade devices shall be tested to subgroup 1 unless otherwise requested.
Subgroup
1
2
3
TA = TC = +25°C
TA = TC = +125°C
TA = TC = -55°C
6
7
Minimum load current verified while testing line regulation.
Voltage is measured with respect to VOUT.
8
9
10
11
Set pin is clamped to VOUT with diodes in series with 1KΩ resistors. Current will flow under transient conditions.
Reference current limit typical performance curve for output current capability versus voltage drop.
Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle.
Pre and Post irradiation limits at 25°C, up to 100 Krad(Si) TID, are identical unless otherwise specified.
2
8548-168 Rev. F 2/18
APPLICATION NOTES
OUTPUT VOLTAGE
ADDITIONAL STABILITY
A single resistor (RSET) from the SET pin to ground creates the reference volt-
age for the internal Error Amplifier. The MSK5984RH SET pin supplies a constant
current of 50uA that develops the reference voltage. The output voltage is simply
RSET x 50uA. Since the output is internally driven by a unity-gain amplifier, an
alternative to using RSET is to connect a high quality reference source to the SET
pin. With a minimum load requirement of 1mA on the Output, the Output Voltage
can be adjusted to near 0V. To bring the output voltage to 0V, the load must be
connected to a slightly negative voltage supply to sink the 1mA minimum load
current from a 0V output.
A capacitor placed in parallel with the SET pin resistor to ground, will improve
the output transient response and filter noise in the system. To reduce output noise,
typically 500-1000pF is required. Capacitors up to 1µF can be used, however
consideration must be given to the effect the time constant created will have on
the startup time.
LOAD REGULATION
The MSK5984RH specified load regulation is Kelvin Sensed, therefore the par-
asitic resistance of the system must be considered to design an acceptable load
regulation. The overall load regulation includes the specified MSK5984RH load
regulation plus the parasitic resistance multiplied by the load current as shown in
Figure 3. RSO is the series resistance of all conductors between the MSK5984RH
output and the load. It will directly increase output load regulation error by a voltage
drop of ∆IO x RSO. RSS is the series resistance between the SET pin and the load.
RSS will have little effect on load regulation if the SET pin trace is connected as
close to the load as possible keeping the load return current on a separate trace
as shown. RSR is the series resistance of all of the conductors between the load
and the input power source return. RSR will not effect load regulation if the SET
pin is connected with a Kelvin Sense type connection as shown in Figure 3, but it
will increase the effective dropout voltage by a factor of IO x RSR. Keeping RSO
and RSR as low as possible will ensure minimal voltage drops and wasted power.
FIGURE 1
INPUT CAPACITANCE
Pins 3 is the connection to the collector of the power device of the MSK 5984RH.
Output load current is supplied through these pins. Minimum input capacitance
for these devices is 10uF. Low ESR, ceramic input capacitors are acceptable for
applications without long input leads. For applications with long input leads, the
self inductance of the wires can cause instability. Care must be taken to minimize
the inductance of the input wires. This can be accomplished through the use of
series resistance or higher ESR input capacitors. A minimum of 10uF of low ESR
tantalum bulk capacitance in parallel with low value ceramic decoupling capacitance
is recommended.
CONTROL PIN
The control pin is the bias supply for the control circuitry of the MSK5984RH.
Minimum input capacitance on the control pin is 2.2uF. Approximately 1.7% of
the output current flows into this pin. For proper regulation, the control pin volt-
age must be 1.6V greater than the output voltage. (See Control Dropout Voltage
Specification).
FIGURE 3
PARALLELING DEVICES
When currents greater than 2.8Aare needed, the MSK5984RH's may be paral-
leled to multiply the current capacity. As shown in Figure 4, the VIN and SET pins
must be tied together. The VOUT pins are connected to the load with consider-
ation to the conductor resistance. The conductor resistance of each MSK5984RH
VOUT connection to the load, must be equal to create equal load sharing. As little
as 10mΩ ballast resistance typically ensures better than 80% equal sharing of
load current at full load. Additional consideration must be given to the effect the
additional VOUT conductor resistance has on load regulation; see paragraph titled
"Load Regulation".
OUTPUT CAPACITANCE
For stability purposes, the MSK5984RH requires a minimum output capacitor of
10µF with an ESR of 0.5Ω or less. Tantalum or ceramic capacitors are recommend-
ed. A larger capacitance value will improve transient response for increased load
current changes. Consideration must also be given to temperature characteristics
of the capacitors used.
LOW DROPOUT OPERATION
Using separate VIN and CONTROLpower supplies allows for lower dropout and
improved efficiency. Figure 2 shows the MSK5984RH output transistor collector is
connected to the VIN pin. The regulator control circuitry is powered by the CON-
TROL input. The dropout of the regulator is determined by the saturation voltage
of the output transistor, typical 300mV at 2.8AILOAD. The CONTROL supply must
supply the base drive current for the output transistor. The CONTROL current
minus the 50µA SET current is supplied to the load. See the Typical Performance
Characteristics curves for expected VIN dropout voltage, CONTROL pin dropout
voltage and current requirements under various conditions. With separate supplies
for VIN and CONTROL, power dissipation is reduced and efficiency improves.
FIGURE 4
FIGURE 2
3
8548-168 Rev. F 2/18
APPLICATION NOTES CONT'D
IMPROVING INITIAL ACCURACY AND REDUCING
TEMPERATURE DRIFT
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.
The initial output accuracy of the MSK5984RH due to SET pin
current tolerance and set point resistor accuracy can be reduced to
0.2% using the MSK109RH radiation hardened precision reference.
Minimal drift of the MSK109RH from temperature extremes and ir-
radiation ensure very tight regulation. The circuit can be configured
to use the 2.5V reference to directly set the output at 2.5V or with a
slight variation it can provide any output within the operating range
of the MSK5984RH down to 0V output. Select RS to maintain be-
tween 1mAand 10mAof current through the reference; see Figure 5
below. RS may be tied to VIN or another power source. The optional
trim resistor can be used to further trim out initial output and system
error. Reference the MSK109RH data sheet for application circuits
that provide stable output voltages across the full operating range
of the MSK5984RH including down to 0V output and the operating
characteristics of the MSK109RH.
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
TC = Case Temperature
TA = Ambient Temperature
TS = Heat Sink Temperature
EXAMPLE:
This example demonstrates the thermal calculations for the regulator
operating at 1.5A output current.
Conditions for MSK5984RH:
VCONTROL=VIN = +3.0V; IOUT = +1.5A VOUT=+1.0V
1.) Assume 45° heat spreading model.
2.) Find regulator power dissipation:
PD = (VIN - VOUT)(IOUT)
PD = (3-1)(1.50)
= 3.0W
3.) For conservative design, set TJ = +125°C Max.
4.) For this example, worst case TA = +90°C.
5.) RθJC = 2.9°C/W from the Electrical Specification Table.
6.) RθCS= 0.15°C/W for most thermal greases.
7.) Rearrange governing equation to solve for RθSA:
FIGURE 5
ADDING SHUTDOWN
RθSA= (TJ - TA)/PD - (RθJC) - (RθCS)
= (125°C - 90°C)/3.0W - 2.9°C/W - 0.15°C/W
= 8.6°C/W
The MSK5984RH can be easily shutdown by either reducing
RSET to 0Ω or connecting a transistor from the SET pin to ground.
By connecting two transistors, as shown in Figure 6, a low current
voltage source is all that is required to take the SET pin to ground as
well as pull the output voltage to ground. Q2 pulls the output voltage
to ground when no load is present and only needs to sink 10mA.
In this case the result is 8.6°C/W. Therefore, a heat sink with a thermal
resistance of no more than 8.6°C/W must be used in this application
to maintain regulator circuit junction temperature under 125°C.
TOTAL DOSE RADIATION TEST PERFORMANCE
Radiation performance curves for TID testing have been generated
for all radiation testing performed by MSK. These curves show per-
formance trends throughout the TID test process and can be located
in the MSK5984RH radiation test report. The complete radiation test
report will be available in the RAD HARD PRODUCTS section on
the Anaren.com\MSK website.
ADDITIONAL APPLICATION INFORMATION
For additional applications information, please reference Linear
Technology Corporation's® LT3083 and RH3083 data sheets.
FIGURE 6
4
8548-168 Rev. F 2/18
TYPICAL PERFORMANCE CURVES
5
8548-168 Rev. F 2/18
TYPICAL PERFORMANCE CURVES CONT'D
6
8548-168 Rev. F 2/18
MECHANICAL SPECIFICATIONS
ꢀ
ꢀ
ESD TRIANGLE INDICATES PIN 1
WEIGHT=3.2 GRAMS TYPICAL
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
MSK5984 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
GENERAL PART NUMBER
The above example is an adjustable Class K regulator with leads bent up.
7
8548-168 Rev. F 2/18
REVISION HISTORY
REV
-
STATUS
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
Released
DATE
01/14
01/14
03/14
08/14
04/16
12/17
02/18
DESCRIPTION
Initial Release
A
Add clarifications for block diagram, electrical specifications, max ratings and applications section.
B
Add clarifications.
C
Update electrical specifications.
Add class H under ordering information.
Add ESD Rating
D
E
F
Update radiation status
ANAREN, MSK Products
www.anaren.com/msk
The information contained herein is believed to be accurate at the time of printing. Anaren, MSK products 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.
Contact Anaren, MSK Products for MIL-PRF-38534 Class H, Class K qualification status.
8
8548-168 Rev. F 2/18
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