MSK5983RH [ANAREN]
RAD HARD POSITIVE, 2.25A, LDO, SINGLE RESISTOR ADJ VOLTAGE REGULATOR;
| 型号： | MSK5983RH |
| 厂家： | 
ANAREN MICROWAVE |
| 描述： | RAD HARD POSITIVE, 2.25A, LDO, SINGLE RESISTOR ADJ VOLTAGE REGULATOR |
| 文件： | 总9页 (文件大小：610K) |
| 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,
2.25A, LDO, SINGLE RESISTOR
ADJ VOLTAGE REGULATOR
5983RH
FEATURES:
Manufactured using
Space Qualified RH3083 Die
MIL-PRF-38534 Class K Processing & Screening
Total Dose Hardened to TBD Krads(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 2.25A
Internal Thermal Overload Protection
Outputs may be Paralleled for Higher Current
Available in Straight or Gull Wing Lead Form
Contact MSK for MIL-PRF-38534 Qualification and Radiation Status
DESCRIPTION:
The MSK5983RH 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 MSK5983RH is hermetically sealed in a 16 pin flatpack, and is available
with straight or gull wing lead form.
EQUIVALENT SCHEMATIC
PIN-OUT INFORMATION
TYPICAL APPLICATIONS
High Efficiency Linear Regulators
Constant Voltage/Current Regulators
Space System Power Supplies
Switching Power Supply Post Regulators
Very low Voltage Power Supplies
1 CASE
2 CONTROL
3 VINA
16 SET
15 SENSE
14 VOUTA
13 VOUTB
12 VOUTC
11 VOUTD
10 VOUTE
4 VINB
5 VINC
6 VIND
7 VINE
8 VINF
9
VOUTF
CASE=ISOLATED
ꢀ
1
PRELIMINARY Rev. E 12/17
10
ABSOLUTE MAXIMUM RATINGS
7
+18V,-0.3V
+23V, -0.3V
+/-28V
VIN
Input Voltage
PD
TJ
Power Dissipation
Junction Temperature
Internally Limited
+150°C
-65°C to +150°C
7
No Overload or Short
VCONTROLControl Pin Voltage
TST Storage Temperature Range
TLD Lead Temperature Range
(10 Seconds)
3.0A
+/-25mA
+/-10V
IOUT
ISET
VSET
Output Current
Set Pin Current
Set Pin Voltage
8
7
300°C
TC
Case Operating Temperature
MSK5983RH
MSK5983K/H RH
ESD Rating
-40°C to +85°C
-55°C to +125°C
CLASS 2
ELECTRICAL SPECIFICATIONS
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. Sense pin connected to VOUT unless otherwise specified. (See Figure 1)
Guaranteed by design but not tested. Typical parameters are representative of actual device
performance but are for reference only.
2
3
4
5
Industrial grade devices shall be tested to subgroup 1 unless otherwise specified.
Class H and K devices shall be 100% tested to subgroups 1,2 and 3.
Subgroup 1 TA=TC=+25°C
Subgroup 2 TA=TC=+125°C
Subgroup 3 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 1KΩꢀresistors. Current will flow under transient conditions.
Reference the 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 TBD Krad(Si) TID, are identical unless otherwise specified.
2
PRELIMINARY Rev. E 12/17
APPLICATION NOTES
OUTPUT VOLTAGE
ADDITIONAL STABILITY
A single resistor (RSET) from the SET pin to ground creates the reference volt-
A capacitor placed in parallel with the SET pin resistor to ground, will improve the
age for the internal Error Amplifier. The MSK5983RH SET pin supplies a constant output transient response and filter noise in the system. To reduce output noise,
current of 50uA that develops the reference voltage. The output voltage is simply typically 500-1000pF is required. Capacitors up to 1µF can be used, however
RSET x 50uA. Since the output is internally driven by a unity-gain amplifier, an consideration must be given to the effect the time constant created will have on
alternative to using RSET is to connect a high quality reference source to the SET the startup time.
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
asitic resistance of the system must be considered to design an acceptable load
current from a 0V output.
LOAD REGULATION
The MSK5983RH specified load regulation is Kelvin Sensed, therefore the par-
regulation. The overall load regulation includes the specified MSK5983RH 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 MSK5983RH
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 3-8 are the connection to the collector of the power device of the
MSK5983RH. 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 MSK5983RH. Mini-
mum 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 voltage must be
FIGURE 3
1.6V greater than the output voltage. (See Control Dropout Voltage Specification).
OUTPUT CURRENT/CURRENT LIMIT
OUTPUT CAPACITANCE
Available output current and current limit values have been derived from the
MSK5983RH which assumes a lead length of approximately 0.1 inch. Increased
lead length will decrease current limit due to lead resistance. This is especially
important to note with use of the MSK5983RH, which allows the potential for lead
lengths to exceed 0.1 inch.
For stability purposes, the MSK5983RH 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.
PARALLELING DEVICES
LOW DROPOUT OPERATION
When currents greater than 2.25A are needed, the MSK5983RH's may be
paralleled 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
consideration to the conductor resistance. The conductor resistance of each
MSK5983RH 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".
Using separate VIN and CONTROL power supplies allows for lower dropout and
improved efficiency. Figure 2 shows the MSK5978RH 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 2.25A ILOAD. 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
PRELIMINARY Rev. E 12/17
A
APPLICATION NOTES CONT'D
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.
IMPROVING INITIAL ACCURACY AND
REDUCING TEMPERATURE DRIFT
Governing Equation: TJ = PD x (RθJC + RθCS + RθSA) + TA
The initial output accuracy of the MSK5983RH 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
irradiation 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 MSK5983RH down to 0V output. Select RSto maintain between
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 MSK5983RH including down to 0V output and the operating
characteristics of the MSK109RH.
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 MSK5983RH:
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 = 3.5°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:
RθSA= (TJ - TA)/PD - (RθJC) - (RθCS)
= (125°C - 90°C)/3.0W - 3.5°C/W - 0.15°C/W
= 8.0°C/W
FIGURE 5
ADDING SHUTDOWN
In this case the result is 8.0°C/W. Therefore, a heat sink with a thermal
The MSK5983RH can be easily shutdown by either reducing resistance of no more than 8.0°C/W must be used in this application
RSET to 0Ω or connecting a transistor from the SET pin to ground. to maintain regulator circuit junction temperature under 125°C.
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.
TOTAL DOSE RADIATION TEST
PERFORMANCE
Radiation performance curves for TID testing will be generated for
all radiation testing performed by MS Kennedy. These curves show
performance trends throughout the TID test process and can be lo-
cated in the MSK5983RH radiation test report. The complete radiation
test report will be available in the RAD HARD PRODUCTS section
on the MSK website.
ADDITIONAL APPLICATION INFORMATION
For additional applications information, please reference Linear Tech-
nology Corporation's® LT3083 and RH3083 data sheets.
FIGURE 6
PRELIMINARY Rev. E 12/17
4
TYPICAL PERFORMANCE CURVES
5
PRELIMINARY Rev. E 12/17
TYPICAL PERFORMANCE CURVES CONT'D
6
PRELIMINARY Rev. E 12/17
MECHANICAL SPECIFICATIONS
ꢀ
ꢀ
ESD TRIANGLE INDICATES PIN 1
WEIGHT=1.5 GRAMS TYPICAL
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
MSK5983 K RH
LEAD CONFIGURATIONS
BLANK= STRAIGHT
RADIATION HARDENED
SCREENING
BLANK= INDUSTRIAL
K=MIL-PRF-38534 CLASS K;
H=MIL-PRF-38534 CLASS H
GENERAL PART NUMBER
ꢀ
The above example is a Class K regulator with straight leads.
7
PRELIMINARY Rev. E 12/17
MECHANICAL SPECIFICATIONS
ESD TRIANGLE INDICATES PIN 1
WEIGHT=1.5 GRAMS TYPICAL
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
MSK5983 K RH G
LEAD CONFIGURATIONS
G=GULL WING
RADIATION HARDENED
SCREENING
BLANK= INDUSTRIAL
K=MIL-PRF-38534 CLASS K;
H=MIL-PRF-38534 CLASS H
GENERAL PART NUMBER
The above example is a Class K regulator with gull wing lead form.
8
PRELIMINARY Rev. E 12/17
REVISION HISTORY
REV
STATUS
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
DATE
01/14
01/14
03/14
08/14
01/15
12/17
DESCRIPTION
-
Initial Release
A
B
C
D
E
Add clarifications for block diagram, electrical specifications, max ratings and applications section
Add clarifications, electrical specifications
Update electrical specifications
Update electrical specifications
Add ESD rating
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 and radiation status.
PRELIMINARY Rev. E 12/17
9
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