MSK5986RH [ANAREN]
RAD HARD POSITIVE, 2.8A, SINGLE RESISTOR ADJ VOLTAGE REGULATOR;
| 型号： | MSK5986RH |
| 厂家： | 
ANAREN MICROWAVE |
| 描述： | RAD HARD POSITIVE, 2.8A, SINGLE RESISTOR ADJ VOLTAGE REGULATOR |
| 文件： | 总7页 (文件大小：486K) |
| 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, SINGLE RESISTOR
5986RH
ADJ VOLTAGE REGULATOR
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 Krads(Si) (Method 1019.7 Condition A)
• 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 MSK5986RH offers 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 MSK5986RH is hermetically sealed in a space efficient 3 pin power surface mount ceramic package.
EQUIVALENT SCHEMATIC
PIN-OUT INFORMATION
TYPICAL APPLICATIONS
• High Efficiency Linear Regulators
• Constant Voltage/Current Regulators
• Space System Power Supplies
1
2
3
SET
VIN
VOUT
• Switching Power Supply Post Regulators
• Very low Voltage Power Supplies
LID=ISOLATED
1
8548-169 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
Output Current......................................................... 3.0A
Set Pin Current ................................................... ±25mA
Set Pin Voltage....................................................... ±10V
IOUT
ISET
VSET
8
7
MSK5986RH.......................................... -40°C to +85°C
MSK5986K/H RH................................. -55°C to +125°C
ESD Rating......................................................... CLASS 2
ELECTRICAL SPECIFICATIONS
MSK 5986K/H RH
MSK 5986RH
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
VIN = 3.0V VOUT = 1.0V 5mA ≤ ILOAD ≤ 2.8A
Post Radiation
Set Pin Current
(ISET)
-
-
-
-
49
49
-4.5
-
51
4.5
-
uA
VIN = 3.0V VOUT = 1.0V
ILOAD = 5mA
1
-4.5
-6
0
4.5
6
0
mV
mV
mV
nA
Output Offset Voltage
(VOS)
2, 3
1, 2, 3
1, 2, 3
-
-
-4
-
4
-4
-
4
VIN = 3.0V VOUT = 0V 5mA ≤ ILOAD ≤ 2.8A
(δVOS)
(δISET)
(δVOS)
Load Regulation
Line Regulation
-300
-10
+300
-300
-10
+300
δVIN = 3V TO 24V
VOUT = 0V
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% δVOUT
10% δVOUT
1
1
-
-
1.47
1.94
3.4
-
-
-
-
1.47
1.94
3.4
-
-
-
V
V
Dropout Voltage
2
VOUT = 1.0V ILOAD = 2.8A
-
1
2.8
2.8
-
-
2.8
-
A
Current Limit
9
VIN = 5.0V VOUT = 1.0V
VIN = 23V
2, 3
-
-
-
-
-
-
A
Minimum Load Current
Ripple Rejection
6
-
1
-
-
1
-
mA
dB
2
-
-
85
85
F = 120Hz
δVIN = 0.5Vpp
VIN = 3V RLOAD = 2.5Ω
Output Noise
2
CSET = 0.1uF
-
-
-
-
40
-
-
-
40
-
uVRMS
°C/W
10Hz to 100KHz
Thermal Resistance
2
Junction to Case @ 125°C
1.5
1.9
1.5
1.9
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.
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
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
8548-169 Rev. F 2/18
APPLICATION NOTES
OUTPUT VOLTAGE
LOAD REGULATION
A single resistor (RSET) from the SET pin to ground creates the reference
voltage for the internal Error Amplifier. The MSK5986RH 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.
The MSK5986RH specified load regulation is Kelvin Sensed, therefore
the parasitic resistance of the system must be considered to design an
acceptable load regulation. The overall load regulation includes the spec-
ified MSK5986RH load regulation plus the parasitic resistance multiplied
by the load current as shown in Figure 2. RSO is the series resistance of
all conductors between the MSK5986RH 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
Pin 1 is the connection to the collector of the power device and the control
circuitry of the MSK5986RH. 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.
FIGURE 2
PARALLELING DEVICES
When currents greater than 2.8A are needed, the MSK5986RH's may be
paralleled to multiply the current capacity. As shown in Figure 3, 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
MSK5986RH 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".
VIN
The VIN pin supplies power to the control circuitry and the collector of the
output pass transistor. Control ciruitry requirements determine the minimum
input voltage for the device. For proper operation VIN should be a minimum of
1.55V greater than VOUT. Reference the dropout curve for more information.
OUTPUT CAPACITANCE
For stability purposes, the MSK5986RH requires a minimum output capac-
itor of 10µF with an ESR of 0.5Ω or less. Tantalum or ceramic capacitors are
recommended. 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.
ADDITIONAL STABILITY
A capacitor placed in parallel with the SET pin resistor to ground, will im-
prove 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.
FIGURE 3
3
8548-169 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 MSK5986RH 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 MSK5986RH down to 0V output. Select RS to maintain be-
tween 1mAand 10mAof current through the reference; see Figure 4
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 MSK5986RH 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 MSK5986RH:
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 = 1.9°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 4
ADDING SHUTDOWN
RθSA= (TJ - TA)/PD - (RθJC) - (RθCS)
=(125°C - 90°C)/3.0W - 1.9°C/W - 0.15°C/W
=9.6°C/W
The MSK5986RH 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 5, 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 9.6°C/W. Therefore, a heat sink with a
thermal resistance of no more than 9.6°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 MSK5986RH 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 5
4
8548-169 Rev. F 2/18
TYPICAL PERFORMANCE CURVES
?
5
8548-169 Rev. F 2/18
MECHANICAL SPECIFICATIONS
ALL DIMENSIONS ARE SPECIFIED IN INCHES
WEIGHT= 2.2 GRAMS TYPICAL
ORDERING INFORMATION
MSK5986 K RH
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.
6
8548-169 Rev. F 2/18
REVISION HISTORY
REV
-
STATUS
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
Released
DATE
01/14
01/14
03/14
04/14
09/14
12/17
02/18
DESCRIPTION
Initial Release
A
Add clarifications for block diagram, electrical specifications, max ratings and applications section.
B
Add clarifications.
C
Correct pin designations.
Update electrical specifications.
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.
7
8548-169 Rev. F 2/18
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