MSK5810RHG [MSK]

Adjustable Positive LDO Regulator, 1.5V Min, 7V Max, 0.45V Dropout, CDSO20, HERMETIC SEALED, FP-20;


型号：	MSK5810RHG
厂家：	M.S. KENNEDY CORPORATION
描述：	Adjustable Positive LDO Regulator, 1.5V Min, 7V Max, 0.45V Dropout, CDSO20, HERMETIC SEALED, FP-20 CD 输出元件调节器
文件：	总9页 (文件大小：1817K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MIL-PRF-38534 CERTIFIED

RAD HARD ULTRA LOW

DROPOUT ADJUSTABLE

POSITIVE LINEAR REGULATOR

5810RH

M.S.KENNEDY CORP.

4707 Dey Road Liverpool, N.Y. 13088

(315) 701-6751

FEATURES:

Manufactured using

Space Qualified RH1573 Die

New "Harder" Version of MSK 5910RH

Total Dose Hardened to 300 Krads(Si) (Method 1019.7 Condition A)

Ultra Low Dropout for Reduced Power Consumption

External Shutdown/Reset Function

Latching Overload Protection

Adjustable Output Using Two External Resistors

Output Current Limit

Surface Mount Package Available with Lead Forming

Up to 5A Output Current

Available to DSCC SMD 5962F09216

ELDRS Tested to 100 Krads(Si) (Method 1019.7 Condition D)

Neutron Tested to 1.0x10¹² n/cm² (Method 1017.2)

DESCRIPTION:

The MSK 5810RH is a rad hard adjustable linear regulator capable of delivering 5.0 amps of output current. The

typical dropout is only 0.11 volts at 1 amp. An external shutdown/reset function is ideal for power supply sequencing.

This device also has latching overload protection that requires no external current sense resistor. The MSK 5810RH

is radiation hardened and specifically designed for many space/satellite applications. The device is packaged in a

hermetically sealed 20 pin flatpack that can be lead formed for surface mount applications.

EQUIVALENT SCHEMATIC

TYPICAL APPLICATIONS

PIN-OUT INFORMATION

Satellite System Power Supplies

Switching Power Supply Post Regulators

Constant Voltage/Current Regulators

Microprocessor Power Supplies

1 VINA

2 VINB

3 VINC

4 VIND

5 VINE

6 VBIAS

7 GND1

8 GND1

9 Latch

10 Shutdown

VOUTE

VOUTD

VOUTC

VOUTB

VOUTA

GND2

Rev. H 2/11

ABSOLUTE MAXIMUM RATINGS

VBIAS

Bias Supply Voltage

Supply Voltage

Output Current

Case Operating Temperature Range

MSK5810K/H RH

MSK5810RH

10.0V

TST

TLD

Storage Temperature Range -65°C to +150°C

VIN

IOUT

Lead Temperature Range

(10 Seconds)

300°C

Power Dissipation

Junction Temperature

See SOA Curve

150°C

-55°C to +125°C

-40°C to +85°C

ELECTRICAL SPECIFICATIONS

NOTES:

Unless otherwise specified, VBIAS=VIN=5.0V, R1=1.62K, VSHUTDOWN=0V and IOUT=10mA. IOUT is subtracted from IQ measurement. See typical application 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" 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 tested with a low duty cycle pulse to minimize junction heating and is dependent on the values of VIN, VOUT and case

temperature. See Typical Performance Curves.

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

Pre and post irradiation limits @ 25°C, up to 300Krad TID, are identical unless otherwise specified.

Reference DSCC SMD 5962F09216 for electrical specification for devices purchased as such.

Rev. H 2/11

APPLICATION NOTES

PIN FUNCTIONS

START UP OPTIONS

VIN A,B,C,D,E - These pins provide the input power connection to the

The MSK 5810RH starts up and begins regulating immediately when

MSK 5810RH. This is the supply that will be regulated to the output. VBIAS and VIN are applied simultaneously. Applying VBIAS before

All five pins must be connected for proper operation.

VIN starts the MSK 5810RH up in a disabled or latched state. When

starting in a latched state the device output can be enabled either by

pulling the latch pin low to drain the latch capacitor or pulsing the

shutdown pin high. The shutdown pulse duration is partially depen-

dent upon the size of the latch capacitor and should be characterized

for each application; 30uS is typically adequate for a 1uF latch ca-

pacitor at 25°C. A momentary high pulse on the shutdown pin can

be achieved using the RC circuit below if VIN rises rapidly. The resis-

tor and capacitor must be selected based on the required pulse dura-

tion, the rise characteristic of VIN and the shutdown pin threshold

(see shutdown pin threshold and current curves).

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 7.5V. VBIAS should be kept greater than or equal to VIN.

GND1 - Internally connected to input ground, these pins should be

connected externally by the user to the circuit ground and the GND2

pins.

LATCH - The MSK 5810RH 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

7.2A (nominal) current source. Exceeding the thermal limit will charge

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, toggle

the shutdown pin high then low or cycle the power to reset the latch.

Toggling the shutdown pin or cycling the bias power both disable the

device during the reset operation (see SHUTDOWN pin description).

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.

The shutdown pin can be held high and pulled low after VIN comes

up or the latch pin held low and released after VIN comes up to

ensure automatic startup when applying VBIAS before VIN. Either of

the basic circuits below can be adapted to a variety of applications

for automatic start up when VBIAS rises before VIN.

SHUTDOWN - There are two functions to the SHUTDOWN pin. It may

be used to disable the output voltage or to reset the LATCH pin. To

activate the shutdown/reset functions the user must apply a voltage

greater than 1.3V to the SHUTDOWN pin. The output voltage will

turn on when the SHUTDOWN pin is pulled below the threshold volt-

age. If the SHUTDOWN pin is not used, it should be connected to

ground.

FB - The FB pin is the inverting input of the internal error amplifier. The

non-inverting input is connected to an internal 1.265V reference. This

error amplifier controls the drive to the output transistor to force the FB

pin to 1.265V. An external resistor divider is connected to the output, FB

pin and ground to set the output voltage.

GND2 - Internally connected to output ground, these pins should be

connected externally by the user to the circuit ground and the GND1

pins.

VOUT A,B,C,D,E - These are the output pins for the device. All five

pins must be connected for proper operation.

OVERCURRENT LATCH-OFF/LATCH PIN CAPACITOR SE-

LECTION

OUTPUT CAPACITOR SELECTION

Low ESR output capacitors are required to maintain regulation and

stability. Four CWR29FB227 (AVX PN TAZH227K010L) tantalum

capacitors in parallel with ceramic decoupling capacitors (0.1F typi-

cal) provides sufficient gain and phase margin for most applications.

The maximum ESR specification for the CWR29FB227 capacitor is

180mΩ at 100kHz and is sufficient for many applications. MSK has

found through full WCCA on the MSK 5820RH-1.5 that screening for

a maximum ESR of 57mΩ ensures EOL stability criteria to be met for

many applications with the most stringent requirements. Analysis of

the final design is recommended to ensure stability requirements are

met.

As previously mentioned, the LATCH pin provides over current/

output short circuit protection with a timed latch-off circuit. Refer-

ence the LATCH pin description note. The latch off time out is deter-

mined 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 7.2A at VBIAS=3V

and 8A at VBIAS=7V.

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 MSK 5810RH current limit function is directly affected by the

input and output voltages. Custom current limit is available; contact

the factory for more information.

POWER SUPPLY BYPASSING

To maximize transient response and minimize power supply tran-

sients it is recommended that a 33F minimum tantalum capacitor is

connected between VIN and ground. A 0.1F ceramic capacitor should

also be used for high frequency bypassing.

Rev. H 2/11

TYPICAL APPLICATIONS CIRCUIT

APPLICATION NOTES CONT.

THERMAL LIMITING

The MSK 5810RH 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 5810RH. See LATCH pin description for

instructions to reset the latch or disable the latch fea-

ture.

HEAT SINK SELECTION

To select a heat sink for the MSK 5810RH, the follow-

ing formula for convective heat flow may be used.

VOUT=1.265(1+R1/R2)

OUTPUT VOLTAGE SELECTION

Governing Equation:

TJ = PD X (RθJC + RθCS + RθSA) + TA

As noted in the above typical applications circuit,

the formula for output voltage selection is

Where

= Junction Temperature

= Total Power Dissipation

VOUT=1.265

RθJC = Junction to Case Thermal Resistance

RθCS = Case to Heat Sink Thermal Resistance

RθSA = Heat Sink to Ambient Thermal Resistance

A good starting point for this output voltage selection is

to set R2=1K. By rearranging the formula it is simple to

calculate the final R1 value.

= Ambient Temperature

VOUT

1.265

R1=R2

-1

Power Dissipation=(VIN-VOUT) x IOUT

START UP CURRENT

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).

The MSK 5810RH 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.

Example:

An MSK 5810RH is connected for VIN=+5V and

VOUT=+3.3V. IOUT is a continuous 1A DC level. The

ambient temperature is +25°C. The maximum desired

junction temperature is +125°C.

http://www.mskennedy.com/

RθJC=8.5°C/W and RθCS=0.15°C/W for most thermal

greases

Power Dissipation=(5V-3.3V) x (1A)

=1.7Watts

Solve for RθSA:

TOTAL DOSE RADIATION TEST

PERFORMANCE

Radiation performance curves for TID testing have been

generated for all radiation testing performed by MS

Kennedy. These curves show performance trends through-

out the TID test process and can be located in the MSK

5810RH radiation test report. The complete radiation test

report is available in the RAD HARD PRODUCTS section

on the MSK website.

125°C - 25°C

RθSA=

-8.4°C/W - 0.15°C/W

1.7W

= 50.3°C/W

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

In this example, a heat sink with a thermal resistance

of no more than 50°C/W must be used to maintain a

junction temperature of no more than 125°C.

Reference the MSK 5826RH RAD REPORT for ELDRS

and Neutron results.

Rev. H 2/11

TYPICAL PERFORMANCE CURVES

Rev. H 2/11

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.

Rev. H 2/11

TYPICAL PERFORMANCE CURVES CONT'D

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.

Rev. H 2/11

MECHANICAL SPECIFICATIONS

WEIGHT=3.5 GRAMS TYPICAL

NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.

ESD Triangle indicates pin 1.

ORDERING INFORMATION

SCREENING LEVEL

PART NUMBER

LEADS

INDUSTRIAL

MSK5810RH

MIL-PRF-38534 CLASS H

MIL-PRF-38534 CLASS K

DSCC SMD

MSK5810HRH

MSK5810KRH

STRAIGHT

5962F09216

Rev. H 2/11

MECHANICAL SPECIFICATIONS CONTINUED

WEIGHT=3.3 GRAMS TYPICAL

ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.

ESD Triangle indicates pin 1.

ORDERING INFORMATION

SCREENING LEVEL

PART NUMBER

LEADS

INDUSTRIAL

MSK5810RHG

MIL-PRF-38534 CLASS H

MSK5810HRHG

GULL

WING

MSK5810KRHG

5962F09216

MIL-PRF-38534 CLASS K

DSCC SMD

M.S. Kennedy Corp.

4707 Dey Road, Liverpool, New York 13088

Phone (315) 701-6751

FAX (315) 701-6752

www.mskennedy.com

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.

Rev. H 2/11

MSK5810RHG [MSK]

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