MSK5922-3.3RHD [MSK]

Fixed Positive LDO Regulator, 3.3V, 0.45V Dropout, PSFM5, HERMATIC SEALED, BENT DOWN, SIP-5;


型号：	MSK5922-3.3RHD
厂家：	M.S. KENNEDY CORPORATION
描述：	Fixed Positive LDO Regulator, 3.3V, 0.45V Dropout, PSFM5, HERMATIC SEALED, BENT DOWN, SIP-5 局域网输出元件调节器
文件：	总7页 (文件大小：317K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MIL-PRF-38534 CERTIFIED FACILITY

RAD HARD

5922RH

ULTRA LOW DROPOUT

POSITIVE LINEAR REGULATOR

SERIES

M.S.KENNEDY CORP.

4707 Dey Road Liverpool, N.Y. 13088

(315) 701-6751

FEATURES:

Total Dose Tested to 300K RAD (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

Initial Output Tolerance of 0.5%

DESCRIPTION:

The MSK 5922RH is a rad hard fixed linear regulator capable of delivering 5.0 amps of output current. Typical

dropout is only 0.22 volts with a 2.5 amp load. Separated power and bias simplifies supply tracking. This device also

has latching overload protection. The MSK 5922RH 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

PIN-OUT INFORMATION

Satellite System Power Supplies

Switching Power Supply Post Regulators

Constant Voltage/Current Regulators

Microprocessor Power Supplies

1 VIN

2 VBIAS

3 VOUT

4 GND

5 LATCH

Rev. H 6/11

ABSOLUTE MAXIMUM RATINGS

+VBIAS

Bias Supply Voltage

Supply Voltage

Output Current

Case Operating Temperature Range

MSK5922K/H RH

MSK5922RH

+10V

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

Group A

MSK5922K/H RH

MSK5922RH

Test Conditions

Parameter

Units

Min.

Typ.

Subgroup

Typ.

Max.

6.5

Max.

Min.

Note 10

Input Voltage Range

10mA ≤ IOUT ≤ 1.0A

VBIAS ≥ VIN

1,2,3

6.5 Note 10

2.9

Input Bias Voltage

Quiescent Current

Bias Current

5.0

6.5

2.9

IIN+IBIAS, VBIAS=VIN=6.5V, Not including IOUT

VBIAS=6.5V

±0.1

±0.1 ±1.0

±0.5

±2.5

±4.0

±0.50

±2.5

±0.80

±2.5

0.40

0.30

VIN=VOUT+1V

Output Voltage Tolerance

2,3

IOUT=1A

Post Radiation

±4.5

Line Regulation

IOUT=50mA

VOUT+0.4V ≤ VIN ≤ 6.5V

50mA ≤ IOUT ≤ 3.0A

VIN = VOUT+1V

±0.1

0.01

±0.60

2,3

Load Regulation

±0.06

0.06

±1.0

2,3

0.22

0.45

IOUT=2.5A

0.26

Delta VOUT=1%

2,3

Dropout Voltage

0.11

Pin 5(Latch)=GND

IOUT=0.5A

0.11

0.30

0.12

2,3

3.0

Output Current Limit

VIN=VOUT+1V Overcurrent Latch Up

2,3

Ripple Rejection

f=120Hz

IOUT = 50mA

°C/W

5,6

Thermal Resistance

Junction to Case @ 125°C Output Device

2.2

3.0

3.5

PART NUMBER

MSK5922-1.5

MSK5922-1.9

MSK5922-2.5

MSK5922-2.8

MSK5922-3.3

MSK5922-5.0

OUTPUT VOLTAGE

+1.5V

+1.9V

+2.5V

+2.8V

+3.3V

+5.0V

NOTES:

Unless otherwise specified, VIN=VOUT+1V, VBIAS=5V and IOUT=10mA. See figure 2 for typical test 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" and "K" 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 dependent upon the values of VIN and VOUT. See Figure 1 and typical performance curves.

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

VIN shall be as specified or VIN min., whichever is greater.

With VBIAS (Pin 2) connected to a separate source, VIN MIN is VOUT+VDROPOUT; see dropout specifications and performance curves.

Saturation voltage varies with load. See typical performance curves. Latch Pin=GND to prevent latch off during testing, see latch pin description.

Pre and post irradiation limits, at +25°C, up to 100Krad TID, are identical unless otherwise specified.

Rev. H 6/11

APPLICATION NOTES

PIN FUNCTIONS

START UP OPTIONS

VIN - This pin provides the input power connection to the MSK

5922RH. This is the supply that will be regulated to the output.

Input voltage range is VOUT + VDROPOUT to 6.5V.

The MSK 5922RH starts up and begins regulating immedi-

ately when VBIAS and VIN are applied simultaneously. Apply-

ing VBIAS before VIN starts the MSK 5922RH 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 volt-

age range is 2.9V to 6.5V. VBIAS should be kept greater than or

equal to VIN.

LATCH - The MSK 5922RH 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. In the event of an overcurrent condition,

output short circuit or dropout condition, the pass transistor and

drive circuit will saturate and initiate the latch timing circuit.The

capacitor is charged to approximately 1.6V from a 7.2μA (nomi-

nal) current source. Exceeding the thermal limit charges the latch

capacitor from a larger current source for a near instant shut-

down. 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 dis-

ables 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 capaci-

tor 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.

OVERCURRENT LATCH-OFF/LATCH PIN CAPACITOR

SELECTION

GND - Internally connected to ground, this pin should be con-

nected externally by the user to the circuit ground.

As previously mentioned, the LATCH pin provides over cur-

rent/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.

VOUT - This is the output pin for the device.

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 ca-

pacitor should also be used for high frequency bypassing. See

typical application circuit.

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).

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 capaci-

tors (0.1μF typical) 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 that

screening for a maximum ESR of 57mΩ ensures EOL stability

criteria to be met for many applications with the most stringent

requirements. The typical ESR of the TAZH227K010L from AVX

is 49mΩ . Analysis of the final design is recommended to ensure

stability requirements are met.

The MSK 5922RH current limit function is directly affected by

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

contact the factory for more information.

Rev. H 6/11

APPLICATION NOTES CONT.

THERMAL LIMITING

The MSK 5922RH 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 5922RH. Momentarily pull the latch pin

low or cycle the power to reset the latch.

TYPICAL APPLICATIONS CIRCUIT

HEAT SINK SELECTION

To select a heat sink for the MSK 5922RH, the follow-

ing formula for convective heat flow may be used.

Governing Equation:

TJ = PD X (RθJC + RθCS + RθSA) + TA

FIGURE 2

Where

= Junction Temperature

= Total Power Dissipation

RθJC = Junction to Case Thermal Resistance

RθCS = Case to Heat Sink Thermal Resistance

RθSA = Heat Sink to Ambient Thermal Resistance

= Ambient Temperature

TOTAL DOSE RADIATION TEST

PERFORMANCE

Power Dissipation=(VIN-VOUT) x IOUT

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 5922RH is nearly identical to the MSK

5920RH. It is manufactured with the same materials and

component lots that are used in and have been TID tested

in the MSK 5920RH. The MSK5920RH TID radiation re-

port is used to provide TID characterization data fo the

MSK 5922RH.

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

5920RH radiation test report. The complete radiation test

report is available in the RAD HARD PRODUCTS section

on the MSK website.

Example:

An MSK 5922-2.5RH is connected for VIN=+3.3V and

VOUT=+2.5V. IOUT is a continuous 3A DC level. The am-

bient temperature is +25°C. The maximum desired junc-

tion temperature is +125°C.

RθJC=3.0°C/W and RθCS=0.15°C/W for most thermal

greases

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

Power Dissipation=(3.3V-2.5V) x (3A)

=2.4 Watts

Solve for RθSA:

125°C - 25°C

RθSA=

- 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.

Rev. H 6/11

TYPICAL PERFORMANCE CURVES

Rev. H 6/11

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 6/11

MECHANICAL SPECIFICATIONS

WEIGHT=7.7 GRAMS TYPICAL

ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.

ESD Triangle indicates pin 1.

ORDERING INFORMATION

MSK5922-3.3 K RH U

LEAD CONFIGURATIONS

S= STRAIGHT; U= BENT UP; D= BENT DOWN

RADIATION HARDENED

SCREENING

BLANK= INDUSTRIAL; E=EXTENDED RELIABILITY

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.

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 6/11

MSK5922-3.3RHD [MSK]

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