typical applications mil-prf-38534 & 38535 certified facility 5822rh series features: satellite system power supplies switching power supply post regulators constant voltage/current regulators microprocessor power supplies rad hard ultra low dropout positive linear regulator equivalent schematic typical applications description: the msk5822rh is a rad hard fxed linear regulator capable of delivering 5.0 amps of output current. typical dropout is only 0.35 volts with a 2.5 amp load. separated power and bias simplifes supply tracking. this device also has latching overload protection. the msk5822rh is radiation hardened and specifcally designed for space/satellite applications. the device is packaged in a hermetically sealed space effcient 5 pin sip that is electrically isolated from the internal circuitry allowing for direct heat sinking. pin-out information vin vbias vout gnd latch manufactured using space qualifed rh1573 die new "harder" version of msk5922rh total dose hardened to 300 krads(si) (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 effciency available to dscc smd 5962f09236 eldrs tested to 100 krads(si) (method 1019.7 condition d) neutron tested to 1.0x1012 n/cm2 (method 1017.2) 1 2 3 4 5 1 case=isolated 8548-61 rev. k 8/15
storage temperature range lead temperature range (10 seconds) power dissipation junction temperature absolute maximum ratings +10v +10v 5a -55c to +125c -40c to +85c bias supply voltage supply voltage output current case operating temperature range msk5822k/h rh msk5822rh -65c to +150c 300c see soa curve 150c 1 2 3 4 5 6 7 8 9 10 11 12 13 t st t ld p d t c vbias vin i out t c unless otherwise specifed, vin=vout+1v, vbias=5v and i out =10ma. see fgure 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" suffx) shall be 100% tested to subgroups 1,2,3 and 4. subgroup 5 and 6 testing available upon request. subgroup 1,4 t c =+25c subgroup 2,5 t c =+125c subgroup 3,6 t a =-55c 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 ef fect the device performance and/or life cycle. vin shall be as specifed or vin min., whichever is greater. saturation voltage varies with load. see typical performance curves. pre and post irradiation limits, at +25c, up to 300krad tid, are identical unless otherwise specifed. reference dscc smd 5962f09236 for electrical specifcations for devices purchased as such. internal solder refow temperature is 180c, do not exceed. notes: electrical specifications 2 8 part number msk5822-1.5 msk5822-1.9 msk5822-2.5 msk5822-2.8 msk5822-3.3 msk5822-5.0 output voltage +1.5v +1.9v +2.5v +2.8v +3.3v +5.0v 7 13 8548-61 rev. k 8/15
application notes vin - this pin provides the input power connection to the msk5822rh. this is the supply that will be regulated to the output. input voltage range is vout + v dropout to 6.5v. vbias - this pin provides power to all internal circuitry includ - ing bias, start-up, thermal limit and overcurrent latch. vbias voltage range is 2.9v to 6.5v. vbias should be kept greater than or equal to vin. latch - the msk5822rh latch pin is used for both cur - rent 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 charges 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, or cycle the power to reset the latch. cycling the bias power disables 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 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. gnd - internally connected to ground, this pin should be connected externally by the user to the circuit ground. vout - this is the output pin for the device. output capacitors are required to maintain regulation and stability. between 440 and 100f surface mount, low esr, tantalum capacitor from the output to ground should suffce under most conditions. see typical application circuit for rec - ommended capacitance. ceramic output capacitors (0.1f typical) should be placed directly across the load power con - nections as close to the load as possible. if the user fnds that tighter voltage regulation is needed during output transients, more capacitance may be added. if more capacitance is added to the output, the bandwidth may suffer. input power supply bypassing 3 to maximize transient response and minimize power supply transients it is recommended that two 47f tantalum capaci - tors are connected between vin and ground. a 0.1f ceramic capacitor should also be used for high frequency bypassing. see typical application circuit. start up options the msk5822rh starts up and begins regulating imme - diately when vbias and vin are applied simultaneously. applying vbias before vin starts the msk5822rh 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. as previously mentioned, the latch pin provides over current/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 25c, the latch charging current is 7.2a at vbias=3v and 8a at vbias=6.5v. 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 per - formance curves). the msk5822rh current limit function is directly affected by the input and output voltages. custom current limit is available; contact the factory for more information. overcurrent latch-off/latch pin capacitor selection output capacitor selection the msk5822rh sinks increased current during startup to bring up the output voltage. reference the "saturated drive current vs. input voltage" graph in the typical performance curves of this data sheet and the "understanding startup surge current with ms kennedy's rh1573 based rad hard ldo regulators" application note in the application notes section of the msk web site for more information. http://www.anaren.com/msk start up current pin functions 8548-61 rev. k 8/15
r sa application notes cont'd 4 rvhohfwdkhdwvlqniruwkh5+wkhiroorlqj irupxodirufrqyhfwlyhkhdwrpdehxvhg governing equation: t j = p d 5 jc + r cs + r sa a where t j = junction temperature p d = total power dissipation r jc = junction to case thermal resistance r cs dvhwr+hdwlqnkhupdo5hvlvwdqfh r sa +hdwlqnwrpelhqwkhupdo5hvlvwdqfh t a pelhqwhpshudwxuh rhu'lvvlsdwlrq 28 out hwwkhxvhupxvwvhohfwdpdlpxpmxqfwlrqwhpshud - wxuhkhdevroxwhpdlpxpdoordeohmxqfwlrqwhpshudwxuh lvkhhtxdwlrqpdqrehuhduudqjhgwrvroyhiru wkhuhtxluhgkhdwvlqnwrdpelhqwwkhupdouhvlvwdqfh5 sa example: g g out lvdfrqwlqxrxv'ohyhokhdpel - hqwwhpshudwxuhlvkhpdlpxpghvluhgmxqfwlrq whpshudwxuhlv r jc dqg5 cs iruprvwwkhupdo greases rhu'lvvlsdwlrq dwwv royhiru5 qwklvhdpsohdkhdwvlqnlwkdwkhupdouhvlvwdqfhri qrpruhwkdqpxvwehxvhgwrpdlqwdlqdmxqfwlrq whpshudwxuhriqrpruhwkdq the msk5822rh control circuitry has a thermal shutdown whpshudwxuhridssurlpdwhoklvwkhupdovkxwgrq fdqehxvhgdvdsurwhfwlrqihdwxuhexwirufrqwlqxrxvrshu - dwlrqwkhmxqfwlrqwhpshudwxuhriwkhsdvvwudqvlvwrupxvweh pdlqwdlqhgehorurshukhdwvlqnvhohfwlrqlvhvvhq - wldowrpdlqwdlqwkhvhfrqglwlrqvfhhglqjwkhwkhupdoolplw dfwlydwhvwkhodwfkihdwxuhriwkh5+rphqwdulo sxoowkhodwfkslqorruffohwkhsrhuwruhvhwwkhodwfk typical applications circuit figure 2 thermal limiting heat sink selection 5dgldwlrshuirupdfhfuyhviruwhvwlkdyhehh hhudwhgirudooudgldwlrwhvwlshuiruphgekhvh fuyhv vkr shuirupdfh wuhgv wkurkrw wkh whvw process and are located in the msk5822rh radiation test uhsruwkhfrpsohwhudgldwlrqwhvwuhsruwlooehdydlodeohlq wkh5'+5'52'8vhfwlrqrqwkhhevlwh total dose radiation test performance http://www.mskennedy.com/store.asp?pid=9951&catid=19680 506.5555/56 1 5.
typical performance curves 5 8548-61 rev. k 8/15
6 typical performance curves gain and phase response the gain and phase response curves are for the msk typical application circuit at 25c 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. 8548-61 rev. k 8/15
mechanical specifications ordering information lead configurations g= gull wing radiation hardened screening blank= industrial 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 msk5822-3.3 k rh gw the above example is a +3.3v, class k regulator with leads bent up. note: see dscc smd 5962f09236 for dscc part number options. esd triangle indicates pin 1 weight=7.7 grams typical all dimensions are specified in inches 7 8548-61 rev. k 8/15
mechanical specifications ordering information 8 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 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 msk5822-3.3 k rh u the above example is a +3.3v, class k regulator with leads bent up. note: see dscc smd 5962f09236 for dscc part number options. esd triangle indicates pin 1 weight=7.7 grams typical all dimensions are specified in inches 8548-61 rev. k 8/15
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 specifcations 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. msk www.anaren.com/msk 9 revision history 8548-61 rev. k 8/15
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