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1/13 june 2005 2 and 3a low dropout voltage embedded overtemperature, overcurrent protections adjustable current limitation output overload monitoring/ signalling fixed 2.5; 3.3v; 5.0v output voltages inhibit (on/off) ttl compatible control programmable output short circuit current remote sensing operation radhard: tested up to 300krad in mil 1019.6 and low dose rate conditions heavy ions sel, seu free. sustains 2x10 14 proton/cm 2 , and 2x10 14 neutron/cm 2 description the rhfl4913 fixed is a high performance rad hard positive voltage regulator family. available into various hermetic ceramic packages, it is specifically intended for space and harsh radiation environments. input supply range is up to 12 volts. rhfl4913 fixed is qml-v qualified, dscc smd are 5962f02534 / 02535 / 02536. rhfl4913 fixed version rad-hard positive fixed voltage regulators figure 1: block diagram for package smd.5 and to-257 smd.5 to-257 flat-16 rev. 7
rhfl4913 fixed version 2/13 figure 2: block diagram for package flat-16 table 1: absolute maximum ratings (note 1) note 1: exceeding maximum ratings may damage the device. note 2: internally limited to about maximum +175c by thermal shutdown circuit. table 2: thermal data symbol parameter value unit v i dc input voltage, v i - v ground 14 v i o output current rhfl4913s, esy 3 a rhfl4913kp 2 p d t c = 25c power dissipation kp, s versions 15 w esy version 10 t stg storage temperature range -65 to +150 c t op operating junction temperature range -55 to +150 c t j junction temperature (note 2) +150 c esd electrostatic discharge capability class 3 symbol parameter flat-16 to-257 smd.5 unit r thj-case thermal resistance junction-case max 8.3 12.5 8.3 c/w t sold maximum soldering temperature, 10sec. 300 c
rhfl4913 fixed version 3/13 figure 3: pin connection (top view, bottom view for smd.5) table 3: pin description pin n flat-16 smd.5 to-257 v o 1, 2, 6, 7 1 3 v i 3, 4, 5 2 1 gnd 13 3 2 i sc 8 ocm 10 inhibit 14 sense 16 nc 9, 11, 12, 15 flat-16 to-257 smd.5
rhfl4913 fixed version 4/13 table 4: order codes table 5: part number - smd equivalence note: 3v version is available on request. die flat-16 smd.5 to-257 terminal finish out. volt. q.ty level rhfl4913kp25-01v rhfl4913s25-03v rhfl4913esy2505v gold 2.5 v qml-v rhfl4913kp25-02v rhfl4913s25-04v rhfl4913esy2506v solder 2.5 v qml-v rhfl4913kp251 rhfl4913s251 rhfl4913esy251 gold 2.5 v em1 rhfl4913kp252 rhfl4913s252 rhfl4913esy252 gold 2.5 v em1=em2 +48h b.i. l491325die2v na 2.5 v qml-v l491325die2s na 2.5 v em1 rhfl4913kp33-01v rhfl4913s33-03v rhfl4913esy3305v gold 3.3 v qml-v rhfl4913kp33-02v rhfl4913s33-04v rhfl4913esy3306v solder 3.3 v qml-v rhfl4913kp331 rhfl4913s331 RHFL4913ESY331 gold 3.3 v em1 rhfl4913kp332 rhfl4913s332 rhfl4913esy332 gold 3.3 v em1=em2 +48h b.i. l491333die2v na 3.3 v qml-v l491333die2s na 3.3 v em1 rhfl4913kp50-01v rhfl4913s50-03v rhfl4913esy5005v gold 5.0 v qml-v rhfl4913kp50-02v rhfl4913s50-04v rhfl4913esy5006v solder 5.0 v qml-v rhfl4913kp501 rhfl4913s501 rhfl4913esy501 gold 5.0 v em1 rhfl4913kp502 rhfl4913s502 rhfl4913esy502 gold 5.0 v em1=em2 +48h b.i. l491350die2v na 5.0 v qml-v l491350die2s na 5.0 v em1 st part number smd part number rhfl4913kp25-01v 5962f0253401vxc rhfl4913kp25-02v 5962f0253401vxa rhfl4913kp33-01v 5962f0253501vxc rhfl4913kp33-02v 5962f0253501vxa rhfl4913kp50-01v 5962f0253601vxc rhfl4913kp50-02v 5962f0253601vxa rhfl4913s25-03v 5962f0253402vyc rhfl4913s25-04v 5962f0253402vya rhfl4913s33-03v 5962f0253502vyc rhfl4913s33-04v 5962f0253502vya rhfl4913s50-03v 5962f0253602vyc rhfl4913s50-04v 5962f0253602vya rhfl4913esy2505v 5962f0253402vzc rhfl4913esy2506v 5962f0253402vza rhfl4913esy3305v 5962f0253502vzc rhfl4913esy3306v 5962f0253502vza rhfl4913esy5005v 5962f0253602vzc rhfl4913esy5006v 5962f0253602vza l491325die2v 5962f0253402v9a l491333die2v 5962f0253502v9a l491350die2v 5962f0253602v9a
rhfl4913 fixed version 5/13 table 6: environmental characteristics table 7: electrical characteristics (t j = 25c, v i =v o +2.5v, c i =c o =1 f, unless otherwise specified) parameter conditions typical unit output voltage thermal drift -55c to 125c 40 ppm/c output voltage radiation drift from 0 krad to 300 krad at 0.55rad/sec 8 ppm/krad output voltage radiation drift from 0 krad to 300 krad, mil 1019.6 6 ppm/krad symbol parameter test conditions min. typ. max. unit v i operating input voltage i o = 2a (flat-16) or 3a (smd.5 & to-257) 12 v v o output voltage accuracy v i = v o +2.5v, i o = 5ma -2 2 % i short output current limit (*) adjustable by mask/external resistor 4.5 a v o operating output voltage i o = 2 a, 2.5 v output voltage 2.45 2.55 v v o operating output voltage i o = 2 a, 3.3 v output voltage 3.23 3.37 v v o operating output voltage i o = 2 a, 5.0 v output voltage 4.9 5.1 v ? v o / ? v i line regulation v i = v o +2.5v to 12 v, i o = 5ma (+25c) 0.3 % v i = v o +2.5v to 12 v, i o = 5ma (-55c) 0.4 % v i = v o +2.5v to 12 v, i o = 5ma (+125c) 0.4 % ? v o / ? v o load regulation v i = v o +2.5v, i o = 5ma to 400 ma (+25c) 0.2 % v i = v o +2.5v, i o = 5ma to 400 ma (-55c) 0.3 % v i = v o +2.5v, i o = 5ma to 400 ma (+125c) 0.3 % v i = v o +2.5v, i o = 5ma to 1a (+25c) 0.3 % v i = v o +2.5v, i o = 5ma to 1a (-55c) 0.4 % v i = v o +2.5v, i o = 5ma to 1a (+125c) 0.4 % z out output impedance i o = 100 ma dc and 20 ma rms 100 m ? i q quiescent current v i = v o +2.5v, i o = 30ma on mode 8 ma v i = v o +2.5v, i o = 300ma on mode 25 v i = v o +2.5v, i o = 1a on mode 60 v i = v o +2.5v, i o = 3a on mode (only for smd.5 and to-257) 150 v i = v o +2v, v inh = 2.4v off mode 1 i q quiescent current v i =v o +2.5v, i o = 1a, t j =+125 con mode 40 ma v i =v o +2.5v, i o = 1a, t j =-55 con mode 100 v d dropout voltage i o = 400ma t j = -55c 300 400 mv i o = 400ma t j = +25c 350 450 i o = 400ma t j = +125c 450 550 i o = 1a t j = -55c 550 i o = 1a t j = +25c 650 i o = 1a t j = +125c 800 i o = 2a t j = +25c 750 i o = 2a t j = +125c 950 v inh(on) inhibit voltage i o = 5ma, t j = -55 to 125 c 0.8 v v inh(off) inhibit voltage i o = 5ma, t j = -55 to 125 c 2.4 v svr supply voltage rejection (*) v i = v o +2.5v 1v, i o = 5ma f = 120hz 60 70 db f = 33khz 30 40
rhfl4913 fixed version 6/13 (*) this value is guaranteed by design. for each application it?s strongly recommended to comply with the maximum current limit of the pack- age used. figure 4: application diagram for remote sensing operation device description the rhfl4913 fixed voltage contains a pnp type power element controlled by a signal resulting from amplified comparison between the internal temperature compensated band-gap cell and the fraction of the desired output voltage value. this fractional value is obtained from an internal-to-die resistor divider bridge set by stmicroelectronics. the device is protected by several functional blocks. low pin count package limitations some functions (inhibit, ocm, sense) are not available due to lack of pins. corresponding die pads are by default connected inside silicon. sense pin the load voltage is applied by a kelvin line connected to sense pin: voltage feed-back comes from the internal divider resistor bridge. therefore possible output voltages are set by manufacturer mask metal options. sense pin is not available in 3pin packages. inhibit on-off control by setting inhibit pin ttl-high, the device switches off the output current and voltage. the device is on when inhibit pin is set low. since inhibit pin is internally pulled down, it can be left floating in case inhibit function is not utilized. inhibit pin is not available in 3pin packages. overtemperature protection a temperature detector internally monitors the power element junction temperature. the device goes off at approx. 175c, returning to on mode when back to approx. 40c. it is worth noting that when the internal temperature detector reaches 175c, the active power element can be at 225c: device reliability cannot be granted in case of extensive operation under these conditions. i sh shutdown input current v inh = 5 v 15 a v ocm ocm pin voltage sinked i ocm = 24 ma active low 0.38 v t plh t phl inhibit propagation delay (*) v i = v o +2.5v, v inh = 2.4 v, i o = 400 ma on-of f 20 s off-o n 100 s en output noise voltage (*) b= 10hz to 100khz i o = 5ma to 2a 40 vrms symbol parameter test conditions min. typ. max. unit
rhfl4913 fixed version 7/13 overcurrent protection i sc pin. an internal non-fold back short-circuit limitation is set with i short > 3.8a (v o is 0v). this value can be reduced by an external resistor connected between i sc pin and v i pin, with a typical value range of 10k ? to 200k ? . this adjustment feature is not available in 3pin packages. to keep excellent v o regulation, it is necessary to set i short 1.6 times greater than the maximum desired application i o . when i o reaches i short ? 300ma, the current limiter overrules regulation and v o starts to drop and the ocm flag is risen. when no current limitation adjustment is required, i sc pin must be left unbiased (as it is in 3 pin packages). ocm pin goes low when current limiter starts to be active, otherwise v ocm = v i . it is bufferized and can sink 10ma. ocm pin is internally pulled-up by a 5 k ? resistor. not available in 3pin packages. alternate to rhfl4913 fixed (& custom) voltages replace all 3-terminal industry devices, providing essential benefits - lower drop-out - high radiation performance - better svr - saving the high stability external setting resistors. application information the rhfl4913 fixed voltage is functional as soon as v i -v o voltage difference is slightly above the power element saturation voltage. a minimum 0.5ma i o ensures perfect ?no-load? regulation. all available v i pins must always be externally interconnected, same thing for all available v o pins, otherwise device stability and reliability cannot be granted. all nc pins can be connected to ground. the inhibit function switches off the output current in an electronic way, that is very quickly. according to lenz?s law, external circuitry reacts with ?ldi/dt terms which can be of high amplitude in case some series-inductance exists. the effect would be a large transient voltage developed on both device terminals. it is necessary to protect the device with schottky diodes preventing negative voltage excursions. in the worst case, a 14v zener diode shall protect the device input. the device has been designed for high stability and low drop out operation: minimum 1f input and output tantalum capacitors are therefore mandatory. capacitor esr range is from 0.5 ? to over 20 ? . such range turns out to be useful when esr increases at low temperature. when large transient currents are expected, larger value capacitors are necessary. in case of high current operation with expected short-circuit events, caution must be considered relatively to capacitors. they must be connected as close as possible to device terminals. as some tantalum capacitors may permanently fail when submitted to high charge-up surge currents, it is recommended to decouple them with 470nf polyester capacitors. being rhfl4913 fixed voltage manufactured with very high speed bipolar technology 6ghz f t transistors), the pcb lay-out must be performed with extreme care, very low inductance, low mutually coupling lines, otherwise high frequency parasitic signals may be picked-up by the device resulting into self-oscillation. user?s benefit is a svr performance extended to far higher frequencies. remote sensing operation in case the load is located far from the regulator, it is recommended to comply with the scheme below. to obtain the best regulation, it is in addition essential to care about: - the wire connecting r2 to the load end must not be crossed by the load current (kelvin sense). the noise captured by the wires between the load and the chip could bring a noisy output voltage. in case this happens, it is recommended that shielded cables are used for these connections. the external wrap must be used for connecting the ground of the chip with the load ground. it is also recommended to place 1uf tantalum capacitors between output and ground close to the device and another next to the load.
rhfl4913 fixed version 8/13 notes about flat-16 package: the bottom of package is metallized to allow user to directly solder the voltage regulator to the equipment heater, in order to optimize heat removal performance. radiation performances the rhfl4913f has been tested against: 300krad tid elders in accordance with mil-1019.6, bipolar section: post radiation parameters are within datasheet pre rad limits. submitted to 200mev iodine ions of 60.4mev/cm 2 /mg let up to 1exp(+7) ions / cm 2 , no sel event has been detected. die information rhfl4913 fixed is also available in die form. space dice are electrically tested by stmicroelectronics in such a way that, when mounted in proper thermal and electrical substrate, they provide full compliance with equivalent packaged product. - max die dimensions: 2.794mm by 3.861mm or 110 mils by 152 mils - die thickness: 357m +/- 50m - pad size: 184m by 184m - metallization: aluminum 4% silicon alloy - die backside: bare s ilicon - die backside potential: ground figure 5: die size (*) die sense pad is active in rhfl4913fixed die. it shall not be left unbonded. it should be bonded to v o pin. (**) die adjust pad is available in the die lay-out but is not electrically connected to the ic. it shall be left unconnected d uring hybrid bonding.
rhfl4913 fixed version 9/13 dim. mm. inch min. typ max. min. typ. max. a 2.16 2.72 0.085 0.107 b 0.43 0.017 c 0.13 0.005 d 9.91 0.390 e 6.91 0.272 e2 4.32 0.170 e3 0.76 0.030 e 1.27 0.050 l 6.72 0.265 q 0.66 1.14 0.026 0.045 s1 0.13 0.005 flat-16 (mil-std-1835) mechanical data 7450901a 18 16 e b c l e d s1 q a e2 e3 l e3 9
rhfl4913 fixed version 10/13 dim. mm. inch min. typ max. min. typ. max. a 3.00 0.118 a1 0.38 0.015 b 7.26 0.286 b1 5.72 0.225 b2 2.41 0.095 b3 3.05 0.120 d 10.16 0.400 d1 0.76 0.030 e 7.52 0.296 e 1.91 0.075 smd.5 mechanical data 7386434a
rhfl4913 fixed version 11/13 dim. mm. inch min. typ max. min. typ. max. a 10.54 0.415 b 10.54 0.415 c 16.64 0.655 d 4.7 5.33 0.185 0.210 e 1.02 0.40 f 3.56 3.68 3.81 0.140 0.145 0.150 g 13.51 0.532 h 5.26 0.207 i 0.76 0.030 j 3.05 0.120 k 2.54 0.100 l 15.2 16.5 0.598 0.650 m 2.29 0.090 n 0.71 0.028 r 1.65 0.065 to-257 mechanical data 0117268c
rhfl4913 fixed version 12/13 table 8: revision history date revision description of changes 05-may-2004 4 mistake in pin description smd.5 on table 3. 28-oct-2004 5 new order codes added - tables 4 and 5. 27-may-2005 6 the features, tables 4, 5 and the figures 1, 2 has been updated. 08-jun-2005 7 the p d on table 1, the r thj-case for to-257 on table 2 and the tables 6, 7 has been updated, add die information.
rhfl4913 fixed version 13/13 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2005 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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