1/10 february 2004 1-3 ampere low dropout voltage embedded overtemperature, overcurrent protections adjustable overcurrent limitation output overload monitoring/ signalling adjustable output voltage inhibit (on/off) ttl compatible control programmable output short circuit current remote sensing operation radhard: tested up to 300krad in mil 1019.5 and low dose rate conditions heavy ions sel, seu immune. sustains 2x10 14 proton/cm 2 , and 2x10 14 neutron/cm 2 description the rhfl4913 adjustable is a high performance rad hard adjustable positive voltage regulator. available into various hermetic ceramic packages, it is specifically intended for space and harsh radiation environments. input supply range is from 3to12volts. the rhfl4913 adjustable is qml-v qualified, dscc smd is 596202524. rhfl4913 adjustable rad-hard adjustable positive voltage regulator block diagram soc-14 fpc-16 fpc-14
rhfl4913 adjustable version 2/10 absolute maximum ratings (note 1) note 1: exceeding maximum ratings may damage the device. thermal data connection diagram (top view) symbol parameter value unit v i dc input voltage, v i -v ground 14 v v o dc output voltage range 1.3to9 v i o output current rhfl4913ksoa, ka 1 a rhfl4913kpa 2 p d t c = 25c power dissipation ksoa, ka versions (14 pin) 3 w kpa, versions (16 pin) 15 t stg storage temperature range -65 to +150 c t op operating junction temperature range -55 to +150 c esd electrostatic discharge capability class 3 symbol parameter fpc-14 soc-14 fpc-16 unit r thj-case thermal resistance junction-case max 42 42 8.3 c/w t sold maximum soldering temperature, 10sec. 300 c soc-14 fpc-16 fpc-14
rhfl4913 adjustable version 3/10 pin description ordering codes part number - smd equivalence environmental characteristics pin n fpc-16 fpc-14 soc-14 v o 1, 2, 6, 7 2, 6 2, 6 v i 3, 4, 5 3, 5 3, 5 gnd131212 i sc 877 ocm 10 8 8 inhibit141313 adj151414 nc 9, 11, 12, 16 1, 4, 9, 10, 11 1, 4, 9, 10, 11 fpc-14 fpc-16 soc-14 solder dipping output voltage rhfl4913ka-05v RHFL4913KPA-01V rhfl4913soa-03v gold adj rhfl4913ka-06v rhfl4913kpa-02v rhfl4913soa-04v solder adj st part number smd part number RHFL4913KPA-01V 5962f0252401vxc rhfl4913kpa-02v 5962f0252401vxa rhfl4913soa-03v 5962f0252402vyc rhfl4913soa-04v 5962f0252402vya rhfl4913ka-05v 5962f0252402vzc rhfl4913ka-06v 5962f0252402vza 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 1019.5 6 ppm/krad
rhfl4913 adjustable version 4/10 electrical characteristics (t j =25c,v i =v o +2.5v, c i =c o =1 f, unless otherwise specified) (*) 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. symbol parameter test conditions min. typ. max. unit v i operating input voltage i o =1a t j = -55 to 125 c 312v v adj adjust pin voltage v i ,v o ,i o ,p d within max rating limits 1.19 1.27 % i short output current limit (*) adjustable by mask/external resistor 4.5 a ? v o / ? v i line regulation v i =v o +2.5v to 12 v, i o = 5ma 0.35 % ? v o / ? v o load regulation v i =v o +2.5v, i o = 5ma to 400 ma 0.3 % v i =v o +2.5v, i o =5mato1a 0.5 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 = 5ma on mode 6 ma v i =v o +2.5v, i o = 30ma on mode 8 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 +2v, v inh = 2.4v off mode 1 i q quiescent current v i =v o +2.5v, i o = 5ma, t j =-55 to 125c 6 ma v i =v o +2.5v, i o = 30ma, t j =-55 to 125c 14 v i =v o +2.5v, i o = 300ma, t j =-55 to 125c 40 v i =v o +2.5v, i o = 1a, t j =-55 to 125c 100 v d dropout voltage i o = 400ma v o = 2.5 to 9 v, (-55c) 300 400 v i o = 400ma v o = 2.5 to 9 v, (25c) 350 450 i o =1a v o = 2.5 to 9 v, (25c) 650 i o =2a v o = 2.5 to 9 v, (25c) 900 i o = 400ma v o = 2.5 to 9 v, (125c) 450 550 i o =1a v o = 2.5 to 9 v, (125c) 800 i o =2a v o = 2.5 to 9 v, (125c) 950 v inh(on) inhibit voltage i o =5ma,t j =-55 to 125c 0.8 v v inh(off) inhibit voltage i o =5ma,t j =-55 to 125c 2.4 v svr supply voltage rejection v i =v o +2.5v 0.5v, i o = 5ma f = 120hz 60 70 db f = 33khz 30 40 i sh shutdown input current v inh =5v 15 a v ocm ocm pin voltage sinked i ocm =10maactivelow 0.38 v t plh t phl inhibit propagation delay v i =v o +2.5v, v inh =2.4v,i o = 400 ma on-off 20 s off-on 100 s en output noise voltage b= 10hz to 100khz i o = 5ma to 2a 40 vrms
rhfl4913 adjustable version 5/10 application diagram for remote sensins operation device description the rhfl4913 adjustable contains a pnp type power element controlled by a signal resulting from amplified comparison between the internal temperature compensated band-gap and the fraction of the desired output voltage value obtained from an external resistor divider bridge. the device is protected by several functional blocks. adj pin the load output voltage feed-back comes from an external divider resistor bridge middle point connected to adj pin (allowing all possible output voltage settings as per user?s desire) established between load terminals. inhibit on-off control by setting inhibit pin ttl-high, the device switches off the output current and voltage. 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. overtemperature protection a temperature detector internally monitors the power element junction temperature. the device goes off when approx. 175c are reached, returning to on mode when back to approx. 40c. combined with other protection blocks, it protects the device from destructive junction temperature excursions in all load conditions. it is worth noting that when internal temperature detector reaches 175c, the active power element can be at 225c: extensive operation under these conditions far exceeds maximum operation ratings and device reliability cannot be granted. overcurrent protection an internal non-fold back short-circuit limitation is set with i short >3.8a (v o is 0v). this value can be downwards modified by an external resistor connected between i sc pin and v i pin, with a typical value range of 10k ? to 200k ? . to keep excellent v o regulation, it is necessary to set i short 1.6 times greater than the maximum desired application i o .wheni o reaches i short ? 300ma, the current limiter overrules regulation and v o starts to drop and ocm flag is risen. when no current limit adjustment is required, i sc pin must be left unbiased (as it is in 3pin packages). ocm pin goes low when current limit starts to be active, otherwise v ocm =v i . it is buffered and can sink 10ma. ocm pin is internally pulled-up by a 5 k ? resistor. alternates to: rhfl4913 is recommended to replace all industry positive regulators due to its exceptional radiation performance. to replace 3-terminal industry devices, use rhfl4913 fixed voltage versions.
rhfl4913 adjustable version 6/10 application information adjusting output voltage: r2 resistor must be connected between v o and adj. r1 resistor must be connected between adj and ground. resistor values can be derived from the following formula: v o =v adj x(r1+r2)/r1 v adj is 1.22v, controlled by the internal temperature compensated band gap block. the minimum output voltage is therefore 1.22v and minimum input voltage is 3v. the rhfl4913 adjustable is functional as soon as v i -v o voltage difference is slightly above the power element saturation voltage. the adjust pin to ground resistor must not be bigger than 10k ? to keep the output feed-back error below 0.2%. a minimum 0.5ma i o must be set to ensure perfect ?no-load? regulation. it is advisable to dissipate this current into the divider bridge resistor. all available v i pins shall always be externally interconnected, same thing for all available v o pins, otherwise device stability and reliability cannot be granted. 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 somewhere an inductance exists. large transient voltage would develop on both device terminals. it is advisable 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 adjust manufactured with very high speed bipolar technology (6ghz f t transistors), the pcb layout must be performed with exceptional care, very low inductance, low mutually coupling lines, otherwise high frequency parasitic signals may be picked-up by the device resulting into system self-oscillation. the benefit is an svr performance extended to far higher frequencies.
rhfl4913 adjustable version 7/10 dim. mm. inch min. typ max. min. typ. max. a 6.90 0.272 b 9.95 0.392 c 1.49 1.95 0.059 0.077 d 0.102 0.127 0.152 0.004 0.005 0.006 e 7.5 7.75 0.295 0.305 f 1.27 0.050 g 0.43 0.017 h 0.60 0.90 0.024 0.035 k 9 0.354 l 10.00 10.65 0.394 0.419 m 0.38 0.015 n 4.31 0.170 soc-14 mechanical data 0041206c e f b a note 1 g m h n k l d c
rhfl4913 adjustable version 8/10 dim. mm. inch min. typ max. min. typ. max. a 6.9 0.272 b 9.95 0.392 c 1.49 1.95 0.059 0.077 d 0.127 0.005 e 7.62 0.300 f 1.27 0.050 g 0.43 0.017 h 6.0 0.236 l 18.75 22.0 0.738 0.866 m 0.38 0.015 n 4.31 0.170 fpc-14 mechanical data 016029d 1 7 8 14 f g d h a b m n h c l e
rhfl4913 adjustable version 9/10 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 aln fpc-16 (mil-std-1835) mechanical data 7450901a 18 16 e b c l e d s1 q a e2 e3 l e3 9
rhfl4913 adjustable version 10/10 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2004 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. http://www.st.com
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