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january 2007 rev. 7 1/16 16 rhfl4913 adjustable rad-hard adjustable positive voltage regulator features 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: guaranteed up to 300krad in mil 1019.6 high dose rate and 0.01rad/sec eldrs 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 adjustable positive voltage regulator providing exceptional radiation performances, tested in accordance with mil std 1019.6 eldrs conditions. available in flat-16 and new smd5c hermetic ceramic packages and as qmlv-die, it is specifically intended for space and harsh radiation environments. input supply range is up to 12 volts. the rhfl4913 adjustable is qml-v qualified, dscc smd is 5962f02524. www.st.com flat-16 smd5c: 5 connections smd block diagram
contents rhfl4913 adjustable version 2/16 contents 1 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.1 adj pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2 inhibit on-off control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.3 overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.4 overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.5 ocm pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.6 alternates to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.1 notes about 16pin hermetic package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.2 remote sensing operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 die information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.1 die bonding pad locations and electrical functions. . . . . . . . . . . . . . . . . . . . 10 7 packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8 order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
rhfl4913 adjustable version pin configuration 3/16 1 pin configuration figure 1. pin configuration (top view for flat-16, bottom view for smd5c) table 1. pin description pin name flat-16 smd5c v o 1, 2, 6, 7 1 v i 3, 4, 5 2 gnd 13 5 i sc 8 ocm 10 inhibit 14 4 adj 15 3 nc 9, 11, 12, 16 smd5c flat-16
maximum ratings rhfl4913 adjustable version 4/16 2 maximum ratings note: exceeding maximum ratings may damage the device. table 2. recommended maximum operating ratings (note) symbol parameter value unit v i dc input voltage, v i - v ground 12 v v o dc output voltage range 1.23 to 9 v i o output current, rhfl4913kpa 2 a i o output current, rhfl4913sca 3 p d t c = 25c power dissipation 15 w 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 table 3. thermal data symbol parameter value unit r thjc thermal resistance junction-case, 16pin flat and smd5c 8.3 c/w t sold maximum soldering temperature, 10sec. 300 c
rhfl4913 adjustable version electrical characteristics 5/16 3 electrical characteristics table 4. electrical characteristics (t j = 25c, v i = v o +2.5v, c i = c o = 1f, unless otherwise specified) symbol parameter test conditions min. typ. max. unit v i operating input voltage i o = 1a, t j = -55 to 125 c 312v v o operating output voltage i o = 1a and or 2, v o = 1.23 v 1.19 1.27 v i o = 1a and or 2, v o = 9 v 8.7 9.3 v i short output current limit (1) adjustable by mask/external resistor 1 4.5 a ? v o / ? v i line regulation v i = v o +2.5v to 12 v, i o = 5ma, t j =+25 c 0.35 % v i = v o +2.5v to 12 v, i o = 5ma, t j =-55 c 0.4 v i = v o +2.5v to 12 v, i o = 5ma, t j =+125 c 0.4 ? v o / ? v o load regulation v i = v o +2.5v, i o = 5 to 400 ma, t j =+25 c 0.3 % v i = v o +2.5v, i o = 5 to 400 ma, t j =-55 c 0.5 v i = v o +2.5v, i o = 5 to 400 ma, t j =+125 c 0.5 v i = v o +2.5v, i o = 5ma to 1a, t j =+25 c 0.5 v i = v o +2.5v, i o = 5ma to 1a, t j =-55 c 0.6 v i = v o +2.5v, i o = 5ma to 1a, t j =+125 c 0.6 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 (+25 c) 6 ma v i = v o +2.5v, i o = 30ma, on mode (+25 c) 8 v i = v o +2.5v, i o = 300ma, on mode (+25 c) 25 v i = v o +2.5v, i o = 1a, on mode (+25 c) 60 v i = v o +2v, v inh = 2.4voff mode 1 i q quiescent current on mode v i = v o +2.5v, i o = 30ma, (-55c) 14 ma v i = v o +2.5v, i o = 300ma, (-55c) 40 v i = v o +2.5v, i o = 1a, (-55c) 100 v i = v o +2.5v, i o = 30ma, (+125c) 8 v i = v o +2.5v, i o = 300ma, (+125c) 20 v i = v o +2.5v, i o = 1a, (+125c) 40
electrical characteristics rhfl4913 adjustable version 6/16 figure 2. application diagram for remote sensing operation v d dropout voltage i o = 400ma, v o = 2.5 to 9 v, (+25c) 350 450 mv i o = 400ma, v o = 2.5 to 9 v, (-55c) 300 400 i o = 400ma, v o = 2.5 to 9 v, (+125c) 450 550 i o = 1a, v o = 2.5 to 9 v, (+25c) 650 i o = 1a, v o = 2.5 to 9 v, (-55c) 550 i o = 1a, v o = 2.5 to 9 v, (+125c) 800 i o = 2a, v o = 2.5 to 9 v, (+25c) 900 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 svr supply voltage rejection (1) v i = v o +2.5v 0.5v, v o = 3v i o = 5ma f = 120hz 60 70 db f = 33khz 30 40 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 (1) v i = v o +2.5v, v inh = 2.4 v, i o = 400 ma v o = 3v on-off 20 s off-on 100 s en output noise voltage (1) b= 10hz to 100khz, i o = 5ma to 2a 40 vrms 1. these values are guaranteed by design. for each application it?s strongly recommended to comply with the maximum current limit of the package used. table 4. electrical characteristics (t j = 25c, v i = v o +2.5v, c i = c o = 1f, unless otherwise specified) symbol parameter test conditions min. typ. max. unit
rhfl4913 adjustable version device description 7/16 4 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. 4.1 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. 4.2 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. 4.3 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. 4.4 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 downward modified by an external resistor connected between i sc and v i pins, 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 . when i o reaches i short ? 300ma, the current limitor overrules regulation and v o starts to drop and ocm flag is risen. when no current limitation adjustment is required, i sc pin must be left unbiased (as it is in 3pin packages). 4.5 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. 4.6 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.
application information rhfl4913 adjustable version 8/16 5 application information adjusting output voltage: r2 resistor must be connected between v o and adj pins. r1 resistor must be connected between adj and ground. resistor values can be derived from the following formula: v o = v adj (r1+ r2) / r1 v adj is 1.23v, 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. 5.1 notes about 16pin hermetic package the bottom section of 16pin packages is metallized in order to allow user to directly solder the rhfl4913a on the equipment heat sink for enhanced heat removal. 5.2 remote sensing operation see figure 2. a separate kelvin voltage sensing line provides adj pin with exact load "high potential" information. but variable remote load current consumption induces variable iq current (iq is roughly the i o current divided by the h fe of the internal pnp series power element) routed through parasitic series line resistor symbolized as rw2. to compensate this parasitic voltage, the resistor rw1 introduced on purpose provides the necessary compensating voltage signal to adjust pin.
rhfl4913 adjustable version die information 9/16 6 die information note: pad numbers reflect terminal numbers when placed in case flat 16. figure 3. die map gnd 0 ; 1002 13 inbh -1542 ; 868 adj -1545 ; 574 sense -1545 ; 287 v o -890 ; -974 v i 0 ; -974 v o 970 ; -974 ocm 1517 ; 5 short 1517 ; 2 14 15 16 1-2 3-4-5 6-7 10 8
die information rhfl4913 adjustable version 10/16 6.1 die bonding pad locations and electrical functions. die physical dimensions. die size: 150mils x 110mils (3.81mm by 2.79mm) die thickness: 375m 25m (14.8 mils 1 mil) pad size: v in , v out pads: 450m x 330m (17.7mils by 13mils) control pads: 184m x 184m (7.25mils square) interface materials. top metallization: al/si/cu, 1.05m 0.15m backside metallization: none glassivation. type: p. vapox + nitride thickness: 0.6m 0.1m + 0.6m 0.08m substrate: bare silicon assembly related information. substrate potential: floating recommended to be tied to ground special assembly instructions: "sense" pad not used, not internally connected to any part of the ic. can be connected to ground when space anti-static electricity rules apply.
rhfl4913 adjustable version die information 11/16 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
die information rhfl4913 adjustable version 12/16 dim. mm. inch min. typ max. min. typ. max. a 2.84 3.00 3.15 0.112 0.118 0.124 a1 0.25 0.38 0.51 0.010 0.015 0.020 b 7.13 7.26 7.39 0.281 0.286 0.291 b1 4.95 5.08 5.21 0.195 0.200 0.205 b2 2.28 2.41 2.54 0.090 0.095 0.100 b3 2.92 3.05 3.18 0.115 0.120 0.125 d 13.71 13.84 13.97 0.540 0.545 0.550 d1 0.76 0.030 e 7.39 7.52 7.65 0.291 0.296 0.301 e 1.91 0.075 smd5c mechanical data 7924296b
rhfl4913 adjustable version packaging 13/16 7 packaging rhfl4913 adjustable is available in high thermal dissipation 16pin hermetic flat package, which bottom flange is metallized to allow direct soldering to heat sink (efficient thermal conductivity). it is also available in smd5c hermetic ceramic package.
order code rhfl4913 adjustable version 14/16 8 order code table 5. order code die flat-16 smd5c terminal finish out. volt. q.ty level rhfl4913kpa-01v rhfl4913sca-01v gold adj qml-v RHFL4913KPA-02V solder adj qml-v rhfl4913kpa1 rhfl4913sca1 gold adj em1 rhfl4913kpa2 rhfl4913sca2 gold adj em2=em1+48hours b.i. l4913adie2v adj qml-v die l4913adies adj em1 die table 6. part number - smd equivalence st part number smd part number rhfl4913kpa-01v 5962f0252401vxc RHFL4913KPA-02V 5962f0252401vxa l4913adie2v 5962f0252401v9a table 7. environmental characteristics parameter conditions value unit output voltage thermal drift -55c to +125c 40 ppm/c output voltage radiation drift from 0 krad to 300k rad at 0.55rad/sec 8 ppm/krad output voltage radiation drift from 0 krad to 300 krad, mil1019.5 6 ppm/krad
rhfl4913 adjustable version revision history 15/16 9 revision history table 8. revision history date revision changes 29-oct-2004 3 new order codes added - tables 4 and 5. 27-may-2005 4 the features, tables 4, 5 and the figure 1 has been updated. add the mechanical data soc-16. 08-jun-2005 5 mistake on table 4 (q.ty level), table 7 has been updated and add die information. 30-jan-2006 6 added new package smd5c and removed old package soc-16. 26-jan-2007 7 die information and die pad has been updated par. 6, pages 9 and 10.
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