4707 dey road liverpool, n.y. 13088 m.s.kennedy corp. (315) 701-6751 features: ultra low dropout voltage internal short circuit current limit output voltages are internally set to 1% maximum electrically isolated case internal thermal overload protection many output voltage combinations alternate package and lead form configurations available typical applications pin-out information 1 2 3 4 5 +vin +vout gnd -vin -vout 5200 series dual positive/negative, 3 amp, ultra low dropout fixed voltage regulators description: the msk 5200 series offers ultra low dropout voltages on both the positive and negative regulators. this, combined with the low q jc , allows increased output current while providing exceptional device efficiency. because of the increased efficiency, a small hermetic 5 pin package can be used providing maximum performance while occupy- ing minimal board space. output voltages are internally trimmed to 1% maximum resulting in consistent and accurate operation. additionally, both regulators offer internal short circuit current and thermal limiting, which allows circuit protection and eliminates the need for external components and excessive derating. iso-9001 certified by dscc equivalent schematic mil-prf-38534 qualified high efficiency linear regulators constant voltage/current regulators system power supplies switching power supply post regulators 1 rev. c 7/00
1 2 3 4 5 6 7 8 9 outputs are decoupled to ground using 20f minimum tantalum capacitors unless otherwise specified. this parameter is guaranteed by design but need not be tested. typical parameters are representative of actual device performance but are for reference only. all output parameters are tested using a low duty cycle pulse to maintain t j = t c . industrial grade devices shall be tested to subgroups 1 and 4 unless otherwise specified. military grade devices ('h' suffix) 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 j = +125c subgroup 3,6 t a = -55c please consult the factory if alternate output voltages are required. input voltage (v in = v out + a specified voltage) is implied to be more negative than v out . v in =v out +1v i out =0a i out = 2a; d v out =-1% 100ma i out 3a v in =v out +1v i out =0a (v out +1v) v in (26v) v in =v out +1v; i out =0a v in =v out +1v i out =3a; c out =25f; f=120hz junction to case v in =v out +1.5v i out = oa i out = 2a; d v out =-1% v in =v out +1.5v 100ma i out 3a i out =0a (v out +1.5v) v in (26v) v in =v out +1.5v; i out =0a v in =v out +1v i out =3a; c out =25f; f=120hz junction to case storage temperature range lead temperature range (10 seconds) case operating temperature msk5200-5210 msk5200h-5210h 26v internally limited 3.5a +175c -65c to +150c 300c -40c to +125c -55c to +125c absolute maximum ratings t st t ld t c input voltage power dissipation output current junction temperature v in p d i out t j positive output regulators: output voltage tolerance dropout voltage load regulation line regulation quiescent current short circuit current ripple rejection thermal resistance negative output regula- tors: output voltage tolerance dropout voltage load regulation line regulation quiescent current short circuit current ripple rejection thermal resistance notes: min. - - - - - - - - 3.0 60 - - - - - - - - - 3.0 60 - group a subgroup 1 2,3 1 1 2,3 1 2,3 1,2,3 - - - 1 2,3 1 1 2,3 1 2,3 1,2,3 - - - typ. 0.5 1.0 350 0.2 0.3 0.1 0.5 10 4.5 75 2.5 0.1 0.1 550 0.3 0.5 0.1 0.5 4.5 3.6 75 2.0 typ. 0.5 1.0 350 0.2 0.3 0.1 0.5 10 4.5 75 2.5 0.1 - 550 0.3 0.5 0.1 0.5 4.5 3.6 75 2.0 parameter electrical specifications test conditions units msk 5200 series msk 5200(h) series 1 2 2 2 2 2 % % mv % % % % ma a db c/w % % mv % % % % ma a db c/w 2 3 2 2 2 rev. c 7/00 min. - - - - - - - - 3.2 60 - - - - - - - - - 3.2 60 - max. 1.0 2.0 600 1.0 2.0 0.5 1.0 15 5.0 - 2.8 1.0 2.0 700 1.5 2.5 0.5 1.0 10 5.0 - 2.4 max. 1.5 - 625 1.2 - 0.6 - 15 5.0 - 2.8 2.0 - 750 1.7 - 0.6 - 10 5.0 - 2.4 -5.2v -5.0v -5.2v -5.0v -12.0v -15.0v -5.0v -12.0v -15.0v -10.0v -5.2v part number output voltages +3.3v +5.0v +5.0v +12.0v +12.0v +15.0v +15.0v +5.0v +5.0v +10.0v +5.2v msk 5200(h) msk 5201(h) msk 5202(h) msk 5203(h) msk 5204(h) msk 5205(h) msk 5206(h) msk 5207(h) msk 5208(h) msk 5209(h) msk 5210(h) 8 negative positive 9
application notes heat sinking: to determine if a heat sink is required for your application and if so, what type, refer to the thermal model and governing equation below. governing equation: tj = pd x (r q jc + r q cs + r q sa) + ta where tj = junction temperature pd = total power dissipation r q j = junction to case thermal resistance r q cs = case to heat sink thermal resistance r q sa = heat sink to ambient thermal resistance tc = case temperature ta = ambient temperature ts = heat sink temperature example: this example demonstrates an analysis where each regulator is at one-half of its maximum rated power dissipation, which oc- curs when the output currents are at 1.5 amps each. conditions for msk 5202: vin = 7.0v; iout = 1.5a 1.) assume 45 heat spreading model. 2.) find positive regulator power dissipation: pd = (vin - vout)(iout) pd = (7-5)(1.5) pd = 3.0w 3.) for conservative design, set tj = +125c max. 4.) for this example, worst case ta = +90c. 5.) r q jc = 2.5c/w from the electrical specification table. 6.) r q cs = 0.15c/w for most thermal greases. 7.) rearrange governing equation to solve for r q sa: r q sa= ((tj - ta)/pd) - (r q jc) - (r q cs) = (125c - 90c)/3.0w - (2.5c/w) - ( 0.15c/w) = 9.15c/w the same exercise must be performed for the negative regula- tor. in this case the result is 9.15c/w. therefore, a heat sink with a thermal resistance of no more than 9.1c/w must be used in this application to maintain both regulator circuit junc- tion temperatures under 125c. overload shutdown: the regulators feature both current and thermal overload protection. when the maximum power dissipation is not ex- ceeded, the regulators will current limit slightly above their 3 amp rating. as the vin-vout voltage increases, however, shut- down occurs in relation to the maximum power dissipation curve. if the device heats enough to exceed its rated die junction tem- perature due to excessive ambient temperature, improper heat sinking etc., the regulators also shutdown until an appropriate junction temperature is maintained. it should also be noted that in the case of an extreme overload, such as a sustained direct short, the device may not be able to recover. in these instances, the device must be shut off and power reapplied to eliminate the shutdown condition. load regulation: for best results the ground pin should be connected directly to the load as shown below. this effectively reduces the ground loop effect and eliminates excessive voltage drop in the sense leg. it is also important to keep the output connection between the regulator and the load as short as possible since this di- rectly affects the load regulation. if 20 gauge wire were used as an example, which has a resistance of about .008 ohms per foot, this would result in a drop of 8mv/ft at 1amp of load current. it is also important to follow the capacitor selection guidelines to achieve best performance. refer to figure 2 for connection diagram. figure 2 avoiding ground loops bypass capacitors: for most applications a 20uf, tantalum capacitor should be attached as close to the regulator's output as possible. this will effectively lower the regulator's output impedance, improve transient response and eliminate any oscillations that may be normally associated with low dropout regulators. additional bypass capacitors can be used at the remote load locations to further improve regulation. these can be either of the tantalum or the electrolytic variety. unless the regulator is located very close to the power supply filter capacitor(s), a 4.7uf minimum tantalum capacitor should also be added to the regulator's in- put. an electrolytic may also be substituted if desired. when substituting electrolytic in place of tantalum capacitors, a good rule of thumb to follow is to increase the size of the electrolytic by a factor of 10 over the tantalum value. low dropout positive and negative power supply msk 5202 typical application: figure 1 3 rev. c 7/00
typical performance curves 4 rev. c 7/00
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. mechanical specifications m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com esd triangle indicates pin 1. note: all dimensions are 0.010 inches unless otherwise labeled ordering information lead configurations s= straight; u= bent up; d= bent down package style t= top tab; z= z pack screening blank= industrial; h= mil-prf-38534 general part number (voltage) msk5200 h t u the above example is a: +3.3v, -5.2v military screened regulator using the top tab package with leads bent up. 5 rev. c 7/00
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