4707 dey road liverpool, n.y. 13088 m.s.kennedy corp. (315) 701-6751 features: dual low dropout voltage internal short circuit current limit output voltages are internally set to 1% max electrically isolated case internal thermal overload protection many output voltage combinations alternate package and lead form configurations available high efficiency linear regulators constant voltage/current regulators system power supplies switching power supply post regulators typical applications pin-out information 1 2 3 4 5 +vin +vout gnd -vin -vout 5000 series dual positive/negative, 3 amp, low dropout fixed voltage regulators description: the msk 5000 series offers 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 occupying 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. equivalent schematic mil-prf-38534 certified 1 rev. h 11/07
part number positive output regulators: output voltage tolerance dropout voltage load regulation line regulation quiescent current short circuit current ripple rejection thermal resistance negative output regulators: output voltage tolerance dropout voltage load regulation line regulation quiescent current short circuit current ripple rejection thermal resistance max. 1.0 2.0 1.5 1 2 0.5 .75 15 - - 4.5 1.0 2.0 1.2 1 2 .5 .75 10 - - 4.7 storage temperature range lead temperature range (10 seconds) case operating temperature msk 5000-5009 msk 5000b/e-5009b/e 30v internally limited 3a +175c -65c to +150c 300c -40c to +85c -55c to +125c absolute maximum ratings t st t ld t c input voltage (wrt v out ) power dissipation output current junction temperature v in p d i out t j outputs are decoupled to ground using 33f minimum low esr capacitors unless otherwise specified. guaranteed by design but not 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 and "e" suffix devices shall be tested to subgroup 1 unless otherwise specified. military grade devices ("h" suffix) shall be 100% tested to subgroups 1,2 and 3. subgroup 1 t a =t c =+25c subgroup 2 t a =t c =+125c subgroup 3 t a =t c =-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 . continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle. 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 - - - min. - - - - - - - - 3.2 60 - - - - - - - - - 3.3 60 - typ. 0.1 0.1 1.3 0.2 0.3 0.1 0.2 10 4 75 4.3 0.1 0.1 0.8 0.2 0.3 .1 .2 4.5 3.6 75 4.5 typ. 0.1 - 1.3 0.2 - 0.1 - 10 4 75 4.3 0.1 - 0.8 0.2 - .1 - 4.5 3.6 75 4.5 max. 2.0 - 1.6 2 - 0.6 - 15 - - 4.6 2.0 - 1.3 2 - .6 - 10 - - 4.8 parameter electrical specifications test conditions units msk 5000 series msk 5000b/e series 3 2 2 2 2 i out =0a; v in =v out +3v 0a i out 3a; d v out =50mv 100ma i out 3a v in =v out +3v i out =0a (v out +3v) v in (v out +15v) v in =v out +3v; i out =0a v in =v out +5v i out =3a; c out =25f; f=120hz junction to case @ tc=125c i out =0a; v in =v out +3v 0a i out 3a; d v out =50mv v in =v out +3v 100ma i out 3a i out =0a (v out +3v) v in (v out +15v) v in =v out +3v; i out =0a v in =v out +5v i out =3a; c out =25f; f=120hz junction to case @ tc=125c % % v % % % % ma a db c/w % % v % % % % ma a db c/w +3.3v +5.0v +5.0v +12.0v +12.0v +15.0v +15.0v +5.0v +5.0v +10.0v msk5000 msk5001 msk5002 msk5003 msk5004 msk5005 msk5006 msk5007 msk5008 msk5009 -5.2v -5.0v -5.2v -5.0v -12.0v -15.0v -5.0v -12.0v -15.0v -10.0v 8 output voltages positive negative 7 2 2 rev. h 11/07 1 2 3 4 5 6 7 8 9 2 notes: 2 2 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 govern- ing 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 jc = 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 occurs when the output currents are at 1.5 amps each. conditions for msk 5002: 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) = 3.0w 3.) for conservative design, set tj = +125c max. 4.) for this example, worst case ta = +90c. 5.) r q jc = 4.5c/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 - 4.5c/w - 0.15c/w = 7.0c/w the same exercise must be performed for the negative regula- tor. in this case the result is 7.0c/w. therefore, a heat sink with a thermal resistance of no more than 7.0c/w must be used in this application to maintain both regulator circuit junc- tion temperatures under 125c. overload shutdown the regulators feature both power and thermal overload pro- tection. when the maximum power dissipation is not exceeded, the regulators will current limit slightly above their 3 amp rating. as the vin-vout voltage increases, however, shutdown occurs in relation to the maximum power dissipation curve. if the device heats enough to exceed its rated die junction temperature due to excessive ambient temperature, improper heat sinking etc., the regulators also shutdown until an appropriate junction tempera- ture 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 con- dition. 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 directly affects the load regulation. for example, if 20 gauge wire were used 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 dia- gram. figure 2 avoiding ground loops bypass capacitors for most applications a 33uf minimum, low esr (0.5-2 ohm) tantalum capacitor should be attached as close to the regulator's output as possible. this will effectively lower the regulator's output impedance, increase transient response and eliminate any oscillations that are normally associated with low dropout regu- lators. 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 low esr (0.5-2 ohm) tantalum capacitor should also be added to the regulator's input. 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 5002 typical application: figure 1 3 rev. h 11/07
typical performance curves 4 rev. h 11/07
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. please visit our website for the most recent revision of this datasheet. mechanical specifications m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com 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; e=extended reliability b=mil-prf-38534 class h general part number (voltage) msk5000 b t u the above example is a +3.3v, -5.2v military regulator using the top tab package with leads bent up. 5 note: esd triangle indicates pin 1. rev. h 11/07 weight = 7.7 grams typical weight = 7.5 grams typical
|
