1 shanghai mingda microtronics co,ltd low quiescent curre nt low dropout md71xxh series high input30vcmos voltag e regulator 30ma the md71xxh series is a family of low dropout positive regulators.which developed by using cmos technology. these ic products perform with high output voltage accuracy, low quiescent current , low input-output dropout as built-in low on-resistance.at the same time with high input voltage capacity it can be up to 30v, suitable for applications which requires higher voltage circuit. ferture(typical) high output voltage accuracy 3 low dropout voltage 40mv low quiescent current 1.2ua low output voltage temperature drift 50 ppm / high input voltage up to 30v keeping sta ble output voltage output short circuit protection short-circuit current less than 100 ma applications battery-powered devices mobile phone devices communications equipments home electric/toy appliances portable medical equipments selection table part no. output voltage (note) tolerance md7130 3.0v 3% md7133 3.3v 3% md7136 3.6v 3% md7144 4.4v 3% md7150 5.0v 3% note: for semi_custom parts selectable output voltage from 1.5 ~7.0v in 0.1v increment. free datasheet http://
2 package and pin assignment absolute maximum ratings (ta=25 unless otherwise specified) item symbol absolute maximum ratings unit input voltage v in 30 output voltage v out v ss -0.3~ v in +0.3 v power dissipation p d sot_89 500 to_92 300 sot23 250 mw operation temperature range t opr -40~+85 storage temperature range t stg -40~+125 note: the absolute maximum ratings are rated values exceeding which t he product could suffer physical damage. these values must therefore not be exce eded under any conditions. electrical characteristics md71xxh series md7130h output voltage +3.0v ta=25 unless otherwise specified item symbol conditions min type max units test circuits output voltage v out v in = 5v i out =10ma 2.91 3.0 3.09 v 1 output current *1 i out v in= 5v 25 30 ma 3 dropout voltage *2 v drop i out =1 ma 40 60 mv line regulation v out1 v in v out 4v v in 30v i out =1ma 0.05 0.2 /v load regulation v out2 v in =5v 1.0ma i out 30ma 60 100 mv temperature coefficient v out ta v out v in =5v i out =10ma -40 ta 85 50 100 ppm/ 1 current consumption i ss1 v in =5v ? 1.2 3.0 ua 2 input voltage vin -- 30 v free datasheet http://
3 md71xxh series MD7133H output voltage +3.3v ta=25 unless otherwise specified item symbol conditions min type max units test circuits output voltage v out v in = 5.3v i out =10ma 3.201 3.3 3.399 v 1 output current *1 i out v in= 5.3v 25 30 ma 3 dropout voltage *2 v drop i out =1 ma i out =10 ma 40 60 mv line regulation v out1 v in v out 4.3v v in 24v i out =1ma 0.05 0.2 /v load regulation v out2 v in =5.3v 1.0ma i out 100ma 60 100 mv temperature coefficient v out ta v out v in =5.3v i out =10ma -40 ta 85 50 100 ppm/ 1 current consumption i ss1 v in =24v ? 1.2 3.0 ua 2 input voltage vin -- 30 v md71xxh series md7136h output voltage +3.6v ta=25 unless otherwise specified item symbol conditions min type max units test circuits output voltage v out v in = 5.6v i out =10ma 3.492 3.6 3.708 v 1 output current *1 i out v in= 5.6v 25 30 ma 3 dropout voltage *2 v drop i out =1 ma i out =10ma 40 60 mv line regulation v out1 v in v out 4.6v v in 24v i out =1ma 0.05 0.2 /v load regulation v out2 v in =5.6v 1.0ma i out 100ma 60 100 mv temperature coefficient v out ta v out v in =5.6v i out =10ma -40 ta 85 50 100 ppm/ 1 current consumption i ss1 v in =24v ? 1.2 3.0 ua 2 input voltage vin -- 30 v md71xxh series md7144h output voltage +4.4v ta=25 unless otherwise specified item symbol conditions min type max units test circuits output voltage v out v in = 6.4v i out =10ma 4.268 4.4 4.532 v 1 output current *1 i out v in= 6.4v 25 30 ma 3 dropout voltage *2 v drop i out =1 ma 40 60 mv line regulation v out1 v in v out 5.4v v in 30v i out =1ma 0.05 0.2 /v load regulation v out2 v in =6.4v 1.0ma i out 30ma 60 100 mv temperature coefficient v out ta v out v in =6.4v i out =10ma -40 ta 85 50 100 ppm/ 1 current consumption i ss1 v in =6.4v ? 1.2 3.0 ua 2 input voltage vin -- 30 v free datasheet http://
4 md71xxh series md7150h output voltage +5.0v ta=25 unless otherwise specified item symbol conditions min type max units test circuits output voltage v out v in = 7v i out =10ma 4.85 5.0 5.15 v 1 output current *1 i out v in= 7v 25 30 ma 3 dropout voltage *2 v drop i out =1 ma 40 60 mv line regulation v out1 v in v out 6v v in 30v i out =1ma 0.05 0.2 /v load regulation v out2 v in =7v 1.0ma i out 30ma 60 100 mv temperature coefficient v out ta v out v in =7v i out =10ma -40 ta 85 50 100 ppm/ 1 current consumption i ss1 v in =7v ? 1.2 3.0 ua 2 input voltage vin -- 30 v * increasing output current slowly, the i out when output voltage decreasing two percent * v drop =v in1 -v oute 0.98v v out(e) ?effective output voltage, i.e., the output voltage when fixing i out (=1ma) and inputting v out(s) +2.0 v. v in1 is the input voltage at which output voltage becomes 98 perce nt of v out(e) after gradually decreasing input voltage. test circuits 1. 2. free datasheet http://
5 3. standard circuit : note: the above connection diagram and constant will not guaran tee successful operation.perform through evaluation using the actual applicati on to set the constant. using conditions: input capacitors(cin): >1.0 f. output capacitors (cl): >2.2 f( tantalum capacitors ). *1. c in is a capacitor for stabilizing the input. *2. a ceramic capacitor can be used for c l besides a tantalum capacitor. * note: in general, linear regulated power supply may lead to oscillation by choosing the different external components. please make sure the capacitor before used in the application circuit does not oscillate. technical terms 1. output capacitors (c l ) output capacitors are generally used to stabilize regulation op eration and to improve transient response characteristics. but the md71xxh series can provide stable operation without output capacitors. capacitors are used only to improve transient response characteristics. output capacitors can hence be removed in appl ications in which transient response can be negligible. when an output capacitor is used, a low esr (equivalent series resistance) capacitor like ceramic capacitor can also be used. free datasheet http://
6 2. output voltage (v out ) the accuracy of the output voltage is 3.0% guaranteed under t he specified conditions for input voltage, which differs depending upon the product ite ms, output current, and temperature. caution: if the above conditions change, the output voltage val ue may vary and go out of the accuracy range of the output voltage. see the electrical characteristics and characteristics data for details. 3. line regulations ( v out1 /v in *v out ) these parameters indicate the input voltage dependence on the o utput voltage. that is, the values show how much the output voltage changes due to a ch ange in the input voltage with the output current remained unchanged. 4. load regulation ( v out2 ) this parameter indicates the output current dependence on the o utput voltage. that is, the value shows how much the output voltage changes due to a ch ange in the output current with the input voltage remained unchanged. 5. dropout voltage (v drop ) this parameter indicates the difference between the input volta ge (v in1 ) and the output voltage when output voltage falls to 98 % of v out(e) by gradually decreasing the input voltage (v in ). v drop = v in1 -[v out(e) 0.98] free datasheet http://
7 description of operation 1.basic operation figure 8 shows the block diagram of the md71xxh series.the error amplifier compares a reference voltage v ref with a part of the output voltage divided by the feedback resistors r s and r f , and supplies the gate voltage to the output transistor, neces sary to ensure certain output voltage independent from change of inp ut voltage and temperature. vin current sauce *1 error amplifier vout vref - rf + vf b reference voltage circuit rs vss figure 8 *1 . parasitic diode 2.output transistor the md71xxh series uses a pch mos fet as the output transistor. the voltage at vout must not exceed v in +0.3v. when the v out voltage becomes higher than that of v in , reverse current flows and may break the regulator since a par asitic diode between vout and vin exists inevitably 3. short-circuit protection installation of the short-circuit protection which protects the output transistor against short-circuit between vout and vss can be selected in t he md71xxh series. the short-circuit protection controls output current as shown in th e typical characteristics, (1) output voltage versus output current, and suppresses output current at about 40 ma even if vout and vss pins are short-circuited. the short-circuit protection can not at the same time be a ther mal protection. attention should be paid to the input voltage and the load current under the actual condition so as not to exceed the power dissipation of the package including the case for short-circuit.when the output current is large and the differen ce between input and free datasheet http://
8 output voltage is large even if not shorted, the short-circuit protection may work and the output current is suppressed to the specified value. produc ts without short-circuit protection can provide comparatively large current by removing a short-circuit protection. selection of exte rnal components output capacitor (c l ) the md71xxh series can provide stable operation without output capacitor ( c l ) since the regulator has an internal phase compensation circuit to stabili ze operation when the load changes. the transient response of the regulator, however, changes with the output capacitor and the magnitude of overshoot and undershoot on outp ut voltage accordingly changes. please refer to c l dependence data in t ransient res ponse characteristics to select suitable value for the capacitor. when a tantalum or an aluminum electrolytic capacitor is used, the esr of the capacitor shall be 10 or less. when an aluminum electrolytic capacitor is used atten tion should be especially paid to since the esr of the aluminum electrolyti c capacitor increases at low temperature and possibility of oscillation becomes large . sufficient evaluation including temperature characteristics is indispensable. precautions : design wiring patterns for vin, vout and gnd pins to hold low impedance. when mounting an output capacitor between the vout and vss pins (c l ) and a capacitor for stabilizing the input between vin and vss pins (c in ), the distance from the capacitor to the vout pin and to the vss pin should be as short as possible. note that output voltage may be increased at low load current of less than 1 ua. to prevent oscillation, it is recommended to use the external parts under the following conditions. equivalent series resistance (esr): 30 or less input series resistance (r in ): 10 or less a voltage regulator may oscillate when po wer source impedance is high and input capacitor is low or not connected. the application condition for input voltage and load current should not exceed the package power dissipation. pay attention to the operating conditions for input/output voltage and load current so that the power loss in the ic does not exceed the power dissipation of the package. do not apply an electrostatic discharge to this ic that exceeds the performance ratings of the built-in electr ostatic protection circuit. sii claims no responsibility for any and all disputes arising out of or in connection with any infringement of the products including this ic upon patents owned by a third party. free datasheet http://
9 application circuits basic circuits high output current positive voltage regulator short-circuit protection by tr1 free datasheet http://
10 circuit for increasing output voltage v out =v xx (1+r2/r1)+iss*r2 constant current regulator v out =v xx +v d1 dual supply iout=vxx/ra+iss v10.8.20 xf free datasheet http://
|
