LINEAR INTEGRATED CIRCUITS

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1 LNEAR NTEGRATED CRCUTS 3-TERMNAL POSTVE VOLTAGE REGULATORS OUTPUT CURRENT UP TO 1.5A OUTPUT VOLTAGES OF 5; 6; 8; 12; 15; 18; 20; 24V THERMAL OVERLOAD PROTECTON SHORT CRCUT PROTECTON OUTPUT TRANSSTOR SOA PROTECTON The L7800 series of three-terminal positive regulators is available in TO-220 and TO-3 packages and with several fixed output s, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type employs internal limiting, thermal shut-down and safe area protection, making it essentially indestructible. f adequate heat sinking is provided, they can deliver over 1 A output. Although designed primarily as fixed regulators, these devices can be used with external components to obtain adjustable s and s. ABSOLUTE MAXMUM RATNGS Vi DC input (for Va = 5 to 18V) (for Va = 20, 24V) Output Power dissipation Operating junction temperature (for L7800) (for L7800C) Storage temperature 35 V 40 V internally limited internally limited -55 to +150 C Oto+150 C -65 to C MECHANCAL DATA Dimensions in mm 8.,...,1.7 (.-00$3t TO-220 TO /82

2 CONNECTON DAGRAMS AND ORDERNG NUMBERS (top views)!)-lsti8/' o OUTPUT ~ C). ~")3 GND,0 NPUT 5--25&912 Type TO-220 TO-3 L L 7805T L 7805C L 7805CV L 7805 CT L L 7806T L 7806C L 7806 CV L 7806CT L L 7808T L 7808C L 7808 CV L 7808CT L L 7812T L 7812C L 7812CV L 7812CT L L 7815T L 7815C L 7815CV L 7815CT L L 7818T L 7818C L 7818CV L 7818CT L L 7820T L 7820C L 7820CV L 7820CT L L 7824T L 7824C L 7824CV L 7824CT Output 5V 5V 6V 6V 8V 8V 12V 12V 15V 15V 18V 18V 20V 20V 24V 24V BLOCK DAGRAM NPut 'O---~ ~ ~-1 154

3 SCHEMATC DAGRAM Q17 R5 R12 Rll OUT R6 R15 R20 Qll D1 R7 R, R2 07 R19 TEST CRCUTS Fi!l. 1 - DC parameters Fig. 2 - Load regulation Fi!l. 3 - Ripple rejection THERMAL DATA TO-220 TO-3 Rth H:ase Rth j-amb Thermal resistance junction-case Thermal resistance junction-ambient max max 3 C/W 50 C/W 4 C/W 35 C/W 155

4 ELECTRCAL CHARACTERSTCS L 7800 (Refer to the test circuits, T J = -55 to 150"C, 10 = 500 rna, C i = 0.33 ij.f, C o = 0.1 ij.f unless otherwise specified) OUTPUT VOLTAGE NPUT VOLTAGE (Unless otherwise specified) Unit Parameter Test conditions Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Vo Output Tj: 25 C lo""5mato1a Po,,15W (V,: 8 to 20V) (V,: 9 to 21V) (V,: 11.5 to 23V) (V,: 15.5t027V) V tno Line regulation (V,: 7 to 25V) (V,: 8 to 25V) (V,: 10.5 to 25V) (V,: 14.5t030V) Tj: 25 C (V,: 8 to 12V) (V,: 9 to 13V) (V,: 11 to 17V) (V,: l&to 22V) mv t1vo Load Tj: 25 C regulation 10:5mAtol.5A Tj: 25 C = 250 to 750 rna mv 'd Quiescent Tj: 25 C ma t1'd Quiescent lo=5rnato 1A change (Vi: 8 to 25V) (V,: 9 to 25V) (V,: 11.5 to 25V) (V,: 15 to 30V) ma t1vo Output 10= 5 rna mv/oc TT drift en output B: 10Hz to 100KHz ",V noise Tj: 25 C -- Vo SVR Supply f: 120Hz db (V,: 8 to 18V) (V,: 9 to 19V) (V,: 11.5 to 21.5V) (V,: 15 to 25V) rejection Vd Dropout 10= 1A V T): 25 C Ro Output f: 1 KHz mil resistance 'se Short Vi: 35V A circuit T): 25 C scp Short Tj: 25 C A eire. peak cup'"ent 156

5 ELECTRCAL CHARACTERSTCS L 7800 (continued) OUTPUT VOLTAGE NPUT VOLTAGE (Unless otherwise specified) Unit Parameter Test conditions Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Va Output T J = 25'C '0"" 5 ma to 1 A Po';;;; l5w V;= 18.5 to 30V V;= 22 to 33V V;= 24 to 35V V;= 28 to 38V V :o.va Line regulation T J = 25'C V;= 17.5 to 30V V;= 21 to 33V V;= 22.5 to 35V V;= 27 to 38V Vj= 20 to 26V V;= 24 to 30V V;= 26 to 32V V;= 30 to 36V rnv 6.V a Load T J = 25'C regulation 10= 5 ma to 1.5A Tj = 25 C '0= 250 to 750 ma rnv d Quiescent Tj= 25'C rna 6. l d Quiescent 'o==5matola change V;= 18.5to30V V;= 22 to 33V V;= 24 to 35V V;= 28 to 38V rna 6.Va Output 10= 5 ma rnv/oc c;:t drift en output B= 10Hz to 100KHz ~V -- nose Tj= 25 C Va SVR Supply f = 120 Hz db V;=18.5 to 28.5V V;= 22 to 32V V;= 24 to 35V V;= 28 to 38V rejection Vd Dropout 10= la V Tj'= 2SoC Ra Output f = 1 KHz rnd resistance " Shart V;= 35V A circuit Tj= 25 C tscp Short.Tj = 25 C A eire. peak 157

6 ELECTRCAL CHARACTERSTCS L 7800C (Refer to the test circuits, T j 10 = 500 ma, C j = 0.33 JlF, Co = 0.1 JlF unless otherwise specified) o to 125 C, OUTPUT VOLTAGE NPUT VOLTAGE (Unless otherwise specified) Unit Parameter Test conditions Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Vo Output T J = 25'C 4.S S S lo""5matola S S Po";; 15W (V i= 7 to 20V (V j "" 8 to 21 V) (Vi= 10.5 to 25V (Vi= 14.5 to 27V V :c,v o Line regulation (V i= 7 to 25V (Vi= S to 25V (Vi=10.5t025V (Vi= 14.5to30V TJ= 25'C SO 120 (Vi= S to 12V (Vi= 9 to 13V (V i= 11 to 17V (Vi= 16 to 22V mv ~Vo Load T j = 25'C regulation 10= 5 ma to 1.5A T j = 25'C SO = 250 to 750 ma mv d Quiescent T j = 25'C S 8 8 S rna L.ld Quiescent lo=5matola change (Vi= 7 to 25Vj (Vj= 8 to 25V) (Vi= 10.5 to 25V (Vi= 14.5to30V rna -~ 6T Output 10= 5 rna O.S -O.S -1 mv/'c drift en Output B'" 10Hz to 100KHz MV noise TJc 25'C SVR Supply f=120hz db (Vi= S to lsv (Vi= 9 to 19V (Vi= 11.5 to 21.5V) (Vi= 15 to 25V rejection Vd Dropout 10= la V Ro Output f = 1 KHz mil resistance,c Short Vi= 35V rna circuit T j = 25'C scp Short T j = 25'C A eire. peak 158

7 ELECTRCAL CHARACTERSTCS L 7800C (continued) OUTPUT VOLTAGE NPUT VOLTAGE (Unless otherwise specified) Unit Parameter Test conditions Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Va Output T j " 25 C lo""5mato la Po';;;; 15W V;" 17.5 to 30V V;" 21 to 33V V;" 23 to 35V V;" 27 to 38V V "Va Line regulation V;" 17.5 to 30V V;" 21 to 33V V;" 22.5 to 35V V;" 27 to 38V TJ" 25 C V;" 20 to 26V V;" 24 to 30V V;" 26 to 32V V;" 30 to 36V rnv "Va Load TJ" 25 C regulation r a '" 5 rna to 1.5A T j " 25 C ::' 250 to 750 rna rnv d Quiescent T j " 25 C rna "d Quiescent lo=5mato la change V;" 17.5t030V V;" 21 to 33V V;" 23 to 35V V;" 27 to 38V rna ~ Output 10= 5 rna rnv/oc "T drift en Output B= 10Hz to 100KHz ~V noise T j " 25 c C SVR Supply f"120hz db rejection Vd Dropout 10= 1A i 2 V Ro Output f = 1 KHz rnn resistance - so Short Vi'" 35V rna circuit T j "25 C sep Short T j ~ 25 C A eire. peak 159

8 V' '.5 05 Fig. 4 - Dropout vs. junction temperature L 78XX t-- r-::: ::-- ~ f- ---~ DROPOUT CONDTONS AVo:OSo,. of Vo 20~ , Tj re) (0 (A, Fig. 5 - Peak output vs. input/output differential Fig. 6 - Supplv rejection vs. frequency ::rttlmti,~~'tm~tt!m-tlrll'~i1i~ eo i '! +t+l,++i'#--'--"80-"-5 +ti+ll till F ' ' rr--t.ljjjjh-r i-m, l +1-+Htflill,! '...~ 111 ~. 20 :Jltiil ~t:""",_t.id8.. v-hlt-t+tttt1lt--+++ti+ll. 1,il ~;"'C" Hili ' )()' f (Hz) Fig. 7 - Output vs. junction temperature Tj (oe) 'lfll'!l (11) 20 ~ 10 Fig. 8 - Output impedance vs. freauency 10' 10' 10' Fig. 9 - Quiescent vs. junction temperature G-297" 'd (rna) mtt' +~++ H f- H;;;): :. +- % / i /! tt-t i L780S, l S Tj (Oe) ''e (V) ~, Fig response rlv r- r- %= v r--h~ Load transient L 7805 LOAD CURREN i,,.1-., i i""- r-- i""- t---~ : :::-.. t-- -- J",. OUTPUT VOLTAGE DEVATON "- V,! -+t= G 2971 (0 (A t (us).v 0 (m' Fig. 11 response Line transient G v,, ( v, NPUT VOlTAGE L i 20 (Q 10 ~~mto~tage, o-sooma 'SV i ~1O ~20 ~ o 10 t{jjs)..i Fig Quiescent vs. input Vi (V) 160

9 APPLCATON NFORMATON (continued) Fig Fixed output regulator Fig Costant regulator V; Notes: (1) To specify an output, substitute value for "XX". (2) Although no output capacitor is needed for stability, it does improve transient response. (3) Required if regulator is located an appreciable distance from power supply filter. Fig Circuit for increasing output Fig. 16 -Adjustable output regulator (7 to 30V) vxx! R1 R2 Fi~ to 10V regulator Fig HiQh regulator V BEQ1 161

10 APPLCATON NFORMATON (continued) Fig High output with short circuit protection Fig Tracking regulator '\10 COMMON ~ -Vo Fig Split power supply (±15V - 1A) Fig Negative output circuit +20VC)--'---'- F--~>---'-O + 15 V - 20Vo--""'--"l r o 15V J Against potential latch-up problems Fig Switching regulator Fig High input circuit 162

11 APPLCATON NFORMATON (continued) Fig High input circuit Fig High output regu lator Fig High input and output Fig Reducing power dissipation with dropping resistor R = ~mjn) - Vxx - VOROP(max) lo(max) + d(max) Fig Remote shuntdown 163

12 APPLCATON NFORMATON (continued) Fig Power AM modulator (unity gain, 1 0 ';;; 1A) Fig Adjustable output with temperature compensation. v;o-!j L 7BXX r'---t----< 13! Q1 ~~3 C&-r--t---' Note: The circuit performs well up to 100 KHz. Note: " 02 is connected as a diode in order to compensate the variation of the 01 V BE with the temperature. C allows a slow rise-time of the V 0 R2 Vo= Vxx ( VBE R1 Fig Light controllers (V o min= Vxx + VBE ) (a) (b) V; v 0 falls when the i!lht!loes up Vo rises when the light goes up Fig Protection against input short-circuit with high capacitance loads Applications with high capacitance loads and an output greater than 6 volts need an external diode (see fig. 33) to protect the device against input short circuit. n this case the input falls rapidly while the output decreases showly. The capacitance discharges by means of the Base-Emitter junction of the series pass transistor in the regulator. f the energy is sufficiently high, the transistor may be destroyed. The external diode by-passes the from the e to!lround. 164

L78S00 series. 2A Positive voltage regulators. Feature summary. Description. Schematic diagram

L78S00 series. 2A Positive voltage regulators. Feature summary. Description. Schematic diagram 2A Positive voltage regulators Feature summary Output current to 2A Output voltages of 5; 7.5; 9; 10; 12; 15; 18; 24V Thermal overload protection Short circuit protection Output transition SOA protection