LM7900 FCI | Alldatasheet
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M7900 Series 3-Terminal Negative Semiconductor Output Voltage Regulators FEATURES PIN ARRANGEMENT. * No Extemal Components Required ¢ Intemal Thermal Overload Protection O © Internal Short-Circuit Current Limiting + Output Transistor Safe-Area Compensation lp 1, GROUND (Heatsink + Available in 2% Voltage Tolerance (See Ordering Information) eT surface conn THREE-TERMINAL NEGATIVE VOLTAGE REGULATORS. The LM7900 Series of fixed output negative Available in fixed output voltage options from - voltage regulators are intended as complements to the -5.0to -24 volts, these regulators employ current popular LM7800 Series devices. These negative limiting, thermal shutdown, and safe-area compensation- regulators are available in the same seven-voltage -making them remarkably rugged under most operating options as the LM7800 devices. In addition, one extra conditions. With adequate heatsinking they can deliver voltage option commonly employed in MECL systems is output currents in excess of 1.5ampere. also available in the negative LM7900 Series. CIRCUIT SCHEMATIC SCHEMATIC DIAGRAM |_| : 7 a cat Pf Gow : ° a | - u 2-15
LM7900 Series 3-Terminal Negative Semiconductor Output Voltage Regulators ABSOLUTE MAXIMUM RATINGS, (Ta=25t) Ppt} 15 =20 10 +75, | Operating Junction Temperature | -20 to +125 ~55 10 3125 Note; *1: LM7905, M7906, LM7908, LM7909, LM7912, LM7915, LM7918 *2: LM7924 *3: Follow the derating curve, When Tj exceeds 150°C, the intemal circuit cuts off the output. LM7905 ELECTRICAL CHARACTERISTICS (Vin=-10V, Iout=500mA, Cin=2, F, Cout=1y F; Tj=0% to 125+, unless otherwise specified.) tem Symbol Circuit Condition Min. Typ. Max. Unit [Ouput Voltage Vo tense 50st [Poems [ein ae Te PpcisW. Line Regulation [ome TT | T25e [Ve7to2sv P= 00 mv [Viesto-lav 0 REGIoad || Ty2s¢ | besmato Saf = T0100 mv 7 [b=250mA to 750mA J = Ts Tso mv | [Bias Curent eens a Fluctuation FN al a Fluctuation. [Output Noise Voltage | Va | 1 _| fl0Hzto 100KHz, Te=250 ee ee | Ripple Rejection Ratio [RR 3 “Vie-8 to -18V, b=100mA, I20Hz [62a | Difference ae Lown | re | ‘Note: The specified condition Tj=25'C means that the test should be carried out with the test time so short (within 10mS), that the drift in ‘characteristic value due to the rise in chip junction temperature can be ignored. TYPICAL CONNECTING CIRCUIT. STANDARD APPLICATION : cin’ 1 " oss Sur Acommon ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V more negative even during the high point oo the input ripple voliage. XX = thee two digits of the type number indicate voltage. ‘* =Cin is required if regulator is located an appreciable distance from power supply filter. + =Co improves subility and transient resp 2-16
LM7900 Series 3-Terminal Negative Semiconductor Output Voltage Regulators LM7906 ELECTRICAL CHARACTERISTICS (Vin=-11V, Iout=500mA, Cin=2y F, Cour=1, F; Tj=0% to 125%, unless otherwise specified.) ae |p [BS Parra Sym Circuit Condition yp Tolerance Po<isw Line Regulation REGIi mn [Viedto-I3v_ as 60 mv Load Regulation REGload [ese | eesevto SA =f et ae a [1o=250mA to750mA[ — [360 mv | Bias Current Tyg Tasca ma Fluctuation Fluctuation [Output Noise Valtage | Va | 1 Fe10Firto 100KHi, Tawi a eC | Ripple Rejection Ratio [RR | 3 | Vie 9 to -19V, o=100mA, f120H2 | 6073 [= BT ‘Min. 1/0 Voltage Vaif ela, Tease Vv bitewe | | a a | Peak Output Current [Topeak [Tease aa =. Tone Tempoerature Coefficient__| a Vo/Ta Io=SmA, Tj=0 to 125% m/c Note: The specified condition Tj=25c means that the test should be carried out with the test time so short (within 10mS), that the drift in characteristic value due to the rise in chip junction temperature can be ignored, LM7Z908 ELECTRICAL CHARACTERISTICS (Vin=-14V, Iour=500mA, Cin=2,. F, Cour=1y F; Tj-0% to 125%, unless otherwise specified.) Sym Circuit Condition yp Po<i SW peewee [wom [Te Renee = te [Viellto-i7v T= 280 mv REGload ee ee [To=250mA to 750ma [=a 80 mv [ Bias Current ig ease as ma] Input Bias Current 2 lg I Vie10.510-25V, 125% [Ream [eee] See Load Bias Current rama 1A, Had [Heme [SES | FO [meres ee [Output Noise Voltage [Va 10H to T00KHz, Tae25e ee ee ee | Ripple RejectionRatio | RR___| 3 _| Viel to-21V, lp=100mA, 120Hz | 56. | 71 | - | dB | Min. VO Voltage ait GIA, T25e v Difference Peak Output Current, [Topeak [Tez aA ‘Output Voltage ‘Tempoerature Coefficient_| 4 Vo/Ta p=SmA, Tj=0 to 125% mic. Note: The specified condition Tj=25% means that the test should be carried out with the test time so short (within 10mS), that the drift in characteristic value due to the rise in chip junction temperature can be ignored. 2-17
LM7900 Series 3-Terminal Negative Semiconductor Output Voltage Regulators LM7909 ELECTRICAL CHARACTERISTICS (Vin=-15V, Iout=500mA, Cin=2,. F, Cout=1y F; Tj=0% to 125%, unless otherwise specified.) [nem | syns [eeu | _—conanton | tn. | app. | tex | vase | [Output Voltage Vo Tease 99s ‘Output Voltage Vo T Vi=I1.5 to -24V, Io=SmA to 1A, Pe? [= P=] | Tolerance Po<15W. Vie12 to -18V. [= 2 0 mv REGload [7 | Ty25e [TowsmAto LSA = 2 sof mv [1g=250mA to 750mA [490 mv (Bias Curent ig 2 ease as Input Bias Current ‘Aliinput | 2 Vieli.5 to -26V, T= | - | [i [= | ecnaten mt Y= Fluctuation [Output Noise Voltage | Vn | 1 | 10H to lOOKHz, Te=25 a ee ee Ripple Rejection Ratio PRR | 3 | Vie-12 to -22V, Ip=100mA, 120Hz [S671 | | Difference ‘Peak Output Current [Topeak [frets a ie Po Toe = Taw Tempoerature Coefficient | A Vo/Ta 1 Io=SmA, Ti=0 to 125% 06 = | awe Note: The specified condition Tj=25%c means that the test should be carried out with the test time so short (within 10mS), that the drift in characteristic value due to the rise in chip junction temperature can be ignored. M7912 ELECTRICAL CHARACTERISTICS (Vin=-19V, Iout=500mA, Cin=2u. F, Cout=l, F; Tj=0% to 125%, unless otherwise specified.) [em | ym | es [ aan, | nye. | tee | vate _| Symbol_| Circuit Condition 23 [Output Voltage Vo Tease 6 T1224 Tv ‘Output Voltage Tolerance a | Vie-14.5 10-27, lo=SmA to 1A, pep = [Pee y | Po<isW [ He Resuaon | Recline | 1 Tje2se— [Viel4Sto3ov 0240 mv | ViE=16 to -22V [= 3 ao mv REGload [7 | Ty25 | Tg=SmA to 1 SA [= 2 ao av | To=250mA to 750mA [= a0 mv [Bias Current trp ease as ms Input Bias Current Glpinpat | 2 Vi=-14.5 to -30V, T]-25 [=] Fluctuation Load Bias Current Bip Load | 2 ToSmA to 1A, 1-25 Fasnatos ° ° p= fet | [Output Noise Voltage | ee to 100KFz, Te=25% a a RR [3 ViEiS to -25V, Ig 100ma, 120K [ss [70 T= TB Min. UO Voltage Veit Tost, T=25C [- | v Difference Peak Output Current [Topeak [1 Te25e ee ee ee a Tempoerature Coefficient__|_4 Vo/Ta 1 IgeSmA, Ti=0 to 125% mV/¢ Note: The specified condition Tj=25%c means that the test should be carried out with the test time so short (within 10mS), that the drift in characteristic vaiue due to the rise in chip junction temperature can be ignored. a 2-18
LM7900 Series 3-Terminal Negative Semiconductor Output Voltage Regulators LM7915_ ELECTRICAL CHARACTERISTICS (Vin=-23V, Iout=500mA, Cin=2,. F, Coury F; Tj=0% to 125%, unless otherwise specified.) a Item Symbol _| Circuit Condition Min. | Typ [Ramee [| ere iennanyee te Tolerance - Line Regulation Tease [tekesaes [eee [eS Pea ie a REGload SS ee [ Resins | [ig=250mAto750mA | = | 4150 mv [BissGuret ie] 2 ese ss ma | a Ae Histon [eee | es eer ee Fluctuation: (Output Noise Voltage | Va | 1 | 10Hzto 1O0KHz, Tease oo Vv (Ripple Rejection Ratio | RR | 3 -Vie 18.5 to -28 SV, Ip=100mA 120K [54 Ty a Beare | eee Difference [Peak Ourpat Curent | Topeak [1 Tpeasq a = A) teem Law 11 Lemus 1 = Lar [= Low Tempoerature Coefficient__| 4 Vo/Ta 1 o=SmA, Ti=0 to 125% m/c Note: The specified condition Tj=25%¢ means that the test should be carried out with the test time so short (within 10mS), that the drift in characteristic value due to the rise in chip junction temperature can be ignored. LM7918 ELECTRICAL CHARACTERISTICS (Vin=27V, lour=S00mA, Cin=2,. F, Cour=1y. F; TiO to 125°C, unless otherwise specified.) Ps re ee Sym Circuit Condition P [OurputVotage | ot Tease gas ig 1836 TV ener [Seren ee <1 SW, [ene eee es ees a [Vie24to-30v_ S180 mv i cee A [lo=250mA to 750mA [= Te [180 mv [Bias Current ig pense ass ma | [= load ne Fluctuation a eee fewer | Fluctuation | Ripple Rejection Ratio [RR [3 Vie 22 10 -32V los100ma, 120K [53 eT [Baas | are Difference [ Peak Output Current | Topeak [1 Tetsq a =a] ‘Ourput Voltage [Ferme | avons | 1 lisimatroonse | Ta | [ave | ‘Note: The specified condition Tj=25°C means that the test should be carried out with the test time so short (within 10mS), thet the drift in characteristic value due to the rise in chip junction temperature can be ignored. EEE 2-19
LM7900 Series 3-Terminal Negative Semiconductor Output Voltage Regulators (M7924 ELECTRICAL CHARACTERISTICS (Vin=-33V, Iour=S00mA, Cin=2,, F, Cout=1, F; Tj=0% to 125+, unless otherwise specified.) [ em | [ ain, | yp. | mex | vase | Symbol _| Circuit Condition vp Unit [OmpuVolage [vo | 1 ime SC ang fe eae [OV ‘Output Voltage Tolerance | Vo Vi=27 to -38V, lo=SmA to 1A, [3 | [| Vv Po<i SW. [FaeRerussen | ReGine 1 | T25e [vetosev | | is 480 mv [Vie30to-36V_ | 240 mv) REGload Ty=25—— [To=SmA 10 1.5A’ a To=250mA to 7S0mA_ | — | 4 | 240 mv | (Bis Curent ide i ee sma Input Bias Curreat ‘Sip input Vi=27 to -38V, Tj=25C | - | [7 [™ | Fluctuation. Fluctuation (Output Noise Voltage | Vn | 1 _| f10Hzto 100KHz, Te=25C [= 0 =v} [Ripple Rejection Ratio | RR | 3 __| Vie 28 t0-38V,lo=100mA, lz0Hz [50 [os [= [eB Difference [Peak Oupat Curent | lopeak | 1 |Tese ST Tt A eetieeen Lowe [1 umneene 1-1 a t= | Tempoerature Coefficient | 4 Vo/Ta o=SmA, Tjn0 to 125% mvc Note: The specified condition Tj=25%C means that the test should be carried out with the test time so short (within 10mS), that the drift in characteristic value due to the rise in chip junction temperature can be ignored. TEST CIRCUIT 1 TEST CIRCUIT 2 = w + Ozu 4 wz OO Bry? 8 SORT oO lo lo TEST CIRCUIT 3 Fm zo =: Wil lo SS 2-20
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