LM79L00 Series 3-Terminal Negative Output Voltage Regulators PM isis THREE-TERMINAL NEGATIVE VOLTAGE REGULATORS ) he LM79L00 Series negative voltage regulators most applications, no external components are required are inexpensive, easy-to-use devices suitable for for operation. numerous applications requiring up to 100 mA. Like The LM79L00 devices are useful for on-card the higher powered LM7900 Series negative regulation or any other application where a regulated regulators, this series features thermal shutdown and negative voltage at a modest current level is needed. current limiting, making them remarkably rugged.In These regulators offer substantial advantage over the common resistor/zener diode approach. (FEATURES ) (PIN ARRANGEMENT } e No External Components Required = Internal Short-Circuit Current Limiting e Internal Thermal Overload Protection e Low Cost s Complementary Positive Regulators Offered PIN 1. GROUND (LM78L00 Series) 2. INFUT 3. OUTPUT e Available in +2% Voltage Tolerance (CIRCUIT SCHEMATIC ) (TYPICAL CONNECTING CIRCUIT ) REPRESENTATIVE CIRCUIT SCHEMATIC PIN 1Vour 5. GNO 2. Vx 6. Vin KB 3. Vn 7. Vin 4.NC 8. NC SOP-8 is an internally modified SO-8 Package. Pins 2,3,6 and 7 are electrically common to the die attach flag. This internal lead frame modification decreases package ther- mal resistance and increases power dissipation capability when appropriately mounted on a printed circuit board. SOP-8 conforms to all external dimensions of the standa- ard SO-8 Package. 2-22LM79L00 Series 3-Terminal Negative Output Voltage Regulators ABSOLUTE MAXIMUM RATINGS (T,= +250) ) LM79LO00 Series Unit Vin *1 ~ 30 Vv Vin *2 - 35 Vv Vin *3 - 40 Vv T T. - 65 to 150 Junction T T. 0 to 150 me Note: *1. LM79L05 *2. LM79L12, LM79L15, LM79L18 *3. LM79L24 (LM79LO5 Series ELECTRICAL CHARACTERISTICS ) (V,=-lOV , Io = 40 mA, C; = 0.33 uF, Co= 0.1 pF, 0 < T; < 125 unless otherwise noted.) LM79LO05 Characteristic Symbol Min Typ Max Unit Output Voltage (T; = + 25C) Vo -4.9 - 5,0 -5.1 Vde Line Regulation (T;=+ 25C) REGline mV -7.0 Vde 2 V;, 2 -20 Vde ~ _ 150 -8.0 Vdc 2 V, 2 -20 Vdc - - 100 Load Regulation REGload mV Ty =+ 25C, 1.0 mA $ Ip 5 100 mA - - 60 1.0 mA $155 40 mA - - | 30 Output Voltage Vo Vde - 7.0 Vde 2 V; 2 -20 Vdc, 1.0mA S$ Ip S 40 mA -49 - -5.1 V, = -10 Vde, 1.0mA $ Ip S$ 70 MA -4.9 - -5.1 Input Bias Current In mA (T;=+25C) _ ~ 6.0 (T; = +125C) - - 5.5 Input Bias Current Change Alp mA - 8.0 Vde 2 V; 2 -20 Vde - - 1.5 1.0 mA $Ip $40 mA ~ - 0.1 Output Noise Voltage Vn - 40 - pV (T, =+25C, 10 Hz $f $ 100 kHy) Ripple Rejection RR 41 49 - dB (- 8.0 2 V,2 18 Vde, f= 120 Hz, T; = 25C) Dropout Voltage IVi- Vol. _- 17 - Vde Ip = 40 mA, T; = +25C 2-23FO Morice LM79L00 Series 3-Terminal Negative Output Voltage Regulators (LM79L12 Series ELECTRICAL CHARACTERISTICS (V2 -19V , Io =40 mA, C,= 0.33 pF, Co=0.1 pF, 0% <7) < 125c unless otherwise noted.) LM79L12 Characteriatic Symbol Min Typ Max Unit Output Voltage (T;= +25) Vo - 11.76 -12 - 12.24 | Vde Line Regulation (T; = +25T) REGline mV 14.5 Vde 2 V; 2 -27 Vde ~ ~ 250 -16 Vdc 2 V; 2 -27 Vde - ~~ 200 Load Regulation REGload mV T;=+25C, 1.0 mA S$ IpS 100 mA - - 100 1.0 mA $ Io S40 mA ~ = 50 Output Voltage Vo Vde -14.5 Vde 2 V; 2 -27 Vdc, 1.0mA S$ Ip 5 40 mA - 11.66 - - 12,34 V,=-19 Vdc, 1.0mA S Ip 5 70 mA - 11.66 - + 12.34 Input Bias Current Ip mA (Ty = + 25%) - - 6.5 (T; = +1257) - - 6.0 Input Bias Current Change 4h mA - 16 Vde 2 V; 2 -27 Vde - - 1.5 LO mA SI, $40 mA - - 0.1 Output Noise Voltage Vn - 80 - pV (T, = + 25%, 10 Hz Sf Ss 100 kHz) Ripple Rejection RR 37 42 ~ dB (- 18 2 V;, 2 -25 Vdc, f= 120 Hz, T;= 25) Dropout Voltage IVrVol - 17 - Vde Ilp=40mA, Ty; =+25e (LM79L15 Series ELECTRICAL CHARACTERISTICS (V,=-23V, Ip = 40 mA, Cy = 0.33 pF, Co= 0.1 pF, 0 < T; <125C unless otherwise noted.) LM79L15 Characteristic Symbol Min Typ Max Unit Output Voltage (T; = + 25) Vo -147 715 - 15.3 Vdc Line Regulation (T;=+25%) REGline mV 17.5 Vde 2 V, 2 -30 Vde - - 300 -20 Vde 2 V, 2 -30 Vde ~- - 250 Load Regulation REGload mV Tr=+25c, 10mA S$ Ib $ 100 mA - - 150 1.0 mA S Ip $40 mA ~- - 75 Output Voltage Vo Vde -17.5 Vde 2 V; 2 -30 Vdc, 1.0mA S Ip 5 40 mA ~ 14.25 - 15.75 V, = -23 Vdc, 1.0mASI15570mA - 14.25 - -15.75 Input Bias Current Ip mA 1=+25%) - - 6.5 (T)=+ 125%) -- - 6.0 Input Bias Current Change lp mA -20 Vde 2 V; 2 -30 Vdc - - 1.5 LOmAS IL, 540 mA - - 0.1 Output Noise Voltage Vn ~- 90 - pV (T,=+25%, 10 Hz <5 fS 100 kH,) Ripple Rejection RR 34 39 - dB (-18.5 Vde S VS +28.5 Vde, f= 120 Hz) Dropout Voltage iVrVol ~ 17 ~ Vde b=40 mA, T)=+25 | 2-24LM79L00 Series 3-Terminal Negative Output Voltage Regulators oo (LM79L18 Series ELECTRICAL CHARACTERISTICS ) (Vy = -27V , Ip = 40 mA, C, = 0.33 pF, Co=0.1 pF, O% < Ty < 125% unless otherwise noted.) LMT79L18 Characteristic Symbol Min Typ Max Unit Output Voltage (T;= + 25%) Vo - 17.64 -18 - 18.36 Vde Line Regulation (T;=+ 25) REGline mV -20.7 Vde 2 V; 2 -33 Vde - ~ 325 -21.4 Vde 2 V; 2 -33 Vde - - - -22 Vde 2 V; 2 -33 Vde - - - -21 Vde 2 V, 2 -33 Vdc - - 275 Load Regulation REGload mV T;=+25%, 1.0mAS1I55 100 mA - - 170 10mA S145 40 mA - - 85 Output Voltage Vo , Vde -20.7 Vdc 2 V; 2 -33 Vdc, 1.0mA S Ip $ 40 mA - 17.44 ~ - 18.56 -21.4 Vdc 2 V, 2 -33 Vde, LOMA SI $40 mA - - > Vi=-27 Vde, LOmA S155 70 mA - -17.1 - - 1.89 Input Bias Current Ip mA (T;=+ 25%) - - 6.5 (T;=+ 125%) - - 6.0 Input Bias Current Change Ale mA -21 Vde 2 V; 2 -33 Vde - ~ 1.5 #27 Vde 2 Vj 2 -33 Vde ~ - bd 1O0mASIh $40 mA - - 0.1 Output Noise Voltage Vn - 150 - yV (T, = + 25%, 10 Hz Sf Ss 100 kH,) Ripple Rejection RR 33 48 _ dB (- 23 2 V, 2 -33 Vde, f= 120 Hz, T; = 25%) Dropout Voltage IVrVol - 7 - Vde lh=40 mA, Tr=+ 25% 2-25Fa cri LM79L00 Series 3-Terminal Negative Output Voltage Regulators LM79L24 Series ELECTRICAL CHARACTERISTICS (V, = -33V, Ip =40 mA, C;= 0.33 BF, Co=0.1 pF, Oc < T;> 125% unless otherwise noted.) LM79L24 Characteristic Symbol Min Typ Max Unit Output Voltage (T; = + 25%) Vo - 23.52 -24 -24.48 | Vde Line Regulation (T; = +25%) REGline mV = 27 Vdc 2 V; 2 -38 Vde - - 350 -27.5Vde 2 V; 2 -38 Vde - - - +28 Vde 2 V, 2 -38 Vde ~ - 300 Load Regulation REGload mV T= + 25C, 1.0 mA S$ Ip S 100 mA ~ - 200 10mA <1p 540 mA - = 100 Output Voltage Vo Vdc -27 Vde 2 V; 2 -38 Vdc, 1.0mA S Ip S$ 40 mA : - 23.32 ~ 24,68 -28 Vde 2 V; 2 -38 Vdc, 1.0mA S$ Ip S 40 mA - - - V1 = -33 Vdc, 1.0 mA $ Ip S 70 mA - 23.32 - -24.68 Input Bias Current Ip mA (T; = + 25%) -- - 6.5 (T= + 125%) - - 6.0 Input Bias Current Change Alp mA -28 Vde 2 V; 2 -38 Vdc - - 1.5 1.0mA Sip $40 mA - - | 01 Output Noise Voltage Vn - 200 - BV (T, = + 25%, 10 Hz Sf S 100 kHz) Ripple Rejection RR 31 47 - dB (-29 5 V;S -35 Vde, f= 120 Hz, T) = 25%) Dropout Voltage [VieVol - 17 - Vde Ip = 40 mA, T7= + 25% PLICATIONS INFORMATION Design Considerations The LM79L00 Series of fixed voltage regulators are designed with Thermal Overload Protection that shuts down the circuit when subjected to an excessive power overload condition, Internal Short-Circuit Protection that limits the maximum current the circuit will pass. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long FIGURE 1 - POSITIVE AND NEGATIVE REGULATOR ta tf We wire lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high-frequency characteristics to insure stable operation under ali load conditions. A 0.33 pF or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. Bypassing the output is also recommended. FIGURE 2-STANDARD APPLICATION Input [were | 1 Output Cink sce 0.334F at A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V above the output voltage even during the low point on the input ripple voltage. * = Cy is required if regulator is located an appreciable d from power supply filter. ** 3 Co improves stability and transient response. 2-26Vo.OUTPUT VOLTAGE(VOLTS) Po.POWER DISSIPATION(mW) 1, .INPUT BIAS CURRENT(mA) 0 FIGURE 5-INPUT BIAS CURRENT versus > nv + 2 o a 3.6 3.4 22 3.0 FIGURE 7-MAXIMUM AVERAGE POWER 10000 1000 100 - n? an = FIGURE 3-DROPOUT CHARACTERISTICS ~$.0 6.0 78.0 Vit.INPUT VOLTAGE(VOLTS) AMBIENT TEMPERATURE 25 50 7 100 Ti.AMBIENT TEMPERATURE(C) 125 DISSIPATION versus AMBIENT TEMPERATURE -TO-92 Type Package 50 7 100 125 Ta AMBIENT TEMPERATURE(*C) 150 LM79L00 Series 3-Terminal Negative Output Voltage Regulators Vi -Vo.INPUT/OUTPUT DIFFERENTIAL FIGURE 4-DROPOUT VOLTAGE versus JUNCTION TEMPERATURE 2.5 Dropout of Regulation is defined when 6o=2% of Yo VOLTAGE (VOLTS) ' Q 50 98 100 125 1 JUNCTION TEMPERATURE(C) FIGURE 6-INPUT BIAS CURRENT versus INPUT VOLTAGE 5.0 z ~ +0 Zz @ # 3.0 9 LY79L05 4 Vo=~-5.0V R20 lo=40mA & Ti =25C =z 1.0 8 9 0 -5.0 -10 -15 -20 -25 -30 -35 ~40 Ve INPUT VOLTAGE(VOLTS) 2-27