www.fairchildsemi.com MC79LXXA/LM79LXXA 3-Terminal 0.1A Negative Voltage Regulator Features Description * * * * * * These regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. Output Current up to 100mA No External Components Internal Thermal Over Load Protection Internal Short Circuit Current Limiting Output Voltage Offered in 5% Tolerance Output Voltage of -5V, -8V, -12V, -15V, -18V, -24V TO-92 SOT-89 1 1 1.GND 2.Input 3.Output 8-SOP 1 1. Output 2.3.6.7. Input 5. GND 4.8. NC Internal Block Diagram GND R26 R15 Q10 Q12 Q11 D3 D2 R22 Q5 R23+R21 Q6 Q7 R R18 Q4 Q15 Q16 Q14 R28 R24 Q17 Q9 Q13 R25 C1 R29 R7 R16 R17 Q8 Q1 D1 R1 R6 R2 R3 R27 Output Q2Q3 R4 R5 Input Rev. 1.0.2 (c)2002 Fairchild Semiconductor Corporation MC79LXXA/LM79LXXA Absolute Maximum Ratings Parameter Symbol Value Unit VI -30 -35 -40 V Operating Temperature Range TOPR 0 ~ +125 C Storage Temperature Range TSTG -65 ~ +150 C Input Voltage (for Vo = -5V to -8V) (for VO = -12V to -18V) (for VO = -24V) Electrical Characteristics(MC79L05A/LM79L05A) (VI = -10V, IO = 40mA, CI = 0.33F, CO = 0.1F, 0C TJ +125C, unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit -4.8 -5.0 -5.2 V -7.0V VI -20V - 15 150 mV -8V VI -20V - - 100 mV 1.0mA IO 100mA - 20 60 mV 1.0mA IO 40mA - 10 30 mV -7.0V VI -20V, 1.0mA IO 40mA -4.75 - -5.25 V VI = -10V, 1.0mA IO 70mA V VO TJ = +25C Line Regulation (Note1) VO TJ =+25C Load Regulation (Note1) VO TJ =+25C Output Voltage Output Voltage VO Quiescent Current IQ -4.75 - -5.25 TJ =+25C - 2.0 5.5 TJ = +125C - - 6.0 mA With Line IQ -8V VI -20V - - 1.5 mA With Load IQ 1.0mA IO 40mA - - 0.1 mA VN TA = +25C,10Hz f 100kHz - 30 - V Ripple Rejection RR f = 120Hz, -8V VI -18V TJ = +25C 41 60 - dB Dropout Voltage VD TJ = +25C - 1.7 - V Quiescent Current Change Output Noise Voltage Note: 1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 2 MC79LXXA/LM79LXXA Electrical Characteristics (MC79L08A) (Continued) (VI = -14V, IO = 40mA, CI = 0.33F, CO = 0.1F, 0C TJ +125C, unless otherwise specified) Parameter Symbol Min. Typ. Max. Unit -7.7 -8.0 -8.3 V -10.3V VI -23V - - 175 mV -12V VI -23V - - 125 mV 1.0mA Io 100mA - - 80 mV 1.0mA Io 40mA - - 40 mV -10.3V VI -23V, 1.0mA Io 40mA -7.6 - -8.4 VI = -14V, 1.0mA Io 70mA -7.6 - -8.4 Tj = +25C - - 6.0 Tj = +125C - - 5.5 -11.7V VI -23V - - 1.5 mA 1.0mA Io 40mA - - 0.1 mA VN Tj = +25C,10Hz f 100kHz - 50 - V Ripple Rejection RR f = 120Hz, -11V VI -21V Tj = +25C 39 55 - dB Dropout Voltage VD Tj = +25C - 1.7 - V Output Voltage Conditions VO TJ = +25C Line Regulation(Note1) VO TJ = +25C Load Regulation (Note1) VO TJ = +25C Output Voltage VO Quiescent Current Quiescent Current Change Output Noise Voltage Iq With Line With Load IQ V mA Note: 1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 3 MC79LXXA/LM79LXXA Electrical Characteristics(MC79L12A) (Continued) (VI = -19V, IO = 40mA, CI = 0.33F, CO = 0.1F, 0C TJ +125C, unless otherwise specified) Parameter Symbol Output Voltage Conditions VO TJ = +25C Line Regulation (Note1) VO TJ = +25C Load Regulation (Note1) VO TJ = +25C Output Voltage VO Quiescent Current IQ Min. Typ. Max. -11.5 -12.0 -12.5 Unit V -14.5V VI -27V - - 250 mV -16V VI -27V - - 200 mV 1.0mA IO 100mA - - 100 mV 1.0mA IO 40mA - - 50 mV -14.5V > VI > -27V, 1.0mA IO 40mA -11.4 - -12.6 V VI = -19V, 1.0mA IO 70mA V -11.4 - -12.6 TJ = +25C - - 6.0 TJ = +125C - - 6.5 mA With Line IQ -16V VI -27V - - 1.5 mA With Load IQ 1.0mA IO 40mA - - 0.1 mA VN TA = +25C,10Hz f 100kHz - 80 - V Ripple Rejection RR f = 120Hz, -15V VI -25V TJ = +25C 37 42 - dB Dropout Voltage VD TJ = +25C - 1.7 - V Quiescent Current Change Output Noise Voltage Note: 1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 4 MC79LXXA/LM79LXXA Electrical Characteristics(MC79L15A) (Continued) (VI = -23V, IO = 40mA, CI = 0.33F, CO = 0.1F, 0C TJ +125C, unless otherwise specified) Parameter Symbol Output Voltage Conditions VO TJ = +25C Line Regulation (Note1) VO TJ = +25C Load Regulation (Note1) VO TJ = +25C Output Voltage VO Quiescent Current IQ Min. Typ. Max. -14.4 -15.0 -15.6 Unit V -17.5V VI -30V - - 300 mV -20V VI -30V - - 250 mV 1.0mA IO 100mA - - 150 mV 1.0mA IO 40mA - - 75 mV -17.5V VI -30V, 1.0mA IO 40mA -14.25 - -15.75 V VI = -23V, 1.0mA IO 70mA V -14.25 - -15.75 TJ = +25C - - 6.0 TJ = +125C - - 6.5 mA With Line IQ -20V VI -30V - - 1.5 mA With Load IQ 1.0mA IO 40mA - - 0.1 mA VN TA = +25C,10Hz f 100kHz - 90 - V Ripple Rejection RR f = 120Hz, -18.5V VI -28.5V TJ = +25C 34 39 - dB Dropout Voltage VD TJ = +25C - 1.7 - V Quiescent Current Change Output Noise Voltage Note: 1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 5 MC79LXXA/LM79LXXA Electrical Characteristics(MC79L18A) (Continued) (VI = -27V, IO = 40mA, CI = 0.33F, CO = 0.1F, 0C TJ +125C, unless otherwise specified) Parameter Symbol Output Voltage Conditions VO TJ = +25C Line Regulation (Note1) VO TJ = +25C Load Regulation (Note1) VO TJ = +25C Output Voltage VO Quiescent Current IQ Min. Typ. Max. -17.3 -18.0 -18.7 Unit V -20.7V VI -33V - - 325 mV -21V VI -33V - - 275 mV 1.0mA IO 100mA - - 170 mV 1.0mA IO 40mA - - 85 mV -20.7V > VI > -33V, 1.0mA IO 40mA -17.1 - -18.9 V VI = -27V, 1.0mA IO 70mA V -17.1 - -18.9 TJ = +25C - - 6.5 TJ = +125C - - 6.0 mA With Line IQ -21V VI -33V - - 1.5 mA With Load IQ 1.0mA IO 40mA - - 0.1 mA VN TA =+25C,10Hz f 100kHz - 150 - V Ripple Rejection RR f = 120Hz, -23V VI -33V TJ = +25C 33 48 - dB Dropout Voltage VD TJ = +25C - 1.7 - V Quiescent Current Change Output Noise Voltage Note: 1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 6 MC79LXXA/LM79LXXA Electrical Characteristics(MC79L24A) (Continued) (VI = -33V, IO = 40mA, CI = 0.33F, CO = 0.1F, 0C TJ +125C, unless otherwise specified) Parameter Symbol Output Voltage Conditions Min. Typ. Max. Unit -23 -24 -25 V -27V VI -38V - - 350 mV -28V VI -38V - - 300 mV 1.0mA IO 100mA - - 200 mV 1.0mA IO 40mA - - 100 mV -27V VI -38V, 1.0mA IO 40mA -22.8 - -25.2 V VI = -33V, 1.0mA IO 70mA V VO TJ = +25C Line Regulation (Note1) VO TJ = +25C Load Regulation (Note1) VO TJ = +25C Output Voltage VO Quiescent Current IQ -22.8 - -25.2 TJ = +25C - - 6.5 TJ = +125C - - 6.0 mA With Line IQ -28V VI -38V - - 1.5 mA With Load IQ 1.0mA IO 40mA - - 0.1 mA VN TA = +25C,10Hz f 100kHz - 200 - V Ripple Rejection RR f = 120Hz, -29V VI -35V TJ = +25C 31 47 - dB Dropout Voltage VD TJ = +25C - 1.7 - V Quiescent Current Change Output Noise Voltage Note: 1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 7 MC79LXXA/LM79LXXA Typical Application Design Considerations The MC79LXXA/LM79LXXA 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 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 all load conditions. A 0.33F or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulator's input terminals. Normally good construction techniques 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. LM78LXXA MC78LXXA I MC79LXXA LM79LXXA LM79LXXA MC79LXXA Figure 1. Positive And Negative Regulator Figure 2. Typical Application A common ground is required between the Input and the output voltages. The input voltage must remain typically 2.0V above the output voltage even during the low point on the input ripple voltage. * C1 is required if regulator is located an appreciable distance from power supply filter. * CO improves stability and transient response. 8 MC79LXXA/LM79LXXA Mechanical Dimensions Package Dimensions in millimeters TO-92 +0.25 4.58 0.20 4.58 -0.15 14.47 0.40 0.46 0.10 1.27TYP [1.27 0.20] 1.27TYP [1.27 0.20] +0.10 0.38 -0.05 (0.25) +0.10 0.38 -0.05 1.02 0.10 3.86MAX 3.60 0.20 (R2.29) 9 MC79LXXA/LM79LXXA Mechanical Dimensions (Continued) Package Dimensions in millimeters 8-SOP MIN #5 6.00 0.30 0.236 0.012 10 MAX0.10 MAX0.004 8 0~ +0.10 0.15 -0.05 +0.004 0.006 -0.002 0.50 0.20 0.020 0.008 1.80 MAX 0.071 3.95 0.20 0.156 0.008 5.72 0.225 0.41 0.10 0.016 0.004 #4 1.27 0.050 #8 5.13 MAX 0.202 #1 4.92 0.20 0.194 0.008 ( 0.56 ) 0.022 1.55 0.20 0.061 0.008 0.1~0.25 0.004~0.001 MC79LXXA/LM79LXXA Mechanical Dimensions (Continued) Package Dimensions in millimeters SOT-89 1.50 0.20 4.50 0.20 (0.40) (1.10) 2.50 0.20 C0.2 4.10 0.20 (0.50) 1.65 0.10 0.50 0.10 0.40 0.10 0.40 +0.10 -0.05 1.50 TYP 1.50 TYP 11 MC79LXXA/LM79LXXA Ordering Information Product Number Package Operating Temperature LM79L05ACZ TO-92 0 ~ +125C Product Number Package Operating Temperature MC79L05ACP MC79L08ACP MC79L12ACP MC79L15ACP TO-92 MC79L18ACP 0 ~ +125C MC79L24ACP MC79L05ACD MC79L15ACD MC79L05ACH 8-SOP SOT-89 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 12/11/02 0.0m 001 Stock#DSxxxxxxxx 2002 Fairchild Semiconductor Corporation