MC79L05A / LM79L05A 3-Terminal 0.1 A Negative Voltage Regulator Features Description • • • • • • These regulators employ internal current limiting and thermal shutdown. Output Current up to 100 mA No External Components Internal Thermal Over load Protection Internal Short-Circuit Current Limiting Output Voltage Offered in ±5% Tolerance Output Voltage: -5 V TO-92 SOT-89 1 1 1.GND 2.Input 3.Output Ordering Information Operating Temperature Range Part Number Top Mark Package Packing Method 9A SOT-89 Tape and Reel MC79L05ACP TO-92 Bulk LM79L05ACZ TO-92 Bulk MC79L05ACHX MC79L05ACP 0 ~ +125°C LM79L05ACZ 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 R16 R17 Q8 Q1 R7 D1 R1 R6 R2 R3 R27 Output Q2Q3 R4 R5 Input Figure 1. Block Diagram © 2004 Fairchild Semiconductor Corporation MC79L05A / LM79L05A Rev. 1.1.0 www.fairchildsemi.com 1 MC79L05A / LM79L05A — 3-Terminal 0.1 A Negative Voltage Regulator December 2012 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted. Symbol VI Parameter Value Input Voltage TOPR Operating Temperature Range TSTG Storage Temperature Range Unit -30 V 0 ~ +125 °C -65 ~ +150 °C Electrical Characteristics VI = -10 V, IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF, 0°C ≤ TJ ≤ +125°C, unless otherwise specified. Symbol VO ΔVO ΔVO Parameter TJ = +25°C Line Regulation (1) TJ =+25°C Load Regulation (1) VO Output Voltage IQ Quiescent Current ΔIQ Conditions Output Voltage Min. Typ. Max. Unit -4.8 -5.0 -5.2 V 15 150 mV -7.0 V ≥ VI ≥ -20 V -8 V ≥ VI ≥ -20 V 100 mV 1.0 mA ≤ IO ≤ 100 mA 20 60 mV 1.0 mA ≤ IO ≤ 40 mA 10 30 mV -7.0 V ≥ VI ≥ -20 V, 1.0 mA ≤ IO ≤ 40 mA -4.75 -5.25 V VI = -10 V, 1.0 mA ≤ IO ≤ 70 mA -5.25 V TJ =+25°C -4.75 TJ = +25°C With Line 2.0 5.5 mA TJ = +125°C 6.0 -8 V ≥ VI ≥ -20 V 1.5 mA 0.1 mA ΔIQ Quiescent Current Change VN Output Noise Voltage TA = +25°C,10 Hz ≤ f ≤ 100 kHz RR Ripple Rejection f = 120 Hz, -8 V ≥ VI ≥ -18 V, TJ = +25°C VD Dropout Voltage TJ = +25°C With Load 1.0 mA ≤ IO ≤ 40 mA 41 30 μV 60 dB 1.7 V Note: 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. © 2004 Fairchild Semiconductor Corporation MC79L05A / LM79L05A Rev. 1.1.0 www.fairchildsemi.com 2 MC79L05A / LM79L05A — 3-Terminal 0.1 A Negative Voltage Regulator Absolute Maximum Ratings Design Considerations The MC79L05A / LC79L05A 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 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 ensure stable operation under all load conditions. A 0.33 μF 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. 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. LM78L05A MC78L05A I MC79L05A LM79L05A LM79L05A MC79L05A Figure 2. Positive And Negative Regulator Figure 3. Typical Application 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. * CI is required if regulator is located an appreciable distance from power supply filter. ** CO improves stability and transient response. © 2004 Fairchild Semiconductor Corporation MC79L05A / LM79L05A Rev. 1.1.0 www.fairchildsemi.com 3 MC79L05A / LM79L05A — 3-Terminal 0.1 A Negative Voltage Regulator Typical Application MC79L05A / LM79L05A — 3-Terminal 0.1 A Negative Voltage Regulator Physical Dimensions SOT-89 4.70 C 4.30 1.87 C 1.50 1.40 A B CL SYMM 2.70 C 2.30 4.50 C 3.90 1.30 0.89 2.23 MIN 0.50 X 45° 0.30 X 45° 1 2 5.30 MIN 90° 3 2.00 MIN 0.52 (2X) C 0.30 0.10 M C A B 0.54 1.50 1 2 0.90 MIN 2X 3.00 3 0.96 MIN 1.50 1.70 C 1.30 3.00 MIN LAND PATTERN RECOMMENDATION SEATING PLANE C 0.35 0.60 C 0.40 3 0.50 0.35 1 2.29 2.13 2.70 NOTES: UNLESS OTHERWISE SPECIFIED. A. REFERENCE TO JEDEC TO-243 VARIATION AA. B. ALL DIMENSIONS ARE IN MILLIMETERS. C DOES NOT COMPLY JEDEC STANDARD VALUE. D. DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH AND TIE BAR PROTRUSION. E. DIMENSION AND TOLERANCE AS PER ASME Y14.5-1994. F. DRAWING FILE NAME: MA03CREV2 Figure 4. 3-Lead, SOT-89, JEDEC TO-243, Option AA Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/products/discrete/pdf/sot89_tr.pdf. © 2004 Fairchild Semiconductor Corporation MC79L05A / LM79L05A Rev. 1.1.0 www.fairchildsemi.com 4 MC79L05A / LM79L05A — 3-Terminal 0.1 A Negative Voltage Regulator Physical Dimensions (Continued) TO-92 Bulk Type D Figure 5. 3-Lead, TO-92, Molded, Standard Straight Lead Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2004 Fairchild Semiconductor Corporation MC79L05A / LM79L05A Rev. 1.1.0 www.fairchildsemi.com 5 TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks. 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