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MC79LXXA/LM79LXXA
3-Terminal 0.1A Negative Voltage Regulator
Features
• • • • • • 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
Description
These regulators employ internal current limiting and thermal shutdown, making them essentially indestructible.
TO-92 SOT-89
1 1
1.GND 2.Input 3.Output 8-SOP
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1. Output 2.3.6.7. Input 5. GND 4.8. NC
Internal Block Diagram
GND R26 Q10 Q12 Q11 D3 D2 R22 R23+R21 Q6 R18 Q4 Q15 Q16 Q14 R28 R24 Q13 R25 R29 Q17 Q9 R7 C1 R16 R17 Q8 Q1 R1 R2 D1 R6 R3 R4 R5 Input Q7 R Q2Q3 Output Q5 R15
R27
Rev. 1.0.2
©2002 Fairchild Semiconductor Corporation
MC79LXXA/LM79LXXA
Absolute Maximum Ratings
Parameter Input Voltage (for Vo = -5V to -8V) (for VO = -12V to -18V) (for VO = -24V) Operating Temperature Range Storage Temperature Range Symbol VI TOPR TSTG Value -30 -35 -40 0 ~ +125 -65 ~ +150 Unit V °C °C
Electrical Characteristics(MC79L05A/LM79L05A)
(VI = -10V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤TJ ≤ +125°C, unless otherwise specified) Parameter Output Voltage Line Regulation (Note1) Symbol VO ∆VO ∆VO VO IQ With Line With Load ∆ IQ ∆ IQ VN RR VD TJ = +25°C TJ =+25°C TJ =+25°C -7.0V ≥ VI ≥ -20V -8V ≥ VI ≥ -20V 1.0mA ≤ IO ≤ 100mA 1.0mA ≤ IO ≤ 40mA Conditions Min. -4.8 -4.75 -4.75 41 Typ. -5.0 15 20 10 2.0 30 60 1.7 Max. -5.2 150 100 60 30 -5.25 -5.25 5.5 6.0 1.5 0.1 Unit V mV mV mV mV V V mA mA mA µV dB V
Load Regulation (Note1) Output Voltage Quiescent Current Quiescent Current Change Output Noise Voltage Ripple Rejection Dropout Voltage
-7.0V ≥ VI ≥ -20V, 1.0mA ≤ IO ≤ 40mA VI = -10V, 1.0mA ≤ IO ≤ 70mA TJ =+25°C TJ = +125°C -8V ≥ VI ≥ -20V 1.0mA ≤ IO ≤ 40mA TA = +25°C,10Hz ≤ f ≤ 100kHz f = 120Hz, -8V ≥ VI ≥ -18V TJ = +25°C TJ = +25°C
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.
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MC79LXXA/LM79LXXA
Electrical Characteristics (MC79L08A) (Continued)
(VI = -14V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤TJ ≤ +125°C, unless otherwise specified) Parameter Output Voltage Line Regulation(Note1) Symbol VO ∆VO ∆VO VO Iq With Line With Load ∆IQ VN RR VD TJ = +25°C TJ = +25°C TJ = +25°C -10.3V ≥ VI ≥ -23V -12V ≥ VI ≥ -23V 1.0mA ≤ Io ≤ 100mA 1.0mA ≤ Io ≤ 40mA Conditions Min. -7.7 -7.6 -7.6 39 Typ. -8.0 50 55 1.7 Max. Unit -8.3 175 125 80 40 -8.4 -8.4 6.0 5.5 1.5 0.1 V mV mV mV mV V mA mA mA µV dB V
Load Regulation (Note1) Output Voltage Quiescent Current Quiescent Current Change Output Noise Voltage Ripple Rejection Dropout Voltage
-10.3V ≥ VI ≥ -23V, 1.0mA ≤ Io ≤ 40mA VI = -14V, 1.0mA ≤ Io ≤ 70mA Tj = +25°C Tj = +125°C -11.7V ≥ VI ≥ -23V 1.0mA ≤ Io ≤ 40mA Tj = +25°C,10Hz ≤ f ≤ 100kHz f = 120Hz, -11V ≥ VI ≥ -21V Tj = +25°C Tj = +25°C
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.
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MC79LXXA/LM79LXXA
Electrical Characteristics(MC79L12A) (Continued)
(VI = -19V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤TJ ≤ +125°C, unless otherwise specified) Parameter Output Voltage Line Regulation (Note1) Symbol VO ∆VO ∆VO VO IQ With Line With Load ∆ IQ ∆ IQ VN RR VD TJ = +25°C TJ = +25°C TJ = +25°C -14.5V ≥ VI ≥ -27V -16V ≥ VI ≥ -27V 1.0mA ≤ IO ≤ 100mA 1.0mA ≤ IO ≤ 40mA Conditions Min. -11.4 37 Typ. 80 42 1.7 Max. 250 200 100 50 -12.6 -12.6 6.0 6.5 1.5 0.1 Unit V mV mV mV mV V V mA mA mA µV dB V
-11.5 -12.0 -12.5
Load Regulation (Note1) Output Voltage Quiescent Current Quiescent Current Change Output Noise Voltage Ripple Rejection Dropout Voltage
-14.5V > VI > -27V, 1.0mA ≤ IO ≤ 40mA -11.4 VI = -19V, 1.0mA ≤ IO ≤ 70mA TJ = +25°C TJ = +125°C -16V ≥ VI ≥ -27V 1.0mA ≤ IO ≤ 40mA TA = +25°C,10Hz ≤ f ≤ 100kHz f = 120Hz, -15V≥ VI ≥ -25V TJ = +25°C TJ = +25°C
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.
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MC79LXXA/LM79LXXA
Electrical Characteristics(MC79L15A) (Continued)
(VI = -23V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤TJ ≤ +125°C, unless otherwise specified) Parameter Output Voltage Line Regulation (Note1) Symbol VO ∆ VO ∆ VO VO IQ With Line With Load ∆IQ ∆IQ VN RR VD TJ = +25°C TJ = +25°C TJ = +25°C -17.5V ≥ VI ≥ -30V -20V ≥ VI ≥ -30V 1.0mA ≤ IO ≤ 100mA 1.0mA ≤ IO ≤ 40mA Conditions Min. -14.25 34 Typ. 90 39 1.7 Max. 300 250 150 75 -15.75 -15.75 6.0 6.5 1.5 0.1 Unit V mV mV mV mV V V mA mA mA µV dB V
-14.4 -15.0 -15.6
Load Regulation (Note1) Output Voltage Quiescent Current Quiescent Current Change Output Noise Voltage Ripple Rejection Dropout Voltage
-17.5V ≥ VI ≥ -30V, 1.0mA ≤ IO ≤ 40mA -14.25 VI = -23V, 1.0mA ≤ IO ≤ 70mA TJ = +25°C TJ = +125°C -20V ≥ VI .