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ON Semiconductort
100 mA Negative Voltage
Regulators
The MC79L00, A Series negative voltage regulators are
inexpensive, easy–to–use devices suitable for numerous applications
requiring up to100 mA. Like the higher powered MC7900 Series
negative regulators, this series features thermal shutdown and current
limiting, making them remarkably rugged. In most applications, no
external components are required for operation.
The MC79L00 devices are useful for on–card regulation or any
other application where a regulated negative voltage at a modest
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current level is needed. These regulators offer substantial advantage
over the common resistor/zener diode approach.
No External Components Required
Internal Short Circuit Current Limiting
Internal Thermal Overload Protection
Low Cost
Complementary Positive Regulators Offered (MC78L00 Series)
Available in Either ±5% (AC) or ±10% (C) Selections
MC79L00,
MC79L00A Series
THREE–TERMINAL LOW
CURRENT NEGATIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29
Pin 1. Ground
2. Input
3. Output
1
2
3
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP–8)*
Pin 1. Vout
2. Vin
3. Vin
4. NC
5. GND
6. Vin
7. Vin
8. NC
Representative Schematic Diagram
R R6
R8
Q10
5 Q5
R18
R1
Q4
R9
Gnd
R17
R7
Q1
R2
Z1
R3
R4
Q8 Q14
Q9
R16
Output
Q12
C Q2
Q13
Q6 Q7
R10 R11
Q11
R14 R15
Input
*ĂAutomotive temperature range selections are available with special test conditions
and additional tests in 5, 12 and 15 V devices. Contact your local ON Semiconductor
sales office for information.
*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 modifica-
tion decreases package thermal resistance and
increases power dissipation capability when
appropriately mounted on a printed circuit board.
SOP–8 conforms to all external dimensions of the
standard SO–8 package.
Device No.
±10%
MC79L05C
MC79L12C
MC79L15C
MC79L18C
MC79L24C
Device No.
5%
MC79L05AC
MC79L12AC
MC79L15AC
MC79L18AC
MC79L24AC
Nominal
Voltage
–5.0
–12
–15
–18
–24
ORDERING INFORMATION
Device
MC79LXXACD*
Operating
Temperature Range
MC79LXXACP
MC79LXXCP
MC79LXXABD*
MC79LXXABP*
TJ = 0° to +125°C
TJ = –40° to +125°C
XX indicates nominal voltage
Package
SOP–8
Plastic Power
Plastic Power
SOP–8
Plastic Power
© Semiconductor Components Industries, LLC, 2002
January, 2002 – Rev. 4
1
Publication Order Number:
MC79L00/D

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MC79L00, MC79L00A Series
MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.)
Rating
Symbol
Value
Unit
Input Voltage (–5 V)
Input Voltage (–12, –15, –18 V)
Input Voltage (–24 V)
VI –30 Vdc
–35
–40
Storage Temperature Range
Junction Temperature
Tstg –65 to +150
TJ +150
°C
°C
ELECTRICAL CHARACTERISTICS (VI = –10 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAB),
0°C < TJ < +125°C (for MC79LXXAC)).
MC79L05C, AB
MC79L05AC, AB
Characteristics
Symbol Min Typ Max Min Typ Max Unit
Output Voltage (TJ = +25°C)
Input Regulation (TJ = +25°C)
–7.0 Vdc VI –20 Vdc
www.DataSheet4U.com8.0 Vdc VI –20 Vdc
Load Regulation
TJ = +25°C, 1.0 mA IO 100 mA
1.0 mA IO 40 mA
Output Voltage
–7.0 Vdc VI –20 Vdc, 1.0 mA IO 40 mA
VI = –10 Vdc, 1.0 mA IO 70 mA
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
Input Bias Current Change
–8.0 Vdc VI –20 Vdc
1.0 mA IO 40 mA
Output Noise Voltage
(TA = +25°C, 10 Hz f 100 kHz)
VO
Regline
–4.6 –5.0 –5.4 –4.8 –5.0 –5.2
– – 200 – – 150
– – 150 – – 100
Vdc
mV
Regload
– 60 –
– 30 –
mV
– 60
– 30
VO Vdc
–4.5 – –5.5 –4.75 – –5.25
–4.5 – –5.5 –4.75 – –5.25
IIB mA
– – 6.0 – – 6.0
– – 5.5 – – 5.5
IIB mA
– – 1.5 – – 1.5
– – 0.2 – – 0.1
Vn
– 40 –
– 40 – µV
Ripple Rejection
(–8.0 VI –18 Vdc, f = 120 Hz, TJ = +25°C)
RR 40 49 – 41 49 – dB
Dropout Voltage (IO = 40 mA, TJ = +25°C)
|VI–VO|
1.7
– 1.7 – Vdc
ELECTRICAL CHARACTERISTICS (VI = –19 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAC),
0°C < TJ < +125°C (for MC79LXXAB)).
MC79L12C, AB
MC79L12AC, AB
Characteristics
Symbol Min Typ Max Min Typ Max Unit
Output Voltage (TJ = +25°C)
Input Regulation
(TJ = +25°C)
–14.5 Vdc VI –27 Vdc
–16 Vdc VI –27 Vdc
Load Regulation
TJ = +25°C, 1.0 mA IO 100 mA
1.0 mA IO 40 mA
Output Voltage
–14.5 Vdc VI –27 Vdc, 1.0 mA IO 40 mA
VI = –19 Vdc, 1.0 mA IO 70 mA
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
Input Bias Current Change
–16 Vdc VI –27 Vdc
1.0 mA IO 40 mA
Output Noise Voltage
(TA = +25°C, 10 Hz f 100 kHz)
VO –11.1 –12 –12.9 –11.5 –12 –12.5 Vdc
Regline
mV
– – 250 – – 250
– – 200 – – 200
Regload
– 100 –
– 50 –
mV
– 100
– 50
VO Vdc
–10.8 – –13.2 –11.4 – –12.6
–10.8 – –13.2 –11.4 – –12.6
IIB mA
– – 6.5 – – 6.5
– – 6.0 – – 6.0
IIB mA
– – 1.5 – – 1.5
– – 0.2 – – 0.2
Vn
– 80 –
– 80 – µV
Ripple Rejection
(–15 VI –25 Vdc, f = 120 Hz, TJ = +25°C)
RR 36 42 – 37 42 – dB
Dropout Voltage (IO = 40 mA, TJ = +25°C)
|VI–VO|
1.7
– 1.7 – Vdc
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MC79L00, MC79L00A Series
ELECTRICAL CHARACTERISTICS (VI = –23 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAB),
0°C < TJ < +125°C (for MC79LXXAC)).
MC79L15C
MC79L15AC, AB
Characteristics
Symbol Min Typ Max Min Typ Max Unit
Output Voltage (TJ = +25°C)
Input Regulation
(TJ = +25°C)
–17.5 Vdc VI –30 Vdc
–20 Vdc VI –30 Vdc
Load Regulation
TJ = +25°C, 1.0 mA IO 100 mA
1.0 mA IO 40 mA
Output Voltage
–17.5 Vdc VI –Vdc, 1.0 mA IO 40 mA
www.DataSheet4U.coVmI = –23 Vdc, 1.0 mA IO 70 mA
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
Input Bias Current Change
–20 Vdc VI –30 Vdc
1.0 mA IO 40 mA
Output Noise Voltage
(TA = +25°C, 10 Hz f 100 kHz)
Ripple Rejection
(–18.5 VI –28.5 Vdc, f = 120 Hz)
VO –13.8 –15 –16.2 –14.4 –15 –15.6 Vdc
Regline
mV
– – 300 – – 300
– – 250 – – 250
Regload
– 150 –
– 75 –
mV
– 150
– 75
VO Vdc
–13.5 – –16.5 –14.25 – –15.75
–13.5 – –16.5 –14.25 – –15.75
IIB mA
– – 6.5 – – 6.5
– – 6.0 – – 6.0
IIB mA
– – 1.5 – – 1.5
– – 0.2 – – 0.1
VN
– 90 –
– 90 – µV
RR 33 39 – 34 39 – dB
Dropout Voltage
IO = 40 mA, TJ = +25°C
|VI–VO|
1.7
– 1.7 – Vdc
ELECTRICAL CHARACTERISTICS (VI = –27 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 0°C < TJ > +125°C, unless otherwise noted).
MC79L18C
MC79L18AC
Characteristics
Symbol Min Typ Max Min Typ Max Unit
Output Voltage (TJ = +25°C)
Input Regulation
(TJ = +25°C)
–20.7 Vdc VI –33 Vdc
–21.4 Vdc VI –33 Vdc
–22 Vdc VI –33 Vdc
–21 Vdc VI –33 Vdc
Load Regulation
TJ = +25°C, 1.0 mA IO 100 mA
1.0 mA IO 40 mA
Output Voltage
–20.7 Vdc VI –33 Vdc, 1.0 mA IO 40 mA
–21.4 Vdc VI –33 Vdc, 1.0 mA IO 40 mA
VI = –27 Vdc, 1.0 mA IO 70 mA
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
Input Bias Current Change
–21 Vdc VI –33 Vdc
–27 Vdc VI –33 Vdc
1.0 mA IO 40 mA
Output Noise Voltage
(TA = +25°C, 10 Hz f 100 kHz)
Ripple Rejection
(–23 VI –33 Vdc, f = 120 Hz, TJ = +25°C)
Dropout Voltage
IO = 40 mA, TJ = +25°C
VO –16.6 –18 –19.4 –17.3 –18 –18.7 Vdc
Regline
mV
Regload
VO
IIB
IIB
Vn
–16.2
–16.2
–––
– 325 –
– 275 –
–––
– 325
––
––
– 275
– 170 –
– 85 –
mV
– 170
– 85
Vdc
– – –17.1 – –18.9
– –19.8 – – –
– –19.8 –17.1 – –18.9
– 6.5 –
– 6.0 –
mA
– 6.5
– 6.0
–––
– 1.5 –
– 0.2 –
mA
– 1.5
––
– 0.1
150 –
– 150 –
µV
RR 32 46 – 33 48 – dB
|VI–VO|
1.7
– 1.7 – Vdc
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