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Order this document by MC79L00/D
Three-Terminal Low Current
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 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, A
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
Representative Schematic Diagram
R6
R
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 Q11
R10 R11
R14 R15
Input
* Automotive temperature range selections are available with special test conditions
* and additional tests in 5, 12 and 15 V devices. Contact your local Motorola sales
* office for information.
8
1
Pin 1. Vout
2. Vin
3. Vin
4. NC
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP–8)*
5. GND
6. Vin
7. Vin
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 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
Package
SOP–8
MC79LXXACP
MC79LXXCP
MC79LXXABD*
MC79LXXABP*
TJ = 0° to +125°C
TJ = –40° to +125°C
Plastic Power
Plastic Power
SOP–8
Plastic Power
XX indicates nominal voltage
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 2
1

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MC79L00, A 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
–8.0 Vdc VI –20 Vdc
VO –4.6 –5.0 –5.4 –4.8 –5.0 –5.2 Vdc
Regline
mV
– – 200 – – 150
– – 150 – – 100
Load Regulation
TJ = +25°C, 1.0 mA IO 100 mA
1.0 mA IO 40 mA
Regload
– 60 –
– 30 –
mV
– 60
– 30
Output Voltage
–7.0 Vdc VI –20 Vdc, 1.0 mA IO 40 mA
VI = –10 Vdc, 1.0 mA IO 70 mA
VO Vdc
–4.5 – –5.5 –4.75 – –5.25
–4.5 – –5.5 –4.75 – –5.25
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB mA
– – 6.0 – – 6.0
– – 5.5 – – 5.5
Input Bias Current Change
–8.0 Vdc VI –20 Vdc
1.0 mA IO 40 mA
IIB mA
– – 1.5 – – 1.5
– – 0.2 – – 0.1
Output Noise Voltage
(TA = +25°C, 10 Hz f 100 kHz)
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)
VO –11.1 –12 –12.9 –11.5 –12 –12.5 Vdc
Input Regulation
(TJ = +25°C)
–14.5 Vdc VI –27 Vdc
–16 Vdc VI –27 Vdc
Regline
– 250 –
– 200 –
mV
– 250
– 200
Load Regulation
TJ = +25°C, 1.0 mA IO 100 mA
1.0 mA IO 40 mA
Regload
– 100 –
– 50 –
mV
– 100
– 50
Output Voltage
–14.5 Vdc VI –27 Vdc, 1.0 mA IO 40 mA
VI = –19 Vdc, 1.0 mA IO 70 mA
VO Vdc
–10.8 – –13.2 –11.4 – –12.6
–10.8 – –13.2 –11.4 – –12.6
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB mA
– – 6.5 – – 6.5
– – 6.0 – – 6.0
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)
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
2 MOTOROLA ANALOG IC DEVICE DATA

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MC79L00, A 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
VI = –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)
Dropout Voltage
IO = 40 mA, TJ = +25°C
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
|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
–16.2
–16.2
IIB
IIB
Vn –
–––
– 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
MOTOROLA ANALOG IC DEVICE DATA
3