Datasheet MC 79L05 ACPG Datasheet

ON Semiconductor

MC79L00,

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
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

MC79L00A Series

THREE–TERMINAL LOW

CURRENT NEGATIVE FIXED

VOLTAGE REGULATORS

SEMICONDUCTOR

TECHNICAL DATA

P SUFFIX

PLASTIC PACKAGE

CASE 29

Pin 1. Ground

8

2. Input

3. Output

1

Pin 1. V

2. V

3. V

4. NC

PLASTIC PACKAGE

out
in
in

1

2

3

D SUFFIX

CASE 751

(SOP–8)*

5. GND

6. V

in

7. V

in

8. NC

Representative Schematic Diagram

Q4

Q5

R8

Q10

Q6

Q8R9Q14

Q9

C

R10 R11

Q12

Q7Q2Q11

R14 R15

R6

R
5

R18

R1

R7

Q1

R4

R2

Z1

R3

*Automotive 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.

R17

R16

Q13

Gnd

Output

Input

*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 modifica­tion 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 t h e
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

Operating

Device

MC79LXXACD*

MC79LXXABD*
MC79LXXABP*

XX indicates nominal voltage

Temperature Range

T

= 0° to +125°C

J

TJ = –40° to +125°C

Package

SOP–8
Plastic PowerMC79LXXACP
Plastic PowerMC79LXXCP

SOP–8
Plastic Power

 Semiconductor Components Industries, LLC, 2002

January, 2002 – Rev. 4

1 Publication Order Number:

MC79L00/D

MC79L00, MC79L00A Series

MAXIMUM RATINGS (T

= +25°C, unless otherwise noted.)

A

Rating Symbol Value Unit

Input Voltage (–5 V)

Input Voltage (–12, –15, –18 V)
Input Voltage (–24 V)

Storage Temperature Range T
Junction Temperature T

ELECTRICAL CHARACTERISTICS (V

= –10 V , IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAB),

I

V

I

–30

Vdc
–35
–40

stg

J

–65 to +150 °C

+150 °C

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) V
Input Regulation (TJ = +25°C)

Reg
–7.0 Vdc ≥ VI ≥ –20 Vdc
–8.0 Vdc ≥ VI ≥ –20 Vdc

Load Regulation

Reg

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

O

line

load

V

O

I

IB

I

IB

V

n

–4.6 –5.0 –5.4 –4.8 –5.0 –5.2 Vdc

–
–

–
–

–4.5
–4.5

–
–

–
–

–
–

–
–

–
–

–
–

–
–

200
150

60
30

–5.5
–5.5

6.0

5.5

1.5

0.2

–
–

–
–

–4.75
–4.75

–
–

–
–

–
–

–
–

–
–

–
–

–
–

150
100

60
30

–5.25
–5.25

6.0

5.5

1.5

0.1

– 40 – – 40 – µV

(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

Ripple Rejection

RR 40 49 – 41 49 – dB

(–8.0 ≥ VI ≥ –18 Vdc, f = 120 Hz, TJ = +25°C)

Dropout Voltage (IO = 40 mA, TJ = +25°C) |VI–VO| – 1.7 – – 1.7 – Vdc

ELECTRICAL CHARACTERISTICS (V

= –19 V , IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAC),

I

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) V
Input Regulation

Reg

O

line

–11.1 –12 –12.9 –11.5 –12 –12.5 Vdc

(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

Reg

load

V

O

I

IB

I

IB

V

n

–
–

–
–

–10.8
–10.8

–
–

–
–

–
–

–
–

–
–

–
–

–
–

250
200

100

50

–13.2
–13.2

6.5

6.0

1.5

0.2

–
–

–
–

–11.4
–11.4

–
–

–
–

–
–

–
–

–
–

–
–

–
–

250
200

100

50

–12.6
–12.6

6.5

6.0

1.5

0.2

– 80 – – 80 – µV

(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

Ripple Rejection

RR 36 42 – 37 42 – dB

(–15 ≤ VI ≤ –25 Vdc, f = 120 Hz, TJ = +25°C)

Dropout Voltage (IO = 40 mA, TJ = +25°C) |VI–VO| – 1.7 – – 1.7 – Vdc

mV

mV

Vdc

mA

mA

mV

mV

Vdc

mA

mA

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2

MC79L00, MC79L00A Series

ELECTRICAL CHARACTERISTICS (V

= –23 V , IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, –40°C < TJ +125°C (for MC79LXXAB),

I

0°C < TJ < +125°C (for MC79LXXAC)).

Characteristics Symbol Min Typ Max Min Typ Max Unit

Output Voltage (TJ = +25°C) V
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

ELECTRICAL CHARACTERISTICS (V

= –27 V , IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 0°C < TJ > +125°C, unless otherwise noted).

I

Characteristics Symbol Min Typ Max Min Typ Max Unit

Output Voltage (TJ = +25°C) V
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

MC79L15C MC79L15AC, AB

line

–13.8 –15 –16.2 –14.4 –15 –15.6 Vdc

mV

–
–

–
–

300
250

–
–

–
–

300
250

mV
–
–

–
–

150

75

–
–

–
–

150

75

Vdc
–13.5
–13.5

–

–16.5

–

–16.5

–14.25
–14.25

–

–15.75

–

–15.75

mA
–
–

–
–

6.5

6.0

–
–

–
–

6.5

6.0
mA

–
–

–
–

1.5

0.2

–
–

–
–

1.5

0.1

– 90 – – 90 – µV

Reg

Reg

O

load

V

O

I

IB

∆I

IB

V

N

RR 33 39 – 34 39 – dB

|VI–VO| – 1.7 – – 1.7 – Vdc

MC79L18C MC79L18AC

line

–16.6 –18 –19.4 –17.3 –18 –18.7 Vdc

–
–
–
–

–
–

–
–16.2
–16.2

–
–

–
–
–

–
–
–
–

–
–

–
–
–

–
–

–
–
–

–
325
275

–

170

85

–

–19.8
–19.8

6.5

6.0

–

1.5

0.2

–
–
–
–

–
–

–17.1

–

–17.1

–
–

–
–
–

–
–
–
–

–
–

–
–
–

–
–

–
–
–

325

–
–

275

170

85

–18.9

–

–18.9

6.5

6.0

1.5
–

0.1

– 150 – – 150 – µV

mV

mV

Vdc

mA

mA

Reg

Reg

O

load

V

O

I

IB

I

IB

V

n

RR 32 46 – 33 48 – dB

|VI–V

O|

– 1.7 – – 1.7 – Vdc

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3

MC79L00, MC79L00A Series

ELECTRICAL CHARACTERISTICS (V

Characteristics Symbol Min Typ Max Min Typ Max Unit

Output Voltage (TJ = +25°C) V
Input Regulation

(TJ = +25°C)
–27 Vdc ≥ VI ≥ –38 Vdc
–27.5 Vdc ≥ VI ≥ –38 Vdc
–28 Vdc ≥ VI ≥ –38 Vdc

Load Regulation

TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA

1.0 mA ≤ IO ≤ 40 mA

Output Voltage

–27 Vdc ≥ VI ≥ –38 V, 1.0 mA ≤ IO ≤ 40 mA
–28 Vdc ≥ VI ≥ –38 Vdc, 1.0 mA ≤ IO ≤ 40 mA
VI = –33 Vdc, 1.0 mA ≤ IO ≤ 70 mA

Input Bias Current

(TJ = +25°C)
(TJ = +125°C)

Input Bias Current Change

–28 Vdc ≥ VI ≥ –38 Vdc

1.0 mA ≤ IO ≤ 40 mA

Output Noise Voltage

(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

Ripple Rejection

(–29 ≤ VI ≤ –35 Vdc, f = 120 Hz, TJ = +25°C)

Dropout Voltage

IO = 40 mA, TJ = +25°C

= –33 V , IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 0°C < TJ < +125°C, unless otherwise noted).

I

MC79L24C MC79L24AC

line

–22.1 –24 –25.9 –23 –24 –25 Vdc

mV

–
–
–

–
–

–
–21.4
–21.4

–

–

–

–

– 200 – – 200 – µV

–
–
–

–
–

–
–
–

–
–

–
–

–
350
300

200
100

–

–26.4
–26.4

6.5

6.0

1.5

0.2

–
–
–

–
–

–22.8

–

–22.8

–
–

–
–

–
–
–

–
–

–
–
–

–
–

–
–

350

–

300

mV
200
100

Vdc

–25.2

–

–25.2

mA

6.5

6.0
mA

1.5

0.1

O

Reg

Reg

load

V

O

I

IB

∆I

IB

V

n

RR 30 43 – 31 47 – dB

|VI–VO| – 1.7 – – 1.7 – Vdc

APPLICATIONS INFORMATION

Design Considerations

The MC79L00, A Series of fixed voltage regulators are
designed with Thermal Overload Protections 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 length, or if the output load capacitance is large. An
input bypass capacitor should be selected to provide good

+V

-V

in

0.33µF

in

0.33µF

MC78LXX

MC79LXX

0.1µF

0.1µF

+V

-V

O

O

high–frequency characteristics to insure 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. 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.

Input Output

CI*

0.33µF

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 ripple voltage.

* CI is required if regulator is located an appreciable

* distance from the power supply filter

MC79LXX

CO**

0.1µF

** CO improves stability and transient response.

Figure 1. Positive and Negative Regulator Figure 2. Standard Application

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4

MC79L00, MC79L00A Series

TYPICAL CHARACTERISTICS

(TA = +25°C, unless otherwise noted.)

8.0

MC79L05C
VO = -5.0 V

6.0

T

= 25°C

J

IO = 1.0 mA IO = 100 mA

4.0

, OUTPUT VOLTAGE (V)

O

2.0

0

0 -2.0 -4.0 -6.0 -0.8 -10

IO = 40 mA

Vin, INPUT VOLTAGE (V)

Figure 3. Dropout Characteristics Figure 4. Dropout Voltage versus

4.2

4.0

3.8

3.6

3.4

MC79L05C

3.2

, INPUT BIAS CURRENT (mA) V
I

Vin = -10 V

IB

VO = -5.0 V

3.0

IO = 40 mA

-2.5

-2.0

-1.5

-1.0

VOLTAGE (V)

, INPUT/OUTPUT DIFFERENTIAL

-VV
IO

Dropout of Regulation is
defined when

-0.5

∆V

= 2% of V

O

0

0 25 50 75 100 125

O

T

, JUNCTION TEMPERATURE (°C)

J

Junction Temperature

5.0

4.0

3.0

2.0

, INPUT BIAS CURRENT (mA)

IB

I

1.0

IO = 70 mA

IO = 40 mA

IO = 1.0 mA

MC79L05C
VO = -5.0 V
IO = 40 mA

0

0 25 50 75 100 125

T

, AMBIENT TEMPERATURE (°C)

A

Figure 5. Input Bias Current versus

Ambient Temperature

10,000

1,000

No Heatsink

100

, POWER DISSIPATION (mW)

D

P

R

= 200°C/W

Θ

JA

P

to 25°C = 625 mW

D(max)

10

25 50 75 100 125 150

T

, AMBIENT TEMPERATURE (°C)

A

Figure 7. Maximum Average Power Dissipation

versus Ambient Temperature (TO–92)

0

0 -5.0 -10 -15 -20 -25 -30 -35 -40

Vin, INPUT VOLTAGE (V)

Figure 6. Input Bias Current versus

Input Voltage

170

150

P

D(max)

for T

= +50°C

A

130

, THERMAL RESISTANCE

JA

JUNCTION-TO-AIR ( C/W)°

θ

R

110

90

70

50

30

02030504010

R

θ

JA

Graph represents symmetrical layout

2.0 oz.

L

Copper

L, LENGTH OF COPPER (mm)

Figure 8. SOP–8 Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

3.2

2.8

2.4

2.0

1.6

1.2

3.0 mmL

0.8
, MAXIMUM POWER DISSIPATION (W)

D

P

0.4

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5

MC79L00, MC79L00A Series

PACKAGE DIMENSIONS

P SUFFIX

PLASTIC PACKAGE

CASE 29–11

ISSUE AL

SEATING
PLANE

A

B

R

P

L

K

XX

V

1

G

H

C

N

D

J

SECTION X–X

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.

4. LEAD DIMENSION IS UNCONTROLLED IN P AND
BEYOND DIMENSION K MINIMUM.

DIM MIN MAX MIN MAX

A 0.175 0.205 4.45 5.20
B 0.170 0.210 4.32 5.33
C 0.125 0.165 3.18 4.19
D 0.016 0.021 0.407 0.533
G 0.045 0.055 1.15 1.39
H 0.095 0.105 2.42 2.66
J 0.015 0.020 0.39 0.50
K 0.500 --- 12.70 ---
L 0.250 --- 6.35 ---
N 0.080 0.105 2.04 2.66
P --- 0.100 --- 2.54
R 0.115 --- 2.93 ---
V 0.135 --- 3.43 ---

MILLIMETERSINCHES

N

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6

MC79L00, MC79L00A Series

PACKAGE DIMENSIONS

D SUFFIX

PLASTIC PACKAGE

CASE 751–07

ISSUE W

–Y–

–Z–

–X–

A

58

B

1

S

0.25 (0.010)

4

M

M

Y

K

G

C

SEATING
PLANE

0.10 (0.004)

H

D

0.25 (0.010) Z

M

Y

SXS

N

X 45



M

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER
SIDE.

5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN
EXCESS OF THE D DIMENSION AT MAXIMUM
MATERIAL CONDITION.

MILLIMETERS

DIMAMIN MAX MIN MAX

4.80 5.00 0.189 0.197

B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.053 0.069
D 0.33 0.51 0.013 0.020

G 1.27 BSC 0.050 BSC

H 0.10 0.25 0.004 0.010

J

J 0.19 0.25 0.007 0.010
K 0.40 1.27 0.016 0.050

M 0 8 0 8



N 0.25 0.50 0.010 0.020
S 5.80 6.20 0.228 0.244

INCHES

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MC79L00, MC79L00A Series

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MC79L00/D

8