Datasheet MC79L12ABP, MC79L12BD, MC79L12ACD, MC79L12ACP, MC79L18BD Datasheet (Motorola)

 



THREE–TERMINAL LOW

CURRENT NEGATIVE FIXED

VOLTAGE REGULATORS

ORDERING INFORMATION

Order this document by MC79L00/D

P SUFFIX

PLASTIC PACKAGE

CASE 29

Pin 1. Ground

2. Input

3. Output

3

1

2

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SOP–8)*

1

8

Pin 1. V

out

2. V

in

3. V

in

4. NC

5. GND

6. V

in

7. V

in

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 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 the
standard SO–8 package.

Device No.

±10%

MC79L05C
MC79L12C
MC79L15C
MC79L18C
MC79L24C

Device No.

5%

Nominal

Voltage

MC79L05AC
MC79L12AC
MC79L15AC
MC79L18AC
MC79L24AC

–5.0

–12
–15
–18
–24

Device

Operating

Temperature Range

Package

MC79LXXACD*

TJ = 0° to +125°C

SOP–8
Plastic PowerMC79LXXACP
Plastic PowerMC79LXXCP

MC79LXXABD*
MC79LXXABP*

SOP–8
Plastic Power

TJ = –40° to +125°C

XX indicates nominal voltage

SEMICONDUCTOR

TECHNICAL DATA

1

MOTOROLA ANALOG IC DEVICE DATA

  
  

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

Representative Schematic Diagram

* 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.

R1

R2

Z1

R3

R
5

R18

Q1

R6

Q4

R7

R4

R8

Q5

Q10

Q8R9Q14

Q9

C

Q6

R10 R11

Q7Q2Q11

R14 R15

Q13

Q12

R16

R17

Gnd

Output

Input

 Motorola, Inc. 1996 Rev 2

MC79L00, A Series

2

MOTOROLA ANALOG IC DEVICE DATA

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)

V

I

–30
–35
–40

Vdc

Storage Temperature Range T

stg

–65 to +150 °C

Junction Temperature T

J

+150 °C

ELECTRICAL CHARACTERISTICS (V

I

= –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) V

O

–4.6 –5.0 –5.4 –4.8 –5.0 –5.2 Vdc

Input Regulation

(TJ = +25°C)
–7.0 Vdc ≥ VI ≥ –20 Vdc
–8.0 Vdc ≥ VI ≥ –20 Vdc

Reg

line

–
–

–
–

200
150

–
–

–
–

150
100

mV

Load Regulation

TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA

1.0 mA ≤ IO ≤ 40 mA

Reg

load

–
–

–
–

60
30

–
–

–
–

60
30

mV

Output Voltage

–7.0 Vdc ≥ VI ≥ –20 Vdc, 1.0 mA ≤ IO ≤ 40 mA
VI = –10 Vdc, 1.0 mA ≤ IO ≤ 70 mA

V

O

–4.5
–4.5

–
–

–5.5
–5.5

–4.75
–4.75

–
–

–5.25
–5.25

Vdc

Input Bias Current

(TJ = +25°C)
(TJ = +125°C)

I

IB

–
–

–
–

6.0

5.5

–
–

–
–

6.0

5.5

mA

Input Bias Current Change

–8.0 Vdc ≥ VI ≥ –20 Vdc

1.0 mA ≤ IO ≤ 40 mA

I

IB

–
–

–
–

1.5

0.2

–
–

–
–

1.5

0.1

mA

Output Noise Voltage

(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

V

n

– 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 (V

I

= –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) V

O

–11.1 –12 –12.9 –1 1.5 –12 –12.5 Vdc

Input Regulation

(TJ = +25°C)
–14.5 Vdc ≥ VI ≥ –27 Vdc
–16 Vdc ≥ VI ≥ –27 Vdc

Reg

line

–
–

–
–

250
200

–
–

–
–

250
200

mV

Load Regulation

TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA

1.0 mA ≤ IO ≤ 40 mA

Reg

load

–
–

–
–

100

50

–
–

–
–

100

50

mV

Output Voltage

–14.5 Vdc ≥ VI ≥ –27 Vdc, 1.0 mA ≤ IO ≤ 40 mA
VI = –19 Vdc, 1.0 mA ≤ IO ≤ 70 mA

V

O

–10.8
–10.8

–
–

–13.2
–13.2

–11.4
–11.4

–
–

–12.6
–12.6

Vdc

Input Bias Current

(TJ = +25°C)
(TJ = +125°C)

I

IB

–
–

–
–

6.5

6.0

–
–

–
–

6.5

6.0

mA

Input Bias Current Change

–16 Vdc ≥ VI ≥ –27 Vdc

1.0 mA ≤ IO ≤ 40 mA

I

IB

–
–

–
–

1.5

0.2

–
–

–
–

1.5

0.2

mA

Output Noise Voltage

(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

V

n

– 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

MC79L00, A Series

3

MOTOROLA ANALOG IC DEVICE DATA

ELECTRICAL CHARACTERISTICS (V

I

= –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) V

O

–13.8 –15 –16.2 –14.4 –15 –15.6 Vdc

Input Regulation

(TJ = +25°C)
–17.5 Vdc ≥ VI ≥ –30 Vdc
–20 Vdc ≥ VI ≥ –30 Vdc

Reg

line

–
–

–
–

300
250

–
–

–
–

300
250

mV

Load Regulation

TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA

1.0 mA ≤ IO ≤ 40 mA

Reg

load

–
–

–
–

150

75

–
–

–
–

150

75

mV

Output Voltage

–17.5 Vdc ≥ VI ≥ –Vdc, 1.0 mA ≤ IO ≤ 40 mA
VI = –23 Vdc, 1.0 mA ≤ IO ≤ 70 mA

V

O

–13.5
–13.5

–
–

–16.5
–16.5

–14.25
–14.25

–
–

–15.75
–15.75

Vdc

Input Bias Current

(TJ = +25°C)
(TJ = +125°C)

I

IB

–
–

–
–

6.5

6.0

–
–

–
–

6.5

6.0

mA

Input Bias Current Change

–20 Vdc ≥ VI ≥ –30 Vdc

1.0 mA ≤ IO ≤ 40 mA

∆I

IB

–
–

–
–

1.5

0.2

–
–

–
–

1.5

0.1

mA

Output Noise Voltage

(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

V

N

– 90 – – 90 – µV

Ripple Rejection

(–18.5 ≤ VI ≤ –28.5 Vdc, f = 120 Hz)

RR 33 39 – 34 39 – dB

Dropout Voltage

IO = 40 mA, TJ = +25°C

|VI–VO| – 1.7 – – 1.7 – Vdc

ELECTRICAL CHARACTERISTICS (V

I

= –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) V

O

–16.6 –18 –19.4 –17.3 –18 –18.7 Vdc

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

Reg

line

–
–
–
–

–
–
–
–

–
325
275

–

–
–
–
–

–
–
–
–

325

–
–

275

mV

Load Regulation

TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA

1.0 mA ≤ IO ≤ 40 mA

Reg

load

–
–

–
–

170

85

–
–

–
–

170

85

mV

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

V

O

–
–16.2
–16.2

–
–
–

–
–19.8
–19.8

–17.1

–

–17.1

–
–
–

–18.9

–

–18.9

Vdc

Input Bias Current

(TJ = +25°C)
(TJ = +125°C)

I

IB

–
–

–
–

6.5

6.0

–
–

–
–

6.5

6.0

mA

Input Bias Current Change

–21 Vdc ≥ VI ≥ –33 Vdc
–27 Vdc ≥ VI ≥ –33 Vdc

1.0 mA ≤ IO ≤ 40 mA

I

IB

–
–
–

–
–
–

–

1.5

0.2

–
–
–

–
–
–

1.5
–

0.1

mA

Output Noise Voltage

(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

V

n

– 150 – – 150 – µV

Ripple Rejection

(–23 ≤ VI ≤ –33 Vdc, f = 120 Hz, TJ = +25°C)

RR 32 46 – 33 48 – dB

Dropout Voltage

IO = 40 mA, TJ = +25°C

|VI–V

O|

– 1.7 – – 1.7 – Vdc

MC79L00, A Series

4

MOTOROLA ANALOG IC DEVICE DATA

ELECTRICAL CHARACTERISTICS

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

MC79L24C MC79L24AC

Characteristics Symbol Min Typ Max Min Typ Max Unit

Output Voltage (TJ = +25°C) V

O

–22.1 –24 –25.9 –23 –24 –25 Vdc

Input Regulation

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

Reg

line

–
–
–

–
–
–

–
350
300

–
–
–

–
–
–

350

–

300

mV

Load Regulation

TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA

1.0 mA ≤ IO ≤ 40 mA

Reg

load

–
–

–
–

200
100

–
–

–
–

200
100

mV

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

V

O

–
–21.4
–21.4

–
–
–

–
–26.4
–26.4

–22.8

–

–22.8

–
–
–

–25.2

–

–25.2

Vdc

Input Bias Current

(TJ = +25°C)
(TJ = +125°C)

I

IB

–
–

–
–

6.5

6.0

–
–

–
–

6.5

6.0

mA

Input Bias Current Change

–28 Vdc ≥ VI ≥ –38 Vdc

1.0 mA ≤ IO ≤ 40 mA

∆I

IB

–
–

–
–

1.5

0.2

–
–

–
–

1.5

0.1

mA

Output Noise Voltage

(TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

V

n

– 200 – – 200 – µV

Ripple Rejection

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

RR 30 43 – 31 47 – dB

Dropout Voltage

IO = 40 mA, TJ = +25°C

|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
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.

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

+V

in

+V

O

0.1

µ

F

–V

in

–V

O

0.33

µ

F

MC78LXX

MC79LXX

0.1µF

0.33

µ

F

Input Output

CO**

0.1

µ

F

CI*

0.33

µ

F

MC79LXX

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

** CO improves stability and transient response.

MC79L00, A Series

5

MOTOROLA ANALOG IC DEVICE DATA

TYPICAL CHARACTERISTICS

(TA = +25°C, unless otherwise noted.)

I

IB

, INPUT BIAS CURRENT (mA)

I

IB

, INPUT BIAS CURRENT (mA) V

O

, OUTPUT VOL TAGE (V)

Figure 3. Dropout Characteristics

Figure 4. Dropout Voltage versus

Junction Temperature

Figure 5. Input Bias Current versus

Ambient Temperature

Figure 6. Input Bias Current versus

Input Voltage

Figure 7. Maximum Average Power Dissipation

versus Ambient Temperature (TO–92)

8.0

6.0

4.0

2.0

0

0 –2.0 –4.0 –6.0 –0.8 –10

Vin, INPUT VOLTAGE (V)

MC79L05C
VO = –5.0 V
TJ = 25

°

C

IO = 1.0 mA IO = 100 mA

IO = 40 mA

–2.5

–2.0

–1.5

–1.0

–0.5

0

0 25 50 75 100 125

, INPUT/OUTPUT DIFFERENTIAL

VOLTAGE (V)

IO

TJ, JUNCTION TEMPERATURE (°C)

IO = 70 mA

–VV

4.0

4.2

3.8

3.6

3.4

3.2

3.0
0

0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (

°

C)

MC79L05C
Vin = –10 V
VO = –5.0 V
IO = 40 mA

5.0

4.0

3.0

2.0

1.0

0

0 –5.0 –10 –15 –20 –25 –30 –35 –40

Vin, INPUT VOLTAGE (V)

MC79L05C
VO = –5.0 V
IO = 40 mA

10,000

1,000

100

10

, POWER DISSIPATION (mW)

D

TA, AMBIENT TEMPERATURE (°C)

25 50 75 100 125 150

P

No Heatsink

R

Θ

JA

= 200°C/W

P

D(max)

to 25

°

C = 625 mW

Figure 8. SOP–8 Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

30

50

70

90

110

130

150

0.4

0.8

1.2

1.6

2.0

2.4

2.8

02030504010

L, LENGTH OF COPPER (mm)

170

3.2

P

D(max)

for TA = +50°C

R

θ

JA

P

D

, MAXIMUM POWER DISSIPATION (W)

2.0 oz.

Copper

Graph represents symmetrical layout

3.0 mmL

L

IO = 40 mA

IO = 1.0 mA

JUNCTION–TO–AIR ( C/W)

°

R

JA

, THERMAL RESISTANCE

θ

Dropout of Regulation is
defined when

∆

VO = 2% of V

O

MC79L00, A Series

6

MOTOROLA ANALOG IC DEVICE DATA

OUTLINE DIMENSIONS

P SUFFIX

PLASTIC PACKAGE

CASE 29–04

ISSUE AD

D SUFFIX

PLASTIC PACKAGE

CASE 751–05

(SOP–8)
ISSUE R

R

A

P

J

L

F

B

K

G

H

SECTION X–X

C

V

D

N

N

XX

SEATING
PLANE

1

NOTES:

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

2. CONTROLLING DIMENSION: INCH.

3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.

4. DIMENSION F APPLIES BETWEEN P AND L.
DIMENSION D AND J APPLY BETWEEN L AND K
MINIMUM. LEAD DIMENSION IS UNCONTROLLED
IN P AND BEYOND DIMENSION K MINIMUM.

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

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 0.022 0.41 0.55

F 0.016 0.019 0.41 0.48
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 –––

SEATING
PLANE

1

4

58

A0.25MCB

SS

0.25MB

M

h

q

C

X 45

_

L

DIM MIN MAX

MILLIMETERS

A 1.35 1.75

A1 0.10 0.25

B 0.35 0.49
C 0.18 0.25
D 4.80 5.00
E

1.27 BSCe

3.80 4.00

H 5.80 6.20
h

0 7

L 0.40 1.25

q

0.25 0.50

__

NOTES:

1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.

2. DIMENSIONS ARE IN MILLIMETERS.

3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.

5. DIMENSION B DOES NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.

D

E

H

A

B

e

B

A1

C

A

0.10

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
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and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola
was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.

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MC79L00/D

*MC79L00/D*

◊