Datasheet LM79L05A Datasheet (Fairchild Semiconductor)

www.fairchildsemi.com

MC79LXXA/LM79LXXA

3-Terminal 0.1A Negative V oltage R egulator

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

Internal Block Diagram

Description

These regulators employ internal current limiting and
thermal shutdown, making them essentially indestructible.

TO-92

1

1.GND 2.Input 3.Output

8-SOP

1

1. Output 2.3.6.7. Input 5. GND 4.8. NC

SOT-89

1

D3

D2

R23+R21

Q16

R28

R24 R25

©2002 Fairchild Semiconductor Corporation

R22

Q15

Q13Q14

R18

Q10

Q11

Q5

R29

Q17

R7

Q6

Q9

C1

R16

Q12

R26

R17

Q8

Q7

Q1

Q4

R27

R1
R2

R6

R3

D1

R4

R15

Q2

R

Q3

GND

Output

R5

Input

Rev. 1.0.2

MC79LXXA/LM79LXXA

Absolute Maximum Ratings

Parameter Symbol Value Unit

Input Voltage (for V
(for V
(for V

= -12V to -18V)

O

= -24V)

O

= -5V to -8V)

o

Operating Temperature Range T
Storage Temperature Range T

V

I

OPR
STG

-30

-35

V

-40

0 ~ +125 °C

-65 ~ +150 °C

Electrical Characteristics(MC79L05A/LM79L05A)

(VI = -10V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V

Line Regulation (Note1) ∆V

TJ = +25°C -4.8 -5.0 -5.2 V

O

TJ =+25°C

O

≤ +125°C, unless otherwise specified)

J

-7.0V ≥ V

≥ -20V - 15 150 mV

I

-8V ≥ VI ≥ -20V - - 100 mV

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

TJ =+25°C

O

O

-7.0V≥ V
V

= -10V, 1.0mA ≤ I

I

≥ -20V, 1.0mA ≤ IO ≤ 40mA -4.75 - -5.25 V

I

TJ =+25°C-2.05.5

Q

Q
Q

N

= +125°C--6.0

T

J

-8V ≥ V

1.0mA ≤ I

≥ -20V - - 1.5 mA

I

O

TA = +25°C,10Hz ≤ f ≤ 100kHz - 30 - µV
f = 120Hz, -8V ≥ V

T

= +25°C

J

TJ = +25°C-1.7-V

D

1.0mA ≤ I

1.0mA ≤ I

≤ 70mA -4.75 - -5.25 V

O

≤ 40mA - - 0.1 mA

≥ -18V

I

≤ 100mA - 20 60 mV

O

≤ 40mA - 10 30 mV

O

mA

41 60 - dB

due to heating effects must be taken

O

2

MC79LXXA/LM79LXXA

Electrical Characteristics (MC79L08A)

(VI = -14V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V

Line Regulation(Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line
With Load 1.0mA ≤ I

∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

TJ = +25°C -7.7 -8.0 -8.3 V

O

≥ -23V - - 175 mV

I

≤ 100mA - - 80 mV

o

≤ 40mA - - 40 mV

o

O

O

O

TJ = +25°C

TJ = +25°C

-10.3V ≥ V
V

= -14V, 1.0mA ≤ I

I

≥ -23V, 1.0mA ≤ Io ≤ 40mA -7.6 - -8.4

I

-10.3V ≥ V

-12V ≥ VI ≥ -23V - - 125 mV

1.0mA ≤ I

1.0mA ≤ I

≤ 70mA -7.6 - -8.4

o

Tj = +25°C--6.0

q

T

= +125°C--5.5

j

-11.7V ≥ V

Q

Tj = +25°C,10Hz ≤ f ≤ 100kHz - 50 - µV

N

f = 120Hz, -11V ≥ V
T

= +25°C

j

Tj = +25°C-1.7-V

D

≥ -23V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

o

≥ -21V

I

39 55 - dB

V

mA

Note:

1. Load an d lin e re gul ation ar e sp ecifi ed at con sta nt ju nct ion t empe rat ure . Chan ge i n V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

3

MC79LXXA/LM79LXXA

Electrical Characteristics(MC79L12A)

(VI = -19V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

TJ = +25°C -11.5 -12.0 -12.5 V

O

≥ -27V - - 250 mV

I

≤ 100mA - - 100 mV

O

≤ 40mA - - 50 mV

O

O

O

O

TJ = +25°C

TJ = +25°C

-14.5V > V
V

= -19V, 1.0mA ≤ I

I

> -27V, 1.0mA ≤ IO ≤ 40mA -11.4 - -12.6 V

I

-14.5V ≥ V

-16V ≥ VI ≥ -27V - - 200 mV

1.0mA ≤ I

1.0mA ≤ I

≤ 70mA -11.4 - -12.6 V

O

TJ = +25°C--6.0

Q

T

= +125°C--6.5

J

-16V ≥ V

Q

1.0mA ≤ I

Q

TA = +25°C,10Hz ≤ f ≤ 100kHz - 80 - µV

N

f = 120Hz, -15V≥ V
T

= +25°C

J

TJ = +25°C-1.7-V

D

≥ -27V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

≥ -25V

I

37 42 - dB

mA

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

4

MC79LXXA/LM79LXXA

Electrical Characteristics(MC79L15A)

(VI = -23V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

TJ = +25°C -14.4 -15.0 -15.6 V

O

≥ -30V - - 300 mV

I

≤ 100mA - - 150 mV

O

≤ 40mA - - 75 mV

O

≤ 70mA -14.25 - -15.75 V

O

O

O

TJ = +25°C

TJ = +25°C

-17.5V ≥ V
V

= -23V, 1.0mA ≤ I

I

≥ -30V, 1.0mA ≤ IO ≤ 40mA -14.25 - -15.75 V

I

-17.5V ≥ V

-20V ≥ VI ≥ -30V - - 250 mV

1.0mA ≤ I

1.0mA ≤ I

O

TJ = +25°C--6.0

Q

T

= +125°C--6.5

J

-20V ≥ V

Q

1.0mA ≤ I

Q

TA = +25°C,10Hz ≤ f ≤ 100kHz - 90 - µV

N

f = 120Hz, -18.5V ≥ V
T

= +25°C

J

TJ = +25°C-1.7-V

D

≥ -30V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

≥ -28.5V

I

34 39 - dB

mA

Note:

1. Load an d lin e re gul ation ar e sp ecifi ed at con sta nt ju nct ion t empe rat ure . Chan ge i n V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

5

MC79LXXA/LM79LXXA

Electrical Characteristics(MC79L18A)

(VI = -27V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

TJ = +25°C -17.3 -18.0 -18.7 V

O

≥ -33V - - 325 mV

I

≤ 100mA - - 170 mV

O

≤ 40mA - - 85 mV

O

≤ 70mA -17.1 - -18.9 V

O

O

O

TJ = +25°C

TJ = +25°C

-20.7V > V
V

= -27V, 1.0mA ≤ I

I

> -33V, 1.0mA ≤ IO ≤ 40mA -17.1 - -18.9 V

I

-20.7V ≥ V

-21V ≥ VI ≥ -33V - - 275 mV

1.0mA ≤ I

1.0mA ≤ I

O

TJ = +25°C--6.5

Q

T

= +125°C--6.0

J

-21V ≥ V

Q

1.0mA ≤ I

Q

TA =+25°C,10Hz ≤ f ≤ 100kHz - 150 - µV

N

f = 120Hz, -23V ≥ V
T

= +25°C

J

TJ = +25°C-1.7-V

D

≥ -33V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

≥ -33V

I

33 48 - dB

mA

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

6

MC79LXXA/LM79LXXA

Electrical Characteristics(MC79L24A)

(VI = -33V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

TJ = +25°C -23 -24 -25 V

O

≥ -38V - - 350 mV

I

≤ 100mA - - 200 mV

O

≤ 40mA - - 100 mV

O

≤ 70mA -22.8 - -25.2 V

O

O

O

O

TJ = +25°C

TJ = +25°C

-27V ≥ V
V

= -33V, 1.0mA ≤ I

I

≥ -38V, 1.0mA ≤ IO ≤ 40mA -22.8 - -25.2 V

I

-27V ≥ V

-28V ≥ VI ≥ -38V - - 300 mV

1.0mA ≤ I

1.0mA ≤ I

TJ = +25°C--6.5

Q

T

= +125°C--6.0

J

-28V ≥ V

Q

1.0mA ≤ I

Q

TA = +25°C,10Hz ≤ f ≤ 100kHz - 200 - µV

N

f = 120Hz, -29V ≥ V
T

= +25°C

J

TJ = +25°C-1.7-V

D

≥ -38V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

≥ -35V

I

31 47 - dB

mA

Note:

1. Load an d lin e re gul ation ar e sp ecifi ed at con sta nt ju nct ion t empe rat ure . Chan ge i n V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

7

MC79LXXA/LM79LXXA

Typical Application

Design Considerations

The MC79LXXA/LM79LXXA Series of fixed voltage regulators are designed with Thermal Overlo ad Protection that shuts
down the circuit when subjected to an excessive power overload condition. Internal Short Circuit Prote ction 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 supp ly filter
with long wire lengths, 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 0.33µF or larger tantalum, my lar, 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.

LM78LXXA
MC78LXXA

LM79LXXA
MC79LXXA

Figure 1. Positive And Nega tive Regulato r

A common ground is required between the Input and the output voltages. The input voltage must remain typically 2.0V above
the output voltage even during the low point on the input ripple voltage.

I

Figure 2. Typical Appli cation

MC79LXXA
LM79LXXA

* C1 is required if regulator is located an appreciable distance from power supply filter.
* C

improves stability and transient response.

O

8

Mechanical Dimensions

Package

MC79LXXA/LM79LXXA

Dimensions in millimeters

0.46

±0.10

4.58

+0.25
–0.15

TO-92

±0.20

4.58

±0.40

14.47

1.27TYP

[1.27

±0.20

3.86MAX

±0.10

1.02

+0.10

–0.05

0.38

1.27TYP

]

3.60

±0.20

[1.27

±0.20

]

0.38

+0.10
–0.05

(0.25)

(R2.29)

9

MC79LXXA/LM79LXXA

Mechanical Dimensions

Package

#1

#4

6.00 ±0.30

0.006

0.15

0.236 ±0.012

(Continued)

8-SOP

1.55 ±0.20

0.061 ±0.008

#8

#5

MAX

5.13

0.202

1.80

0.071

Dimensions in millimeters

0.1~0.25

MIN

0.004~0.001

0.56

4.92 ±0.20

0.194 ±0.008

MAX

1.27

0.022

()

0.41 ±0.10

0.016 ±0.004

0.050

+

-0.002

-0.05

0.004

0.50 ±0.20

0.020 ±0.008

+

0.10

3.95 ±0.20

0.156 ±0.008

5.72

0.225

0~8°

MAX0.10

MAX0.004

10

MC79LXXA/LM79LXXA

Mechanical Dimensions

Package

4.50

±0.20

1.65

±0.10

(Continued)

SOT-89

C0.2

(0.50)

±0.20

2.50

(1.10)

±0.20

4.10

Dimensions in millimeters

1.50

±0.20

(0.40)

0.50

±0.10

1.50 TYP 1.50 TYP

0.40

±0.10

0.40

+0.10
–0.05

11

MC79LXXA/LM79LXXA

Ordering Information

Product Number Package Operating Temperature

LM79L05ACZ TO-92 0 ~ +125°C

Product Number Package Operating Temperature

MC79L05ACP
MC79L08ACP
MC79L12ACP
MC79L15ACP
MC79L18ACP
MC79L24ACP
MC79L05ACD
MC79L15ACD
MC79L05ACH SOT-89

TO-92

0 ~ +125°C

8-SOP

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.

LIFE SUPPORT POL I CY

FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein :

1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.

www.fairchildsemi.com

2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .

12/11/02 0.0m 001

 2002 Fairchild Semiconductor Corporation

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