Fairchild Semiconductor LM79L05A Datasheet

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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