of 2004

description

This series of fixed negative-voltage integrated-circuit

voltage regulators is designed for a wide range of

applications. These include on-card regulation for

elimination of

noise

and

distribution

problems

associatedwith single-point regulation. In addition,

they can be used to control series pass elements to make high-current voltage-regulator circuits. One of these

regulators can deliver up to 100 mA of output current. The internal current-limiting and thermal-shutdown features

make them essentially immune to overload. When used as a replacement for a zener-diode and resistor combination,

these devices can provide ef

current.

TO–92

otherwise noted)

PARAMETER

TEST CONDITIONS

TJ‡

UNIT

J

MIN

TYP

MAX

V

7Vto20V

I

1 mA to 40 mA

25

°C

Output voltage

V

7 V t 20 V

I

1

A t 40

A

Full range

V

Input

VI =

25

°C

mV

voltage regulation

VI =

25

°C

mV

Ripple rejection

VI =

f = 120 Hz

25

°C

dB

Output

IO = 1 mA to

25

°C

mV

voltage regulation

IO = 1 mA to

25

°C

mV

Output

noise voltage

f = 10 Hz to 100 kHz

25

°C

µV

Dropout voltage

25

°C

1.7

V

Bias current

25

°C

6

mA

Bias c rrent

125

°C

5.5

mA

Bias

VI =

Full range

1.5

mA

current change

IO = 1 mA to 40 mA

F ll range

0.1

mA

‡ Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are

measured with a 0.33-

µF capacitor across the input and a 0.1-µF capacitor across the output. Full range for the 7

J = 0°C to 70°C

Wing Shing Computer Components Co., (H.K.)Ltd.

Tel:(852)2341 9276

Fax:(852)2797 8153

E-mail:

ic@wingshing.com

79L08

Negative-Voltage Regulators

OUTPUT

INPUT

COMMON

9L08 is T

-7.7

-8

-8.3

-7.6

-8.4

42

30

15

mV

mA

mA

mV

25 C

25 C

Full

Bias current

I =1 to 40mA, V = -10.5V to -

-10.5V to -23V

-11V to -23V

-11V to -23V

-11V to -23V

SOT-89

o

-23V

fective improvement in output iimpedance of two orders of magnitude, with lower bias

40mA

100mA

36

3

200

150

o

79L08ACZ

79L08CPK

79L06

3-1

-14V, I = 40mA (unless

C

O

I

Io=1mA to 70mA

37

46

100

50

54