Datasheet > 78L18

78L18

更新时间： 2024-09-23 22:37:11

品牌	Logo	应用领域
永盛 - Wing Shing		稳压器
页数	文件大小	规格书
2页	217K
描述
Positive-Voltage Regulators

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数据手册

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78L18 数据手册

Positive-Voltage Regulators

78L18

3-Terminal Regulators

Output Current up to 100 mA

No External Components

Internal Thermal-Overload Protection

Internal Short-Circuit Current Limiting

TO-92

78L18ACZ

Direct Replacements for Fairchild µA78L

Series

INPUT

COMMON

OUTPUT

description

This series of fixed-voltage integrated-circuit

voltage regulators is designed for a wide range of

applications. These applications include on-card

regulation for elimination of noise and distribution

problems associated with single-point regulation.

In addition, they can be used with power-pass

elementstomakehigh-currentvoltageregulators.

One of these regulators can deliver up to 100 mA

of output current. The internal limiting and

thermal-shutdown features of these regulators

makethemessentiallyimmunetooverload. When

used as a replacement for a zener diode-resistor

combination, an effective improvement in output

impedance can be obtained, together with lower

bias current.

OUTPUT

GND

INPUT

SOT-89

78L18CPK

electrical characteristics at specified virtual junction temperature, V =

26V, I 40mA (unless

otherwise noted)

78L18

‡

TEST CONDITIONS

UNIT

PARAMETER

MIN

TYP

MAX

18.7

17.3

25°C

18.9

360

300

Output voltage

17.1

I =1mA to 40MA, V = 20.5 to 33V

Full range

= 1 mA to 70 mA

V =

20.5V to 33V

22V to 33V

Input

voltage regulation

25 C

V =

Ripple rejection

V =

f = 120 Hz

25°C

21.5V to 31.5V,

= 1 mA to 100 mA

= 1 mA to 40 mA

180

Output

voltage regulation

25 C

Output

noise voltage

f = 10 Hz to 100 kHz

25°C

µV

Dropout voltage

25°C

1.7

4.7

6.5

Bias current

125°C

V =

1.5

22V to 33V

Bias

current change

Full range

= 1 mA to 40 mA

0.1

‡

Pulse-testing techniques maintain T as close to T 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 78L05 is T = 0°C to 70°C

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

Homepage: http://www.wingshing.com

Tel:(852)2341 9276 Fax:(852)2797 8153

E-mail: wsccltd@hkstar.com

2-1

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