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79L18

更新时间： 2024-11-20 22:22:27
品牌 Logo 应用领域
永盛 - Wing Shing 稳压器
页数 文件大小 规格书
3页 169K
描述
Negative-Voltage Regulators

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79L18 数据手册

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79L18  
Negative-Voltage Regulators  
3-Terminal Regulators  
Output Current Up to 100 mA  
OUTPUT  
INPUT  
COMMON  
No External Components Required  
Internal Thermal-Overload Protection  
Internal Short-Circuit Current Limiting  
C
I
O
Direct Replacement for Motorola MC79L18  
Series  
TO–92  
79L18ACZ  
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,  
SOT-89  
COMMON  
INPUT OUTPUT  
79L18CPK  
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.  
fective improvement in output impedance of two orders of magnitude, with lower bias  
electrical characteristics at specified virtual junction temperature, V =  
I
-26V, IO =40mA  
otherwise noted)  
79L18  
‡
TEST CONDITIONS  
UNIT  
T
PARAMETER  
MIN  
-17.3  
-17.1  
TYP  
MAX  
25°C  
-18  
-18.7  
-18.9  
-18.9  
Output voltage  
V
Full range  
Full range  
I =1mA to 40mA,V =-20.5 to -33V  
o
I
I
= 1 mA to 70 mA  
-17.1  
O
V =  
-20.5 to -33V  
-21V to -33V  
325  
275  
Input  
voltage regulation  
I
70  
60  
°
mV  
25 C  
V =  
I
Ripple rejection  
V =  
I
f = 120 Hz  
25°C  
dB  
-23V to -33V  
48  
27  
19  
33  
170  
85  
I
= 1 mA to 100 mA  
= 1 mA to 40 mA  
Output  
voltage regulation  
O
O
°
25 C  
mV  
I
Output  
noise voltage  
f = 10 Hz to 100 kHz  
25°C  
µV  
150  
Dropout voltage  
25°C  
25°C  
V
1.7  
6.5  
Bias current  
125°C  
6
1.5  
mA  
mA  
V =  
-21V to -33V  
Bias  
current change  
I
range  
Full  
I
O
= 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  
J
A
measured with a 0.33-µF capacitor across the input and a 0.1-µF capacitor across the output. Full range for the 7  
9L18 is T  
= 0°C to 70°C  
J
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  
3-1  
123

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