78L12
D
D
D
D
D
D
3-Terminal Regulators
Output Current up to 100 mA
No External Components
Internal Thermal-Overload Protection
Internal Short-Circuit Current Limiting
Direct Replacements for Fairchild
µA78L
12
Series
Positive-Voltage Regulators
O
C
I
TO-92
78L12ACZ
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
elements to make high-current voltage regulators.
One of these regulators can deliver up to 100 mA
of output current. The internal limiting and
thermal-shutdown features of these regulators
make them essentially immune to overload. 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.
INPUT
COMMON
OUTPUT
OUTPUT GND
INPUT
SOT-89
78L12CPK
electrical characteristics at specified virtual junction temperature, V
I
=
19V, I
o
=40mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
‡
MIN
25°C
Output voltage
V 207V t 20 V
V to
I
I
O
=1mA to 40MA, V
I
=14V to 27V
IO = 1 mA to 70 mA
VI =
14.5V tO 27V
VI =
16V tO 27V
VI =
15V to 25V,
f = 120 Hz
IO = 1 mA to 100 mA
IO = 1 mA to 40 mA
f = 10 Hz to 100 kHz
Full range
Full range
25°C
25 C
25°C
25°C
25 C
25°C
25°C
25°C
125°C
VI =
16V to 27V
IO = 1 mA to 40 mA
37
78L12
TYP
MAX
12.5
12.6
UNIT
11.5
11.4
12
12
12
V
11.4
12.6
250
200
Input
voltage regulation
Ripple rejection
Output
voltage regulation
Output
noise voltage
Dropout voltage
55
49
42
22
13
70
1.7
4.3
mV
mV
dB
100
50
mV
mV
µV
V
Bias
current
current
Bias c rrent
Bias
current change
6
5.5
1.5
0.1
mA
mA
mA
mA
Full
range
F ll
Full
‡ 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 78L05 is T J = 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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