TGS LM7912J 3-terminal 1a positive voltage regulator Datasheet

TIGER ELECTRONIC CO.,LTD
Product specification
LM7912J
3-Terminal 1A Positive Voltage Regulator
GENERAL DESCRIPTION
The LM7912 series of three terminal positive regulators are available in the TO-220 package and with
several fixed output voltages, making them useful in a wide range of applications. Each type employs
internal current limiting, thermal shut down and safe operating area protection, making it essentially
indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although
designed primarily as fixed voltage regulators, these devices can be used with external components to
obtain adjustable voltages and currents.
ABSOLUTE MAXIMUM RATINGS ( Ta = 25 C)
O
Parameter
Symbol
Typ
Unit
Input Voltage
VI
-35
V
Output Voltage
VO
-12
V
Peak Current
IPK
-2.2
A
Operating Temperature
Range
TOPR
0~125
o
Storage Temperature Range
TSTG
-65~150
o
C
C
TO-252
ELECTRICAL CHARACTERISTICS ( Ta = 25 C)
O
(Refer to test circuit, Io = -500mA, Vi = -18V, Ci= 2.2uF, Co=1.0uF unless otherwise specified)
Parameter
Output Voltage
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Symbol
VO
Regline
Regload
IQ
ΔIQ
Test Conditions
Min
Typ
Max
Unit
VI = -14.5V to -30V
-11.64
-12
-12.36
V
VI = -14.5V to -30V
—
-12
-240
VI = -16V to -22V
—
-6.0
-120
IO = -5.0mA to-1.5A
—
-12
-240
IO =-250mA to -750mA
—
-4
-120
TJ =+25 oC
—
-3
-6
IO = -5mA to -1A
—
—
-0.5
VI = -15V to -30V
—
—
-1.0
mV
mV
mA
mA
Ripple Rejection
RR
f = 120Hz, VO = -15V to -25V
54
60
—
dB
Dropout Voltage
VDrop
IO = -1A, TJ =+25 oC
—
-2
—
V
Short Circuit Current
ISC
VI = -35V, TA =+25 oC
—
-300
—
mA
Peak Current
IPK
TJ =+25 oC
—
-2.2
—
A
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