TIGER ELECTRONIC CO.,LTD
Product specification
3-Terminal Positive Voltage Regulator
GENERAL DESCRIPTION
LM7909
The LM7909 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.
O
ABSOLUTE MAXIMUM RATINGS ( Ta = 25 C)
Parameter
Input Voltage
Output Voltage
Peak Current
Operating Temperature
Range
Storage Temperature Range
Symbol
V
I
V
O
I
PK
T
OPR
T
STG
Typ
-35
-9.0
-2.2
0~125
-65~150
Unit
V
V
A
o
C
o
TO-220
C
ELECTRICAL CHARACTERISTICS ( Ta = 25 C)
(Refer to test circuit, Io = -500mA, Vi = -15V, Ci= 2.2uF, Co=1.0uF unless otherwise specified)
Parameter
Output Voltage
Line Regulation (Note1)
Symbol
V
O
Regline
V
I
= -13V to -18V
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Current
Regload
I
Q
ΔI
Q
V
I
= -12V to -25V
RR
V
Drop
I
SC
I
PK
f = 120Hz,
△V
i
= 10V
I
O
= -1A, T
J
=+25
o
C
V
I
= -35V, T
A
=+25
o
C
T
J
=+25
o
C
—
54
—
—
—
—
60
-2
-300
-2.2
-1.0
—
—
—
—
dB
V
mA
A
I
O
= -5.0mA to-1.5A
I
O
=-250mA to -750mA
T
J
=+25
o
C
I
O
= -5mA to -1A
—
—
—
—
—
-5
-12
-4
-3
—
-90
-180
-90
-6
-0.5
mA
mA
mV
Test Conditions
V
I
= -12V to -23V,P
O
≤15W
V
I
= -12V to -25V
Min
-8.6
—
Typ
-9.0
-10
Max
-9.4
-180
mV
Unit
V
O
TGS [ Tiger Electronic Co.,Ltd ]
