UTC UTCLM7924, UTCLM7918, UTCLM7915, UTCLM7912, UTCLM7908 Datasheet
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UTC LM79XX LINEAR INTEGRATED CIRCUIT
3 TERMINAL 1A NEGATIVE
VOLTAGE REGULATOR
DESCRIPTION
The UTC LM79XX series of three-terminal negative
regulators are available in TO-220 package and with several
fixed output voltage, making them useful in a wide range of
application. Each type employs internal current limiting,
thermal shut-down and safe area protection, making it
essentially indestructible.
FEATURES
*Output current up to 1A
*-5V;-6V;-8V;-12V;-15V;-18V;-24V output voltage available
*Thermal overload protection
*Short circuit protection
BLOCK DIAGRAM
GND
1
TO-220
1:GND 2:Input 3:Output
R1
OUTPUT
R2
Voltage
reference
Protection
circuitry
RSC
INPUT
UTC UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R101-007,B
UTC LM79XX LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS(Ta=25°C)
PARAMETER SYMBOL VALUE UNIT
Input voltage Vi -35 V
JA
Thermal resistance
junction-air
Thermal resistance
junction-cases
Operating Temperature Topr 0 ~ +125
Storage Temperature Tstg -65 ~ +150
R θ
R θ
JC
65
5
UTC7905 ELECTRICAL CHARACTERISTICS
(Refer to test circuits, 0<Tj<125°C,Io=500mA,Vi=-10V,Ci=33uF,Co=1uF, unless otherwise specified)
Output voltage Vo 5.0mA<Io<1.0A,Po<15W
Line regulation
Load regulation
Quiescent current IQ
Quiescent current change
Vi=-7V to -25V 0.1 1.3 mA
Output voltage drift
Output noise voltage VN
Ripple rejection RR f=120Hz, Vi=-8V to -18V 54 60 dB
Dropout voltage Vo
Short circuit current Isc
peak current Ipk
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Tj=25°C
Vi=-7V to -20V
∆Vo Tj=25°C,Vi=-7V to -25V
Tj=25°C,Vi=-8V to -12V
∆Vo Tj=25°C,Io=5.0mA to 1.5A
Tj=25°C,Io=250mA to 750mA
Tj=25°C
Io=5mA to 1.0A 0.05 0.5 mA
Q
∆I
∆Vo/∆T
Io=5mA -0.4
f=10hz to 100kHz,Ta=25°C
Io=1.0A,Tj=25°C
Vi=-35V,Ta=25°C
Tj=25°C
-4.80 -5.0 -5.20 V
-4.75 -5.25 V
10 100 mV
mV
10 100 mV
3 50 mV
3 6 mA
100
2 V
300 mA
2.2 A
UTC7906 ELECTRICAL CHARACTERISTICS
(Refer to test circuits, 0<Tj<125°C,Io=500mA,Vi=-11V,Ci=2.2uF,Co=1uF,unless otherwise specified)
Output voltage Vo 5.0mA<Io<1.0A,Po<15W
Line regulation
Load regulation
Quiescent current IQ
Quiescent current change
Vi=-8V to -25V 1.3 mA
Output voltage drift
Output noise voltage VN
Ripple rejection RR f=120Hz, Vi=-9V to -19V 54 60 dB
Dropout voltage Vo
Short circuit current Isc
peak current Ipk
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Tj=25°C
Vi=-8V to -21V
∆Vo Tj=25°C,Vi=-8V to -25V
Tj=25°C,Vi=-9V to -13V
∆Vo Tj=25°C,Io=5.0mA to 1.5A
Tj=25°C,Io=250mA to 750mA
Tj=25°C
Io=5mA to 1.0A 0.5 mA
Q
∆I
∆Vo/∆T
Io=5mA -0.5
f=10hz to 100kHz,Ta=25°C
Io=1.0A,Tj=25°C
Vi=-35V,Ta=25°C
Tj=25°C
-5.76 -6.00 -6.24 V
-5.70 -6.30 V
10 120 mV
5 60 mV
10 120 mV
3 60 mV
3 6 mA
130
2 V
300 mA
2.2 A
°C /W
°C /W
°C
°C
mV/°C
µV
mV/°C
µV
UTC UNISONIC TECHNOLOGIES CO., LTD. 2
QW-R101-007,B
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