79LXX LINEAR INTEGRATED CIRCUIT
1
3-TERMINAL 0.1A NEGATIVE
VOLTAGE REGULATOR
DESCRIPTION
The Contek79LXX family is monolithic fixed voltage
regulator integrated circuit. They are suitable for
applications that required supply current up to 100mA.
FEATURES
*Output current up to 100mA
*Fixed output voltage of -5V, -6V, -8V, -9V,
-12V,-15V ,-18V and -24V available
*Thermal overload shutdown protection
*Short circuit current limiting
TO-92
1
SOP-8
SOT-89
1
TO-92, SOT-89: 1:GND 2:Input 3:Output
SOP- 8 : 1. Vout ; 2,3,6,7 Vin ; 5. GND;
4,8 NC
TEST CIRCUIT
GND
OUTPUT
INPUT
Contek
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
79LXX LINEAR INTEGRATED CIRCUIT
2
ABSOLUTE MAXIMUM RATINGS ( Operating temperature range applies unless otherwise specified )
PARAMETER SYMBOL VALUE UNIT
Input voltage(for Vo=-5~-9V)
(for Vo=-12~-15V)
(for Vo=-18~-24V)
VI
VI
VI
-30
-35
V
V
Power Dissipation PD500 mW
Operating Junction Temperature Range TOPR -30 ~ +125 C
Storage Temperature Range TSTG -40 ~ +125 C
Contek79L05 ELECTRICAL CHARACTERISTICS
(Tj=25 C,C1=0.33mF,Co=1.0 mF, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Vo VIN=-10V,Io=40mA -4.8 -5.0 -5.2 V
Line Regulation Vo-VIN VIN=-7~-20V,Io=40mA 15 150 mV
Load Regulation Vo-Io VIN=-10V,Io=1~100mA 7 60 mV
Quiescent current IQVIN=-10V,Io=40mA 3.5 6.0 mA
Ripple Rejection RR VIN=-8~-18V, Io=40mA,
ein=1Vp-p ,f=120Hz
41 71 dB
Output Noise Voltage VNO VIN=-10V,
BW=10Hz~100kH,Io=40mA
120 mV
Contek79L06 ELECTRICAL CHARACTERISTICS
(Tj=25 C,C1=0.33mF,Co=1.0 mF, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Vo VIN=-12V,Io=40mA -5.76 -6.0 -5.2 V
Line Regulation Vo-VIN VIN=-8.5~-20V,Io=40mA 15 150 mV
Load Regulation Vo-Io VIN=-12V,Io=1~100mA 7 60 mV
Quiescent current IQVIN=-12V,Io=40mA 3.5 6.0 mA
Ripple Rejection RR VIN=-9~ -19V,
Io=40mA,ein=1Vp-p ,f=120Hz
41 71 dB
Output Noise Voltage VNO VIN=-12V,
BW=10Hz~100kH,Io=40mA
120 mV
Contek79L08 ELECTRICAL CHARACTERISTICS
(Tj=25 C,C1=0.33mF,Co=1.0 mF, unless otherwise specified)
PARAMETER SYMBOL Test conditions MIN TYP MAX UNIT
Output Voltage Vo VIN=-14V,Io=40mA -7.68 -8.0 -8.32 V
Line Regulation Vo-VIN VIN=-10.5~-23V,Io=40mA 24 175 mV
Load Regulation Vo-Io VIN=-14V,Io=1~100mA 10 80 mV
Quiescent current IQVIN=-14V,Io=40mA 3.5 6.0 mA
Ripple Rejection RR VIN=-11~ -21V,
Io=40mA,ein=1Vp-p ,f=140Hz
39 68 dB
Output Noise Voltage VNO VIN=-14V,
BW=10Hz~100kH,Io=40mA
190 mV
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
79LXX LINEAR INTEGRATED CIRCUIT
3
Contek79L09 ELECTRICAL CHARACTERISTICS
(Tj=25 C,C1=0.33mF,Co=1.0 mF,unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Vo VIN=-15V,Io=40mA -8.64 -9.0 -9.36 V
Line Regulation Vo-VIN VIN=-12.5~-24V,Io=40mA 27 200 mV
Load Regulation Vo-Io VIN=-15V,Io=1~100mA 12 90 mV
Quiescent current IQVIN=-15V,Io=40mA 3.5 6.0 mA
Ripple Rejection RR VIN=-12~ -22V,
Io=40mA,ein=1Vp-p ,f=150Hz
37 64 dB
Output Noise Voltage VNO VIN=-15V,
BW=10Hz~100kH,Io=40mA
210 mV
Contek79L12 ELECTRICAL CHARACTERISTICS
(Tj=25 C,C1=0.33mF,Co=1.0 mF, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Vo VIN=-19V,Io=40mA -11.5 -12.0 -12.5 V
Line Regulation Vo-VIN VIN=-14.5~-27V,Io=40mA 36 250 mV
Load Regulation Vo-Io VIN=-19V,Io=1~100mA 16 100 mV
Quiescent current IQVIN=-19V,Io=40mA 3.5 6.0 mA
Ripple Rejection RR VIN=-15~ -25V,
Io=40mA,ein=1Vp-p ,f=190Hz
37 64 dB
Output Noise Voltage VNO VIN=-19V,
BW=10Hz~100kH,Io=40mA
210 mV
Contek79L15 ELECTRICAL CHARACTERISTICS
(Tj=25 C,C1=0.33mF,Co=1.0 mF, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Vo VIN=-23V,Io=40mA -14.4 -15.0 -15.6 V
Line Regulation Vo-VIN VIN=-17.5~-30V,Io=40mA 45 300 mV
Load Regulation Vo-Io VIN=-23V,Io=1~100mA 20 150 mV
Quiescent current IQVIN=-23V,Io=40mA 3.5 6.0 mA
Ripple Rejection RR VIN=-18.5~ -28.5V,
Io=40mA,ein=1Vp-p ,f=230Hz
34 63 dB
Output Noise Voltage VNO VIN=-23V,
BW=10Hz~100kH,Io=40mA
340 mV
Contek79L18 ELECTRICAL CHARACTERISTICS
(Tj=25 C,C1=0.33mF,Co=1.0 mF, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Vo VIN=-27V,Io=40mA -17.3 -18.0 -18.7 V
Line Regulation Vo-VIN VIN=-20.5~-33V,Io=40mA 54 300 mV
Load Regulation Vo-Io VIN=-27V,Io=1~100mA 23 170 mV
Quiescent current IQVIN=-27V,Io=40mA 3.5 6.0 mA
Ripple Rejection RR VIN=-23~ -33V,
Io=40mA,ein=1Vp-p ,f=270Hz
33 60 dB
Output Noise Voltage VNO VIN=-27V,
BW=10Hz~100kH,Io=40mA
410 mV
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
79LXX LINEAR INTEGRATED CIRCUIT
4
Contek79L24 ELECTRICAL CHARACTERISTICS
(Tj=25 C,C1=0.33mF,Co=1.0 mF, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Vo VIN=-33V,Io=40mA -23.0 -24.0 -25.0 V
Line Regulation Vo-VIN VIN=-27~-38V,Io=40mA 72 350 mV
Load Regulation Vo-Io VIN=-33V,Io=1~100mA 30 200 mV
Quiescent current IQVIN=-33V,Io=40mA 3.5 6.0 mA
Ripple Rejection RR VIN=-29~ -35V,
Io=40mA,ein=1Vp-p ,f=330Hz
31 55 dB
Output Noise Voltage VNO VIN=-33V,
BW=10Hz~100kH,Io=40mA
550 mV
APPLICATION CIRCUIT
Contek
79LXX 3
1
2
C0
1.0 mF
C1
0.33 mF
Vi Vo
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
79LXX LINEAR INTEGRATED CIRCUIT
5
TYPICAL PERFORMANCE CHARACTERISTICS
Fig.1 Power dissipation vs.
ambient temperature
25 50 75 100 125
Ambient temperature( C)
100
200
300
400
500
Power Dissiapation(mW)
TO-92
SOT-89
Fig.2 Input Voltage vs.
Output Voltage
0 -10 -20 -30 -40
Input Voltage(V)
Output Voltage(V)
0
-10
-20
-30
-40
Contek79L24
Contek79L15
Contek79L09
Contek79L05
Fig.3 Load Characteristics
(Tj=25 C)
0 50 100 150 200 250
Output Current(mA)
Output Voltage(V)
0
-10
-20
-30
-40
Contek79L24
Contek79L15
Contek79L05
VIN=-33V
VIN=-23V
VIN=-10V
Fig.4 Short Circuit Current
(Tj=25 C)
0 -10 -20 -30 -40
Dropout Voltage(V)
Output Current(mA)
100
200
300
Fig.5 Output Voltage vs.
Junction temperature
Ambient temperature( C)
-25 12525 75 175
Output Voltage(V)
0
-10
-20
-30
-40
VIN=-33V
VIN=-23V
VIN=-10V
Contek79L24
Contek79L15
Contek79L05
Ambient temperature( C)
Fig.6 Output Voltage vs.
ambient temperature
-50 0 50 100 150
Output Voltage(V)
-4.8
-4.9
-5.0
-5.1
5.2
-7.8
-7.9
-8.0
-8.1
8.2
Contek79L08
Contek79L05
Fig.7 Contek79L05 Dropout
Characteristics (Tj=25 C)
Fig.8 Contek79L08 Dropout
Characteristics (Tj=25 C)
Input Voltage(V)Input Voltage(V)
-5.5 -6.0 -6.5
Output Voltage(V)
-4.5
-5.0
Io=100mA
Io=40mA
Io=5mA
-8.5 -9.0 -9.5
-7.5
-8.0
Io=100mA
Io=40mA
Io=5mA
Output Voltage(V)
Fig.9 Current vs. Input
Voltage(Io=0mA,Tj=25 C)
Quiescent current(mA)
0
1
2
3
4
5
Contek79L24
Contek79L05
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
