7090

NTE7090
Variable Output Voltage Regulator
(Dual Tracking Type)
Description:
The NTE7090 is a dual tracking, variable output voltage regulator housed in a 8–pin SIP.
The output voltage can be adjusted over a wide range from ±3 to ±30V by adjusting the value of the
voltage setting external resistors. By adjusting the resistance of the external balance setting resistors
the positive/negative output voltage ratio can also be set freely. Again by attaching power transistors
high current gains can be achieved making the device suitable for use in the power supplies of a wide
variety of equipment.
Features:
D High Input voltage . . . . . . . . . . . . . . . . . . . . . . VI = ±35V
D Wide Range of Output Voltage . . . . VO = ±3 to ±30V
D Low output noise voltage . . . . . . VNO = 12µVrms(typ)
D Built–in current limiting and thermal shutdown circuit
D The output voltage rise time constant of the coefficients can be adjusted by the value of the
external capacitor.
D Capability of operation control by the external control signal (Pin 8).
Application:
Dual voltage power supplies for stereo preamplifiers, for the power supplies of other equipment, including operational amplifiers.
Recommended Operating Conditions:
Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±8 to ±35V
Rated Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20V
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35V
Load Current, IL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±30mA
Input–Output Voltage Difference, VI–VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±32V
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mW
Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –56° to +125°C
Electrical Characteristics: (TA = +25°C, VI = ±20V, VO = ±15V, IL = 10mA unless otherwise specified)
Parameter
Symbol
Input Voltage
VI
Output Voltage
VO
Test Conditions
R2 = 1.5 to 55kΩ
Typ
Max
Unit
±8
–
±35
V
±3
–
±30
V
1.66
1.8
1.95
V
Reference Voltage
VREF
Minimum Input–Output Voltage
Difference
Dual Voltage Tracking
VI–VO
–
2.5
3
V
∆VO±
–
–
1
%
Input Regulation
Regin
VI = ±18 to ±30V
–
0.02
0.1
%/V
Load Regulation
RegL
IL = 0 to 20mA
–
0.02
0.1
%
IL = 0
–
1.3
3.0
mA
TA = 0° to 75°C, VO = ±3 to ±30V
–
0.01
–
%/°C
RR
f = 120Hz
–
68
–
dB
VHO
f = 20Hz to 100kHz (between the
output terminal and ground)
VI = 10V
–
12
–
µVrms
–
–
±0.1
V
Bias Current
IS
Temperature Coefficient of
Output Voltage
Ripple Rejection
TCVO
Output Noise Voltage
Output Cut–Off Voltage
VO(off)
(Between Pin5 and Pin1)
Min
Pin Connection Diagram
(Front View)
8 Output Control
7 (+) Input
6 (+) Output
5 Voltage Adjustment
4 (–) Input
3 (–) Output
2 Balance Adjustment
1 GND
.768 (19.52) Max
1
.118 (3.0) Max
8
.264 (6.72)
Max
.165 (4.2)
Min
.100 (2.54) Typ
.700 (17.78)
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