NTE1927
Integrated Circuit
4–Terminal Negative Adjustable
Voltage Regulator
Description:
The NTE1927 is a 4–terminal negative adjustable voltage regulator in a TO3 type package designed
to deliver continuous load currents of up to 1A with a maximum input voltage of –40V.
Features:
D
Output Current in Excess of 1A
D
Negative Output –30V to –2.2V
D
Internal Thermal Overload Protection
D
Internal Short Circuit Protection
D
Output Transistor Safe–Area Protection
Absolute Maximum Ratings:
Input Voltage, V
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40V
Control Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –V
OUT
≤
–V
≤
0
Power Dissipation, P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
Operating Junction Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to 150°C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Lead Temperature (During Soldering, 60sec), T
L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Electrical Characteristics:
(0°
≤
T
J
≤
+125°C, V
IN
= –10V, I
OUT
= 500mA, C
IN
= 2µF,
C
OUT
= 1µF, Note 1, Note 2 unless otherwise specified)
Parameter
Input Voltage Range
Nominal Output Voltage
Range
Output Voltage Tolerance
T
J
= +25°C
V
IN
= V
OUT
– 5V
V
OUT
– 15V
≤
V
IN
≤
V
OUT
– 3V,
5mA
≤
I
OUT
≤
1A, P
D
≤
15W,
I
IN(max)
= –38V
T
J
= +25°C
Test Conditions
Min
–40
–30
–
–
Typ
–
–
–
–
Max
–7.0
–2.23
4.0
5.0
Unit
V
V
% (V
OUT
)
% (V
OUT
)
Note 1. V
OUT
is defined as:
V
OUT
=
R1 + R2
(–2.23)
R2
Note 2. The convention for negative regulators in the algabraic value, thus –15V is less than –10V.
Electrical Characteristics (Cont’d):
(0°
≤
T
J
≤
+125°C, V
IN
= –10V, I
OUT
= 500mA, C
IN
= 2µF,
C
OUT
= 1µF, Note 1, Note 2 unless otherwise specified)
Parameter
Line Regulation
Test Conditions
V
OUT
≥
–10V,
(V
OUT
–15V)
≤
V
IN
≤
(V
OUT
–2.5V)
V
OUT
≤
–10V,
(V
OUT
–15V)
≤
V
IN
≤
(V
OUT
–3V)
V
OUT
≤
–10V,
(V
OUT
–7V)
≤
V
IN
≤
(V
OUT
–3V)
Load Regulation
250mA
≤
I
OUT
≤
750mA
5mA
≤
I
OUT
≤
1.5A
Control Pin Current
T
J
= +25°C
T
J
= +25°C
–18V
≤
V
IN
≤
–8V, V
OUT
= –5V, f = 120Hz
T
J
= +25°C, 10Hz
≤
f
≤
100kHz, V
OUT
= –5V, I
OUT
=
5mA
Note 3
T
J
= +25°C, V
IN
= –30V
T
J
= +25°C
T
J
= –55° to +25°C
T
J
= +25° to +150°C
T
J
= +25°C
V
OUT
= –5V,
I
OUT
= 5mA
T
J
= +25°C,
V
IN
= V
OUT
–5V
T
J
= +25°C
Min
–
–
–
–
–
–
–
Quiescent Current
–
–
Ripple Rejection
Output Noise Voltage
Dropout Voltage
Short Circuit Current
Peak Output Current
Average Temperature
Coefficient of
Output Voltage
Control Pin Voltage
(Reference)
50
–
–
–
1.3
–
–
Typ
–
–
–
–
–
0.4
–
0.5
–
60
25
–
0.25
2.1
–
–
Max
1.0
0.75
0.67
1.0
2.0
2.0
3.0
1.5
2.0
–
80
2.3
1.2
3.3
0.3
0.3
Unit
% (V
OUT
)
% (V
OUT
)
% (V
OUT
)
% (V
OUT
)
% (V
OUT
)
µA
µA
µA
µA
dB
µV/V
OUT
V
A
A
mV/°C/V
OUT
mV/°C/V
OUT
V
V
–2.32 –2.23 –2.14
–2.35
–
–2.11
Note 1. V
OUT
is defined as:
V
OUT
=
R1 + R2
(–2.23)
R2
Note 2. The convention for negative regulators in the algabraic value, thus –15V is less than –10V.
Note 3. Dropout Voltage is defined as that input–output voltage differential which causes the output
voltage to decrease by 5% of its initial value.
Note 4. All characteristics except noise voltage and ripple rejection ratio are measured using pulse
techniques (t
W
≤
10ms, duty cycle
≤
5%). Output voltage changes due to changes in internal
temperature must be taken into account separately.
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