NTE NTE1927 Datasheet
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
Control Pin Voltage –V
Power Dissipation, P
Operating Junction Temperature Range, T
Storage Temperature Range, T
Lead Temperature (During Soldering, 60sec), T
Internally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D
opr
stg
L
–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OUT
0° to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–40V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
≤ –V ≤ 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+300°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics
Parameter Test Conditions Min Typ Max Unit
Input Voltage Range TJ = +25°C –40 – –7.0 V
Nominal Output Voltage
Range
Output Voltage Tolerance V
Note 1. V
is defined as:
OUT
: (0° ≤ TJ ≤ +125°C, VIN = –10V, I
C
VIN = V
– 15V ≤ VIN ≤ V
OUT
5mA ≤ I
I
IN(max)
= 1µF, Note 1, Note 2 unless otherwise specified)
OUT
– 5V –30 – –2.23 V
OUT
TJ = +25°C – – 4.0 % (V
(–2.23)
≤ 1A, PD ≤ 15W,
OUT
= –38V
V
=
OUT
– 3V,
OUT
R1 + R2
R2
= 500mA, CIN = 2µF,
OUT
– – 5.0 % (V
OUT
OUT
)
)
Note 2. The convention for negative regulators in the algabraic value, thus –15V is less than –10V.
Electrical Characteristics (Cont’d): (0° ≤ TJ ≤ +125°C, VIN = –10V, I
C
= 1µF, Note 1, Note 2 unless otherwise specified)
OUT
= 500mA, CIN = 2µF,
OUT
Parameter Test Conditions Min Typ Max Unit
V
Line Regulation
≥ –10V,
OUT
(V
–15V) ≤ VIN ≤ (V
OUT
V
≤ –10V,
OUT
(V
–15V) ≤ VIN ≤ (V
OUT
V
≤ –10V,
OUT
(V
–7V) ≤ VIN ≤ (V
OUT
Load Regulation 250mA ≤ I
5mA ≤ I
OUT
OUT
≤ 1.5A
OUT
≤ 750mA
OUT
OUT
–2.5V)
–3V)
–3V)
TJ = +25°C
TJ = +25°C,
VIN = V
OUT
–5V
– – 1.0 % (V
– – 0.75 % (V
– – 0.67 % (V
– – 1.0 % (V
– – 2.0 % (V
Control Pin Current TJ = +25°C – 0.4 2.0 µA
– – 3.0 µA
Quiescent Current TJ = +25°C – 0.5 1.5 µA
– – 2.0 µA
OUT
OUT
OUT
OUT
OUT
)
)
)
)
)
Ripple Rejection –18V ≤ VIN ≤ –8V, V
Output Noise Voltage TJ = +25°C, 10Hz ≤ f ≤ 100kHz, V
= –5V, f = 120Hz 50 60 – dB
OUT
OUT
= –5V, I
OUT
=
– 25 80 µV/V
OUT
5mA
Dropout Voltage Note 3 – – 2.3 V
Short Circuit Current TJ = +25°C, VIN = –30V – 0.25 1.2 A
Peak Output Current TJ = +25°C 1.3 2.1 3.3 A
Average Temperature
Coefficient of
Output Voltage
Control Pin Voltage
(Reference)
Note 1. V
is defined as:
OUT
TJ = –55° to +25°C
TJ = +25° to +150°C
V
I
OUT
OUT
= –5V,
= 5mA
TJ = +25°C –2.32 –2.23 –2.14 V
=
R1 + R2
R2
(–2.23)
V
OUT
– – 0.3 mV/°C/V
– – 0.3 mV/°C/V
–2.35 – –2.1 1 V
OUT
OUT
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
≤ 10ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal
W
temperature must be taken into account separately.
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