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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, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40V Control Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -VOUT -V 0 Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Operating Junction Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 150C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Lead Temperature (During Soldering, 60sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300C Electrical Characteristics: (0 TJ +125C, VIN = -10V, IOUT = 500mA, CIN = 2F, COUT = 1F, Note 1, Note 2 unless otherwise specified)
Parameter Input Voltage Range Nominal Output Voltage Range Output Voltage Tolerance TJ = +25C VIN = VOUT - 5V VOUT - 15V VIN VOUT - 3V, 5mA IOUT 1A, PD 15W, IIN(max) = -38V TJ = +25C Test Conditions Min -40 -30 - - Typ - - - - Max -7.0 -2.23 4.0 5.0 Unit V V % (VOUT) % (VOUT)
Note 1. VOUT is defined as:
VOUT =
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 TJ +125C, VIN = -10V, IOUT = 500mA, CIN = 2F, COUT = 1F, Note 1, Note 2 unless otherwise specified)
Parameter Line Regulation Test Conditions VOUT -10V, (VOUT-15V) VIN (VOUT-2.5V) VOUT -10V, (VOUT-15V) VIN (VOUT-3V) VOUT -10V, (VOUT-7V) VIN (VOUT-3V) Load Regulation 250mA IOUT 750mA 5mA IOUT 1.5A Control Pin Current TJ = +25C TJ = +25C -18V VIN -8V, VOUT = -5V, f = 120Hz TJ = +25C, 10Hz f 100kHz, VOUT = -5V, IOUT = 5mA Note 3 TJ = +25C, VIN = -30V TJ = +25C TJ = -55 to +25C TJ = +25 to +150C TJ = +25C VOUT = -5V, IOUT = 5mA TJ = +25C, VIN = VOUT-5V TJ = +25C 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 % (VOUT) % (VOUT) % (VOUT) % (VOUT) % (VOUT) A A A A dB V/VOUT V A A mV/C/VOUT mV/C/VOUT V V
-2.32 -2.23 -2.14 -2.35 - -2.11
Note 1. VOUT is defined as:
VOUT =
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 (tW 10ms, duty cycle 5%). Output voltage changes due to changes in internal temperature must be taken into account separately.
Pin Connection Diagram (Bottom View)
GND 1 2
Adjust
4 VIN/Case
3 VOUT Case/GND
.125 (3.17) .325 (8.28) .835 (21.1)
.500 (12.7) 1 .225 (5.72) 1.197 (30.4) .675 (17.15)
.043 (1.09) Dia
2 .156 (3.96) Dia (2 Holes)
.440 (11.17)
.180 (4.47) R 3 54 Typ .525 (13.35) R Max
4/Case
18 Typ

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