NTE1927

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 150°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Lead Temperature (During Soldering, 60sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C Electrical Characteristics: (0° ≤ TJ ≤ +125°C, VIN = –10V, IOUT = 500mA, CIN = 2µF, COUT = 1µF, Note 1, Note 2 unless otherwise specified) Parameter Test Conditions Min Typ Max Unit Input Voltage Range TJ = +25°C –40 – –7.0 V Nominal Output Voltage Range VIN = VOUT – 5V –30 – –2.23 V Output Voltage Tolerance VOUT – 15V ≤ VIN ≤ VOUT – 3V, 5mA ≤ IOUT ≤ 1A, PD ≤ 15W, IIN(max) = –38V – – 4.0 % (VOUT) – – 5.0 % (VOUT) Note 1. VOUT is defined as: VOUT = TJ = +25°C 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 ≤ +125°C, VIN = –10V, IOUT = 500mA, CIN = 2µF, COUT = 1µF, Note 1, Note 2 unless otherwise specified) Parameter Line Regulation Load Regulation Test Conditions Min Typ Max Unit – – 1.0 % (VOUT) VOUT ≤ –10V, (VOUT–15V) ≤ VIN ≤ (VOUT–3V) – – 0.75 % (VOUT) VOUT ≤ –10V, (VOUT–7V) ≤ VIN ≤ (VOUT–3V) – – 0.67 % (VOUT) – – 1.0 % (VOUT) – – 2.0 % (VOUT) – 0.4 2.0 µA – – 3.0 µA – 0.5 1.5 µA – – 2.0 µA VOUT ≥ –10V, (VOUT–15V) ≤ VIN ≤ (VOUT–2.5V) 250mA ≤ IOUT ≤ 750mA 5mA ≤ IOUT ≤ 1.5A Control Pin Current Quiescent Current TJ = +25°C TJ = +25°C, VIN = VOUT–5V TJ = +25°C TJ = +25°C Ripple Rejection –18V ≤ VIN ≤ –8V, VOUT = –5V, f = 120Hz 50 60 – dB Output Noise Voltage TJ = +25°C, 10Hz ≤ f ≤ 100kHz, VOUT = –5V, IOUT = 5mA – 25 80 µV/VOUT 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 TJ = –55° to +25°C – – 0.3 mV/°C/VOUT – – 0.3 mV/°C/VOUT Control Pin Voltage (Reference) TJ = +25°C TJ = +25° to +150°C Note 1. VOUT is defined as: VOUT = VOUT = –5V, IOUT = 5mA –2.32 –2.23 –2.14 V –2.35 V – –2.11 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 Adjust 1 2 4 3 VOUT VIN/Case Case/GND .125 (3.17) .835 (21.1) .325 (8.28) .500 (12.7) 1 .043 (1.09) Dia 1.197 (30.4) .225 (5.72) .675 (17.15) 2 .156 (3.96) Dia (2 Holes) .440 (11.17) .180 (4.47) R 3 4/Case 18° Typ 54° Typ .525 (13.35) R Max