NTE1925

NTE1925 3 Terminal Negative Voltage Regulator −24V, 1.5A TO−3 Type Package Description: The NTE1925 is a negative 3−terminal voltage regulator in a TO−3 type package suitable for numerous applications including local, on−card regulation requiring up to 1.5A. This device features thermal shutdown and current limiting making the NTE1925 remarkably rugged. Although designed primarily as a fixed voltage regulator, this device can be used with external components to obtain adjustable voltages and currents. Features: • Internal Thermal Overload Protection • Output Transistor Safe Area Protection • Internal Short Circuit Current Limit • No External Components Required Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40V Internal Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.2mW/°C Internal Power Dissipation (TC = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182mW/°C Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +150°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +150°C Thermal Resistance, Junction−to−Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5°C/W Thermal Resistance, Junction−to−Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45°C/W Electrical Characteristics: (0° ≤ TJ ≤ +125°C, VIN = −33V, IO = 0.5Aunless otherwise specified) Parameter Output Voltage Symbol VO Test Conditions Min Typ Max Unit −23 −24 −25 V −22.8 −24.0 −25.2 V TJ = +25°C, −38V ≤ VIN ≤ −27V, Note 1 − 118 480 mV TJ = +25°C, −36V ≤ VIN ≤ −30V, Note 1 − 70 240 mV TJ = +25°C, 5mA ≤ IO ≤ 1.5A, Note 1 − 150 480 mV TJ = +25°C, 250mA ≤ IO ≤ 750mA, Note 1 − 85 240 mV TJ = +25°C 5mA ≤ IO ≤ 1A, −38V ≤ VIN ≤ −27V, PO ≤ 15W Line Regulation Load Regulation Regline Regload Note 1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. Rev. 2−21 Electrical Characteristics (Cont’d): (0° ≤ TJ ≤ +125°C, VIN = −27V, IO = 0.5Aunless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Input Bias Current IB TJ = +25°C − 4.5 8.0 mA Input Bias Current Change IB −38V ≤ VIN ≤ −27V − − 1.0 mA 5mA ≤ IO ≤ 1.5A − − 0.5 mA Output Noise Voltage Vn TA = +25°C, f = 10Hz to 100kHz − 170 − μV Ripple Rejection Ratio RR IO = 20mA, f = 120Hz − 56 − dB TJ = +25°C, IO = 1A − 2.0 − V 1.3 2.5 3.3 A − −1.0 − mV/°C Dropout Voltage Peak Output Current IOmax TJ = +25°C Average Temperature Coefficient of Output Voltage IO = 5mA Note 2. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. .135 (3.45) Max .350 (8.89) .875 (22.2) Dia Max Seating Plane .312 (7.93) Min VOUT .040 (1.02) 1.187 (30.16) .665 (16.9) .215 (5.45) .156 (3.96) Dia (2 Holes) .430 (10.92) .188 (4.8) R Max .525 (13.35) R Max GND VIN/Case