NTE1911 3 Terminal Adjustable Negative Voltage Regulator –1.2V to –37V, 1.5A Description: The NTE1911 is an adjustable 3–terminal negative voltage regulator capable of supplying in excess of 1.5A over an output voltage range of –1.2V to 37V. This regulator is exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, if features internal current limiting, thermal shutdown and safe–area compensation, making the, virtually blowout–proof against overloads. The NTE1911 serves a wide variety of applications including local on–card regulation, programmable–output voltage regulation or precision current regulation. Features: D Output Voltage Adjustable from –1.2V to –37V D 1.5A Output Current Guaranteed, –55°C to +150°C D Line Regulation Typically 0.01%/V D Load Regulation Typically 0.3% D Excellent Thermal Regulation, 0.002%/W D 77dB Ripple Rejection D Excellent Rejection of Thermal Transients D 50ppm/°C Temperature Coefficient D Temperature–Independent Current Limit D Internal Thermal Overload Protection Absolute Maximum Ratings: Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20W Input–Output Voltage Differential, VI–O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +125°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Lead Temperature (Soldering, 10 sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C Electrical Characteristics: (Note 1) Parameter Line Regulation Symbol Test Conditions Min Typ Max Unit Regline TA = +25°C, 3V ≤ VI – VO ≤ 40V, Note 2 – 0.01 0.04 %/V 3V ≤ VI – VO ≤ 40V, Note 2 – 0.02 0.07 %/V Note 1. Unless otherwise noted, these specifications apply: 0° ≤ TJ ≤ +125°C, (VI –VO) = 5V, Pmax = 20W, and IMAX = 1.5A. Note 2. Load and line regulation are specified at constant junction temperature. Pulse testing with a low duty cycle is used. Change in VO because of heating effects is covered under the Thermal Regulation specification. Electrical Characteristics (Cont’d): (Note 1) Parameter Load Regulation Thermal Regulation Symbol Regload Test Conditions Min Typ Max Unit VO ≤ 5V, TA = +25°C, 10mA ≤ IO ≤ 1.5A Note 2 10mA ≤ IO ≤ 3A – 15 50 mV – 20 70 mV VO ≥ 5V, TA = +25°C, 10mA ≤ IO ≤ 1.5A Note 2 10mA ≤ IO ≤ 3A – 0.3 1.0 % – 0.3 1.5 % – 0.003 0.04 %VO/W – 65 100 µA – 0.2 5.0 µA Regtherm TA = +25°C, Pulse = 10ms Adjustment Pin Current IAdj Adjustment Pin Current Change ∆IAdj TA = +25°C, 10mA ≤ IL ≤ 1.5A, 2.5V ≤ (VI – VO) ≤ 40V, P ≤ 20W Reference Voltage Vref 10mA ≤ IO ≤ 1.5A, 3V ≤ (VI – VO) ≤ 40V, P ≤ 20W, TA = +25°C, Note 3 1.20 1.25 1.30 V 10mA ≤ IO ≤ 1.5A, 3V ≤ (VI – VO) ≤ 40V, P ≤ 20W, Note 3 1.213 1.250 1.287 V Temperature Stability Minimum Load Current Maximum Output Current Limit TS ILmin Imax 0° ≤ TJ ≤ +125°C – 0.6 – %VO VI – VO ≤ 10V – 1.5 6.0 mA VI – VO ≤ 40V – 2.5 10 mA VI – VO ≤ 15V, P ≤ 20W 1.5 2.2 – A VI – VO ≤ 40V, P ≤ 20W, TA = +25°C 0.15 0.4 – A RMS Noise, % of VO N TA = +25°C, 10Hz ≤ f ≤ 10kHz – 0.003 – %VO Ripple Rejection Ratio RR VO = 10V, f = 120Hz, CAdj = 0 – 60 – dB VO = 10V, f = 120Hz, CAdj = 10µF 66 77 – dB TA = +125°C, 1000 Hours – 0.3 1.0 %/1.0k Long Term Stability S Note 1. Unless otherwise noted, these specifications apply: 0° ≤ TJ ≤ +125°C, (VI –VO) = 5V, Pmax = 20W, and IMAX = 1.5A. Note 2. Load and line regulation are specified at constant junction temperature. Pulse testing with a low duty cycle is used. Change in VO because of heating effects is covered under the Thermal Regulation specification. Note 3. CAdj, when used, is connected between the adjustment pin and GND. .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) .188 (4.8) R Max .156 (3.96) Dia (2 Holes) .430 (10.92) Adjust .525 (13.35) R Max VIN/Case