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 com-
pensation. 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, program-
mable–output voltage regulation or precision current regulation.
Features:
DOutput Voltage Adjustable from –1.2V to –37V
D1.5A Output Current Guaranteed, –55°C to +150°C
DLine Regulation Typically 0.01%/V
DLoad Regulation Typically 0.3%
DExcellent Thermal Regulation, 0.002%/W
D77dB Ripple Rejection
DExcellent Rejection of Thermal Transients
D50ppm/°C Temperature Coefficient
DTemperature–Independent Current Limit
DInternal Thermal Overload Protection
Absolute Maximum Ratings:
Power Dissipation, PD20W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input–Output Voltage Differential, VI–O 40V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature Range, TJ0° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg –65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (Soldering, 10 sec), TL300°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (Note 1)
Parameter Symbol Test Conditions Min Typ Max Unit
Line Regulation 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 Ther-
mal Regulation specification.
Electrical Characteristics (Cont’d): (Note 1)
Parameter Symbol Test Conditions Min Typ Max Unit
Load Regulation Regload VO ≤ 5V, TA = +25°C, 10mA ≤ IO ≤ 1.5A –15 50 mV
Note 2 10mA ≤ IO ≤ 3A –20 70 mV
VO ≥ 5V, TA = +25°C, 10mA ≤ IO ≤ 1.5A –0.3 1.0 %
Note 2 10mA ≤ IO ≤ 3A –0.3 1.5 %
Thermal Regulation Regtherm TA = +25°C, Pulse = 10ms –0.003 0.04 %VO/W
Adjustment Pin Current IAdj –65 100 µA
Adjustment Pin Current
Change ∆IAdj TA = +25°C, 10mA ≤ IL ≤ 1.5A,
2.5V ≤ (VI – V O) ≤ 40V, P ≤ 20W –0.2 5.0 µA
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 TS0° ≤ TJ ≤ +125°C–0.6 –%VO
Minimum Load Current ILmin VI – VO ≤ 10V –1.5 6.0 mA
VI – VO ≤ 40V –2.5 10 mA
Maximum Output Current Imax VI – VO ≤ 15V, P ≤ 20W 1.5 2.2 –A
Limit VI – VO ≤ 40V, P ≤ 20W, TA = +25°C 0.15 0.4 –A
RMS Noise, % of VON 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
Long Term Stability S TA = +125°C, 1000 Hours –0.3 1.0 %/1.0k
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 Ther-
mal Regulation specification.
Note 3. CAdj, when used, is connected between the adjustment pin and GND.
1.187 (30.16)
.875 (22.2)
Dia Max
.665
(16.9)
.430
(10.92)
Seating Plane
.040 (1.02).312 (7.93) Min
.135 (3.45) Max
.350 (8.89)
VOUT
VIN/Case
Adjust
.215 (5.45)
.525 (13.35) R Max
.156 (3.96) Dia
(2 Holes)
.188 (4.8) R Max