NTE1918
3 Terminal Positive Voltage Regulator
15V, 3A
Description:
The NTE1918 is a positive 3–terminal voltage regulator in a TO3 type package capable of driving
loads in excess of 3A. This device employs internal current limiting, thermal shutdown, and safe–area
compensation.
Although designed primarily as a fixed voltage regulator, the NTE1918 can be used with external com-
ponents to obtain adjustable voltages and currents.
Features:
DOutput Current in Excess of 3A
DPower Dissipation: 30W
DInternal Thermal Overload Protection
DOutput Transistor Safe Area Protection
DInternal Short Circuit Current Limit
DNo External Components Required
Absolute Maximum Ratings:
Input Voltage , VIN 40V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (TA = +25°C, Note 1), PDInternally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (TC = +25°C, Note 1), PDInternally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature Range, TJ0° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg –65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, Junction–to–Case, RthJC 2.5°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, Junction–to–Ambient, RthJA 35°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Although power dissipation is internally limited, specifications apply only for PO ≤ 30W.
Electrical Characteristics: (0° ≤ TJ ≤ +125°C, VIN = 20V, IO = 3Aunless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Output Voltage VOTJ = +25°C, 5mA ≤ IO ≤ 3A 14.4 15.0 15.6 V
5mA ≤ IO ≤ 2A, 17.5V ≤ VIN ≤ 30V 14.25 15.00 15.75 V
Line Regulation Regline TJ = +25°C, 20V ≤ VIN ≤ 26V, Note 2 – 7.5 55 mV
18V ≤ VIN ≤ 30V, IO = 1A, Note 2 – 7.5 55 mV
Load Regulation Regload TJ = +25°C, 5mA ≤ IO ≤ 3A, Note 2 – 10 30 mV
5mA ≤ IO ≤ 3A, Note 2 – 15 80 mV
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.
Electrical Characteristics (Cont’d): (0° ≤ TJ ≤ +125°C, VIN = 20V, IO = 3Aunless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Quiescent Current IQTJ = +25°C, 5mA ≤ IO ≤ 3A –3.5 5.0 mA
5mA ≤ IO ≤ 3A –4.0 6.0 mA
Quiescent Current Change IQTJ = +25°C, 17.6V ≤ VIN ≤ 40V, IO = 5mA –0.3 1.0 mA
18V ≤ VIN ≤ 30V, IO = 1A –0.3 1.0 mA
Output Noise Voltage VnTJ = +25°C, f = 10Hz to 100kHz –10 –µV
Output Resistance rOf = 1kHz –2–mΩ
Short Circuit Current Limit Isc TA = +25°C, VIN = 40V –0.2 1.2 A
Ripple Rejection Ratio RR TJ = +25°C, 18.5V ≤ VIN ≤ 28.5V, f = 120Hz,
IO = 2A 55 65 –dB
Dropout Voltage TJ = +25°C, IO = 3A –2.2 2.5 V
Peak Output Current IOmax TJ = +25°C–5–A
Average Temperature
Coefficient of Output
Voltage
IO = 5mA –0.6 –mV/°C
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.
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
Common/Case
VIN
.215 (5.45)
.525 (13.35) R Max
.156 (3.96) Dia
(2 Holes)
.188 (4.8) R Max