NTE NTE970

NTE970
Linear Integrated Circuit
3–Terminal Adjustable Positive Voltage Regulator
1.2V to 33V, 3A
Description:
The NTE970 is an adjustable 3–terminal positive voltage regulator in a TO3 type package capable
of supplying in excess of 3 Amps over a 1.2V to 33V output range.
Features:
D Adjustable Output Down to 1.2V
D Guaranteed 3A Output Current
D Line Regulation Typically 0.005%/V
D Load Regulation Typically 0.1%
D Thermal Regulation
D Current Limit Constant with Temperature
Absolute Maximum Ratings:
Input–Output Voltage Differential, VI–VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Thermal Resistance, Junction–to–Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5°C/W
Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Electrical Characteristics: (VI –VO = 5V, IO = 1.5A, Pmax = 30W, 0° ≤ TJ ≤ +125°C unless
otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Line Regulation
Regline
TA = +25°C, 3V ≤ VI – VO ≤ 35V, Note 1
–
0.005
0.030
%/V
Load Regulation
Regload
VO ≤ 5V
–
5
25
mV
–
0.1
0.5
%VO
VO ≥ 5V
TA = +25°C, 0mA ≤ IO ≤ 3A,
Note 1
Note 1. Regulation is measured at constant junction temperature. Change in output voltage due to
heating effects must be taken into account separately. Pulse testing with low duty cycle is
used.
Electrical Characteristics (Cont’d): (VI –VO = 5V, IO = 1.5A, Pmax = 30W, 0° ≤ TJ ≤ +125°C
unless otherwise specified)
Parameter
Symbol
Thermal Regulation
Test Conditions
Min
Typ
Max
Unit
–
0.002
–
%VO/W
–
50
100
µA
Regtherm TA = +25°C, Pulse = 20ms
Adjustment Pin Current
IAdj
Adjustment Pin Current Change
∆IAdj
10mA ≤ IL ≤ 3A, 3V ≤ (VI – VO) ≤ 35V
–
0.2
5.0
µA
Reference Voltage
Vref
10mA ≤ IO ≤ 3A, 3V ≤ (VI – VO) ≤ 35V,
P ≤ 30W
1.20
1.25
1.30
V
Line Regulation
Regline
3V ≤ (VI – VO) ≤ 35V, Note 1
–
0.02
0.07
%/V
Load Regulation
Regload
VO ≤ 5V
–
20
70
mV
VO ≥ 5V
–
0.3
1.5
%VO
0° ≤ TJ ≤ +125°C
–
1
–
%VO
Temperature Stability
TS
10mA ≤ IO ≤ 3A, Note 1
Minimum Load Current
ILmin
VI – VO = 35V
–
3.5
10
mA
Maximum Output Current Limit
Imax
VI – VO ≤ 10V
3.0
4.5
–
A
VI – VO = 30V
–
1.0
–
A
TA = +25°C, 10Hz ≤ f ≤ 10kHz
–
0.003
–
%VO
VO = 10V, f = 120Hz
–
65
–
dB
CAdj = 10µF
66
86
–
dB
TA = +125°C
–
0.3
1.0
%/1.0k
RMS Noise, % of VO
N
Ripple Rejection Ratio
RR
Long Term Stability
S
Note 1. Regulation is measured at constant junction temperature. Change in output voltage 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
VIN
.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
Adjust
.525 (13.35) R Max
VOUT/Case