NTE NTE923

NTE923 & NTE923D
Integrated Circuit
Precision Voltage Regulator
Description:
The NTE923 and NTE923D are voltage regulators designed primarily for series regulator applications. By themselves, these devices will supply output currents up to 150mA; but, external transistors
can be added to provide any desired load current. The circuits feature extremely low standby current
drain, and provision is made for either linear or foldback current limiting.
These devices are also useful in a wide range of other applications such as shunt regulators, current
regulators, and temperature controllers.
Features:
D 150mA Output Current without External Pass Transistor
D Output Currents in Excess of 10A Possible by Adding External Transistors
D Input Voltage: 40V Max
D Output Voltage Adjustable from 2V to 37V
D Can be Used as Either a Linear or a Switching Regulator
Absolute Maximum Ratings:
Pulse Voltage from V+ to V– (50ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V
Continuous Voltage from V+ to V– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Input–Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Maximum Amplifier Input Voltage
Either Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5V
Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0V
Current from VZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA
Current from VREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15mA
Internal Power Dissipation
NTE923 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mW
NTE923D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 660mW
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range
NTE923 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
NTE923D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Lead Temperature (During Soldering, 4sec max)
NTE923 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
NTE923D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260°C
Electrical Characteristics: (Note 1)
Parameter
Test Conditions
Line Regulation
Min
Typ
Max
Unit
–
0.01
0.1
% VOUT
–
–
0.3
% VOUT
VIN = 12V to 40V
–
0.1
0.5
% VOUT
IL = 1mA to 50mA
–
0.03
0.2
% VOUT
0° ≤ TA ≤ +70°C
–
–
0.6
% VOUT
CREF = 0
–
74
–
dB
CREF = 5µF
–
86
–
dB
VIN = 12V to 15V
0° ≤ TA ≤ +70°C
Load Regulation
Ripple Rejection
f = 50Hz to 10kHz
Average Temperature Coefficient of
Output Voltage
0° ≤ TA ≤ +70°C, Note 2
–
Short Circuit Current Limit
RSC = 10Ω, VOUT = 0
–
65
–
mA
6.80
7.15
7.50
V
–
86
–
µVrms
–
2.5
–
µVrms
–
0.05
–
%/1000Hrs
–
1.7
4.0
mA
Input Voltage Range
9.5
–
40
V
Output Voltage Range
2.0
–
37
V
Input–Output Voltage Differential
3.0
–
38
V
–
105
–
°C/W
Board mount in still air
–
225
–
°C/W
Board mount in 400LF/Min Air flow
–
90
–
°C/W
–
25
–
°C/W
Reference Voltage
Output Noise Voltage
BW = 100Hz to 10kHz CREF = 0
CREF = 5µF
Long Term Stability
Standby Current Drain
IL = 0, VIN = 30V
Thermal Resistance, Junction to Ambient
NTE923D
NTE923
Thermal Resistance, Junction to Case
0.003 0.015
%/°C
Note 1. Unless otherwise otherwise specified, TA = +25°C, VIN = V+ = VC = 12V, V– = 0, VOUT = 5V,
IL = 1mA, RSC = 0, C! = 100pF, CREF = 0 and divider impedance as seen by error amplifier
≤ 10kΩ. Line and load regulation specifications are given for the condition of constant chip
temperature. Temperature drifts must be taken into account separately for high dissipation
conditions.
Note 2. Guaranteed by correlation to other tests.
Note 3. For metal can applications where VZ is required, an external 6.2V zener diode should be connected in series with VOUT.
Pin Connection Diagram
NTE923
(Top View)
Vout
VC
7
V (+)
NTE923D
6
V (–)/Case
5
8
Freq Comp 9
4 Vref
Current Limit 10
3
Non–Invert Input
1
Current Sense
2
N.C.
1
14 N.C.
Current Limit
2
13 Freq Comp
Current Sense
3
12 V (+)
Invert Input
4
11 VC
Non–Invert Input
5
10 Vout
Vref 6
V (–)
Invert Input
7
9 VZ
8
N.C.
NTE923
.335 (8.52) Dia Max
.260
(6.6)
Max
.500
(12.7)
Min
.018 (0.45) Dia Typ
.115 (2.92)
4
3
2
5
6
1
.370
(9.4)
Max
7
10
9
8
.230 (5.84) Dia
NTE923D
14
8
1
7
.785 (19.95) Max
.300 (7.62)
.200 (5.08)
Max
.100 (2.45)
.600 (15.24)
.099 (2.5) Min