NTE923 NTE Electronics, Inc., NTE923 Datasheet - Page 3
NTE923
Manufacturer Part Number
NTE923
Description
Regulator, Switching Voltage; PDIP; 40V Vs; 2 to 37V Vo; 150mA Io; 800mW; +70degC
Manufacturer
NTE Electronics, Inc.
Type
Voltage Reference, Voltage Regulatorr
Datasheet
1.NTE923D.pdf
(4 pages)
Specifications of NTE923
Application
Shunt regulators, current regulator, and temperature controllers
Current, Output
150 mA
Load Regulation
0.03% (Typ.)
Package Type
DIP-14
Power Dissipation
800 mW
Regulation, Line
0.1 %/V
Regulation, Load
0.03 %/V
Regulator Type
Switching
Resistance, Thermal, Junction To Case
25 °C/W
Temperature, Operating, Maximum
+70 °C
Temperature, Operating, Minimum
0 °C
Temperature, Operating, Range
0 to +70 °C
Voltage, Input
40 V
Voltage, Noise
86 μV
Voltage, Output
37 V
Voltage, Supply
40 V (Max.)
TABLE 1. Resistor Values (kW) for Standard Output Voltage:
Note 4. Figures in parentheses may be used if R1/R2 divider is placed on opposite input of error amp.
Note 5. Replace R1/R2 in figures with divider shown in Figure .
Note 6. V+ and V
TABLE 2. Formulae for Intermediate Output Voltages:
Typical Applications: (Pin numbers relative to the plastic package)
Note: R3 =
for minimum temperature drift.
Typical Performance
Regulated Output Voltage
Line Regulation (∆V
Load Regulation (∆I
Voltage
Outputs from +7 to +37 Volts
Output
Output
Outputs from +2 to +7 Volts
V
V
V
+3.0
+3.6
+5.0
+6.0
+9.0
+12
+15
+28
+45
+75
OUT
OUT
OUT
(Figures 1, 4, 5, 6, 9, 12)
(Figures 2, 4, 5, 6, 9, 12)
= V
=
= V
R1 + R2
R1 x R2
(
(
(
2, 4, (5, 6, 9, 12) 1.87 7.15 0.75
2, 4, (5, 6, 9, 12) 4.87 7.15
2, 4, (5, 6, 9, 12) 7.87 7.15
2, 4, (5, 6, 9, 12) 21.0 7.15
1, 5, 6, 9, 12 (4) 4.12 3.01
1, 5, 6, 9, 12 (4) 3.57 3.65
1, 5, 6, 9, 12 (4) 2.15 4.99 0.75
1, 5, 6, 9, 12 (4) 1.15 6.04
Figure 1. Basic Low Voltage Regultor
IN
L
REF
REF
= 50mA)
Applicable
= 3V)
Figures
(Note 4)
C
REF
x
x
7
7
R1 + R2
R1 + R2
(V
R1
R2
CC
OUT
R2
R2
V+
V−
must be connected to a +3V or greater supply.
0.5mV
1.5mV
= 2 to 7 Volts)
V
N.I.
V
REF
IN
5V
)
)
)
3.57 48.7
3.57 78.7
V
R1
OUT
INV
CS
CL
COMP
Output
V
Fixed
CC
+5%
V
V
OUT
OUT
R2
R
R3
C1 100pF
Outputs from +4 to +250 Volts
Outputs from −6 to −250 Volts
SC
=
=
(
(
R1
1.8
1.5
0.5
2.0
3.3
5.6
2.2
2.2
V
V
+10% (Note 5)
REGULATED
OUTPUT
REF
REF
Adjustable
2
(Figures 3, 8, 10)
2
Output
(Figure 7)
0.5
0.5
0.5
0.5
1.0
1.0
1.0
1.0
P1
10
10
x
x
R2 − R1
R1 + R2
R1
R1
R2
1.2
1.5
2.2
2.7
2.7
3.0
3.0
2.0
39
68
Typical Performance
Regulated Output Voltage
Line Regulation (∆V
Load Regulation (∆I
Note: R3 =
for minimum temperature drift.
R3 may be eliminated for
minimum component count.
−6 (Note 6)
)
)
Voltage
Output
Output
; R3 = R4
; R3 = R4
+100
+250
−100
−250
−12
−15
−28
−45
−9
R1 + R2
R1 x R2
Figure 2. Basic High Voltage Regultor
IN
L
= 50mA)
= 3V)
Applicable
I
Figures
(Note 4)
KNEE
3, (10)
3, 10
3, 10
3, 10
3, 10
I
SHORT CKT
(V
7
7
8
8
8
OUT
=
R3
Foldback Current Limiting
(
V+
V−
= 27to 37 Volts)
1.5mV
4.5mV
V
N.I.
V
V
R
REF
IN
15V
OUT
SC
3.57 102
3.57 255
3.57 2.43
3.48 5.36
3.57 8.45
3.65 11.5
3.57 24.3
3.57 41.2
3.57 97.6
3.57 249
Current Limiting
I
R1
LIMIT
Output
V
=
Fixed
OUT
INV
CS
+5%
R4
CL
COMP
(
V
R3
CC
V
=
R2
SENSE
R
100pF
+
C1
R
V
SC
SC
V
SENSE
R
SENSE
SC
R1
2.2
2.2
1.2
1.2
1.2
1.2
1.2
2.2
2.2
2.2
+10% (Note 5)
R1
R2
x
Adjustable
R
REGULATED
OUTPUT
R3 + R4
Output
SC
(R3 + R4)
0.5
0.5
0.5
0.5
0.5
P1
10
10
10
10
10
R4
R4
0.75
240
240
R2
2.0
3.3
4.3
91
10
33
91
)
)