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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 +70C Storage Temperature Range NTE923 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C NTE923D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150C Lead Temperature (During Soldering, 4sec max) NTE923 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300C NTE923D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260C
Electrical Characteristics: (Note 1)
Parameter Line Regulation Test Conditions VIN = 12V to 15V 0 TA +70C VIN = 12V to 40V Load Regulation IL = 1mA to 50mA 0 TA +70C Ripple Rejection f = 50Hz to 10kHz CREF = 0 CREF = 5F Average Temperature Coefficient of Output Voltage Short Circuit Current Limit Reference Voltage Output Noise Voltage BW = 100Hz to 10kHz CREF = 0 CREF = 5F Long Term Stability Standby Current Drain Input Voltage Range Output Voltage Range Input-Output Voltage Differential Thermal Resistance, Junction to Ambient NTE923D NTE923 Board mount in still air Board mount in 400LF/Min Air flow Thermal Resistance, Junction to Case IL = 0, VIN = 30V 0 TA +70C, Note 2 RSC = 10, VOUT = 0 Min - - - - - - - - - 6.80 - - - - 9.5 2.0 3.0 - - - - Typ 0.01 - 0.1 0.03 - 74 86 Max 0.1 0.3 0.5 0.2 0.6 - - Unit % VOUT % VOUT % VOUT % VOUT % VOUT dB dB %/C mA V Vrms Vrms %/1000Hrs mA V V V C/W C/W C/W C/W
0.003 0.015 65 7.15 86 2.5 0.05 1.7 - - - 105 225 90 25 - 7.50 - - - 4.0 40 37 38 - - - -
Note 1. Unless otherwise otherwise specified, TA = +25C, VIN = V+ = VC = 12V, V- = 0, VOUT = 5V, IL = 1mA, RSC = 0, C! = 100pF, CREF = 0 and divider impedance as seen by error amplifier 10k. 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)
VC 7 V (+) 8 6 V (-)/Case 5 Vout N.C. Current Limit Current Sense Freq Comp 9 Current Limit 10 1 Current Sense 2 Invert Input 4 Vref Invert Input Non-Invert Input 3 Non-Invert Input 1 2 3 4 5 14 N.C. 13 Freq Comp 12 V (+) 11 VC 10 Vout 9 VZ 8 N.C.
NTE923D
Vref 6 V (-) 7
NTE923 .335 (8.52) Dia Max .260 (6.6) Max
.500 (12.7) Min
.018 (0.45) Dia Typ .115 (2.92) 3 2 1 10 7 9 8 .230 (5.84) Dia 4 5 6 .370 (9.4) Max
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

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