Voltage Regulator. NTE1901 Datasheet

NTE1901 Regulator. Datasheet pdf. Equivalent

Part NTE1901
Description Integrated Circuit Negative Adjustable Voltage Regulator
Feature NTE1901 Integrated Circuit Negative Adjustable Voltage Regulator, –1.2V to –37V, 100mA Description: .
Manufacture NTE
Datasheet
Download NTE1901 Datasheet




NTE1901
NTE1901
Integrated Circuit
Negative Adjustable Voltage Regulator,
–1.2V to –37V, 100mA
Description:
The NTE1901 is an adjustable 3–terminal negative voltage regulator in a TO92 type package capable
of supplying 100mA over a –12,V to –37V output range. It is exceptionally easy to use and both line
and load regulation are better than standard fixed regulators.
In addition to higher performance than fixed regulators, the NTE1901 offers full overload protection.
Included on the chip are current limit, thermal overload protection and safe area protection. All over-
load protection circuitry remains fully functional even if the adjustment terminal is disconnected.
Normally, no capacitors are needed unless the device is situated more than 6 inches from the input
filter capacitor in which case an input bypass is needed. An optional output capacitor can be added
to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple
rejection ratios which are difficult to achieve with standard 3–terminal regulators.
Besides replacing fixed regulators, the NTE1901 is useful in a wide variety of other applications.
Since the regulator is “floating” and sees only the input–to–output differential voltage, supplies of sev-
eral hundred volts can be regulated as long as the maximum input–to–output differential is not ex-
ceeded.
Also, it makes an especially simple adjustable switching regulator, a programmable output regulator,
or by connecting a fixed resistor between the adjustment and output, the NTE1901 can be used as
a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the
adjustment terminal to ground which programs the output to 1.2V where most loads draw little current.
Features:
D Adjustable Output Down to 1.2V
D Guaranteed 100mA Output Current
D Line Regulation Typically 0.01%/V
D Load Regulation Typically 0.1%
D Current Limit Constant with Temperature
D Eliminates the Need to Stock Many Voltages
D Standard 3–Lead Transistor Package
D 80db Ripple Rejection
D Output is Short Circuit Protected



NTE1901
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
InputOutput Voltage Differential, VI VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55° to +150°C
Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Electrical Characteristics: (Note 1 unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Line Regulation
RegLine TA = +25°C, 3V (VIN VO) 40V, Note 2 0.01 0.04 %/V
3V (VIN VO) 40V, Note 2
0.02 0.07 %/V
Load Regulation
Thermal Regulation
RegLoad
TA = +25°C, 5mA IO 100mA, Note 2
5mA IO 100mA, Note 2
TA = +25°C, 10ms Pulse
0.1 0.5 %
0.1 0.5 %
0.04 0.2 %/W
Adjustment Pin Current
IAdj
50 100 µA
Adjustment Pin Current Change
Reference Voltage
IAdj 5mA IL 100mA, 3V (VIN VO) 40V 0.2 5.0 µA
Vref 5mA IL 100mA, 3V (VIN VO) 40V, 1.20 1.25 1.30 V
P 625mW, Note 3
Temperature Stability
TS 25°C TJ +125°C
0.65 %
Minimum Load Currnt
MaximumOutput Current Limit
IL(min)
Imax
(VIN VO) 40V
3V (VIN VO) 15V
3V (VIN VO) 13V
3.5 5.0 mA
2.2 3.5 mA
100 200 300 mA
(VIN VO) 40V
25 50 150 mA
RMS Output Noise, % of VOUT N TA = +25°C, 10Hz f +10kHz
0.003 %
Ripple Rejection Ratio
Long Term Stability
RR VOUT = 10V, f = 120Hz, CADJ = 0
CADJ = 10µF
S TJ = +125°C, 100 Hours
65 dB
66 80 dB
0.3 1.0 %
Note 1. Unless otherwise noted, these specifications apply: 25° ≤ TJ +125°C, VIN VOUT = 5V,
IOUT = 40mA, and IMAX = 100mA. Although power dissipation is internally limited, these
specifications are applicable for power dissipations up to 625mW.
Note 2. Regulation is measured at constant junction temperature, using pulse testing with low duty
cycle. Changes in output voltage due to heating effects are covered under the specifications
for thermal regulation.
Note 3. Thermal resistance o the TO92 package is 180°C/W junction to ambient with 0.4leads from
a PC board and 160°C/W junction to ambient with 0.125lead length to PC board.







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