NTE1952
Integrated Circuit
Positive 3 Terminal Voltage Regulator,
Low Dropout Voltage, 8V, 1A
Description:
The NTE1952 positive voltage regulator features the ability to source 1A of output current with a drop-
out voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore,
a quiescent current reduction circuit has been included which reduces the ground current when the
differential between the input voltage and the output voltage exceeds approximately 3V. The quies-
cent current with 1A of output current and an input–output differential of 5V is therefore only 30mA.
High quiescent currents only exist when the regulator is in the dropout mode (VIN – VOUT ≤ 3V).
Features:
DDropout Voltage: 0.5V (Typ) @ IO = 1A
DOutput Current in Excess of 1A
DReverse Battery Protection
DInternal Short Circuit Current Limit
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Input Voltage, VI
Survival Voltage (≤100ms) 60V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operational Voltage 26V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Power Dissipation (Note 1), PDInternally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
maximum Junction Temperature, TJ+150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, TA–40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Junction Temperature Range, Tstg –65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering, 10sec max), TL+230°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Thermal resistance without a heatsink for junction–to–case temperature is 3°C/W. Thermal
resistance case–to–ambient is 50°C/W
Electrical Characteristics: (VIN = 13V, IO = 1A, COUT = 22µF, CO = 0.1µF, TJ = +25°C
unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Output Voltage VOUT 5mA ≤ IO ≤ 1A 7.76 8.00 8.24 V
Line Regulation Regline 10V ≥ VIN ≥ 26V, IO = 5 mA –20 80 mV
Load Regulation Regload 50mA ≤ IO ≤ 1A –55 50 mV
Output Impedance ZO100mADC and 20mArms, fo = 120Hz –55 –MΩ
Quiescent Current 10V ≥ VIN ≥ 26V, IO = 5 mA –10 15 mA
VIN = 13V, IO = 1A –30 45 mA
Output Noise Voltage Vn10Hz – 100kHz, IO = 5mA –240 –µVrms
Ripple Rejection RR fo = 120Hz, 1V rms, II = 100mA 54 66 –dB
Long Term Stability S–32 –mV/1000Hr
Dropout Voltage VIN–VOIO = 1A –0.5 0.8 V
IO = 100mA –110 150 mA
Short Circuit Current ISC 1.6 1.9 –A
Maximum Line Transient VO ≤ 9V, RO = 100Ω, T ≤ 100ms 60 75 –V
Maximum Operational
Input Voltage 26 31 –Vdc
Reverse Polarity Input
Voltage DC RO = 100Ω–15 –30 –V
Reverse Polarity Input
Voltage Transient T ≤ 100ms, RO = 100Ω–50 –75 –V
.420 (10.67)
Max
.500
(12.7)
Max
.500
(12.7)
Min
.250 (6.35)
Max
.147
(3.75)
Dia
Max
GND
.100 (2.54)
VIN
GND
VOUT
.070 (1.78) Max
.110 (2.79)
