7241

NTE7241
Integrated Circuit,
Adjustable Positive 3 Terminal High Voltage Regulator,
1.25V to 125V
TO−220 Type Package
Description:
The NTE7241 is an adjustable 3−terminal high−voltage with an output range of 1.2V to 125V and a DMOS
output transistor capable of sourcing more than 700 mA. It is designed for use in high−voltage applications
where standard bipolar regulators cannot be used. Excellent performance specifications, superior to
those of most bipolar regulators, are achieved through circuit design and advanced layout techniques.
As a state−of−the−art regulator, the NTE7241 combines standard bipolar circuitry with high−voltage
double−diffused MOS transistors on one chip to yield a device capable of withstanding voltages for
higher than standard bipolar integrated circuits. Because of its lack of secondary−breakdown and
thermal−runaway characteristics usually associated with bipolar outputs, the NTE7241 maintains full
overload protection while operating at up to 125V from input to output. Other features of the device
include current limiting, safe−operating−area (SOA) protection, and thermal shutdown. Even if ADJ
is inadvertently disconnected, the protection circuitry remains functional.
The NTE7241 is characterized for operation over the virtual junction temperature range of 0° to +125°C.
Features:
D Output Adjustable From 1.25V to 125V When Used With an External Resistor Divider
D 700−mA Output Current
D Full Short−Circuit, Safe−Operating−Area, and Thermal−Shutdown Protection
D 0.001%/V Typical Input Voltage Regulation
D 0.15% Typical Output Voltage Regulation
D 76−dB Typical Ripple Rejection
Absolute Maximum Ratings: (Note 1, unless otherwise specified)
Input/Output Voltage Differential, VI − VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125V
Operating Free−Air Temperature, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C
Operating Case Temperature, TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C
Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to +150C
Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. Theses are stress ratings only, and functional operation of the device
at these or any other conditions beyond those indicated under “Recommended Operating
Conditions” is not implied. Exposure to absolute−maximum−rated conditions for extended
periods may affect reliability.
Absolute Maximum Ratings (Cont’d): (Note 1, unless otherwise specified)
Thermal Resistance, Junction−to−Case (Note 2), RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17C/W
Thermal Resistance, Junction−to−Ambient (Note 2), RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . 19C/W
Lead Temperature 1.6mm (1/16 inch) from case for 10 seconds, TL . . . . . . . . . . . . . . . . . . . . +260C
Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. Theses are stress ratings only, and functional operation of the device
at these or any other conditions beyond those indicated under “Recommended Operating
Conditions” is not implied. Exposure to absolute−maximum−rated conditions for extended
periods may affect reliability.
Note 2. Maximum power dissipation is a function of TJ(max), RthJA, and TA. The maximum allowable
power dissipation at any allowable ambient temperature is PD = (TJ(max) − TA/RthJA). Operating
at the absolute maximum TJ of +150C can affect reliability. Due to variations in individual device
electrical characteristics and thermal resistance, the built−in thermal overload protection may be
activated at power levels slightly above or below the rated dissipation.
Recommended Operating Conditions:
Parameter
Symbol
Input−to Output Voltage Differential
Output Current
Operating Virtual Junction Temperature
Electrical Characteristics:
Parameter
Test Conditions
Typ
Max
Unit
−
15
0
−
−
−
125
700
125
V
mA
°C
Min
Typ
Max
Unit
−
−
66
−
−
−
−
−
0.001
0.004
76
7.5
0.15%
20
0.3
0.4%
0.01
0.02
−
25
0.5%
70
1.0
−
%/V
%/V
dB
mV
1000 hours at TJ = +125C, VI − VO = 125V
−
0.2%
−
−
f = 10Hz to 10kHz, TJ = +25C
VI − VO = 125V
−
−
0.003%
−
−
15
−
mA
−
−
700
100
−
−
1100
715
900
250
83
0.5
−
−
−
−
110
5
mA
mA
mA
mA
A
A
1.2
1.27
1.3
V
VI − VO = 20V to 125V,
P  Rated Dissipation, (Note 4)
Ripple Rejection
Output Voltage Regulation
DVI(PP) = 10V, VO = 10V, f = 120Hz
IO = 15 mA to 700 mA, Tj = +25C
IO = 15 mA to 700 mA,
P  Rated Dissipation
ADJ Input Current
Change in ADJ
Input Current
Reference Voltage
(OUT to ADJ)
Min
(VI − VO = 25V, IO = 0.5A, TJ = 0 to +125C 10mA, Note 3, unless
otherwise specified)
Input Voltage Regulation
Output Voltage Change
with Temperature
Output Voltage
Long−Term Drift
Output Noise Voltage
Minimum Output Current
to Maintain Regulation
Peak Output Current
Test Conditions
VI − VO
IO
TJ
TJ = +25C
TJ = 0C to +125C
VO  5V
VO  5V
VO  5V
VO  5V
VI − VO = 25V, t =1ms
VI − VO = 15V, t = 30ms
VI − VO = 25V, t = 30ms
VI − VO = 125V, t = 30ms
VI − VO = 15V to 125V, IO = 15mA to 700mA,
P  Rated Dissipation
VI − VO = 10V to 125V, IO = 15mA to 700mA,
P  Rated Dissipation, Note 5
mV
%
−
Note 3. Pulse−testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately.
Note 4. Input voltage regulation is expressed here as the percentage change in output voltage per 1−V
change at the input.
Note 5. Due to the dropout voltage and output current−limiting characteristics of this device, output current is limited to less than 700 mA at input−to−output voltage differentials of less than 25V.
.420 (10.67)
Max
.110 (2.79)
.147 (3.75)
Dia Typ
.500
(12.7)
Max
.154 (3.9)
Max
.500
(12.7)
Min
.070 (1.78) Max
Adjust
.100 (2.54)
VIN
VOUT/Tab