NSC LM133KSTEEL Datasheet
LM133/LM333
3-Ampere Adjustable Negative Regulators
General Description
The LM133/LM333 are adjustable 3-terminal negative voltage regulatorscapable of supplying in excess of −3.0A over
an output voltage range of −1.2V to −32V. These regulators
are exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for
frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients.
Further, the LM133 series features internal current limiting,
thermal shutdown and safe-area compensation, making
them substantially immune to failure from overloads.
The LM133/LM333 serve a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM133/
LM333 are ideal complements to the LM150/LM350
adjustable positive regulators.
Features
n Output voltage adjustable from −1.2V to −32V
n 3.0A output current guaranteed, −55˚C to +150˚C
n Line regulation typically 0.01%/V
n Load regulation typically 0.2
%
n Excellent rejection of thermal transients
n 50 ppm/˚C temperature coefficient
n Temperature-independent current limit
n Internal thermal overload protection
n P
+
Product Enhancement tested
n Standard 3-lead transistor package
n Output is short circuit protected
Connection Diagrams
TO-3
Metal Can Package
DS009065-1
Bottom View
Steel TO-3 Metal Can Package (K STEEL)
Order Number LM133K STEEL or
LM333K STEEL
See NS Package Number K02A
TO-220
Plastic Package
DS009065-2
Front View
3-Lead TO-220 Plastic Package (T)
Order Number LM333T
See NS Package Number T03B
May 1998
LM133/LM333 3-Ampere Adjustable Negative Regulators
© 1999 National Semiconductor Corporation DS009065 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the NationalSemiconductor Sales Office/
Distributors for availability and specifications.
Power Dissipation Internally Limited
Input-Output Voltage Differential 35V
Operating Junction Temperature Range
LM133
LM333
T
MIN
to T
MAX
−55˚C to +150˚C
−40˚C to +125˚C
Storage Temperature −65˚C to +150˚C
Lead Temperature (Soldering, 10 sec.)
TO-3 Package 300˚C
TO-220 Package 260˚C
ESD Susceptibility TBD
Electrical Characteristics LM133
Specifications with standard typeface are for T
J
=
25˚C, and those with boldface type apply over the full operating temperature
range. (Note 3)
Parameter Conditions Typical Min Max Units
(Note 2) (Note 2)
Reference Voltage I
L
=
10 mA −1.250 −1.238 −1.262 V
3V ≤ |V
IN−VOUT
| ≤ 35V −1.250 −1.225 −1.275 V
10 mA ≤ I
L
≤ 3A, P ≤ P
MAX
Line Regulation 3V ≤ |VIN−V
OUT
| ≤ 35V 0.01 0.02
%
/V
I
OUT
=
50 mA (Note 4) 0.02 0.05
Load Regulation 10 mA ≤ I
OUT
≤ 3A, P ≤ P
MAX
0.2 0.5
%
(Notes 4, 5) 0.4 1.0
Thermal Regulation 10 ms Pulse 0.002 0.01
%
/W
Temperature Stability T
MIN
≤ TJ≤ T
MAX
0.4
%
Long Term Stability T
J
=
125˚C, 1000 Hours 0.15
%
Adjust Pin Current 65 90 µA
70 100
Adjust Pin Current 10 mA ≤ I
L
≤ 3A 2 6 µA
Change 3.0V ≤ |V
IN−VOUT
| ≤ 35V
Minimum Load |V
IN−VOUT
| ≤ 35V 2.5 5.0 mA
Current |V
IN−VOUT
| ≤ 10V 1.2 2.5
Current Limit 3V ≤ |V
IN−VOUT
| ≤ 10V 3.9 3.0
(Note 5) |V
IN−VOUT
|=20V 2.4 1.25 A
|V
IN−VOUT
|=30V 0.4 0.3
Output Noise 10 Hz to 10 kHz 0.003
%
(rms)
(%of V
OUT
)
Ripple Rejection V
OUT
=
10V, f=120 Hz dB
C
ADJ
=
0µF 60
C
ADJ
=
10 µF 77
Thermal Resistance TO-3 Package (K STEEL) 1.2 1.8 ˚C/W
Junction-to-Case
Thermal Shutdown 163 150 190 ˚C
Temperature
Electrical Characteristics LM333
Specifications with standard typeface are for T
J
=
25˚C, and those with boldface type apply over the full operating temperature
range. (Note 3)
Parameter Conditions Typical Min Max Units
(Note 2) (Note 2)
Reference Voltage I
L
=
10 mA −1.250 −1.225 −1.275 V
3V ≤ |V
IN−VOUT
| ≤ 35V −1.250 −1.213 −1.287
10 mA ≤ I
L
≤ 3A, P ≤ P
MAX
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Electrical Characteristics LM333 (Continued)
Specifications with standard typeface are for T
J
=
25˚C, and those with boldface type apply over the full operating temperature
range. (Note 3)
Parameter Conditions Typical Min Max Units
(Note 2) (Note 2)
Line Regulation 3V ≤ |V
IN−VOUT
| ≤ 35V 0.01 0.04
%
/V
I
OUT
=
50 mA (Note 4) 0.02 0.07
Load Regulation 10 mA ≤ I
L
≤ 3A, P ≤ P
MAX
0.2 1.0
%
(Notes 4, 5) 0.4 1.5
Thermal Regulation 10 ms Pulse 0.002 0.02
%
/W
Temperature Stability T
MIN
≤ TJ≤ T
MAX
0.5
%
Long Term Stability T
J
=
125˚C, 1000 Hours 0.2
%
Adjust Pin Current 65 95 µA
70 100
Adjust Pin Current 10 mA ≤ I
L
≤ 3A 2.5 8 µA
Change 3.0V ≤ |V
IN−VOUT
| ≤ 35V
Minimum Load |V
IN−VOUT
| ≤ 35V 2.5 10 mA
Current |V
IN−VOUT
| ≤ 10V 1.5 5.0
Current Limit 3V ≤ |V
IN−VOUT
| ≤ 10V 3.9 3.0
(Note 5) |V
IN−VOUT
|=20V 2.4 1.0 A
|V
IN−VOUT
|=30V 0.4 0.20
Output Noise 10 Hz to 10 kHz 0.003
%
(rms)
(%of V
OUT
)
Ripple Rejection V
OUT
=
10V, f=120 Hz
C
ADJ
=
0µF 60 dB
C
ADJ
=
10 µF 77
Thermal Resistance TO-3 Package (K STEEL) 1.2 1.8 ˚C/W
Junction to Case TO-220 Package (T) 3 4
Thermal Shutdown 163 ˚C
Temperature
Thermal Resistance K Package 35
Junction to Ambient T Package 50 ˚C/W
(No Heatsink)
Note 1: Absolute MaximumRatings indicate limits beyond which damageto the device may occur. Electrical specificationsdo not apply when operating thedevice
outside of its stated operating conditions.
Note 2: All limitsare guaranteed at either room temperature (standard type face) or attemperature extremes (bold typeface) byproduction testing or correlation
techniques using standard Statistical Quality Control (SQC) methods.
Note 3: Unless otherwise specified: |V
IN−VOUT
|=5V, I
OUT
=
0.5A, P
DISS
≤ 30W.
Note 4: Load andline regulation are measured at constant junction temperature, usinglow duty cycle pulse testing (output voltage changes dueto heating effects
are covered by the Thermal Regulation specification). For theTO-3 package, load regulation is measured on the output pin,
1
⁄8" below the base of the package.
Note 5: The output current of the LM333 is guaranteed to be ≥ 3A in the range 3V ≤ |V
IN−VOUT
| ≤ 10V. For the range 10V ≤ |VIN−V
OUT
| ≤ 15V, the guaranteed
minimum output current is equal to: 30/ (V
IN−VOUT
). Refer to graphs for guaranteed output currents at other voltages.
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