LM137K/883 National Semiconductor, LM137K/883 Datasheet - Page 5
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LM137K/883
Manufacturer Part Number
LM137K/883
Description
Standard Regulator Neg -1.2V to -37V 1.5A 3-Pin (2+Tab) TO-3 Tray
Manufacturer
National Semiconductor
Type
Linearr
Datasheet
1.LM337IMPNOPB.pdf
(12 pages)
Specifications of LM137K/883
Package
3TO-3
Function
Standard
Number Of Outputs
1
Input Voltage Range
-40 to -4.2 V
Output Voltage
-1.2 to -37 V
Maximum Output Current
1.5 A
Output Type
Adjustable
Operating Temperature
-55 to 150 °C
Polarity
Negative
Reference Voltage
-1.275 V
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM137K/883
Manufacturer:
Microsemi
Quantity:
1 400
Company:
Part Number:
LM137K/883B
Manufacturer:
NS
Quantity:
12
Company:
Part Number:
LM137K/883QS
Manufacturer:
RENESAS
Quantity:
49
Connection Diagrams
Application Hints
When a value for θ
a heatsink must be selected that has a value that is less than
or equal to this number.
HEATSINKING SOT-223 PACKAGE PARTS
The SOT-223 (“MP”) packages use a copper plane on the
PCB and the PCB itself as a heatsink. To optimize the heat
sinking ability of the plane and PCB, solder the tab of the
package to the plane.
Figures 3, 4 show the information for the SOT-223 package.
Figure 4 assumes a θ
51˚C/W for 2 ounce copper and a maximum junction tem-
perature of 125˚C.
FIGURE 3. θ
See NS Package Number T03B
(J−A)
Order Number LM337T
(H−A)
SOT-223 Package
vs Copper (2 ounce) Area for the
(J−A)
Plastic Package
is found using the equation shown,
Front View
of 75˚C/W for 1 ounce copper and
TO-220
(Continued)
00906707
00906732
5
Package Marked N02A See NS Package Number MP04A
Please see AN1028 for power enhancement techniques to
be used with the SOT-223 package.
FIGURE 4. Maximum Power Dissipation vs. T
Order Number LM337IMP
the SOT-223 Package
3-Lead SOT-223
Front View
00906734
00906733
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AMB
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