LP3965ES-1.8 National Semiconductor, LP3965ES-1.8 Datasheet - Page 16
![IC, LDO VOLT REG, 1.8V, 1.5A, TO-263-5](/photos/19/2/190204/4243352_sml.jpg)
LP3965ES-1.8
Manufacturer Part Number
LP3965ES-1.8
Description
IC, LDO VOLT REG, 1.8V, 1.5A, TO-263-5
Manufacturer
National Semiconductor
Datasheet
1.LP3965EMP-1.8.pdf
(22 pages)
Specifications of LP3965ES-1.8
Primary Input Voltage
7V
Output Voltage Fixed
1.8V
Dropout Voltage Vdo
380mV
No. Of Pins
5
Output Current
1.5A
Operating Temperature Range
-40°C To +125°C
Termination Type
SMD
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LP3965ES-1.8
Manufacturer:
NS/国半
Quantity:
20 000
www.national.com
Applications Information
HEATSINKING TO-263 AND SOT-223 PACKAGES
The TO-263 and SOT223 packages use the copper plane on
the PCB as a heatsink. The tab of these packages are
soldered to the copper plane for heat sinking. Figure 3
shows a curve for the θ
copper area sizes, using a typical PCB with 1 ounce copper
and no solder mask over the copper area for heat sinking.
As shown in the figure, increasing the copper area beyond 1
square inch produces very little improvement. The minimum
value for θ
32˚C/W.
Figure 4 shows the maximum allowable power dissipation
for TO-263 packages for different ambient temperatures,
assuming θ
ture is 125˚C.
Figure 5 shows a curve for the θ
different copper area sizes, using a typical PCB with 1 ounce
copper and no solder mask over the copper area for heat
sinking.
FIGURE 3. θ
FIGURE 4. Maximum power dissipation vs ambient
JA
JA
temperature for TO-263 package
for the TO-263 packag mounted to a PCB is
is 35˚C/W and the maximum junction tempera-
JA
vs Copper(1 Ounce) Area for TO-263
JA
package
of TO-263 package for different
JA
of SOT-223 package for
(Continued)
10126632
10126633
16
The following figures show different layout scenarios for
SOT-223 package.
FIGURE 5. θ
FIGURE 6. SCENARIO A, θ
FIGURE 7. SCENARIO B, θ
JA
vs Copper(1 Ounce) Area for SOT-223
package
JA
JA
= 148˚C/W
= 125˚C/W
10126619
10126621
10126620