Texas Instruments 3A Fast Response Ultra Low Dropout Linear Regulator LP38513S-1.8EV LP38513S-1.8EV 데이터 시트
제품 코드
LP38513S-1.8EV
TAB
IS
GND
OUT
GND
EN 1
2
3
4
5
IN
L
P3
8
8
5
1
3
S-1
.8
ERROR
Power Dissipation
6
Power Dissipation
The TO-263 package alone has a junction to ambient thermal resistance (
θ
JA
) rating of 60°C/W. When
mounted on the LP38513S evaluation board the
θ
JA
rating is approximately 30°C/W.
Although there is only approximately 0.28 square inches of 1 ounce copper area immediately under the
tab, the top copper surface area is extended to an additional copper area, 1 square inch of 1 ounce
copper, on the bottom of the board by the use of nine thermal vias.
tab, the top copper surface area is extended to an additional copper area, 1 square inch of 1 ounce
copper, on the bottom of the board by the use of nine thermal vias.
With the 30°C/W thermal rating the LP38513S-1.8 evaluation board will deliver the rated 3A output current
if V
if V
IN
= 2.5V, V
OUT
= 1.8V, and T
A
≤
25°C.
Figure 5. Maximum Power Dissipation vs. Ambient Temperature
7
Connection Diagram
4
AN-1518 LP38513S-1.8 Evaluation Board
SNVA182A – August 2007 – Revised April 2013
Copyright © 2007–2013, Texas Instruments Incorporated