RC1585T15 Fairchild Semiconductor, RC1585T15 Datasheet - Page 8

• Manufacturer Part Number: RC1585T15
• Description: IC REG LDO 1.5V 5A TO-220
• Manufacturer: Fairchild Semiconductor

Specifications of RC1585T15

• Applications: Converter, Pentium® II GTL+, Pro
• Voltage - Input: 3.3 ~ 7 V
• Number Of Outputs: 1
• Voltage - Output: 1.5V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-220-3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Assumptions:
The power dissipation in this application is:
P
From the specification table, for the power section:
T
For the control section:
T
60 + (10.7) * (5 + 0.7) = 121 C
In each case, the junction temperature is below the
maximum rating.
= 60 + (10.7) * (5 + 3) = 146 C
D
J
J
RC1585
SPECIFICATION
8
= T
= T
= (V
V
V
I
T
and a thermally conductive material)
OUT
A
in
OUT
Case-to-Ambient
A
A
= 60 C
IN
= 3.6V worst case
+ (P
+ (P
= 5A continuous
= 1.46V worst case
- V
D
D
OUT
) * (
) * (
Table 1. Bill of Materials for Application Circuit for the RC1585
) * (I
Item
C1
C2, C3
R1
R2
U1
V
V
= 5 C/W (assuming both a heatsink
IN
IN
Case-to-Ambient
Case-to-Ambient
= 3.3V
= 3.3V
OUT
) = (3.6-1.46) * (5) = 10.7W
Quantity
+
+
1
2
1
1
1
JC
JC
Figure 14. Application Circuit (RC1585)
)
) =
+
+
C1
10 F
Manufacturer
Fairchild
Generic
Generic
Xicon
Xicon
V
IN
RC1585
ADJ
U1
+
V
C2
100 F
Junction-to-case thermal resistance is specified
from the IC junction to the bottom of the case
directly below the die. This is the lowest resistance
path for heat flow. Proper mounting ensures the
best thermal flow from this area of the package to
the heat sink. Use of a thermally conductive
material at the case-to-heat sink interface is
recommended. Use a thermally conductive spacer
if the case of the device must be electrically
isolated and include its contribution to the total
thermal resistance. The cases of the RC1585 series
are directly connected to the output of the device.
OUT
Part Number
RC1585T
L10V100
L10V10
R1
124
R2
24.9
100 F, 10V Aluminum
10 F, 10V Aluminum
+ +
+
+
5A Regulator
Description
24.9 , 1%
C3
100 F
124 , 1%
PRODUCT
V
1.5V
OUT