APL1084
Electrical Characteristics (Cont.)
Symbol
V
N
θ
th,J-TAB
θ
th,J-AMB
Parameter
Test Conditions
APL1084
Min.
Typ.
Max.
0.003
6.0
50
62.5
Unit
%
°C/
W
°C/
W
RMS Output Noise(% of T
J
=25°C,10Hz≤F≤10kHz
V
OUT
)
Thermal Resistance
(NOTE 2)
Junction-to-Case, at TAB
Thermal Resistance
TO-263
Junction-to-Ambient
TO-252
NOTE 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulations are
measured at a constant junction temperature by low duty cycle pulse testing.
NOTE 2 :The value could be varied when heat sink size is different. Use larger heat sink or larger PCB size , which improves
θ
th
,TAB-A
, to improve overall thermal resistance (θ
th
,J-A
).
Application Circuits
Typical Regulator
V
IN
(2.75V~7V)
10µ
F +
C
1
APL1084
+
V
OUT
(1.250V/ 5A)
Solid Tantalum
C
2*
5V to 3.3V Regulator
V
IN
(5V)
10µ
F
C
1
+
APL1084
R1
R2
+
V
OUT
(3.3V/ 5A)
Solid Tantalum
C
2*
V
OUT
=(R1+R2)/R1*1.250V
* Required for stability
APL
1084
:C =10µF
* R1 is typically in range of 100Ω to 120Ω
Copyright
ANPEC Electronics Corp.
Rev. B.9 - Aug., 2003
3
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
