AMC8878/8879
TYPICAL APPLICATION
V
IN
2.5V to 6V
V
OUT
C
IN
1µF
AMC8878
AMC8879
C
OUT
1µF
ON
OFF
C
BP
0.01µF
ABSOLUTE MAXIMUM RATINGS
Input Voltage, V
IN
Operating Junction Temperature, T
J
Storage Temperature Range
Lead Temperature (soldering, 10 seconds)
Power Dissipation, P
D
@ T
A
= 70
O
C
Note:
Exceeding these ratings could cause damage to the device.
negative out of the specified terminal.
(Note)
12V
150
O
C
-65
O
C to +150
O
C
+260
O
C
150 mW
All voltages are with respect to Ground. Currents are positive into,
THERMAL DATA
DB PACKAGE:
Thermal Resistance from Junction to Ambient,
θ
JA
Junction Temperature Calculation: T
J
= T
A
+ (P
D
×
θ
JA
).
The
θ
JA
numbers are guidelines for the thermal performance of the device/pc-board system.
Connect the ground pin to ground using a large pad or ground plane for better heat dissipation.
All of the above assume no ambient airflow.
Maximum Power Calculation:
– T
A(MAX)
T
P
D(MAX)
=
J(MAX)
θ
JA
O
T
J
( C): Maximum recommended junction temperature
T
A
(
O
C): Ambient temperature of the application
θ
JA
(
O
C /W): Junction-to-junction temperature thermal resistance of the package, and other heat dissipating
materials.
The maximum power dissipation for a single-output regulator is
:
P
D(MAX)
=
[(V
IN(MAX)
- V
OUT(NOM)
)]
×
I
OUT(NOM)
+ V
IN(MAX)
×
I
Q
Where: V
OUT(NOM)
= the nominal output voltage
I
OUT(NOM)
= the nominal output current, and
I
Q
= the quiescent current the regulator consumes at I
OUT(MAX)
V
IN(MAX)
= the maximum input voltage
Then
θ
JA
= (+150
O
C – T
A
)/P
D
220
O
C /W
Copyright
©
2006 ADDtek Corp.
2
DD067_G --
JUNE 2006
ADDTEK [ ADDTEK CORP ]
