AMC8878/8879
TYPICAL APPLICATION
VIN
2.5V to 6V
VOUT
CIN
1µF
COUT
1µF
AMC8878
AMC8879
ON
OFF
CBP
0.01µF
ABSOLUTE MAXIMUM RATINGS (Note)
12V
Input Voltage, VIN
Operating Junction Temperature, TJ
Storage Temperature Range
Lead Temperature (soldering, 10 seconds)
Power Dissipation, PD @ TA = 70 OC
150OC
-65OC to +150OC
+260OC
150 mW
Note:
Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into,
negative out of the specified terminal.
THERMAL DATA
DB PACKAGE:
Thermal Resistance from Junction to Ambient, θJA
220OC /W
Junction Temperature Calculation: TJ = TA+ (PD × θJA).
The θJA 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:
TJ(MAX) – TA(MAX)
PD(MAX)
=
θJA
TJ(OC): Maximum recommended junction temperature
TA(OC): Ambient temperature of the application
θJA(OC /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 :
PD(MAX) = [(VIN(MAX) - VOUT(NOM))] × IOUT(NOM) + VIN(MAX) × IQ
Where: VOUT(NOM) = the nominal output voltage
IOUT(NOM) = the nominal output current, and
IQ = the quiescent current the regulator consumes at IOUT(MAX)
VIN(MAX) = the maximum input voltage
θJA = (+150OC – TA)/PD
Then
Copyright © 2006 ADDtek Corp.
2
DD067_G -- JUNE 2006
ADDTEK [ ADDTEK CORP ]
