DDR Termination Regulator
TJ2997
sinking and sourcing current. Although only one equation will add into the total,
sink current simultaneously.
V
cannot source and
TT
P
= V
x I
(Sinking) or
P
= ( V
- V
) x I
(Sourcing)
LOAD
VTT
VTT
LOAD
VTT
PVIN
VTT
The power dissipation of the TJ2997 can also be calculated during the shutdown state. During this
condition the output V will tri-state, therefore that term in the power equation will disappear as it
TT
cannot sink or source any current (leakage is negligible). The only losses during shutdown will be
the reduced quiescent current at AVIN and the constant impedance that is seen at the VDDQ pin.
P = P
+ P
VDDQ
,
D
AVIN
P
= I
x V
AVIN AVIN
Where,
AVIN
P
= V
x I
= V
x R
VDDQ
VDDQ
VDDQ
VDDQ
VDDQ2
Apr, 2011 - R1.0.1
8/13
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
