LM1185SF5 HTC Korea, LM1185SF5 Datasheet - Page 4

• Manufacturer Part Number: LM1185SF5
• Description: 150 mA C-MOS L.D.O. Regulator
• Manufacturer: HTC Korea

0702 Taejin Technology Co.,Ltd.
EQUATION 3-1:
150 mA C-MOS L.D.O. Regulator
EQUATION 3-2:
3.3 Layout Considerations :
The primary path of heat conduction out of the package is via the package leads. Therefore,layouts
having a ground plane,wide traces at the pads,and wide power supply bus lines combine to lower θ
and therefore increase the maximum allow able power dissipation limit.
The maximum allowable power dissipation (Equation
3-2) is a function of the maximum ambient
temperature(T
temperature(T
junction-to-air(θ
Equation 3-1 can be used in conjunction with
Equation 4-2 to ensure regulator thermal operation
is within limits.Forexample:
4
AMAX
JMAX
JA
).
) and the thermal resistance from
), the maximum allowable die
LM1185SF
HTC
JA