RT9193-15GF RICHTEK [Richtek Technology Corporation], RT9193-15GF Datasheet - Page 9

• Manufacturer Part Number: RT9193-15GF
• Description: 300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator
• Manufacturer: RICHTEK [Richtek Technology Corporation]

For recommended operating conditions specification of
RT9193, where T
temperature of the die (125°C) and T
ambient temperature. The junction to ambient thermal
resistance (θ
SOT-23-5 package is 250°C/W, SC-70-5 package is 333°C/
W, WDFN-6L 2x2 package is 165°C/W and MSOP-8
package is 160°C/W on standard JEDEC 51-3 thermal
test board. The maximum power dissipation at T
can be calculated by following formula :
P
P
SOT-23-5
P
P
The maximum power dissipation depends on operating
ambient temperature for fixed T
resistance θ
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.
DS9193-11 May 2008
D(MAX)
D(MAX)
D(MAX)
D(MAX)
700
600
500
400
300
200
100
= (125°C−25°C) / 165 = 606mW for WDFN-6L 2x2
= (125°C−25°C) / 333 = 300mW for SC-70-5
= (125°C−25°C) / 160 = 625mW for MSOP-8
= (125°C−25°C) / 250 = 400mW for TSOT-23-5/
0
Figure 2. Derating Curve for Packages
0
SC 70-5
MSOP-8
TSOT-23-5/
SOT-23-5
JA
JA
. For RT9193 packages, the Figure 2 of
is layout dependent) for TSOT-23-5/
25
Ambient Temperature (°C)
J(MAX)
WDFN-6L 2x2
50
is the maximum junction
J(MAX)
75
A
is the maximum
and thermal
100
A
= 25°C
125
RT9193
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