Datasheet

STMPS2141, STMPS2151, STMPS2161, STMPS2171 Ambient temperature
Doc ID 13793 Rev 6 11/37
4 Ambient temperature
In “Enable” operating mode, an amount of power is dissipated as heat in the power switch
due to the on-resistance. The power dissipation is: P = I
2
R.
Table 4. SOT23-5L (191 °C/W)
Part number Max. current
Max. R
ON
at 5 V
Power
dissipation
Temperature
difference
(junction - ambient)
Maximum ambient
temperature
(at junction
temperature 125 °C)
STMPS2141
0.50 A 135 mΩ 33.8 mW 6.5 118.5
STMPS2151
STMPS2161
1.00 A 135 mΩ 135.0 mW 25.8 99.2
STMPS2171
Table 5. MSOP8 (220 °C/W)
Part number Max. current
Max. R
ON
at 5 V
Power
dissipation
Temperature
difference
(junction - ambient)
Maximum ambient
temperature
(at junction
temperature 125 °C)
STMPS2141
0.50 A 140 mΩ 35.0 mW 7.7 117.3
STMPS2151
STMPS2161
1.00 A 140 mΩ 140.0 mW 30.8 94.2
STMPS2171
Table 6. SO-8 (160 °C/W)
Part number Max. current
Max. R
ON
at 5 V
Power
dissipation
Temperature
difference
(junction - ambient)
Maximum ambient
temperature
(at junction
temperature 125 °C)
STMPS2141
0.50 A 140 mΩ 35.0 mW 5.6 119.4
STMPS2151
STMPS2161
1.00 A 140 mΩ 140.0 mW 22.4 102.6
STMPS2171