TPS73HD301_15 Datasheet, PDF (19/36 Pages) Texas Instruments – DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

TPS73HD301, TPS73HD318, TPS73HD325
DUALĆOUTPUT LOWĆDROPOUT VOLTAGE REGULATORS
SLVS167C − SEPTEMBER 1998 − REVISED − MAY 1999
TYPICAL CHARACTERISTICS
RESET DELAY TIME
vs
FREE-AIR TEMPERATURE
197
196
195
194
193
192
191
190
−50 −25 0 25 50 75 100 125
TA − Free-Air Temperature −°C
Figure 31
DISTRIBUTION FOR RESET DELAY
50
45
TA = 25°C
197 Devices
40
35
30
25
20
15
10
5
0
180 185 190 195 200 205 210
td − Reset Delay Time − ms
Figure 32
THERMAL INFORMATION
The TPS73HD3xx is packaged in a high-power dissipation downset lead frame for optimal power handling. with
proper heat dissipation techniques, the full power soutput of these devices can be safely handled over the full
temperture range. The Texas Instruments technical brief, PowerPAD Thermally Enhanced Package (literature
number SLMA002), goes into considerable detail into techniques for properly mounting this type of package for
maximum thermal performance. A thermal conduction plane of approximately 3I y 3I will give a power dissipatio level
of 4.5 W.
Power dissipation within the device can be calculated with the following equation:
ǒ Ǔ ǒ Ǔ _{PD + PIN–POUT + VI IO1 ) IO2 – VO1 IO1 ) VO2 IO2}
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