Datasheet

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DISSIPATION RATINGS
RECOMMENDED OPERATING CONDITIONS
TPS70845, TPS70848
TPS70851, TPS70858
TPS70802
SLVS301D – JUNE 2000 – REVISED DECEMBER 2007
DERATING
PACKAGE AIR FLOW (CFM) T
A
≤ +25 ° C T
A
= +70 ° C T
A
= +85 ° C
FACTOR
0 3.067 W 30.67 mW/ ° C 1.687 W 1.227 W
PWP
(1)
250 4.115 W 41.15 mW/ ° C 2.265 W 1.646 W
(1) This parameter is measured with the recommended copper heat sink pattern on a 4-layer PCB, 1 oz. copper on a 4-in by 4-in ground
layer. Simultaneous and continuous operation of both regulator outputs at full load may exceed the power dissipation rating of the PWP
package. For more information, refer to TI technical brief SLMA002 .
Over operating temperature range (unless otherwise noted).
MIN MAX UNIT
Input voltage, V
I
(1)
(regulator 1 and 2) 2.7 6 V
Output current, I
O
(regulator 1) 0 500 mA
Output current, I
O
(regulator 2) 0 250 mA
Output voltage range (for adjustable option) 1.22 5.5 V
Operating virtual junction temperature, T
J
– 40 +125 ° C
(1) To calculate the minimum input voltage for maximum output current, use the following equation: V
I(min)
= V
O(max)
+ V
DO(max load)
.
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