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| TPS54060_10 Datasheet, PDF (20/49 Pages) Texas Instruments – 0.5A, 60V STEP DOWN SWIFT™ DC/DC CONVERTER WITH ECO-MODE™ | |||
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TPS54060
SLVS919A â JANUARY 2009 â REVISED JULY 2010
DETAILED DESCRIPTION (continued)
Vout2 + deltaV Vssoffset
R1 =
VREF
´ Iss
R2 =
VREF ´ R1
Vout2 + deltaV - VREF
deltaV = Vout1 - Vout2
R1 > 2800 ´ Vout1 - 180 ´ deltaV
EN
EN
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(7)
(8)
(9)
(10)
VOUT1
VOUT2
VOUT1
VOUT2
Figure 36. Ratio-metric Startup with Tracking
Resistors
Figure 37. Ratiometric Startup with Tracking
Resistors
EN
VOUT1
VOUT2
Figure 38. Simultaneous Startup With Tracking Resistor
20
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