Datasheet

UDG-09211
VTRK1
V
IN
R2
V
OUT1
R1
External
Tracking
Input
VTRK2
V
IN
R4
V
OUT2
R3
POL1
POL2
0
0.6
Voltage
V
TRK1
V
TRK2
V
OUT2
V
OUT1
t – Time
UDG-09212
TPS40170
www.ti.com SLUS970A –MARCH 2011–REVISED NOVEMBER 2013
In ratiometric voltage tracking shown in Figure 29, the two tracking voltages, VTRK1 and VTRK2, for two
modules, POL1 and POL2, are the same. Their output voltage, VOUT1 and VOUT2, are different with different
voltage divider R2/R1 and R4/R3. VOUT1 and VOUT2 increase proportionally and reach their output voltage set
points at about the same time.
Figure 29. Ratiometric Voltage Tracking Schematic Figure 30. Ratiometric Voltage Tracking Waveform
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