Datasheet

VIN
OFF ON
ON
OFF
VOUT
C
F
C
OUT
+
-
2.5V
Q1
Q2
Q3
Q4
VIN
OFF
ON
ON
OFF
VOUT
C
F
C
OUT
+
-
2.5V
VQ1
Q1
Q2
Q3
Q4
TPS60150
SLVS888B –DECEMBER 2008– REVISED FEBRUARY 2011 www.ti.com
Figure 22. Charging Mode
During the first half cycle, Q2 and Q3 transistors are turned on and flying capacitor, C
F
, will be charged to 2.5V
ideally.
Figure 23. Discharging Mode
During the second half cycle, Q1 and Q4 transistors are turned on. Capacitor C
F
will then be discharged to
output.
The output voltage can be calculated as follows:
Vout = V
IN
- VQ1 + V(C
F
) - VQ4 = VIN - VQ1 + 2.5V - VQ4 = 5 V. (Ideal)
The output voltage is regulated by output feedback and an internally compensated voltage control loop.
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