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TPS60110 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
TPS60110 REGULATED 5-V 300-mA LOW-NOISE CHARGE PUMP DC/DC CONVERTER TI
Texas Instruments TI
TPS60110 Datasheet PDF : 26 Pages
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TPS60110
REGULATED 5ĆV 300ĆmA LOWĆNOISE
CHARGE PUMP DC/DC CONVERTER
SLVS215C − JUNE 1999 − REVISED AUGUST 2008
APPLICATION INFORMATION
applications proposals
paralleling of two TPS60110 to deliver 600 mA
The TPS60110 can be paralleled to yield higher load currents. The circuit of Figure 28 can deliver 600 mA at
an output voltage of 5 V. It uses two TPS60110 devices in parallel. The devices can share the output capacitors,
but each one requires its own transfer capacitors and input capacitor. For best performance, the paralleled
devices should operate in the same mode (pulse-skip or constant frequency).
INPUT
2.7 V to
5.4 V 10 µF +
2.2 µF
OFF/ON
SKIP COM CLK
IN
OUT
IN
OUT
TPS60110 FB
C1+
C2+
C1−
C2−
ENABLE SYNC
PGND GND
+
15 µF
2.2 µF 2.2 µF
SKIP COM CLK
IN
OUT
IN
OUT
TPS60110 FB
C1+
C2+
C1−
C2−
ENABLE SYNC
PGND GND
OUTPUT
5V
300 mA
+
68 µF
2.2 µF
Figure 28. Paralleling of Two TPS60110
TPS60110 with LC output filter for ultra low ripple
For applications where extremely low output ripple is required, a small LC filter is recommended. This is shown
in Figure 29. The addition of a small inductor and filter capacitor will reduce the output ripple well below what
could be achieved with capacitors alone. The corner frequency of 500 kHz was chosen above the 300 kHz
switching frequency to avoid loop stability issues in case the feedback is taken from the output of the LC filter.
Leaving the feedback (FB) connection point before the LC filter, the filter capacitance value can be increased
to achieve even higher ripple attenuation without affecting stability margin.
INPUT
2.7 V to 5.4 V
CIN
15 µF
+
C1F
2.2 µF
SKIP COM CLK
IN
OUT
IN
OUT
TPS60110 FB
C1+
C2+
C1−
C2−
0.1 µH
+
+
1 µF
CO = 33 µF
OUTPUT
5 V 300 mA
C2F
2.2 µF
OFF/ON
ENABLE SYNC
PGND GND
Figure 29. TPS60110 With LC Filter for Ultra Low Output Ripple Applications
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
17
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