Datasheet

SWCS037-018
VDD1EFFICIENCY vsOUTPUT CURRENT
Outputvoltage=1.3V,Vbat=3.6V
90
80
70
60
50
40
30
20
10
00
0.0001 0.001 0.01 0.1 1
ILOAD(A)
Effciency(%)
TPS65930/TPS65920
SWCS037G–MAY 2008– REVISED APRIL 2011 www.ti.com
Table 4-3. VDD1 dc-dc Regulator Characteristics (continued)
Parameter Comments Min Typ Max Unit
Value 8 10 12 μF
External capacitor
(5)
Equivalent series resistance (ESR) at 0 20 mΩ
switching frequency
(5) Under current load condition step:
Imax/2 (550 mA) in 100 ns with a ±20% external capacitor accuracy or
Imax/3 (367 mA) in 100 ns with a ±50% external capacitor accuracy
See Table 2-2 for how to connect the VDD1/2 dc-dc converter when it is not in use.
Figure 4-2 shows the efficiency of the VDD1 dc-dc regulator in active mode and sleep mode.
Figure 4-2. VDD1 dc-dc Regulator Efficiency
4.1.1.2 External Components and Application Schematics
Figure 4-3 is an application schematic with the external components on the VDD1 dc-dc regulator.
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