SLVA343A Datasheet, PDF (7/8 Pages) Texas Instruments – Medium Integrated Power Solution Using a Dual DC/DC Converter and an LDO

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4.1 Test Result
The start-up waveform (Figure 3) specifies the sequencing order that is required.
Bill of Materials
Figure 3. Sequencing in Start-up Waveform
100
V_OUT2 = 1.8 V
90
100
90 ^{VOUT1 = 1.1 V}
80
80
70
V_IN = 2.7 V
V_IN = 2.7 V
70
60
V_IN = 3.6 V
V_IN = 3.6 V
60
V_IN = 5 V
V_IN = 2.7 V
V_IN = 3.6 V
V_IN = 2.7 V
V_IN = 3.6 V
50
V_IN = 5 V
50
V_IN = 5 V
V_IN = 5 V
40
40
30
20
10
0
0.01
Power Save Mode
MODE/DATA = 0
Forced PWM Mode
MODE/DATA = 1
0.1
1
10
100
1000
I_OUT - mA
Figure 4. Efficiency V_OUT2 = 1.8 V
30
20
10
0
0.01
Power Save Mode
MODE/DATA = 0
Forced PWM Mode
MODE/DATA = 1
0.1
1
10
100
1000
I_OUT - mA
Figure 5. Efficiency V_OUT1 = 1.1 V
SLVA343A – June 2009 – Revised May 2010
Medium Integrated Power Solution Using a Dual DC/DC Converter and an LDO
7
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