SLVA341A Datasheet, PDF (7/9 Pages) Texas Instruments – High-Efficiency Power Solution Using DC/DC Converter With DVFS

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4.1 Test Result
The start-up waveform is shown in Figure 3, which specifies the sequencing order that is required.
Figure 3. Sequencing in Start-Up Waveform
100
90 ^VIN ^{= 2.3 V}
100
90 ^LPFM/PWM
80
80
70
V_IN = 2.7 V
60
V_IN = 3.6 V
50
V_IN = 4.2 V
40
V_IN = 5 V
30
MODE = GND,
20
V_OUT = 1.2 V,
L = 2.2 mH MIPSZ2012 2R2 (2012 size),
10
C_OUT = 4.7 mF
0
0.1
1
10
100
I_O - Output Current - mA
Figure 4. Efficiency vs Output Current
1000
70
60
50
FPFM/PWM
40
3-MHz PWM
30
V_I = 3.6 V
20
V_O = 1.35 V
10
L = 1 mH
C_O = 10 mF
0
0.1
1
10
100
1000
I_O − Output Current − mA
Figure 5. Efficiency vs Output Current
SLVA341A – June 2009 – Revised May 2010
High-Efficiency Power Solution Using DC/DC Converter With DVFS
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