0

10

20

30

40

50

60

70

80

90

100

0.01

0.1

1

10

100

1k

10k

I

-OutputCurrent-mA

O

T =25°C

V

=1.8V

PWM/PFMMode

A

O

V =4.2V

I

V =2.5V

I

V =3.6V

I

V =5V

I

0

10

20

30

40

50

60

70

80

90

100

0.01

0.1

1

10

100

1k

10k

I

-OutputCurrent-mA

O

T =25°C

V

=1.2V

PWM/PFMMode

A

O

V =4.2V

I

V =2.5V

I

V =3.6V

I

V =5V

I

www.ti.com

List of Material

4.1

Test Results

The start-up waveform shown in Figure 3 specifies the required sequence.

Figure 3. Shows Sequencing in Start-Up Waveform

Figure 4. DCDC1: Efficiency vs Output Current

Figure 5. DCDC2: Efficiency vs Output Current

7

SLVA340A – June 2009 – Revised May 2010

High-Integration, High-Efficiency Power Solution Using DC/DC Converters With

DVFS

Copyright © 2009–2010, Texas Instruments Incorporated