LM3668 datasheet(9/30 Pages) TI

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100 2s/DIV

5V/DIV

500

mA/DIV

SW2

SW1

VOUT_AC

LOAD

200

mv/DIV

100 2s/DIV

5V/DIV

200 mV/DIV

500 mA/DIV

SW2

SW1

VOUT_AC

LOAD

4.0V

3.4V

VIN

VOUT_AC

SW2

SW1

100 mV/DIV

5V/DIV

100 2s/DIV

3.4V

2.8V

100 mV/DIV

5V/DIV

100 2s/DIV

VIN

VOUT_AC

SW2

SW1

LM3668

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SNVS449O – JUNE 2007 – REVISED APRIL 2015

Typical Characteristics (continued)

Typical Application Circuit (see Figure 46): VIN = 3.6 V, L = 2.2 µH, CIN = 10 µF, COUT = 22 µF

(4), T

A = 25°C , unless otherwise

stated.

Figure 19. Line Transient in Boost Mode (VOUT = 3.4 V, Load

Figure 20. Line Transient in Buck-Boost Mode (VOUT = 3.4 V,

= 500 mA)

Load = 500 mA)

Figure 22. Load Transient in Boost Operation (Forced PWM

Figure 21. Load Transient in Buck Mode (Forced PWM

Mode) VIN = 2.7 V, VOUT = 3.4 V, Load = 0 to 500 mA

Mode) VIN = 4.2 V, VOUT = 3.4 V, Load = 0 to 500 mA

Figure 23. Load Transient in Buck-Boost Operation (Forced

Figure 24. Load Transient in Buck Mode (Forced PWM

PWM Mode) VIN = 3.44 V, VOUT = 3.4 V, Load = 0 to 500 mA

Mode) VIN = 4.2 V, VOUT = 3 V, Load = 0 to 500 mA

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