Datasheet

5 Ps/DIV
2V/DIV
2V/DIV
50
mv/DIV
500
mA/DIV
SW2
SW1
V
OUT_AC
LOAD
LM3668
www.ti.com SNVS449M –JUNE 2007–REVISED MAY 2013
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Typical Application Circuit (Figure 1): V
IN
= 3.6V, L = 2.2 µH, C
IN
= 10 µF, C
OUT
= 22 µF
(1)
, T
A
= 25°C , unless otherwise
stated.
Load Transient in Buck-Boost Mode Load Transient in Buck Mode
(Auto Mode) (Forced PWM Mode)
V
IN
= 3.6V, V
OUT
= 3.3V, Load = 50-150mA V
IN
= 5.5V, V
OUT
= 5.0V, Load = 0-500mA
Figure 33. Figure 34.
Load Transient in Boost Mode Typical Switching Waveform in Boost Mode
(Forced PWM Mode) (PWM Mode)
V
IN
= 3.5V, V
OUT
= 5.0V, Load = 0-500mA V
IN
= 2.7V, V
OUT
= 3.0V, Load = 500mA
Figure 35. Figure 36.
Typical Switching Waveform in Buck Mode Typical Switching Waveformt in Boost Mode
(PWM Mode) (PFM Mode)
V
IN
= 3.6V, V
OUT
= 3.0V, Load = 500mA V
IN
= 2.7V, V
OUT
= 3.0V, Load = 50mA
Figure 37. Figure 38.
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