FAN5350 Fairchild Semiconductor, FAN5350 Datasheet - Page 12

• Manufacturer Part Number: FAN5350
• Description: The FAN5350 is a step-down switching voltage regulator that delivers a fixed 1
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
FAN5350 Rev. 1.0.5
Typical Performance Characteristics
V
H scale: 10µs / div.
H scale: 20µs / div.
H scale: 1µs / div.
V
IN
Figure 26. Fast Load Transient DCM – CCM – DCM
Figure 31. Typical Waveforms in DCM, 50mA Load
IN
= 3.6V, T
Figure 28. Line Transient, 600mV, 50mA Load
= 3.6V
A
Figure 30. Combined Line (600mV) and Load (100mA to 350mA) Transient Response
= 25°C, V
EN
= V
IN
H scale: 5µs / div.
, according to the circuit in Figure 1 or Figure 2, unless otherwise specified.
I
I
LOAD
LOAD
V
V
OUT(ac)
= 350mA
OUT(ac)
= 100mA
V
OUT
I
LOAD
I
V
I
LOAD
V
L
, 20mV / div.
SW
, 20mV / div.
, 20mV / div.
SW
= 0.2A / div.
V
, 5V / div.
= 300mA
, 2V / div.
IN
= 20mA
= 3.0V
(Continued)
12
Figure 32. Typical Waveforms in CCM, 150mA Load
Figure 27. Slow Load Transient DCM – CCM – DCM
H scale: 10µs / div.
H scale: 2ms / div.
H scale: 200ns / div.
Figure 29. Line Transient, 600mV, 50mA Load
V
IN
V
= 3.0V
OUT(ac)
, 10mV / div.
V
V
IN
IN
= 3.6V
= 3.0V
V
V
OUT(ac)
OUT(ac)
V
I
LOAD
OUT
V
I
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V
L
, 20mV / div.
SW
, 20mV / div.
, 20mV / div.
, 0.5A / div.
SW
= 0.1A / div.
V
, 2V / div.
IN
, 2V / div.
= 3.6V