Datasheet

LTC3866
31
3866fb
TYPICAL APPLICATIONS
I
L
10A/DIV
0A
V
OUT
100mV/DIV
AC-COUPLED
50µs/DIVV
IN
= 12V
V
OUT
= 1.5V
3866 F16
Figure 16. Load Step Transient Response
Figure 17. Very Low Output Voltage Ripple
Figure 18. Power Efficiency vs Load Current
5V/25A Step-Down Converter
V
OUT
LOW RIPPLE
FIGURE 15
10mV/DIV
AC-COUPLED
V
OUT
TYPICAL
FRONT PAGE
10mV/DIV
AC-COUPLED
2µs/DIV
3866 F17
V
IN
= 12V
V
OUT
= 1.5V
LOAD CURRENT (A)
0.01
0
EFFICIENCY (%)
10
30
40
50
100
70
0.1
1
3866 F18
20
80
90
60
10
100
V
IN
= 12V
V
OUT
= 1.5V
FREQ MODE/PLLIN
RUN PGOOD
TK/SS ITEMP
ITH
EXTV
CC
V
FB
V
IN
DIFFOUT
INTV
CC
DIFFP BOOST
DIFFN TG
SNSD
+
SW
SNS
–
BG
100µF
×2
330µF
×2
V
OUT
R1
3.48k
3866 TA04
R2
147k
20k
28.7k
R3
20k
V
OUT
5V
25A
4.7µF
CMDSH-3
BSC024NE2LS
BSC010NE2LS
1µF
120k
2.2Ω
C1
220nF
V
IN
12V
L1
1µH
DCR = 1.3mΩ
SNSA
+
PGND
ILIM CLKOUT
LTC3866
SGND
10µF
×2
180µF
×2
2.2nF
100pF
0.1µF