LTC3416 Linear Technology, LTC3416 Datasheet - Page 13

• Manufacturer Part Number: LTC3416
• Description: 4A/ 4MHz/ Monolithic Synchronous Step-Down Regulator
• Manufacturer: Linear Technology

APPLICATIO S I FOR ATIO
Decoupling the PV
tors on both switching regulators is adequate for most
applications.
The resitor values for the voltage divider on V
calculated by using the following equation:
1 8
.
V
0 8
.
V
1
IN
U
3.3V
V
and SV
R
R
IN
2
1
PGOOD
PGOOD
U
3.3V
V
IN
C
100 F
2
IN
IN2
pins with two 100 F capaci-
**
Figure 6. 1.8V and 2.5V, 4A Voltage Tracking Regulators at 1MHz
W
C
100 F
2
R
R
IN1
R
R
100k
294k
100k
294k
OSC2
OSC1
PG2
PG1
**
14
16
17
10
14
16
17
10
7
4
3
2
5
1
7
4
3
2
5
1
OUT1
PV
PV
SV
RUN
PGOOD
TRACK
R
SGND
PGND
PGND
PV
PV
SV
RUN
PGOOD
TRACK
R
SGND
PGND
PGND
U
T
T
IN
IN
IN
IN
IN
IN
LTC3416
LTC3416
can be
PGND
PGND
PGND
PGND
V
V
SW
SW
SW
SW
SW
SW
SW
SW
I
I
NC
NC
NC
NC
TH
TH
FB
FB
8
9
12
13
19
6
15
18
20
11
8
9
12
13
19
6
15
18
20
11
Setting R1 to 200k results in a value of 255k for R2. To
calculate the resistor values for the voltage divider on
V
Setting R3 to 205k gives the following results: R4 = 78.7k
and R5 = 357k. Figure 6 shows the complete schematic for
this design example.
OUT2
0.47 H
0.47 H
R
2 5
L2*
L1*
.
4
, we can use the following equations:
V
R
5.9k
R
5.9k
ITH2
ITH1
C
22pF
X7R
C
680pF
X7R
C
22pF
X7R
C
680pF
X7R
3416 F06
R
FF2
ITH2
FF1
ITH1
3
0 8
.
2 5
1 8
R5
357k
R4
78.7k
R3
205k
R2
255k
R1
200k
.
.
V
C
22pF
X7R
C
22pF
X7R
C2
C1
**
V
V
*
1
TOKO FDVO630-R47M
TDK C4532X5R0J107M
–
1
R
4
R
C
100 F
2
C
100 F
2
3
OUT2
OUT1
R
5
**
**
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V
2.5V
4A
V
1.8V
4A
OUT2
OUT1
LTC3416
13
3416f