ltc3406ab Linear Technology Corporation, ltc3406ab Datasheet - Page 13

• Manufacturer Part Number: ltc3406ab
• Description: 1.5mhz, 600ma Synchronous Step-down Regulator In Thinsot
• Manufacturer: Linear Technology Corporation

For the feedback resistors, choose R1 = 316k. R2 can
then be calculated from Equation (2) to be:
APPLICATIONS INFORMATION
V
IN
R
2
=
C
4.7μF
CER
⎛
⎝ ⎜
200mV/DIV
500mA/DIV
IN
500mA/DIV
†
V
0 6
OUT
.
I
V
LOAD
OUT
4
1
I
L
−
V
RUN
V
V
I
LTC3406AB
IN
LOAD
IN
OUT
1 1 1000
⎞
⎠ ⎟
GND
= 3.6V
R
= 2.5V
= 200mA TO 450mA
2
SW
V
=
FB
Load Step
3
5
20μs/DIV
316k
2.2μH*
3406AB TA09a
k
22pF
1M
** TAIYO YUDEN JHK316BJ106ML
*MURATA LQH32CN2R2M33
†
TAIYO YUDEN JMK212BJ475MG
C
10μF
CER
3406B F10
OUT
**
2.5V, 600mA
V
OUT
(4)
Figure 5
Figure 5 shows the complete circuit along with its ef-
fi ciency curve.
100mV/DIV
500mA/DIV
500mA/DIV
100
90
80
70
60
50
40
30
20
10
I
V
0
LOAD
0.1
OUT
I
L
V
OUT
V
V
I
LOAD
IN
OUT
= 2.5V
= 3.6V
= 2.5V
= 300mA TO 600mA
OUTPUT CURRENT (mA)
1
Load Step
20μs/DIV
10
LTC3406AB
100
V
V
V
IN
IN
IN
3406B G03
= 2.7V
= 3.6V
= 4.2V
3406B F16
1000
13
3406abfa