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DEMO MANUAL DC2745A
BOARD PHOTO
CIRCUIT SCHEMATIC
High Efficiency, 2MHz, 1.2V 6A Step-Down Converter
V
IN
1µF
10µF
0201
EN
MODE/SYNC
RT
2
= 2.25V TO 5.5V
1µF
0201
SW
V
V
IN
IN
SW
FB
LTC3309A
V
IN
10nF
AGND
PGND
PGOOD
f
= 2MHz
OSC
10µF
220nH
V
OUT
1.2V
6A
6.8pF
140k
47µF
x2
100k
dc2745a T01a
LTC3309A 3.3V to 1.2V Efficiency and
Powerloss DC2745A in Burst Mode
100
90
EFFICIENCY
80
70
60
50
40
POWER LOSS
30
V
V
20
f
10
XFRMS INC. XFHCL43LT–R22
0
0.001
0.01
0.1
LOAD CURRENT (mA)
10
1
0.1
0.01
= 3.3V
IN
= 1.2V
0.001
OUT
= 2MHz
SW
0.0001
1
6
DC2745A TA01b
Rev. 0
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