Datasheet

LTC3417A-2
17
3417a2fa
Figure 4. 1.8V at 1.5A/2.5V at 1A Step-Down Regulators
OUT1 Effi ciency vs Load Current
SYNC/MODE
SW1
RUN1
V
FB1
PHASE
I
TH1
PGOOD
SW2
RUN2
V
FB2
FREQ
I
TH2
V
IN1
LTC3417A-2
GNDA
EXPOSED
PAD GNDD
V
IN2
C
IN
10µF
C
IN1
0.1µF
C
IN2
0.1µF
L1
1.5µH
L2
2.2µH
C1 22pF
R1 511k
C2 22pF
R3 866k
V
IN
V
IN
V
IN
R7
100k
R2
412k
R4
412k
C
OUT2
22µF
R5
5.9k
R6
2.87k
C3
2200pF
C4
6800pF
3417A-2 F04
C
OUT1
47µF
V
OUT1
1.8V
1.5A
V
OUT2
2.5V
1A
V
IN
2.25V TO 5.5V
L1: MIDCOM DUS-5121-1R5R
C
OUT1
: KEMET C1210C226K8PAC
L2: MIDCOM DUS-5121-2R2R
C
OUT2
, C
IN
: KEMET C1206C106K4PAC
LOAD CURRENT (A)
80
EFFICIENCY (%)
POWER LOSS (W)
90
100
75
85
95
0.001 0.1 1 10
3417A-2 F04a
70
0.1
10
0.01
1
0.001
0.01
V
IN
= 3.6V
V
OUT
= 1.8V
FREQ = 1MHz
REFER TO FIGURE 4
EFFICIENCY
POWER LOSS
APPLICATIONS INFORMATION