LTC3417A-1 Linear Technology, LTC3417A-1 Datasheet - Page 17

• Manufacturer Part Number: LTC3417A-1
• Description: Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator with POR
• Manufacturer: Linear Technology

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