Rainbow Electronics MAX8668 - Manual (Page 12)

MAX8667/MAX8668
1.5MHz Dual Step-Down DC-DC Converters
with Dual LDOs and Individual Enables
12 ______________________________________________________________________________________
IN34
1.7V TO 5.5V
LX1 LX2
OUT1 OUT2
INPUT
2.8V TO 5.5V
OUT3
OUT4
REF
GND
IN12
300mA
300mA
EN1
EN2
EN3
EN4
OUT2
1.2A
OUT1
600mA
PGND2 PGND1
C2
10 μF
C3
4.7 μF
C8
4.7 μF
C9
4.7
μF
C1
0.01 μF
L2
2.2 μH
L1
2.2 μH
C7
2.2 μF
C6
2.2
μF
MAX8667
Figure 3. MAX8667 Typical Application Circuit
IN34
LX1 LX2
FB1 FB2
INPUT
2.6V TO 5.5V
OUT3
OUT4
REF
GND
IN12
OUT3, 300mA
OUT4, 300mA
EN1
EN2
EN3
EN4
OUT2
0.6V TO 3.3V, 1.2A
OUT1
0.6V TO 3.3V, 600mA
PGND1 PGND2
C2
10 μF
C8
4.7 μF
C9
4.7
μF
C1
0.01 μF
L2
2.2 μH
L1
2.2 μH
C7
2.2 μF
C6
2.2
μF
R1
R2
*C10, R5, AND R6 ARE OPTIONAL
R6*
C4
MAX8668
R3
R4
R5*
C5
C10*
Figure 4. MAX8668 Typical Application Circuit