Rainbow Electronics MAX17101 - Manual (Page 29)

MAX17101
Dual Quick-PWM, Step-Down Controller
with Low-Power LDO, RTC Regulator
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Figure 5. Standard Output Application Circuit—Chipset Supply
BYP
DH2
BST2
5V SYSTEM SUPPLY
INPUT (V IN )*
7V TO 24V
1.5V OUTPUT
DL2
LX2
PGND
POWER-GOOD
} PGOOD1
N L1
N
L2
N
H1
N H2
C
BST1
0.1 μF
C BST2
0.1 μF
DH1
BST1
DL1
LX1
ON1
ON2 OFF ON
PGOOD2
R7
100k
Ω
R6
100k Ω
L1
C OUT1
C OUT2
ILIM1
OUT1
FB1
L2
ILIM2
OUT2
ONLDO
IN
V DD
V
CC
PAD
1.05V OUTPUT
3.3V SMPS SUPPLY
SECFB
TON X
OUT1/OUT2 SWITCHING FREQUENCY
OPEN (REF): 400kHz/300kHz
C1
4.7 μF
C2
1.0 μF
3.3 SMPS SUPPLY
C5
1 μF
R ILIM1
R ILIM2
C IN
2x 10 μF 25V
SKIP
POWER GROUND
ANALOG GROUND
MAX17101
LDO 3.3V LDO OUTPUT
C6
4.7 μF
C22
0.1 μF
REFIN2
R10
47 Ω
LDOSEL
RTC
C3
1
μF
REF
C4
0.1 μF
RTC SUPPLY
PLACE C22 BETWEEN IN AND PGND AS
CLOSE TO THE MAX17101 AS POSSIBLE.
AGND
RGND
0 Ω