Rainbow Electronics MAX17101 - Manual (Page 15)

MAX17101
Dual Quick-PWM, Step-Down Controller
with Low-Power LDO, RTC Regulator
______________________________________________________________________________________ 15
Figure 1. Standard Application Circuit—Main Supply
LDO
DH2
BST2
5V LDO OUTPUT
INPUT (V IN )*
7V TO 24V
5V OUTPUT
DL2
LX2
PGND
AGND
RGND
0 Ω
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
REFIN2
ONLDO
IN
RTC
V DD
V
CC
PAD
3.3V OUTPUT
12V TO 15V
CHARGE
PUMP
SECFB
BYP
C3
1
μF
LDOSEL
REF
C4
0.1 μF
TON X
OUT1/OUT2 SWITCHING FREQUENCY
OPEN (REF): 400kHz/300kHz C2
1.0 μF
R4
500k Ω
R5
100k Ω
R1
47 Ω
C1
4.7 μF
C5
10nF
C6
0.1 μF
5V SMPS OUTPUT (OUT1)
C8
0.1 μF
R
ILIM1 R
ILIM2
D2
C IN
4 x 10 μF 25V
C22
0.1 μF
D
X1
D
X2
RTC SUPPLY
D1
SKIP
POWER GROUND
ANALOG GROUND
MAX17101
C7
10nF
*LOWER INPUT VOLTAGES REQUIRE
ADDITIONAL INPUT CAPACITANCE. IF
OPERATING NEAR DROPOUT, COMPONENT
SELECTION MUST BE CAREFULLY DONE TO
ENSURE PROPER OPERATION.
PLACE C22 BETWEEN IN AND PGND AS
CLOSE TO THE MAX17101 AS POSSIBLE.