Manual

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
0Ω
POWER-GOOD
}
PGOOD1
N
L1
N
L2
N
H1
N
H2
C
BST1
0.1μF
C
BST2
0.1μF
DH1
BST1
DL1
LX1
ON1
ON2
OFFON
PGOOD2
R7
100kΩ
R6
100kΩ
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
1μF
LDOSEL
REF
C4
0.1μF
TON
X
OUT1/OUT2 SWITCHING FREQUENCY
OPEN (REF): 400kHz/300kHz
C2
1.0μF
R4
500kΩ
R5
100kΩ
R1
47Ω
C1
4.7μF
C5
10nF
C6
0.1μF
5V SMPS OUTPUT (OUT1)
C8
0.1μF
R
ILIM1
R
ILIM2
D2
C
IN
4 x 10μF 25V
C22
0.1μF
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.