Datasheet

MAX1970/MAX1971/MAX1972
Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
16 ______________________________________________________________________________________
Figure 5. Setting the Output Voltage with External Resistors
11
10
3
6
13
12
7
8
4
1
9
16
2
10Ω
100kΩ
14
V
CC
RSI
EN
COMP1
COMP2
FBSEL1
FBSEL2
GND
REF
V
OUT1
RSI
10µF
10µF
680pF
R
C1
R
C2
680pF
0.1µF
4.7µH
0.1µF
LX1
FB1
PGND
IN
MAX1971
5
10µF
R
2a
R
2b
R
1a
R
1b
FB2
15
V
OUT2
4.7µH
LX2
EN
V
IN
2.6V TO 5.5V
POR
POR
Figure 6. Setting an Output Below 1.2V
11
10
3
6
13
12
7
8
4
1
9
16
2
10Ω
100kΩ
14
V
CC
V
CC
PFO
EN
COMP1
COMP2
FBSEL1
FBSEL2
GND
REF
V
OUT1
1.0V
RSI
100kΩ
V
CC
10µF
680pF
27kΩ
68kΩ
680pF
0.1µF
4.7µH
0.1µF
LX1
FB1
PGND
IN
MAX1970
5
10µF
R2
13kΩ
R1
2kΩ
FB2
15
V
OUT2
2.5V
4.7µH
LX2
EN
V
IN
3V TO 3.6V
POR
POR