Datasheet

MAX1970/MAX1971/MAX1972
Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
______________________________________________________________________________________ 15
Figure 3. Typical Application Circuit 1
11
10
3
6
12
13
7
8
4
1
9
15
5
16
2
14
V
CC
V
CC
V
CC
PFO
EN
COMP1
V
IN
3.3V TO 5.5V
COMP2
FBSEL2
FBSEL1
REF
POR
POR
V
OUT1
3.3V
V
OUT2
1.5V
PFO
100kΩ
82kΩ
680pF
680pF
39kΩ
100kΩ
10Ω
10µF
10µF
10µF
0.1µF
0.1µF
4.7µH
4.7µH
LX1
FB2
FB1
LX2
PGNDGND
IN
MAX1972
EN
Figure 4. Typical Application Circuit 2
11
10
3
6
13
12
7
8
4
1
9
15
5
16
2
14
V
CC
V
CC
V
CC
PFO
EN
COMP1
V
IN
3.3V TO 5.5V
COMP2
FBSEL1
FBSEL2
REF
V
OUT1
3.3V
V
OUT2
2.5V
PFO
100kΩ
82kΩ
680pF
680pF
62kΩ
100kΩ
10Ω
10µF
10µF
10µF
0.1µF
0.1µF
4.7µH
4.7µH
LX1
FB2
FB1
LX2
PGND
GND
IN
MAX1970
MAX1972
EN
POR
POR