Datasheet

MAX8576–MAX8579
3V to 28V Input, Low-Cost, Hysteretic
Synchronous Step-Down Controllers
10 ______________________________________________________________________________________
Figure 2. MAX8576/MAX8577 Typical Application Circuit
Q2
R2
1
2
3
4
5
10
9
8
7
6
OCSET
IN
DH
LXGND
VL
SS
FB
MAX8576
MAX8577
BSTDL
INPUT
9V TO 24V
Q3
12V INPUT, 1.8V/12A OUTPUT (f
S
= 300kHz)
CIRCUIT IS TARGETED FOR 10.8V TO 13.2V INPUT. HOWEVER, INPUT RANGE OF 9V TO 24V
IS POSSIBLE FOR IC EVALUATION. 30V RATED MOSFET MUST BE INSTALLED IF INPUT IS
RAISED ABOVE 16V. ALL OTHER COMPONENTS CAN REMAIN UNCHANGED.
R1
D1
C6
C4
C7
R3
C13
R6
C11
C5
L1
OUTPUT
1.8V/12A
C3
Q1
C1
C2
C8
C12
C9
C10
R4
R5
ON
OFF
R7
R8
Figure 3. MAX8578/MAX8579 Typical Application Circuit
Q5
R10
1
2
3
4
5
10
9
8
7
6
OCSET
EN
DH
LXGND
V
CC
SS
FB
MAX8578
MAX8579
BSTDL
12V INPUT, 1.8V/5A OUTPUT (f
S
= 500kHz, ALL CERAMIC)
CIRCUIT IS TARGETED FOR 10.8V TO 13.2V INPUT. HOWEVER, INPUT RANGE OF 9V TO 24V
IS POSSIBLE FOR IC EVALUATION. 30V RATED MOSFET MUST BE INSTALLED IF INPUT IS
RAISED ABOVE 16V. ALL OTHER COMPONENTS CAN REMAIN UNCHANGED.
R9
D2
C17
C16
C18
R11
C23
R12
C21
L2
V
OUT
1.8V/5A
Q4
C15
C14
C19
C20 C22
ON
OFF
R13
INPUT
9V TO 24V
3V TO 5.5V