Datasheet
MANUFACTURER COMPONENT WEBSITE PHONE
Central Semiconductor Diodes www.centralsemi.com 631-435-1110
Panasonic Inductors www.panasonic.com 402-564-3131
Sumida Inductors www.sumida.com 847-956-0666
International Rectifier MOSFETs www.irf.com 800-341-0392
Kemet Capacitors www.kemet.com 864-963-6300
Taiyo Yuden Capacitors www.t-yuden.com 408-573-4150
TDK Capacitors www.component.tdk.com 888-835-6646
Rubycon Capacitors www.rubycon.com 408-467-3864
Suggested External Component Manufacturers
TOP VIEW
1
2
3
4
5
10
9
8
7
6
OCSET
IN
DH
LXGND
VL
SS
FB
MAX8576
MAX8577
μMAX
BSTDL
1
2
3
4
5
10
9
8
7
6
OCSET
EN
DH
LXGND
V
CC
SS
FB
MAX8578
MAX8579
μMAX
BSTDL
Pin Configurations
Chip Information
TRANSISTOR COUNT: 2087
PROCESSS: BICMOS
1) Place IC decoupling capacitors as close to IC pins
as possible. Place the input ceramic decoupling
capacitor directly across and as close as possible to
the high-side MOSFET’s drain and the low-side
MOSFET’s source. This is to help contain the high
switching current within this small loop.
2) For output current > 10A, a four-layer PC board is
recommended. Pour a ground plane in the second
layer underneath the IC to minimize noise coupling.
3) Input, output, and VL capacitors are connected to
the power ground plane with the exception of C12
and C22. These capacitors and all other capacitors
are connected to the analog ground plane.
4) Make the connection from the current-limit setting
resistor directly to the high-side MOSFET’s drain to
minimize the effect of PC board trace resistance
and inductance.
5) Place the MOSFET as close as possible to the IC to
minimize trace inductance. If parallel MOSFETs are
used, keep the gate connection to both gates
equal.
6) Connect the drain leads of the power MOSFET to a
large copper area to help cool the device. Refer to
the power MOSFET data sheet for the recommend-
ed copper area.
7) Place the feedback components as close to the IC
pins as possible. The feedback divider-resistor from
FB to the output inductor should be connected
directly to the inductor and not sharing with other
connections to this node.
8) Refer to the EV kit for further guidelines.
MAX8576–MAX8579
3V to 28V Input, Low-Cost, Hysteretic
Synchronous Step-Down Controllers
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