MAX8655 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8655 Datasheet PDF : 23 Pages
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Highly Integrated, 25A, Wide-Input,
Internal MOSFET, Step-Down Regulator
Pin Description (continued)
PIN
NAME
FUNCTION
40
ILIM2
Programmable Current-Limit Input. Connect a resistor from ILIM2 to GND to set the valley current
limit. See the Setting the Current Limit section.
Programmable Slope-Compensation Input. Internal slope-compensation voltage rate is the voltage at
41
SCOMP SCOMP times 0.1 divided by the oscillator period (T). Connect SCOMP to AVL or GND to set to the
default of 250mV/T or 125mV/T, respectively.
Open-Drain Power-OK Output. POK goes high impedance when the output voltage rises above 91%
43
POK
of the nominal regulation voltage. POK pulls low during shutdown or when the output drops below
88% of the nominal regulation voltage.
Frequency Set and Synchronization Input. Connect a resistor from FSYNC to GND to set the switching
44
FSYNC frequency, or drive with a clock signal to synchronize between 160kHz and 1.2MHz. See the
Switching Frequency and Synchronization section.
Current-Limit Operating Mode Selection. Connect MODE to AVL for latch-off current limit or connect
45
MODE
MODE to GND for automatic recovery current limit.
46
SYNCO
Synchronization Output. Provides a clock output for synchronizing another MAX8655 with 180°
out-of-phase operation.
47
BST
Boost Capacitor Connection. Connect a 0.22µF ceramic capacitor from BST to LXB.
50
LXB
LX Boost Capacitor Connection. Connect a 0.22µF ceramic capacitor between LXB and BST.
—
GND-EP Exposed Pad. Connect to GND externally. See the Pin Configuration.
—
PVIN-EP Exposed Pad. Internally connected to PVIN. See the Pin Configuration.
—
LX-EP Exposed Pad. Internally connected to LX. See the Pin Configuration.
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