Explore MP1584 pins, signal names, electrical functions and connection guidance for each package.
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Click a lead or use the arrow keys. Top view · 8 leads; underside exposed pad = GND5
The internal high-side MOSFET drives this node. The inductor and external catch diode complete the buck power stage.
Connect the inductor to the output and the Schottky cathode to SW; its anode returns to ground.
SW is a noisy switching node, not the regulated DC output.
A high level enables operation; a low level disables it. An open pin also enables the device.
Leave open for the fixed 12 V example, or drive within the specified pin limits.
Typical rising threshold 1.5 V. Do not tie EN directly to a 12 V input; its absolute maximum is 6 V.
Error-amplifier output used to shape the converter feedback loop.
Fit the reviewed series RC network from COMP to ground.
Compensation depends on the inductor, output capacitance, ESR and operating conditions.
The control loop compares the divided output to a nominal 0.8 V reference.
Connect the midpoint of the output-to-ground divider.
Route away from SW and the high-current loop.
Return for control and power circuitry. The exposed underside pad also connects to ground.
Join pin 5 and the exposed pad to a suitable ground plane.
The footprint repeats electrical pad number 5 on the exposed pad; it does not invent a separate signal pin.
A resistor from FREQ to ground sets the switching frequency.
Use 200 kΩ in the approximately 500 kHz example.
The frequency setting is nominal; light-load pulse skipping changes the observed switching activity.
Supplies the internal control and high-side switching stage.
Place a low-ESR input bypass close to VIN and the power return.
Operating input is 4.5–28 V; 30 V is an absolute stress limit, not a working target.
Provides gate-drive supply above the SW node.
Connect 100 nF between BST and SW, with short traces.
Observe the 6 V absolute BST-to-SW limit; this capacitor does not connect to ground.
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