The MP1584 is a high-frequency synchronous step-down DC-DC buck converter IC manufactured by MPS (Monolithic Power Systems). This IC is widely used for applications which demand high efficiency and a compact form factor, for example operating portable devices, IoT modules, and other low-power electronics.
Here's the complete datasheet for the MP1584:
- Input voltage range: 4.5V to 28V
- Output voltage range: 0.8V to 20V
- Maximum output current: 3A
- Switching frequency: 500kHz (typical)
- Efficiency: up to 95%
- Quiescent current: 80μA (typical)
The MP1584 has a total of 8 pins:
- Pin 7: VIN - Input voltage pin
- Pin 1: SW - Switching node pin
- Pin 5: GND - Ground pin
- Pin 4: FB - Feedback pin
- Pin 3: COMP - Compensation pin
- Pin 2: EN - Enable pin
- Pin 8: BST - Soft-start/tracking pin
- Pin 6: FREQ - Frequency adjust pin
The MP1584 buck converter module offers several features that make it a popular choice for step-down DC-DC conversion applications, including:
- Synchronous rectification for high efficiency
- Adjustable output voltage
- Stable with ceramic capacitors
- Over-current protection
- Over-temperature protection
- Under-voltage lockout
- Short-circuit protection
Package and Ordering Information
The MP1584 is available in several different package options, including SOIC8 and QFN10. Here's the ordering information for the SOIC8 package:
- MP1584EN-LF-Z: SOIC8 package, lead-free, RoHS compliant
- MP1584EN-LF-Z TR: SOIC8 package, lead-free, RoHS compliant, tape and reel packaging
And here's the ordering information for the QFN10 package:
- MP1584EN-LF-Z: QFN10 package, lead-free, RoHS compliant
- MP1584EN-LF-Z TR: QFN10 package, lead-free, RoHS compliant, tape and reel packaging
Environmental and Regulatory Compliance
- Operating temperature range: -40°C to +85°C
- Lead-free and RoHS compliant
Application Circuit Diagram
The MP1584 application circuit is a standard step-down DC-DC converter circuit that is meant to convert a larger input voltage to a smaller output voltage. Here's a full description of the circuit's different components and their capabilities:
VIN: The input voltage pin, to which you attach your input voltage source. The MP1584 accepts input voltages ranging from 4.5V to 28V and steps them down to the necessary output value.
SW: The switching node pin interfaces to an inductor, which stores and releases energy throughout the switching operation. The inductor is a component of the MP1584's internal control loop, and it facilitates in the regulation of the output voltage.
GND: The ground pin, which connects the ground of your input and output circuits.
The feedback pin (FB) is used to adjust the output voltage. To configure the desired output voltage, connect a voltage divider network between the output voltage and this pin.
COMP: The compensation pin is used to modify the stability of the feedback loop. To stabilize the feedback loop, put a capacitor between this pin and ground.
EN: The MP1584 may be powered on and off via this enable pin. To regulate the output voltage, you can link this pin to a switch or a logic signal.
The output voltage ramp-up time is adjusted using the SS/TR pin, which is also known as the soft-start/tracking pin. To adjust the ramp-up period, attach a capacitor between this pin and ground.
VOUT: You attach your output load to this pin, which is the output voltage pin. The MP1584 can provide an output current of up to 3A and a voltage range of 0.8V to 20V.
In summary, the MP1584 application circuit uses an inductor, a feedback network, and a control loop to regulate the output voltage.
The various pins on the IC are used to control the switching frequency, enable/disable the IC, and adjust the feedback loop stability and output voltage ramp-up time.
The application circuit is a basic building block for a wide range of DC-DC converter circuits, and it can be easily customized for different input and output voltage requirements.
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