MP1584EN-LF-Z is a high-performance synchronous step-down DC-DC converter launched by Monolithic Power Systems (MPS), belonging to the MP1584 series. It features a wide input voltage range, high integration, and high efficiency, making it suitable for low-voltage power conversion scenarios with limited space. Its core parameters and characteristics are as follows:

I. Core Electrical Parameters

Input Voltage Range (VIN)：4.5V ~ 28V, supporting various input scenarios such as lithium batteries (multi-cell), automotive power supplies (12V), and industrial power supplies (24V).

Output Voltage (VOUT)：Adjustable, ranging from 0.8V to 20V, precisely set via an external feedback resistor (FB pin) with an output voltage accuracy of ±2% (at room temperature).

Output Current：

Continuous Output Current (IOUT)：3A (at room temperature, under proper heat dissipation conditions).

Peak Output Current：4A (for short-term overloads).

Efficiency：Up to 94% (typical operating condition: 12V input, 5V output, 1A load). Efficiency remains above 85% at light loads (<100mA), offering excellent energy efficiency.

Switching Frequency (fSW)：Fixed at 1.5MHz, supporting the use of small inductors (10μH recommended) and ceramic capacitors to reduce PCB space occupation.

Operating Temperature Range：-40℃ ~ +125℃ (junction temperature), meeting the wide temperature requirements of industrial-grade and automotive electronics (non-automotive certified).

II. Functions and Protection Features

Synchronous Rectification Design：Integrates high-side PMOS and low-side NMOS switches, eliminating the need for an external freewheeling diode, reducing conduction losses, and simplifying circuit design.

Protection Mechanisms：

Over-Current Protection (OCP)：When the output current exceeds the threshold (typically 4.5A), the hiccup mode limits the current to prevent chip damage.

Over-Temperature Protection (OTP)：Automatically shuts down when the junction temperature exceeds 165℃, and resumes operation when the temperature drops below 145℃.

Under-Voltage Lockout (UVLO)：Shuts down the output when the input voltage is below 3.8V (typical value) to prevent false startup under low voltage.

Output Over-Voltage Protection (OVP, optional)：Fast shutdown during output over-voltage can be achieved through external circuit configuration.

Soft-Start Function：Built-in 2ms soft-start time to reduce input current surges during startup.

III. Package and Physical Characteristics

Package Type：SOP-8 (Small Outline Package) with an exposed thermal pad, where the pad size is 3.3mm×2.3mm, enhancing heat dissipation capability (thermal resistance θJA ≈ 40℃/W).

Pin Definition：8 pins correspond to functions such as input (VIN), ground (GND), feedback (FB), enable (EN), and output (SW, switching node). The pin pitch is 1.27mm, compatible with conventional PCB designs.

Environmental Compliance：Uses lead-free (Pb-Free) technology, complies with RoHS standards, and is compatible with reflow soldering (peak temperature 260℃).

Packaging Form：Tape & Reel packaging, with a standard quantity of 2500 units per reel, supporting automated surface-mount production.

IV.Typical Application Scenarios

Consumer Electronics：Auxiliary power supplies for laptops, smart home devices (e.g., routers, cameras), and voltage conversion for portable instruments.

Industrial and Automotive Applications：Power supply for industrial sensors (3.3V/5V), automotive USB chargers (12V to 5V), and control modules for automation equipment.

Embedded Systems：Providing stable low-voltage power (e.g., 1.8V/3.3V) for core chips such as microcontrollers (MCUs), FPGAs, and DSPs.