Monolithic Power Systems Inc. MP2562DS-LF-P

Overview

MP2562DS-LF-P from Monolithic Power Systems is a 1A, 4MHz, 50V non-synchronous step-down DC/DC converter with integrated 460mΩ high-side MOSFET, current-mode control, and programmable switching frequency (up to 4MHz). It operates from 4.5V to 50V input, delivers adjustable output from 0.8V to 47V, and achieves up to 95% efficiency in automotive and industrial power systems.

For engineers reviewing the MP2562DS-LF-P datasheet, MP2562DS-LF-P pinout, MP2562DS-LF-P application, or MP2562DS-LF-P equivalent, key selection criteria include its 12µA shutdown quiescent current for battery-powered use, internal soft-start, ceramic-capacitor stability, and SOIC8 package compatibility with high-voltage distributed power designs.

Technical Context

The MP2562DS-LF-P implements variable-frequency peak-current-mode control with internal error amplifier (200 V/V gain, 60 µA/V transconductance), precision 0.8V feedback reference, and cycle-by-cycle current limiting without external sense resistors. Its oscillator frequency is set by an external resistor on the FREQ pin, enabling precise EMI management via 4MHz operation.

It features integrated bootstrap driver with 5V regulated BST supply, UVLO (3.0V rising threshold, 0.4V hysteresis), thermal shutdown (150°C trip, 15°C hysteresis), and dedicated EN pin with 1.5V enable threshold and 300mV hysteresis - all optimized for robust operation in automotive transients and industrial ambient conditions.

Key Specifications

Pinout & Package

MP2562DS-LF-P uses the SOIC8 package (body size 4.9mm × 3.9mm, 1.27mm pitch), with exposed pad omitted (QFN10 only). Thermal resistance θ_JA = 96°C/W enables 1.3W continuous dissipation at +25°C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down converter applications.

Compared with LM5164PWPR and TPS54340DDAR, MP2562DS-LF-P uniquely combines 50V input rating, 4MHz programmability, and SOIC8 integration - making it optimal for space-constrained, high-EMI environments like automotive infotainment and industrial IoT edge nodes.

Availability

MP2562DS-LF-P is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, and distributed telecom power modules requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP2562DS-LF-P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global distribution since 1997.

The MP2562 belongs to MPS's high-voltage buck converter product line, engineered specifically for automotive, industrial, and telecom applications demanding wide input range, high switching frequency, and minimal external component count.

FAQ

What is the maximum recommended input voltage for reliable 4MHz operation?

The MP2562DS-LF-P supports 4MHz switching up to 24V input per manufacturer guidance. At 50V input, frequency must be reduced (e.g., to ≤2MHz) to maintain minimum on-time margin and prevent pulse-skipping instability - verified in Figure 2 of the Rev. 1.0 datasheet.

Can MP2562DS-LF-P operate with 3.3V input?

No. The absolute minimum operating input voltage is 4.5V, enforced by internal UVLO (rising threshold 3.0V, hysteresis 0.4V). Below 4.5V, the device will not regulate - confirmed in Recommended Operating Conditions table on page 3 of the datasheet.

Is an external bootstrap diode required for SOIC8 package operation?

No. The MP2562DS-LF-P's internal bootstrap regulator charges the BST capacitor directly from VIN through an internal PMOS transistor. An external diode is only needed in high-duty-cycle (>85%) applications where internal charging time is insufficient - not typical for SOIC8-based 1A designs.

How does the frequency foldback feature affect light-load efficiency?

At loads below ~100mA, the MP2562DS-LF-P automatically reduces switching frequency to scale down gate-driving and switching losses. This maintains >85% efficiency at 1mA load - measured in Typical Performance Characteristics (Figure 4, page 5) - unlike fixed-frequency converters that suffer disproportionate light-load losses.

What is the purpose of the exposed pad in QFN10 versus SOIC8 packages?

The exposed pad is present only in the QFN10 variant (MP2562DQ-LF-P) and must be soldered to a thermal pad on the PCB for heat dissipation. The SOIC8 package (MP2562DS-LF-P) has no exposed pad - its thermal path relies solely on leads and PCB copper, reflected in its higher θ_JA (96°C/W vs 50°C/W for QFN10).

Does the COMP pin require external components for basic operation?

Yes. The COMP pin is the error amplifier output and must be connected to an external RC compensation network (e.g., 120kΩ + 220pF for 3.3V output) to ensure loop stability and fast transient response - detailed in Table 3 and Compensation Components section (pages 12–13) of the datasheet.

What failure protections are built into MP2562DS-LF-P?

The device integrates thermal shutdown (150°C trip), input UVLO (3.0V rising, 2.6V falling), cycle-by-cycle current limiting (1.8A), and bootstrap UVLO (2.2V). All protections are fully internal - no external circuitry required - and provide autonomous fault recovery without latch-up.