Monolithic Power Systems Inc. MP2107ADN-LF-P

Overview

MP2107ADN-LF-P from Monolithic Power Systems is a 4A, 6V synchronous step-down switching regulator in an 8-pin SOIC-EP package with exposed pad. It operates from 2.7V–6V input, delivers adjustable output down to 0.8V (e.g., 1.8V @ 4A), integrates 80mΩ high-side and 60mΩ low-side MOSFETs, and features 1.5MHz fixed-frequency PWM control with peak current mode for compact point-of-load designs in FPGA core supplies.

For engineers reviewing the MP2107ADN-LF-P datasheet, MP2107ADN-LF-P pinout, MP2107ADN-LF-P application, or MP2107ADN-LF-P equivalent, this device supports precise ±10% power-good monitoring, frequency synchronization (1–2MHz), internal soft-start (120µs), hiccup short-circuit protection, and thermal shutdown-critical for stable µP/I/O rail generation in space-constrained industrial and telecom systems.

Technical Context

The MP2107ADN-LF-P implements peak current-mode PWM control with integrated Type II compensation, eliminating external loop components while enabling bandwidth adjustment via FB resistor selection. Its transconductance gain of 11.25A/V links COMP voltage directly to output current, simplifying stability analysis.

It uses dual-function EN/SYNC pin for enable control (1.6V turn-on, 0.4V shutdown) and external clock synchronization (1–2MHz), with automatic fallback to internal oscillator if sync signal violates 4µs ON/OFF timing. The open-drain POK pin provides ±10% output regulation status with 30µs deglitching, and bootstrap circuitry (BS–SW capacitor) sustains high-side gate drive without external charge pump.

Key Specifications

Pinout & Package

The MP2107ADN-LF-P is housed in an 8-pin SOIC package with exposed thermal pad (SOIC8E), requiring solder connection of the pad to PCB ground plane for optimal thermal performance (θJC = 10°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2107DQ-LF-Z, the MP2107ADN-LF-P trades slightly lower thermal resistance for easier assembly and VCC flexibility; versus TPS54332DR, it offers superior integration (POK, sync, internal comp), tighter input range, and higher efficiency at 5V input-but requires careful SOIC8E pad soldering for full thermal spec compliance.

Availability

MP2107ADN-LF-P is available at Aetrix Electronics and suitable for FPGA core supplies, ASIC I/O rails, and telecom line card power conversion requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MP2107ADN-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 manufacturing partnerships.

The MP2107 series belongs to MPS's synchronous buck regulator product line, engineered for high-efficiency, low-footprint point-of-load conversion in computing, communications, and industrial embedded systems where thermal density and transient response are critical.

FAQ

What is the maximum recommended output current for continuous operation?

The MP2107ADN-LF-P is rated for 4A continuous output current under specified conditions: TA ≤ +85°C, with proper PCB thermal design (exposed pad soldered to ≥1in² copper area), 2.7–6V input, and adequate input/output capacitance. Derating is required above +85°C ambient or with insufficient copper pour.

Does the MP2107ADN-LF-P require an external Schottky diode?

No-this device integrates synchronous rectification with 60mΩ low-side MOSFET, eliminating the need for an external Schottky diode. However, MPS recommends adding one (e.g., B0530) near SW/GND pins when output current exceeds 2A to suppress voltage spikes and improve efficiency marginally.

How is the output voltage set, and what tolerance does the feedback reference have?

Output voltage is set using an external resistor divider from VOUT to GND, with FB connected to the divider midpoint. The internal reference is 0.800V ±24mV (±3%) over temperature, ensuring output accuracy within ±1% when using 0.5% resistors and proper layout.

Can the MP2107ADN-LF-P synchronize to an external clock, and what frequency range is supported?

Yes-the EN/SYNC pin accepts 1MHz to 2MHz square-wave or sine-wave clocks for synchronization. The device locks to the external frequency within a few cycles; if the clock pauses longer than 4µs, it reverts to internal 1.5MHz operation.

What thermal considerations apply to the SOIC8E package?

The SOIC8E package requires the exposed thermal pad to be soldered to a minimum 1in² copper area connected to GND for θJA = 50°C/W. Without pad connection, thermal resistance degrades significantly, risking thermal shutdown at >2.5A load even at +25°C ambient.

Is there a difference between MP2107 and MP2107A in terms of electrical specifications?

No-MP2107 (QFN10) and MP2107A (SOIC8E) share identical electrical specs, including current rating, efficiency, protection features, and timing parameters. The "A" suffix denotes only package variant and inclusion of VCC pin for flexible biasing, not functional differentiation.

What happens during output pre-bias startup?

When VOUT is pre-biased above the target voltage at startup, the MP2107ADN-LF-P disables both MOSFETs until the internal soft-start capacitor voltage exceeds the FB pin voltage. This prevents reverse current flow and potential damage to upstream sources or downstream loads.