Monolithic Power Systems Inc. MP2030DU-LF-Z

Overview

MP2030DU-LF-Z from Monolithic Power Systems is a 3A dual-supply very low dropout linear regulator with NMOS pass architecture, using separate BIAS (2.5–5.5V) and VIN (1.1–5.5V) inputs to enable ultra-low dropout operation down to 150mV at full load. It delivers adjustable output from 0.9V to 3.6V with ±2% accuracy, 80µV_RMS output noise, and 32dB PSRR at 100kHz-optimized for post-regulation in high-efficiency DC/DC systems such as server VRMs and telecom power modules.

For engineers reviewing the MP2030DU-LF-Z datasheet, MP2030DU-LF-Z pinout, MP2030DU-LF-Z application, or MP2030DU-LF-Z equivalent, key selection criteria include dual-supply efficiency trade-offs, thermal performance in 5×5 QFN32 package, stability with 1µF ceramic output capacitors, and integration of power-good signaling with 160µs delay for sequencing-critical systems.

Technical Context

The MP2030DU employs a bias-fed NMOS pass transistor architecture: internal reference, error amplifier, and gate driver are powered by the BIAS rail (2.5–5.5V), while load current flows directly from VIN through the pass device to VOUT. This decouples control power from output power path, enabling VIN to operate as low as VOUT + 0.2V while maintaining regulation.

It integrates soft-start (550µs), open-drain PGOOD with 440mV threshold and 160µs delay, thermal shutdown at 135°C with 15°C hysteresis, and internal current limit at ~4.5A. Stability is guaranteed with ultra-low-ESR ceramic capacitors ≥1µF on VIN and ≥4.7µF on VOUT, eliminating need for tantalum or electrolytic types.

Key Specifications

Pinout & Package

MP2030DU-LF-Z is housed in a RoHS-compliant 5mm × 5mm QFN32 package with exposed thermal pad (JEDEC MO-229 VEED-5). The package supports high-power dissipation (θ_JA = 36°C/W) and requires solder paste stencil design per recommended land pattern.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply LDO applications.

Compared with TPS7A8300RGRT and ADM7172ACPZ-R7, MP2030DU-LF-Z uniquely enables VIN-to-VOUT headroom as low as 200mV while maintaining 3A delivery-making it optimal for energy-constrained, multi-rail systems where upstream converter efficiency and thermal footprint are prioritized over absolute noise floor.

Availability

MP2030DU-LF-Z is available at Aetrix Electronics and suitable for server VRMs, telecom line cards, set-top box SoC power, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2030DU-LF-Z 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 MP2030 belongs to MPS's high-current LDO product line, engineered specifically for post-regulation in high-efficiency power architectures-emphasizing dual-supply operation, ultra-low dropout, and seamless integration with switching regulators in datacenter, networking, and broadcast equipment.

FAQ

What is the minimum recommended output capacitance for MP2030DU-LF-Z?

The MP2030DU-LF-Z is stable with a minimum 4.7µF ceramic capacitor on the VOUT pins. This value ensures adequate phase margin and transient response under 3A load steps. Using lower values may cause instability or excessive overshoot; X5R/X7R dielectrics with ≤10mΩ ESR are recommended.

Can the BIAS pin be connected to the same rail as VIN?

Yes, BIAS can be tied to VIN if VIN remains within 2.5V–5.5V and is sufficiently stable under load. However, best practice is to derive BIAS from a cleaner, lower-noise rail (e.g., 3.3V LDO) to minimize reference noise coupling into the feedback loop and preserve PSRR performance.

How does the PGOOD signal behave during thermal shutdown?

During thermal shutdown, the PGOOD output is actively pulled low and remains low until both junction temperature falls below the hysteresis threshold (120°C) and VOUT recovers to ≥90% of its regulated value. This ensures downstream logic is held in reset until safe thermal and electrical conditions are restored.

Is the MP2030DU-LF-Z pin-compatible with the MP2030DQ variant?

No-MP2030DU-LF-Z uses a 5mm × 5mm QFN32 package with 20 active pins (including four VOUT and four VIN), while MP2030DQ is a 3mm × 3mm QFN10 with only 10 pins. PCB layout, thermal pad size, and pin mapping are incompatible; redesign is required for substitution.

What is the maximum allowable power dissipation in the 5×5 QFN32 package at 70°C ambient?

At TA = 70°C, the MP2030DU-LF-Z's maximum power dissipation is 1.8W, based on θ_JA = 36°C/W and maximum junction temperature of 135°C. For example, with VIN = 2.0V, VOUT = 1.2V, and IOUT = 3A, PD = 2.4W exceeds this limit-requiring enhanced PCB copper area or airflow to maintain safe operation.

Does the MP2030DU-LF-Z support remote sensing?

No-the MP2030DU-LF-Z does not include dedicated remote sense pins. Output voltage regulation is based solely on the FB pin voltage, which must be connected to the local VOUT net. For applications requiring compensation of PCB trace IR drop, an external resistive divider with Kelvin connection to the load is necessary-but adds complexity and reduces accuracy.

What is the purpose of the BYPASS pin, and why must it not be resistively loaded?

The BYPASS pin connects to an internal soft-start capacitor that controls the 550µs output voltage ramp. Loading it with resistance would discharge the internal capacitor, disrupting soft-start timing and potentially causing inrush current spikes. Only a 1nF capacitor should be connected-no resistors, no traces to other nets.