Monolithic Power Systems Inc. MP2030DQ-LF-P

Overview

MP2030DQ-LF-P from Monolithic Power Systems is a dual-supply very low dropout linear regulator (LDO) with NMOS pass device architecture, using separate BIAS and IN supplies to enable high-efficiency regulation at ultra-low input-to-output differentials. It delivers up to 3A output current with 150mV dropout at full load, 0.9V–3.8V adjustable output, ±2% accuracy, and 80µV_RMS output noise - deployed in post-regulation for buck converters in telecom servers and set-top boxes.

For engineers reviewing the MP2030DQ-LF-P datasheet, MP2030DQ-LF-P pinout, MP2030DQ-LF-P application, or MP2030DQ-LF-P equivalent, key selection criteria include dual-supply operation (VIN + VBIAS), thermal protection hysteresis (15°C), power-good timing (160µs delay), low 220µA bias current, and stability with 1µF ceramic output capacitors.

Technical Context

The MP2030DQ-LF-P employs a split-power architecture: the BIAS supply (2.5V–5.5V) powers internal reference, error amplifier, and gate drive circuitry, while the IN supply (1.1V–5.5V) feeds the NMOS pass transistor's drain-enabling VIN to sit just 150mV above VOUT without compromising regulation. This decouples control-loop power from load current path, minimizing ground current dependency on load.

Its feedback threshold is fixed at 0.5V, enabling precise output setting via external resistor divider; the PGOOD open-drain output asserts after 160µs once VFB exceeds 440mV; soft-start time is 550µs with BYPASS pin connected to 1nF capacitor; thermal shutdown activates at 135°C with 15°C hysteresis.

Key Specifications

Pinout & Package

MP2030DQ-LF-P is housed in a RoHS-compliant 3mm × 3mm QFN-10 package with exposed thermal pad (pin 5). The compact footprint supports high-density PCB layouts in space-constrained telecom modules and embedded computing platforms.

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, MP2030DQ-LF-P uniquely enables sub-200mV VIN–VOUT headroom at 3A while maintaining low noise and thermal robustness - making it optimal for high-current, space- and efficiency-constrained post-regulation.

Availability

MP2030DQ-LF-P is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, and consumer AV equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2030DQ-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 MP2030 belongs to MPS's high-current LDO product line, engineered specifically for post-regulation in high-efficiency power architectures where minimal VIN–VOUT differential, low noise, and thermal resilience are critical.

FAQ

What is the minimum input voltage required for MP2030DQ-LF-P to regulate a 1.2V output?

The minimum IN voltage is VOUT + dropout = 1.2V + 0.15V = 1.35V at 3A load. However, BIAS must also be ≥2.5V for proper internal circuit operation. Both supplies must meet their respective minimums simultaneously - IN can be as low as 1.35V only if BIAS is independently supplied at ≥2.5V.

Can MP2030DQ-LF-P operate with only the IN supply and leave BIAS unconnected?

No. BIAS is mandatory and must be connected to a 2.5V–5.5V source. Leaving BIAS floating or below 2.35V triggers under-voltage lockout, preventing startup. The internal reference, error amplifier, and gate driver all depend on BIAS - it is not optional.

How does the BYPASS pin affect soft-start and fault behavior?

The BYPASS pin connects to a 1nF capacitor that sets the 550µs soft-start ramp. During UVLO, thermal shutdown, or EN disable, the internal soft-start capacitor is discharged to ground - halting output ramp and holding VOUT at zero until normal conditions resume.

What is the maximum allowable power dissipation for MP2030DQ-LF-P in its QFN-10 package?

At TA = 70°C, maximum power dissipation is 1.3W. With θ_JA = 50°C/W, this corresponds to a 65°C junction rise above ambient. For continuous 3A operation at 150mV dropout (0.45W), junction temperature remains well within the 150°C absolute max - no heatsink needed unless ambient exceeds 85°C or power loss exceeds 1.3W.

Is MP2030DQ-LF-P compatible with ceramic output capacitors smaller than 4.7µF?

Yes - the datasheet confirms stability with ≥1µF ceramic capacitors due to internal compensation. While 4.7µF is recommended for optimal transient response at 3A, 1µF is sufficient for basic regulation. ESR is irrelevant for ceramic caps, eliminating stability concerns common with older LDOs.

How does the PGOOD pin behave during thermal shutdown?

PGOOD goes low immediately upon thermal shutdown activation and remains low until VOUT recovers to ≥90% of target *and* junction temperature falls below the hysteresis threshold (120°C). The 160µs delay applies only during initial startup - fault recovery is immediate once conditions normalize.

Can the feedback resistor divider be omitted to use MP2030DQ-LF-P as a fixed-output regulator?

No - MP2030DQ-LF-P has no factory-trimmed fixed output. The FB pin must be connected to a resistive divider between OUT and GND to set VOUT = 0.5 × (R1 + R2)/R2. Omitting the divider leaves FB floating, causing undefined regulation and potential damage.