Monolithic Power Systems Inc. MP20056GG-33-P

Overview

MP20056GG-33-P from Monolithic Power Systems is a fixed 3.3V, 250mA low-dropout linear regulator with 100mV dropout at full load, 150μA ground current, and 13μV_RMS output noise (10Hz–100kHz). It uses an internal PMOS pass element, operates from 2.5V to 5.5V input, and is optimized for battery-powered wireless transceivers and portable instrumentation requiring high PSRR (63dB @1kHz) and ceramic-capacitor stability.

For engineers reviewing the MP20056GG-33-P datasheet, MP20056GG-33-P pinout, MP20056GG-33-P application, or MP20056GG-33-P equivalent, key selection criteria include low-noise regulation for RF-sensitive rails, thermal shutdown behavior at 150°C, EN pin logic thresholds (1.5V high / 0.4V low), and QFN-8 package thermal resistance (θ_JA = 80°C/W).

Technical Context

The MP20056GG-33-P implements a PMOS-based LDO architecture with feedback control referenced to a precise 0.8V internal bandgap. Its low 100mV dropout enables operation with minimal headroom-e.g., delivering 3.3V from a 3.7V Li-ion cell under 250mA load. The regulator integrates enable logic, current limiting (350–850mA short-circuit limit), and thermal shutdown with 20°C hysteresis.

It achieves 63dB PSRR at 1kHz and 13μV_RMS integrated noise by combining low-noise biasing, optimized error amplifier design, and inherent immunity of the PMOS pass device to gate-induced noise. Stability is guaranteed with ≥4.7μF ceramic output capacitance without ESR requirements.

Key Specifications

Pinout & Package

MP20056GG-33-P is housed in a thermally enhanced 2mm×2mm 8-pin QFN package with exposed thermal pad (connected to GND). The package supports 1.6W continuous power dissipation at T_A = 25°C and requires PCB land pattern per JEDEC MO-229 VCCD-3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with XC6210B332MR-G and ADP125ARHZ-3.3-R7, MP20056GG-33-P uniquely balances 250mA capability, ultra-low 13μV_RMS noise, and 100mV dropout in a thermally efficient QFN-8-making it optimal for space-constrained, RF-critical portable designs where both efficiency and signal integrity are non-negotiable.

Availability

MP20056GG-33-P is available at Aetrix Electronics and suitable for notebook computers, wireless communication equipment, and handheld instruments requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.

Supply support for MP20056GG-33-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 MP20056 belongs to MPS's low-noise, high-PSRR LDO product line, engineered specifically for powering noise-sensitive RF, precision analog, and battery-operated subsystems in portable and wireless infrastructure equipment.

FAQ

What is the minimum input voltage required for MP20056GG-33-P to maintain regulation?

The MP20056GG-33-P maintains 3.3V output regulation down to an input voltage of 3.4V under 250mA load, based on its 100mV dropout specification. Below 3.4V, output voltage drops linearly with input; UVLO activates at VIN < 1.95V (rising), preventing erratic behavior during brownout conditions.

Can MP20056GG-33-P be used with a 1μF output capacitor?

No-MP20056GG-33-P requires ≥4.7μF ceramic output capacitance for guaranteed stability per datasheet specifications. Using 1μF violates the minimum capacitance requirement and may cause oscillation or poor transient response, especially under load steps exceeding 50mA/μs.

Is the FB pin functional in the MP20056GG-33-P variant?

No-the FB pin is internally connected to the fixed 3.3V resistor divider and is not user-accessible for adjustment. Datasheet Figure 3 confirms FB is left floating in fixed-output QFN-8 applications; connecting external components to FB may disrupt regulation or damage the internal feedback network.

How does thermal shutdown behave during continuous overload?

When junction temperature exceeds 150°C, MP20056GG-33-P disables the PMOS pass device and holds output at 0V until temperature falls to 130°C (20°C hysteresis), then resumes regulation. This cycle repeats autonomously-no external reset or EN toggling is needed, but sustained cycling indicates inadequate heatsinking or excessive power dissipation.

Does MP20056GG-33-P support reverse-voltage protection?

No-the internal PMOS body diode conducts from OUT to IN if output voltage exceeds input (e.g., backup battery scenario), allowing uncontrolled reverse current that can damage the IC. An external Schottky diode in series with VIN is mandatory in such configurations to block reverse conduction.

What is the recommended PCB layout for the exposed thermal pad?

The exposed pad (Pin 1 + bottom paddle) must be soldered to a solid copper ground plane covering ≥80% of the pad area, using ≥4 thermal vias (0.3mm diameter) filled with solder and connected to inner-layer ground planes. This ensures θ_JA remains near 80°C/W and prevents thermal derating above 125°C junction temperature.