Monolithic Power Systems Inc. MP20056GG-33-Z

Overview

MP20056GG-33-Z from Monolithic Power Systems is a low-noise, high-PSRR linear regulator delivering 250mA output with 100mV dropout at full load, fixed 3.3V output, and 150μA ground current. It uses an internal PMOS pass element, operates from 2.5V–5.5V input, and is optimized for noise-sensitive RF power rails in portable wireless devices.

For engineers reviewing the MP20056GG-33-Z datasheet, MP20056GG-33-Z pinout, MP20056GG-33-Z application, or MP20056GG-33-Z equivalent, key selection criteria include its 13μVRMS output noise (10Hz–100kHz), 63dB PSRR at 1kHz, ceramic-capacitor stability, thermal shutdown at 150°C, and QFN-8 (2mm×2mm) package with exposed thermal pad.

Technical Context

The MP20056GG-33-Z implements a PMOS-based LDO architecture with feedback-controlled gate drive to maintain regulation under varying load and line conditions. Its 0.8V internal reference feeds a precision error amplifier that drives the PMOS pass device, enabling fast transient response and low dropout.

It integrates enable logic with 1.5V turn-on and 0.4V turn-off thresholds, thermal foldback limiting, and short-circuit current limiting (350–850mA). The FB pin supports adjustable outputs via external resistors while maintaining 0.784–0.816V reference accuracy over temperature.

Key Specifications

Pinout & Package

MP20056GG-33-Z is housed in a thermally enhanced 2mm×2mm 8-pin QFN package with an exposed GND pad on the underside for PCB heat sinking. The package complies with JEDEC MO-229 VCCD-3 and supports reflow soldering per IPC/JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B332MR-G and RT9013-33GB, MP20056GG-33-Z uniquely balances ultra-low quiescent current (150μA), sub-100mV dropout, and QFN-8 thermal performance-making it optimal for compact, battery-constrained RF and portable medical systems where efficiency, noise, and thermal density are co-constrained.

Availability

MP20056GG-33-Z is available at Aetrix Electronics and suitable for wireless communication equipment, portable medical instrumentation, and industrial handheld instruments requiring stable component supply across long production lifecycles.

Supply support for MP20056GG-33-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 MP20056 belongs to MPS's low-noise LDO product line, engineered specifically for noise-critical power domains in portable RF, computing, and sensing applications where PSRR, dropout, and quiescent current are jointly constrained.

FAQ

What is the minimum input voltage required for MP20056GG-33-Z to regulate 3.3V output?

The absolute minimum input is 3.4V under full 250mA load due to its 100mV dropout specification. With lighter loads, input can drop further-for example, at 10mA load, dropout falls to ~30mV, allowing regulation down to ~3.33V. UVLO activates at 1.95V rising, but regulation ceases well before that threshold.

Can MP20056GG-33-Z be used with an adjustable output configuration?

No-MP20056GG-33-Z is factory-trimmed for fixed 3.3V output and lacks internal feedback resistor routing for adjustment. For adjustable operation, select MP20056GG-ADJ or MP20056GJ-ADJ variants, which expose the FB pin and omit internal divider.

Is the exposed thermal pad on the QFN-8 package electrically connected?

Yes-the exposed pad is internally bonded to GND and must be soldered to a dedicated PCB ground plane. It serves both as the primary thermal conduction path (reducing θJA by ~30°C/W) and as a low-inductance GND return for high-frequency currents.

Does MP20056GG-33-Z require an input capacitor?

Yes-a minimum 2.2μF ceramic capacitor is required between VIN and GND, placed as close as possible to pins 3 and 4. This stabilizes the input impedance, suppresses high-frequency noise from upstream converters, and prevents oscillation during fast load transients.

How does the EN pin behave during power-up sequencing?

The EN pin has no internal pull-up or pull-down; it must be actively driven. To ensure predictable startup, tie EN to VIN through a 100kΩ resistor if no external control is needed. Driving EN low before VIN ramps prevents false turn-on during brown-out conditions.

What failure modes does MP20056GG-33-Z protect against?

It provides overcurrent limiting (350–850mA short-circuit trip), thermal shutdown (150°C junction with 20°C hysteresis), and input undervoltage lockout (1.95V rising threshold). It does not include reverse-voltage or reverse-current protection-external diode is recommended if VOUT may exceed VIN.

Is MP20056GG-33-Z RoHS and REACH compliant?

Yes-MP20056GG-33-Z is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full compliance documentation is available on the MPS Quality Assurance portal.