Monolithic Power Systems Inc. MP20056GG-18-P

Overview

MP20056GG-18-P from Monolithic Power Systems is a low-noise, high-PSRR linear regulator delivering up to 250mA output current with 100mV dropout at full load, 150μA ground current, and fixed 1.8V output. It operates from 2.5V–5.5V input and targets power-sensitive analog/RF rails in portable electronics requiring stable, clean voltage.

For engineers reviewing the MP20056GG-18-P datasheet, MP20056GG-18-P pinout, MP20056GG-18-P application, or MP20056GG-18-P equivalent, key selection criteria include low-noise performance (13μVRMS), 63dB PSRR at 1kHz, thermal shutdown at 150°C, QFN-8 package thermal resistance (θJA = 80°C/W), and EN-controlled shutdown with 0.3μA supply current.

Technical Context

The MP20056GG-18-P uses an internal PMOS pass transistor enabling low dropout and ultra-low ground current. Its feedback loop references a precise 0.8V internal bandgap, supporting both fixed 1.8V output and adjustable configurations via external resistor divider.

It integrates protection circuitry including foldback current limiting (350–850mA short-circuit limit), thermal shutdown with 20°C hysteresis, and under-voltage lockout (UVLO threshold 1.95–2.3V). Stability is guaranteed with standard 4.7μF ceramic output capacitors.

Key Specifications

Pinout & Package

MP20056GG-18-P is housed in a thermally enhanced 2mm×2mm 8-pin QFN package with exposed thermal pad connected to GND. The package supports high-density PCB layouts and efficient heat dissipation when soldered to a solid ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, 250mA LDO applications.

Compared with XC6210B182MR-G and ADP125ARHZ-1.8-R7, MP20056GG-18-P uniquely balances ultra-low noise (13μVRMS), low dropout (100mV), and QFN-8 thermal efficiency (θJA = 80°C/W), making it optimal for compact, battery-powered RF and precision analog systems.

Availability

MP20056GG-18-P is available at Aetrix Electronics and suitable for notebook computers, wireless communication equipment, and handheld instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP20056GG-18-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 across Asia and North America.

The MP20056 belongs to MPS's low-noise LDO product line, engineered specifically for noise-sensitive applications in portable and wireless electronics where PSRR, dropout, and quiescent current are critical.

FAQ

What is the minimum input voltage required for MP20056GG-18-P to maintain regulation at 250mA?

The device maintains 1.8V output within specification down to VIN = VOUT + dropout = 1.8V + 0.1V = 1.9V. Absolute minimum input is 2.5V per recommended operating conditions, but functional regulation begins at 1.9V with reduced margin against UVLO activation (1.95V typical turn-on threshold).

Can MP20056GG-18-P be used with an output capacitor smaller than 4.7μF?

No-stability is guaranteed only with ≥4.7μF ceramic output capacitance (X5R/X7R, 6.3V rating). Using smaller values risks oscillation or degraded transient response, as confirmed by MPS's AC stability analysis and layout guidelines in Rev.1.12 datasheet Figure 10.

Is the exposed thermal pad on MP20056GG-18-P electrically connected to any internal node?

Yes-the exposed pad is internally connected to GND and must be soldered to a PCB ground plane. Thermal resistance (θJA = 80°C/W) and safe operating area depend entirely on this connection; omitting it raises junction temperature by >40°C at 250mA.

Does MP20056GG-18-P support adjustable output voltage?

No-MP20056GG-18-P is factory-trimmed for fixed 1.8V output. Adjustable versions (e.g., MP20056GJ) use the FB pin; this variant ties FB internally to VOUT, disabling external resistor divider configuration.

What happens if the EN pin is left floating?

Leaving EN floating violates absolute maximum ratings and may cause unpredictable startup behavior or latch-up. The datasheet explicitly states "Do not float the EN pin." Tie to VIN for always-on operation or drive actively with a GPIO to ensure deterministic enable/disable control.

How does MP20056GG-18-P handle reverse voltage conditions?

The internal PMOS pass element contains a body diode that conducts from VOUT to VIN if output voltage exceeds input (e.g., backup battery scenario). This uncontrolled reverse current can damage the IC; MPS recommends adding an external Schottky diode in series with VIN to block reverse conduction.

What is the thermal shutdown hysteresis, and why does it matter?

Thermal shutdown activates at 150°C and resets at 130°C (20°C hysteresis). This prevents rapid cycling near the trip point during marginal thermal conditions, ensuring stable recovery and avoiding firmware crashes caused by repeated regulator toggling.