Monolithic Power Systems Inc. MP20056GJ-33-P

Overview

MP20056GJ-33-P from Monolithic Power Systems is a low-noise, high-PSRR linear regulator delivering up to 250mA output with 100mV dropout at full load, 150μA ground current, and fixed 3.3V output. It operates from 2.5V–5.5V input and integrates PMOS pass transistor, thermal shutdown, and short-circuit protection-designed for power-sensitive RF and portable applications.

For engineers reviewing the MP20056GJ-33-P datasheet, MP20056GJ-33-P pinout, MP20056GJ-33-P application, or MP20056GJ-33-P equivalent, key selection criteria include dropout voltage under 250mA load, PSRR ≥63dB at 1kHz, noise ≤35μVRMS (10Hz–100kHz), ceramic-capacitor stability, and TSOT23-5 thermal performance in space-constrained designs.

Technical Context

The MP20056GJ-33-P uses an internal PMOS pass element enabling ultra-low dropout and sub-200μA quiescent current. Its feedback loop references a precise 0.8V internal bandgap, supporting both fixed-output (3.3V) and adjustable configurations via external resistor divider.

It implements overcurrent limiting with 350–850mA short-circuit threshold and thermal shutdown at 150°C with 20°C hysteresis. EN pin logic thresholds (1.5V high / 0.4V low) enable clean digital control without floating risk.

Key Specifications

Pinout & Package

MP20056GJ-33-P is housed in a 5-pin TSOT23-5 package (2.9mm × 1.6mm × 1.0mm), featuring exposed pad-less construction optimized for low-profile portable designs. Thermal resistance θJA = 220°C/W on standard 4-layer PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B332MR-G and RT9193-33GB, MP20056GJ-33-P uniquely balances 250mA delivery, 100mV dropout, and 35μVRMS noise in TSOT23-5-making it optimal for battery-powered RF subsystems where size, efficiency, and spectral purity are jointly constrained.

Availability

MP20056GJ-33-P is available at Aetrix Electronics and suitable for wireless transceiver power, notebook subsystem rails, smartphone baseband cores, and handheld medical instruments requiring stable component supply across production lifecycles.

Supply support for MP20056GJ-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.

The MP20056 product line targets ultra-low-noise, high-PSRR LDOs for portable and RF applications-emphasizing ceramic-capacitor compatibility, minimal quiescent current, and robust thermal protection in miniature packages.

FAQ

What is the recommended input bypass capacitor for MP20056GJ-33-P?

A 2.2μF X5R or X7R ceramic capacitor placed within 2mm of the IN and GND pins is required for stability and high-frequency noise suppression. Larger values improve ripple rejection but do not substitute for proper layout and grounding.

Can MP20056GJ-33-P be used with an adjustable output configuration?

No-MP20056GJ-33-P is factory-trimmed for fixed 3.3V output. The FB pin is internally connected to OUT; using external resistors would violate the fixed-voltage configuration and void output accuracy guarantees.

Does MP20056GJ-33-P require an external diode for reverse-voltage protection?

Yes-if the output may exceed the input (e.g., backup battery scenarios), an external Schottky diode from IN to OUT is recommended. The internal PMOS body diode conducts reverse current uncontrolled, risking device damage.

What is the maximum allowable power dissipation for MP20056GJ-33-P at 85°C ambient?

Using θJA = 220°C/W and TJ(MAX) = 125°C (recommended operating limit), maximum power dissipation is (125 − 85)/220 = 0.182W. At 3.3V output and 5.5V input, this limits continuous current to ~83mA-confirm derating with actual board thermal design.

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 above 1.5V to enable regulation or below 0.4V to disable it. Leaving EN floating risks undefined startup behavior and potential shoot-through current.

Is MP20056GJ-33-P RoHS-compliant and halogen-free?

Yes-MP20056GJ-33-P meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. Lead-free matte-tin plating and green molding compound are standard; full compliance documentation is available on MPS's Quality Assurance portal.