Monolithic Power Systems Inc. MP20056GJ-25-Z

Overview

MP20056GJ-25-Z 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 2.5V output voltage in TSOT23-5 package-designed for power-sensitive RF and portable applications including cellular baseband ICs and wireless transceivers.

For engineers reviewing the MP20056GJ-25-Z datasheet, MP20056GJ-25-Z pinout, MP20056GJ-25-Z application, or MP20056GJ-25-Z equivalent, key selection criteria include its 63dB PSRR at 1kHz, 13μVRMS noise (10Hz–100kHz), thermal shutdown at 150°C, stable operation with 4.7μF ceramic output capacitor, and enable-controlled shutdown with <0.3μA quiescent current.

Technical Context

The MP20056GJ-25-Z uses an internal PMOS pass transistor enabling ultra-low dropout (100mV @ 250mA) and minimal ground current (150μA @ light load). Its feedback architecture references a precise 0.8V internal bandgap, supporting both fixed 2.5V output and adjustable configurations via external resistor divider.

It integrates protection features including thermal shutdown with 20°C hysteresis, short-circuit current limiting (350–850mA), and input under-voltage lockout (UVLO) with 160mV hysteresis. The device operates across −40°C to +125°C junction temperature and remains stable with ceramic capacitors without requiring ESR tuning.

Key Specifications

Pinout & Package

MP20056GJ-25-Z is housed in a RoHS-compliant TSOT23-5 package (1.6mm × 2.9mm × 1.1mm), featuring an exposed pad-less construction optimized for space-constrained PCB layouts. Thermal performance relies on copper area under pins rather than backside pad connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B252MR and ADP125ARHZ-2.5-R7, MP20056GJ-25-Z uniquely balances 13μVRMS noise, 100mV dropout, integrated EN control, and thermal protection in a compact TSOT23-5 package-making it optimal for space- and noise-constrained portable RF designs where reliability under transient overload matters.

Availability

MP20056GJ-25-Z is available at Aetrix Electronics and suitable for cellular baseband power, wireless transceiver bias, portable medical sensors, and industrial data acquisition requiring stable component supply across production lifecycles.

Supply support for MP20056GJ-25-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 series belongs to MPS's low-noise LDO portfolio, engineered specifically for noise-sensitive RF and portable applications demanding high PSRR, ultra-low IQ, and robust thermal protection in miniature packages.

FAQ

What is the minimum input voltage required for MP20056GJ-25-Z to regulate 2.5V output?

The MP20056GJ-25-Z requires a minimum input voltage of 2.6V to maintain regulation, based on its 100mV dropout specification at 250mA load. Under light loads, dropout drops further-enabling operation from as low as 2.5V input with margin. UVLO activates below 1.95V to prevent unstable startup.

Can MP20056GJ-25-Z be used with an output capacitor smaller than 4.7μF?

No-MPS specifies 4.7μF ceramic (X5R/X7R) as the minimum stable output capacitance. Using smaller values risks instability, excessive overshoot during load transients, and degraded PSRR. Lower-ESR alternatives like 10μF are acceptable and improve transient response.

Does MP20056GJ-25-Z support adjustable output voltage?

Yes-the FB pin is accessible and internally referenced to 0.8V, allowing external resistor divider configuration for outputs from 0.8V to 5V. However, MP20056GJ-25-Z is factory-trimmed for fixed 2.5V; reconfiguration requires modifying the feedback network and verifying accuracy across temperature and load.

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

The EN pin has a 1.5V threshold for activation and 0.4V for deactivation, with hysteresis preventing chatter. When VIN ramps first, EN must reach 1.5V before regulation begins; tying EN to VIN ensures immediate turn-on. For controlled sequencing, drive EN after VIN stabilizes using a simple RC delay or GPIO.

Is reverse voltage protection built-in?

No-MP20056GJ-25-Z lacks reverse-input protection. Its internal PMOS body diode conducts from OUT to IN if output voltage exceeds input (e.g., backup battery scenarios), risking uncontrolled current flow and damage. An external Schottky diode in series with VIN is recommended for such use cases.

What is the thermal resistance θJA for MP20056GJ-25-Z in standard PCB layout?

The TSOT23-5 package has a typical θJA of 220°C/W on a 2-layer JEDEC-standard board (1in² copper). With 2oz copper and thermal vias to inner ground planes, θJA can improve to ~120°C/W. Maximum continuous power dissipation is 0.57W at 25°C ambient, derating linearly above that.

Does MP20056GJ-25-Z require input capacitance?

Yes-MPS recommends a minimum 2.2μF ceramic capacitor placed within 3mm of the IN pin to suppress high-frequency noise and stabilize input impedance. Larger values (e.g., 4.7μF) further reduce input ripple and improve rejection of upstream switching noise.