Monolithic Power Systems Inc. MP20056GJ-25-P

Overview

MP20056GJ-25-P from Monolithic Power Systems is a low-noise, high-PSRR linear regulator delivering 250mA output with 100mV dropout at full load, fixed 2.5V output, and 150μA ground current. It operates from 2.5V to 5.5V input and integrates PMOS pass element, thermal shutdown, short-circuit protection, and enable control-designed for power-sensitive RF and portable applications such as cellular phone baseband supplies.

For engineers reviewing the MP20056GJ-25-P datasheet, MP20056GJ-25-P pinout, MP20056GJ-25-P application, or MP20056GJ-25-P equivalent, key selection criteria include its 13μVRMS noise (10Hz–100kHz), 63dB PSRR at 1kHz, ceramic-capacitor stability, 0.4V EN logic-low threshold, and TSOT23-5 package thermal resistance of 220°C/W.

Technical Context

The MP20056GJ-25-P uses an internal PMOS pass transistor enabling ultra-low dropout and sub-200μA quiescent current across load range. Its feedback loop references a precise 0.8V internal bandgap, supporting both fixed 2.5V output (via internal resistor divider) and adjustable configurations via external FB network.

Thermal protection activates at 150°C with 20°C hysteresis, while current limiting clamps short-circuit output to 350–850mA. The EN pin provides clean logic-controlled startup with 100–450μs typical rise time into 4.7μF ceramic output capacitance.

Key Specifications

Pinout & Package

MP20056GJ-25-P is housed in a RoHS-compliant TSOT23-5 package (1.6mm × 2.9mm × 1.1mm), featuring exposed pad-less construction optimized for cost-sensitive portable designs. Thermal performance relies on PCB copper area under pins rather than backside pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B252MR-G and ADP125ARHZ-2.5-R7, MP20056GJ-25-P uniquely balances ultra-low noise (13μVRMS), logic-enable capability, and 100mV dropout in a TSOT23-5 footprint-making it optimal for compact, battery-powered RF and mixed-signal systems requiring tight noise and efficiency trade-offs.

Availability

MP20056GJ-25-P is available at Aetrix Electronics and suitable for cellular phone baseband supplies, wireless LAN transceiver biasing, notebook USB-C peripheral rails, and industrial sensor signal chains requiring stable component supply with guaranteed long-term sourcing.

Supply support for MP20056GJ-25-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 and global manufacturing partnerships.

The MP20056 series belongs to MPS's low-noise LDO product line, engineered specifically for RF, portable, and precision analog applications demanding high PSRR, minimal output noise, and robust thermal behavior in space-constrained layouts.

FAQ

What is the maximum allowable input voltage for MP20056GJ-25-P?

The absolute maximum input voltage is +6V relative to GND, but recommended operating range is 2.5V to 5.5V. Exceeding 5.5V risks permanent damage even briefly, and operation above 6V violates absolute maximum ratings per datasheet Rev.1.12 Section 4.

Can MP20056GJ-25-P be used with a 1μF output capacitor?

No-MP20056GJ-25-P requires minimum 4.7μF ceramic output capacitance for guaranteed stability. Using 1μF violates the stability condition and may cause oscillation or poor transient response, as confirmed in Section 8.3 of the datasheet.

Does MP20056GJ-25-P support adjustable output voltage?

No-MP20056GJ-25-P is factory-trimmed for fixed 2.5V output. While the FB pin is physically present, it connects internally to the fixed divider; external resistor networks will not alter output voltage and are not supported per datasheet Section 7.1.

What is the thermal shutdown hysteresis of MP20056GJ-25-P?

Thermal shutdown activates at 150°C junction temperature and resets at 130°C, yielding a 20°C hysteresis. This behavior is specified in Electrical Characteristics Table (Note 9) and ensures reliable recovery after overheating without cycling.

Is the EN pin internally pulled up or down?

The EN pin has no internal pull-up or pull-down; it is high-impedance. Leaving it unconnected causes undefined operation-datasheet Section 6 explicitly states "Do not float the EN pin" and recommends tying to VIN or a controlled GPIO.

How does reverse voltage protection work on MP20056GJ-25-P?

MP20056GJ-25-P lacks internal reverse-voltage protection. Its PMOS pass element contains a body diode that conducts from OUT to IN if VOUT > VIN, risking damage. External Schottky diode in series with IN is required in backup-battery or hot-swap scenarios per Application Information Section 13.

What is the typical startup time for MP20056GJ-25-P?

Startup time is 100–450μs (10% to 90% of nominal output) with 4.7μF output capacitor, varying by output voltage: 100–300μs for 1.8V, 100–450μs for 2.5V and 3.3V. This is measured under VIN=5.5V, TJ=25°C per Electrical Characteristics table.