Monolithic Power Systems Inc. MP20056GJ-33-Z

Overview

MP20056GJ-33-Z from Monolithic Power Systems is a low-noise, high-PSRR 250mA linear regulator in TSOT23-5 package with fixed 3.3V output, 100mV dropout at full load, 150μA ground current, and 13μV_RMS output noise (10Hz–100kHz). It serves as a precision post-regulator for RF transceivers and microcontroller core supplies in space-constrained portable electronics.

For engineers reviewing the MP20056GJ-33-Z datasheet, MP20056GJ-33-Z pinout, MP20056GJ-33-Z application, or MP20056GJ-33-Z equivalent, key selection criteria include its 63dB PSRR at 1kHz, thermal shutdown at 150°C, EN pin logic thresholds (1.5V high / 0.4V low), and compatibility with 4.7μF ceramic output capacitors without external compensation.

Technical Context

The MP20056GJ-33-Z uses an internal PMOS pass transistor to achieve ultra-low dropout (100mV @ 250mA) and minimal ground current (150μA @ light load). Its feedback architecture references a precise 0.8V internal bandgap, enabling stable regulation across input voltages from 2.5V to 5.5V.

It integrates short-circuit protection with 350–850mA current limiting, thermal shutdown with 20°C hysteresis, and low-noise design optimized for sensitive analog/RF stages. The TSOT23-5 package's thermal resistance (θ_JA = 220°C/W) requires careful PCB layout with GND plane connection via the exposed pad for reliable 250mA operation.

Key Specifications

Pinout & Package

MP20056GJ-33-Z is housed in a 5-pin TSOT23-5 package (2.9mm × 1.6mm × 1.1mm) with exposed thermal pad connected internally to GND. The compact footprint suits high-density PCB layouts in handheld and wearable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B332MR-G and ADP125ARHZ-3.3-R7, MP20056GJ-33-Z delivers superior noise/PSRR trade-offs and tighter dropout-making it optimal for RF and battery-constrained applications where 250mA suffices.

Availability

MP20056GJ-33-Z is available at Aetrix Electronics and suitable for wireless transceivers, portable medical sensors, industrial handheld terminals, and battery-powered microcontroller systems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for MP20056GJ-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 series targets ultra-low-noise, high-PSRR linear regulation for portable and RF-intensive applications-emphasizing battery efficiency, small footprint, and robust protection in consumer and industrial edge devices.

FAQ

What is the minimum input voltage required for MP20056GJ-33-Z to maintain regulated 3.3V output?

The MP20056GJ-33-Z requires a minimum input voltage of 3.4V to sustain 3.3V output at 250mA load, based on its 100mV dropout specification. Below this, output voltage drops linearly with input; under-voltage lockout activates at VIN < 1.95V (rising threshold).

Can MP20056GJ-33-Z be used with a 10μF ceramic output capacitor instead of the recommended 4.7μF?

Yes-using a 10μF X5R/X7R ceramic capacitor improves load transient response and further reduces output ripple, provided the capacitor's DC bias derating maintains ≥4.7μF effective capacitance at 3.3V bias. No stability issues occur within the MP20056's specified ESR range.

Does MP20056GJ-33-Z require an external resistor divider for 3.3V operation?

No-the MP20056GJ-33-Z has the output voltage factory-trimmed to 3.3V using an internal resistor divider. The FB pin is internally connected and does not require external components; it remains accessible only for potential reconfiguration in adjustable variants.

How does the EN pin behave during power-up, and what happens if left unconnected?

The EN pin defaults to OFF state if left floating due to internal pull-down. To ensure reliable startup, drive EN ≥1.5V (e.g., tie to VIN) before applying input voltage. Floating EN risks erratic enable behavior and unintended shutdown during transients.

What is the maximum allowable power dissipation for MP20056GJ-33-Z in a standard 4-layer PCB layout?

At TA = 25°C, the TSOT23-5 package's θ_JA = 220°C/W limits continuous power dissipation to 327mW ((150°C − 25°C)/220°C/W). For sustained 250mA operation at 3.3V output, keep VIN ≤ 4.35V to stay within this limit and avoid thermal shutdown.

Is reverse voltage protection required when MP20056GJ-33-Z powers a backup battery circuit?

Yes-if the output can exceed the input (e.g., backup battery holds VOUT while VIN is disconnected), the internal PMOS body diode conducts reverse current with no current limit. An external Schottky diode (anode to IN, cathode to VIN supply) is mandatory to prevent device damage.