Monolithic Power Systems Inc. MP2009EE-3.3-LF-Z

Overview

MP2009EE-3.3-LF-Z from Monolithic Power Systems is an ultra-low-noise, low-dropout linear regulator delivering 3.3V ±1% output with 120mA continuous current, 120mV dropout at full load, 16µV_RMS output noise (100Hz–30kHz), and 78dB PSRR at 1kHz - designed for powering noise-sensitive analog circuitry in battery-powered RF systems.

For engineers reviewing the MP2009EE-3.3-LF-Z datasheet, MP2009EE-3.3-LF-Z pinout, MP2009EE-3.3-LF-Z application, or MP2009EE-3.3-LF-Z equivalent, key selection criteria include output noise performance without bypass capacitor, SC70 package footprint constraints, enable-controlled shutdown behavior, and stability with 1µF ceramic output capacitance.

Technical Context

The MP2009EE-3.3-LF-Z uses an internal P-channel MOSFET pass element with 1.4Ω R_DS(on), enabling ultra-low quiescent current (50µA at no load) and minimal dropout voltage across its 2.0V–6.0V input range. Its bandgap reference and error amplifier architecture support tight 1% output accuracy over temperature and load.

It integrates EN-controlled logic-level shutdown (0.4V logic low threshold), thermal shutdown at 150°C with 20°C hysteresis, and current limiting (180–250mA typical at 3.3V output). No external noise bypass capacitor is required due to on-die 50pF filtering.

Key Specifications

Pinout & Package

MP2009EE-3.3-LF-Z is housed in a 5-pin SC70 package (2.0mm × 2.1mm, 0.5mm pitch), optimized for space-constrained portable designs. The NC (pin 4) must remain unconnected; GND (pin 2) requires direct connection to a low-impedance ground plane for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B332MR-G and ADP125ARHZ-3.3-R7, MP2009EE-3.3-LF-Z uniquely balances ultra-low noise, low dropout, and SC70 footprint - making it optimal for space- and noise-constrained 3.3V RF/analog rails where 120mA suffices.

Availability

MP2009EE-3.3-LF-Z is available at Aetrix Electronics and suitable for cellular front-end modules, VCO bias supplies, portable medical sensors, and Bluetooth audio DAC applications requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP2009EE-3.3-LF-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 MP2009 series belongs to MPS's ultra-low-noise LDO product line, engineered specifically for RF, precision analog, and battery-powered portable systems where noise, size, and efficiency are critical.

FAQ

What is the minimum input voltage required for MP2009EE-3.3-LF-Z to regulate at 3.3V?

The minimum input voltage is 3.42V - calculated from the 120mV dropout specification at 120mA load. At lighter loads, dropout decreases (e.g., 80mV at 80mA), allowing operation down to 3.38V. Input below 2.0V is outside absolute maximum ratings and will disable regulation.

Can MP2009EE-3.3-LF-Z operate without an output capacitor?

No - a minimum 1µF ceramic output capacitor is required for stability across all load conditions, as confirmed in the datasheet's "Stable Region" ESR vs. load current plot. Omitting C_OUT causes oscillation and output voltage collapse, even though no noise bypass capacitor is needed.

Is the NC pin (pin 4) safe to connect to ground for thermal improvement?

No - pin 4 is internally unconnected. Connecting it to ground creates a parasitic path that may degrade PSRR and increase output noise. The datasheet explicitly states "NC" and shows no internal bond wire; PCB layout must isolate this pad or omit it entirely.

How does the EN pin behave during power-up when VIN ramps slowly?

The EN pin has no internal pull-up or pull-down. If left unconnected during power-up, its voltage floats unpredictably, risking partial enablement or oscillation. The datasheet mandates tying EN to VIN (via resistor or direct) if shutdown is unused - ensuring monotonic turn-on as VIN crosses 1.5V.

What is the thermal resistance (θ_JA) of MP2009EE-3.3-LF-Z in standard PCB layout?

θ_JA is 260°C/W, measured on a JEDEC-standard 4-layer board per JESD51-7. With 120mA load and 3.8V input (250mW dissipation), junction temperature rise is ~65°C above ambient - well within the 125°C max operating limit if ambient stays ≤60°C and GND pin connects to ≥1cm² copper.

Does output voltage accuracy include line and load regulation effects?

Yes - the ±1% initial accuracy spec (at 25°C, 1mA load) is separate from line regulation (0.03%/V) and load regulation (0.002%/mA). Combined error over full operating range (-20°C to +85°C, 100µA–120mA) is ±3%, as specified in the Electrical Characteristics table under "Output Voltage Accuracy".