Monolithic Power Systems Inc. MP2009EE-2.5-LF-P

Overview

MP2009EE-2.5-LF-P from Monolithic Power Systems is an ultra-low-noise, low-dropout linear regulator delivering 2.5V at up to 120mA output current with ±1% accuracy over temperature, 120mV dropout at full load, and 16µV_RMS output noise (100Hz–30kHz) without external bypass capacitor. It employs an internal PMOS pass element, operates from 2.0V to 6.0V input, and targets noise-sensitive analog rails in portable RF systems.

For engineers reviewing the MP2009EE-2.5-LF-P datasheet, MP2009EE-2.5-LF-P pinout, MP2009EE-2.5-LF-P application, or MP2009EE-2.5-LF-P equivalent, key selection criteria include dropout voltage under 120mA load, PSRR >75dB at 1kHz, ground current ≤50µA at no load, stability with 1µF ceramic output capacitor, and EN-controlled shutdown timing.

Technical Context

The MP2009EE-2.5-LF-P uses a P-channel MOSFET as its pass element, eliminating base-drive current and enabling ultra-low quiescent current (50µA) across load and dropout conditions. Its internal 50pF noise-reduction structure achieves 16µV_RMS output noise without external bypass capacitance.

It features active current limiting (130–330mA depending on V_OUT) and thermal shutdown at 150°C with 20°C hysteresis. The EN pin provides logic-level control (0.4V low, 1.5V high), and the NC pin is unconnected - not internally tied or functional.

Key Specifications

Pinout & Package

MP2009EE-2.5-LF-P is housed in a 5-pin SC70 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for ultra-compact layouts in handheld and wearable devices.

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, MP2009EE-2.5-LF-P uniquely balances ultra-low noise (16µV_RMS), low dropout (140mV), and minimal quiescent current (50µA) in the smallest SC70 footprint - making it optimal for space- and noise-constrained RF analog rails.

Availability

MP2009EE-2.5-LF-P is available at Aetrix Electronics and suitable for cellular front-end power, VCO bias supply, digital camera image sensor rails, and portable audio codec supply requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP2009EE-2.5-LF-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, and global manufacturing partnerships.

The MP2009 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for RF and precision analog subsystems in battery-powered portable electronics where noise, size, and efficiency are critical.

FAQ

What is the maximum allowable input voltage for MP2009EE-2.5-LF-P?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.0V to 6.0V. Exceeding 6.5V risks permanent damage due to junction breakdown. For reliable operation with margin, keep VIN ≤6.0V, especially at elevated temperatures where thermal stress compounds electrical overstress.

Can MP2009EE-2.5-LF-P operate stably with a 0.47µF output capacitor?

No - stability is guaranteed only with ≥1µF ceramic output capacitance (ESR <3Ω). Using 0.47µF violates the minimum C_OUT requirement and may cause oscillation or excessive output ripple, particularly under dynamic load conditions. Always use 1µF or higher per the datasheet.

Is the NC pin electrically isolated or internally bonded?

The NC (pin 4) is fully unconnected - no internal bond wire, no silicon connection, and no metal trace. It must remain unconnected on the PCB. Routing traces to or placing vias near this pin introduces parasitic capacitance that can degrade PSRR and noise performance.

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

The EN pin has a 150µs startup delay from logic-high assertion to 90% V_OUT. Its threshold is 1.5V min for high and 0.4V max for low. To ensure deterministic turn-on, drive EN from a clean, monotonic GPIO - avoid slow-rising or noisy control signals that could cause partial turn-on and shoot-through.

Does MP2009EE-2.5-LF-P require an input capacitor?

Yes - a minimum 1µF ceramic input capacitor is required for stability and line transient suppression. Place it within 2mm of the IN and GND pins. Larger values improve line regulation but increase board area; do not omit it, as instability or input rail collapse may occur during fast load transients.

What is the thermal shutdown hysteresis, and how does it affect system behavior?

Thermal shutdown activates at 150°C (typ) and releases at 130°C (typ), yielding 20°C hysteresis. During sustained overload, the device cycles between ON and OFF states - visible as output voltage pulsing. This protects against permanent damage but indicates inadequate heatsinking or excessive power dissipation in the design.

How does output voltage accuracy change across load and temperature?

At 25°C and 1mA load, accuracy is ±1%. Over full operating conditions (–20°C to +85°C, 100µA–80mA), it degrades to ±2%, and over full temperature and load range (–20°C to +85°C, 100µA–120mA), it is ±3%. This is specified in the Electrical Characteristics table and verified across production lots.