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

Overview

MP2009EE-2.5-LF-Z from Monolithic Power Systems is an ultra-low-noise, low-dropout linear regulator delivering 2.5V at up to 120mA with ±1% output accuracy, 120mV dropout at full load, and 16µV_RMS output noise (100Hz–30kHz) without external bypass capacitor. It uses 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-Z datasheet, MP2009EE-2.5-LF-Z pinout, MP2009EE-2.5-LF-Z application, or MP2009EE-2.5-LF-Z equivalent, key selection criteria include dropout voltage under 120mA load, PSRR performance at 1kHz (78dB), ground current at light load (50µA), and stability with 1µF ceramic output capacitance.

Technical Context

The MP2009 employs a P-channel MOSFET as the pass element-eliminating base-drive current and enabling ultra-low quiescent current (50µA at no load) across input voltages and dropout conditions. Its internal 50pF noise-reduction structure achieves 16µV_RMS output noise without requiring an external bypass capacitor.

It integrates independent current limiting (130–330mA depending on V_OUT) and thermal shutdown (150°C trip, 20°C hysteresis). The EN pin provides logic-level control (0.4V low, 1.5V high), and the NC pin is unconnected-no internal connection or function.

Key Specifications

Pinout & Package

MP2009EE-2.5-LF-Z is housed in a 5-pin SC70 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for space-constrained PCB layouts and thermal performance via GND pad exposure.

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-Z uniquely balances ultra-low noise (16µV_RMS), SC70 size, and 120mA capability-making it optimal for space-constrained, noise-critical RF and imaging subsystems where every µV and mm² matters.

Availability

MP2009EE-2.5-LF-Z is available at Aetrix Electronics and suitable for cellular infrastructure monitoring units, portable medical diagnostics, and wireless sensor networks requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP2009EE-2.5-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 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for RF, sensing, and precision analog applications where supply integrity directly impacts system-level signal fidelity and battery longevity.

FAQ

Is MP2009EE-2.5-LF-Z compatible with 1.8V logic-level enable signals?

Yes. The EN pin accepts logic-high ≥1.5V and logic-low ≤0.4V at TA = 25°C, making it fully compatible with 1.8V GPIO outputs without level-shifting. At 85°C, the logic-low threshold drops to 0.3V, ensuring robust disable functionality across temperature.

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

No. Stability is guaranteed only with ≥1µF ceramic output capacitance (X5R/X7R, ESR <3Ω). Using 0.47µF risks oscillation under load transients, as confirmed by the "Region of Stable C_OUT ESR vs. Load Current" graph in the datasheet.

What is the maximum allowable power dissipation for MP2009EE-2.5-LF-Z in SC70 package at 60°C ambient?

Using θ_JA = 260°C/W and T_J(MAX) = 125°C, maximum power dissipation is (125°C − 60°C) / 260°C/W = 250mW. At 2.5V/120mA (300mW theoretical), thermal shutdown will activate unless board-level thermal relief (e.g., GND plane) reduces effective θ_JA.

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

Yes. A 1µF ceramic input capacitor is required for stability and line transient suppression. Larger values improve line regulation but increase board area; tantalum capacitors are acceptable alternatives if ceramic is unavailable.

How does the NC pin affect thermal performance or EMI in layout?

The NC pin has no internal connection and contributes no thermal or electrical function. It may be left floating, grounded, or omitted from the footprint-none affects thermal resistance or EMI. Grounding it improves mechanical rigidity but offers no electrical benefit.

What is the typical startup delay from EN assertion to regulated 2.5V output?

Typical EN startup delay is 150µs-defined as time for V_OUT to reach 90% of final value with R_LOAD = 50Ω. This delay remains consistent across input voltage (2.0V–6.0V) and temperature (-20°C to +85°C), supporting deterministic power sequencing.