Monolithic Power Systems Inc. MP2009EE-4.0-LF-P

Overview

MP2009EE-4.0-LF-P from Monolithic Power Systems is an ultra-low-noise, low-dropout linear regulator delivering 4.0V output at up to 120mA with ±1% accuracy over temperature, 120mV dropout at full load, and 16µV_RMS output noise (100Hz–30kHz) without external bypass capacitor - designed for powering noise-sensitive analog circuitry in portable RF systems.

For engineers reviewing the MP2009EE-4.0-LF-P datasheet, MP2009EE-4.0-LF-P pinout, MP2009EE-4.0-LF-P application, or MP2009EE-4.0-LF-P equivalent, key selection criteria include its SC70-5 package footprint, enable-controlled shutdown, 78dB PSRR at 1kHz, compatibility with 1µF ceramic output capacitors, and thermal protection with 150°C shutdown threshold.

Technical Context

The MP2009EE-4.0-LF-P 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 achieve tight line/load regulation (0.03%/V and 0.002%/mA).

It integrates EN logic control with 0.4V logic-low threshold, thermal shutdown with 20°C hysteresis, and independent current limiting (200mA typ at 4.0V output). The internal 50pF noise-reduction structure eliminates need for external bypass capacitor while maintaining stability with 1µF ceramic C_OUT.

Key Specifications

Pinout & Package

MP2009EE-4.0-LF-P is housed in a 5-pin SC70 package (2.0mm × 1.25mm × 0.9mm), optimized for space-constrained portable designs. Thermal resistance θ_JA = 260°C/W on standard 4-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B402MR-G and ADP125ARHZ-4.0-R7, MP2009EE-4.0-LF-P uniquely balances 120mA capability, 16µV_RMS noise, SC70-5 footprint, and single 1µF capacitor stability - making it optimal for miniaturized RF and imaging systems where noise, size, and battery efficiency are co-constrained.

Availability

MP2009EE-4.0-LF-P is available at Aetrix Electronics and suitable for cellular front-end power, VCO bias supply, digital camera image sensor rails, and portable medical sensor interfaces requiring stable component supply with guaranteed long-term sourcing.

Supply support for MP2009EE-4.0-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, imaging, and precision analog applications where supply noise directly impacts system-level signal fidelity and battery runtime.

FAQ

What is the minimum input voltage required for MP2009EE-4.0-LF-P to maintain regulation?

The device requires VIN ≥ VOUT + dropout voltage. At 120mA load, dropout is 110mV, so minimum input is 4.11V. With lighter loads, dropout drops to 70mV (4.07V min), enabling operation down to end-of-life battery voltages in single-cell Li-ion systems.

Can MP2009EE-4.0-LF-P be used without an output capacitor?

No - a minimum 1µF ceramic capacitor with ESR < 3Ω is required for stability across all load conditions. Omitting it causes oscillation and output voltage collapse, as confirmed by stability testing in the datasheet's "Region of Stable COUT ESR vs. Load Current" plot.

Does the NC pin require PCB routing or grounding?

No - Pin 4 is internally unconnected. It must remain unconnected on the PCB; neither routing nor grounding is permitted, as doing so may introduce parasitic coupling or violate package mechanical integrity per MPS design guidelines.

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

EN has no internal pull-up or pull-down. If left floating, the device enters undefined state and may oscillate or fail to start. For reliable power-up, tie EN directly to VIN or use a dedicated GPIO with controlled rise time - never leave it open.

Is MP2009EE-4.0-LF-P RoHS-compliant and lead-free?

Yes - the "-LF" suffix explicitly denotes lead-free, RoHS-compliant construction. All MP2009 variants meet EU RoHS Directive 2011/65/EU and are halogen-free per IEC 61249-2-21, verified by MPS material declarations and third-party lab reports.

What thermal derating applies above 25°C ambient?

Maximum power dissipation decreases linearly: PD(MAX) = (125°C − TA)/260°C/W. At 70°C ambient, max dissipation drops to 212mW - corresponding to ~177mA at 4.0V output, well above the 120mA rating, ensuring safe operation without forced cooling.

How does PSRR change with load current?

PSRR remains stable across load - 78dB at 1kHz is specified at 10mA, and typical curves show <2dB variation from 1mA to 120mA. This consistency ensures predictable noise rejection in dynamic load applications like burst-mode transceivers.