Monolithic Power Systems Inc. MP2002DD-LF-Z

Overview

MP2002DD-LF-Z from Monolithic Power Systems is a low-dropout linear regulator with adjustable 0.5V–5V output, 500mA load capability, 300mV dropout at full load, and 0.5V feedback reference. It operates from 1.35V–6.5V input, features power-good open-collector output and enable control, and targets ultra-low-voltage battery-powered RF subsystems in cellular handsets.

For engineers reviewing the MP2002DD-LF-Z datasheet, MP2002DD-LF-Z pinout, MP2002DD-LF-Z application, or MP2002DD-LF-Z equivalent, key selection criteria include its sub-1.4V minimum input operation, 2% reference accuracy, thermal/current protection, and compatibility with small ceramic capacitors in space-constrained portable designs.

Technical Context

The MP2002 uses a PNP pass transistor architecture to achieve ultra-low dropout (290mV typ. at 500mA) while maintaining stability with ≥2.2µF input and ≥4.7µF output ceramic capacitors. Its 0.5V internal reference enables precise output setting via external resistor divider.

Power Good (PG) is an open-collector output asserting low when regulated output falls >10% below target; EN pin supports logic-level shutdown with 6µA quiescent current. Internal thermal shutdown triggers at 155°C and current limit activates at 550–730mA.

Key Specifications

Pinout & Package

MP2002DD-LF-Z is housed in an 8-pin QFN package measuring 2mm × 3mm with exposed thermal pad. The package supports high-density layout and efficient heat dissipation when soldered to a GND plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B122MR-G and RP114K121D-TR-F, MP2002DD-LF-Z uniquely combines 500mA drive, adjustable output, EN control, and PG signaling in a 2×3mm QFN-making it suitable for compact, feature-rich portable RF subsystems where flexibility and system integration matter.

Availability

MP2002DD-LF-Z is available at Aetrix Electronics and suitable for cellular handset power management, wireless modem subsystems, pager logic rails, and low-power sensor hubs requiring stable component supply across production lifecycles.

Supply support for MP2002DD-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 global design and support infrastructure.

The MP2002 belongs to MPS's ultra-low-voltage LDO product line, engineered specifically for battery-powered RF and portable communication devices demanding sub-1.4V operation and minimal quiescent current.

FAQ

What is the minimum input voltage required for MP2002DD-LF-Z to regulate a 1.2V output?

The MP2002DD-LF-Z requires at least 1.5V input to sustain 1.2V output at full 500mA load, based on its 290mV typical dropout voltage. At lighter loads, regulation remains stable down to 1.35V input due to reduced dropout - verified per Absolute Maximum Ratings and Electrical Characteristics tables.

Can MP2002DD-LF-Z be used without the power-good (PG) pin?

Yes. The PG pin is optional and may be left unconnected if system-level power monitoring is handled elsewhere. When unused, no pull-up resistor is required. However, omitting PG forfeits early warning of output undervoltage events critical in safety- or reliability-sensitive applications.

Is the exposed thermal pad on MP2002DD-LF-Z electrically connected to GND?

Yes. Pin 6 (GND) and the exposed pad are internally shorted and must both be connected to the PCB's main GND plane. This dual connection provides low-impedance thermal and electrical return, essential for achieving rated 500mA output and preventing thermal shutdown under continuous load.

How does the MP2002DD-LF-Z handle reverse current flow when input voltage drops below output?

The MP2002DD-LF-Z contains no reverse-current blocking diode. If VIN falls below VOUT, current can flow backward from OUT to IN through the PNP pass transistor. To prevent this, place a Schottky diode (anode to IN, cathode to OUT) or use a PMOS-based ideal diode controller in series with the input rail.

Why is MP2002DD-LF-Z marked "NOT RECOMMENDED FOR NEW DESIGNS"?

This designation reflects MPS's product lifecycle status: newer alternatives like MP2013 or MPQ2013 offer improved specs (e.g., lower IQ, higher PSRR, smaller packages) and full long-term support. MP2002DD-LF-Z remains available for legacy design refreshes and existing production, but new projects should evaluate current-generation replacements.

What is the maximum allowable output capacitance for MP2002DD-LF-Z stability?

No upper limit is specified - the MP2002DD-LF-Z is stable with ceramic output capacitors ranging from 4.7µF to 100µF. Larger values improve transient response and ripple suppression but increase start-up time and inrush current; design trade-offs should consider load step requirements and inrush limitations in the host system.

Does MP2002DD-LF-Z require a specific PCB layout for thermal performance?

Yes. The exposed thermal pad must be soldered to a minimum 100mm² copper area connected to GND via ≥4 thermal vias (0.3mm diameter). Input/output capacitors must be placed within 2mm of their respective pins, and feedback traces must be short and shielded from noisy signals to maintain regulation accuracy and noise immunity.