Monolithic Power Systems Inc. MP8802DJ-2.5-LF-P

Overview

MP8802DJ-2.5-LF-P from Monolithic Power Systems is a fixed-output 2.5V, 250mA low-dropout linear regulator with 2% output accuracy, 250mV dropout at full load, and 70dB PSRR at 1kHz. It operates from 2.7V to 6.5V input, features thermal shutdown, and targets noise-sensitive analog rails such as mobile handset PLL power supplies.

For engineers reviewing the MP8802DJ-2.5-LF-P datasheet, MP8802DJ-2.5-LF-P pinout, MP8802DJ-2.5-LF-P application, or MP8802DJ-2.5-LF-P equivalent, key selection criteria include dropout voltage under 250mA load, PSRR performance at 1MHz, ground current stability across load, FB reference voltage tolerance, and TSOT23-5 thermal resistance for compact portable designs.

Technical Context

The MP8802DJ-2.5-LF-P uses a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR without requiring external compensation. Its internal 1.222V bandgap reference feeds a precision feedback loop that maintains ±2% output regulation across temperature and line/load variations.

Thermal protection activates at 155°C with 30°C hysteresis, and the device remains stable with low-ESR ceramic capacitors ≥2.2μF. Shutdown current is ≤1μA when EN is pulled low, supporting battery-powered systems requiring low quiescent power management.

Key Specifications

Pinout & Package

MP8802DJ-2.5-LF-P is housed in a 5-pin TSOT23-5 package (2.9mm × 1.6mm × 0.87mm), optimized for space-constrained portable applications. The exposed pad is not electrically connected but aids thermal dissipation when soldered to PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B252MR-G and RT9193-25GB, MP8802DJ-2.5-LF-P delivers superior PSRR and tighter output accuracy at full load, making it optimal for RF and high-fidelity audio where noise coupling directly impacts system-level performance metrics.

Availability

MP8802DJ-2.5-LF-P is available at Aetrix Electronics and suitable for mobile handset PLL power, 802.11 PC card analog rails, and audio codec bias supplies requiring stable component supply across extended production cycles.

Supply support for MP8802DJ-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.

The MP8802 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for RF and audio subsystems where power supply noise directly degrades signal fidelity and phase stability.

FAQ

What is the minimum input voltage required to maintain 2.5V output at 250mA?

The MP8802DJ-2.5-LF-P requires a minimum input voltage of 2.75V to sustain regulation at full 250mA load, based on its 250mV dropout specification. Below this, output voltage collapses linearly with input; operation below 2.7V is outside guaranteed operating conditions.

Can the MP8802DJ-2.5-LF-P be used with ceramic output capacitors?

Yes - the device is explicitly designed for stability with low-ESR ceramic capacitors ≥2.2μF, eliminating the need for bulkier tantalum or aluminum electrolytic types. X5R and X7R dielectrics are recommended for consistent performance across temperature.

Is the EN pin internally pulled up or does it require external bias?

The EN pin has no internal pull-up; it must be actively driven high (≥1.5V) to enable regulation or tied directly to the IN pin for automatic startup. Leaving EN floating may cause unpredictable behavior due to noise susceptibility.

How does thermal shutdown behave during continuous overload?

When junction temperature reaches 155°C, the device shuts down and remains off until temperature drops by ~30°C (to ~125°C), then automatically resumes operation. This hysteresis prevents rapid cycling and provides safe thermal recovery time.

What is the role of the FB pin in the fixed-output MP8802DJ-2.5-LF-P variant?

In fixed-output versions like MP8802DJ-2.5-LF-P, the FB pin is internally connected to the output divider network and is not accessible externally. It must remain unconnected - no external components should be attached to avoid disrupting regulation accuracy.

Does the MP8802DJ-2.5-LF-P support reverse polarity protection?

No - the device lacks integrated reverse-voltage protection. Applying negative voltage to IN or OUT beyond –0.3V will damage the IC. External protection diodes or MOSFET-based circuits are required if reverse polarity exposure is possible in the application.

What is the maximum allowable power dissipation at +85°C ambient?

Using θJA = 220°C/W and TJ(MAX) = 125°C, maximum continuous power dissipation at TA = +85°C is (125 – 85)/220 ≈ 182mW. Exceeding this causes thermal shutdown; derating is required for sustained high-current operation in hot environments.