Monolithic Power Systems Inc. MP8802DJ-3.3-LF-Z

Overview

MP8802DJ-3.3-LF-Z from Monolithic Power Systems is a fixed-output 3.3V, 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-3.3-LF-Z datasheet, MP8802DJ-3.3-LF-Z pinout, MP8802DJ-3.3-LF-Z application, or MP8802DJ-3.3-LF-Z equivalent, key selection criteria include dropout voltage under 250mA load, PSRR performance at 1MHz, ground current stability across load, thermal protection threshold, and compatibility with low-ESR ceramic output capacitors.

Technical Context

The MP8802DJ-3.3-LF-Z uses a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR. Its internal 1.222V bandgap reference feeds a precision feedback loop that maintains ±2% output regulation over line, load, and temperature (–40°C to +85°C).

It integrates an enable-controlled startup sequence (EN pin logic-high active), thermal shutdown at 155°C with 30°C hysteresis, and stable operation with ≥1μF ceramic output capacitance-no external compensation required for fixed-output configuration.

Key Specifications

Pinout & Package

MP8802DJ-3.3-LF-Z is housed in a 5-pin TSOT23-5 package (2.9mm × 1.6mm × 0.87mm height), optimized for space-constrained portable designs and thermally efficient PCB layout with exposed pad grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6206P332MR and AP2202K-3.3, MP8802DJ-3.3-LF-Z uniquely balances 250mA capability, sub-250mV dropout, and 70dB PSRR-making it optimal for RF and audio analog rails where both noise and headroom are constrained.

Availability

MP8802DJ-3.3-LF-Z is available at Aetrix Electronics and suitable for mobile handset PLL power, 802.11 PC card core supply, and audio codec bias rail applications requiring stable component supply, RoHS-compliant packaging, and tape-and-reel delivery.

Supply support for MP8802DJ-3.3-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 core expertise in DC/DC conversion, LDO regulation, and motor drivers.

The MP8802 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for noise-sensitive analog subsystems in wireless communications and portable audio-emphasizing PSRR, dropout, and thermal robustness over raw current capacity.

FAQ

What is the minimum input voltage required for regulation at 3.3V output?

The MP8802DJ-3.3-LF-Z requires a minimum input voltage of 3.53V to maintain regulation at 250mA load, based on its 230mV dropout specification. At lighter loads, input can drop as low as 3.33V (100mV dropout), but full-load operation mandates ≥3.53V for guaranteed 3.3V ±2% output.

Can the MP8802DJ-3.3-LF-Z be used with ceramic output capacitors?

Yes-it is explicitly designed for stability with ≥1μF X5R or X7R ceramic capacitors on the OUT pin. No ESR requirements or external compensation are needed, simplifying layout and eliminating reliance on higher-cost tantalum or aluminum electrolytic capacitors.

Does the FB pin require external components in fixed-output configuration?

No-the FB pin is internally connected to the precision 1.222V reference and does not require external resistors in the MP8802DJ-3.3-LF-Z variant. It remains electrically accessible for pin compatibility with adjustable versions but is functionally inactive in this fixed-output part.

What is the thermal shutdown behavior under continuous overload?

When junction temperature reaches 155°C, the device shuts down and remains off until temperature drops by ~30°C (to ~125°C), at which point it automatically resumes regulation. This hysteresis prevents thermal cycling and supports safe, self-recovering fault handling without external intervention.

How does PSRR performance change with frequency?

PSRR is frequency-dependent: 70dB at 1kHz, dropping to 30dB at 1MHz. This reflects the regulator's ability to reject mid-frequency switching noise (e.g., from 1MHz buck converters) while remaining effective against lower-frequency ripple and supply variations.

Is the EN pin compatible with standard CMOS logic levels?

Yes-EN has a 1.5V logic-high threshold and 0.4V logic-low threshold, making it fully compatible with 1.8V, 3.3V, and 5V CMOS I/O. Pulling EN to IN enables automatic startup; driving it low with a microcontroller GPIO achieves precise power sequencing control.

What is the maximum allowable power dissipation at 25°C ambient?

With θJA = 220°C/W for the TSOT23-5 package, maximum continuous power dissipation at TA = 25°C is calculated as (150°C − 25°C) / 220°C/W = 568mW. At 250mA and 230mV dropout, actual dissipation is 57.5mW-well within safe limits, assuming adequate PCB copper area for heat spreading.