Monolithic Power Systems Inc. MP8802DJ-2.85-LF-P

Overview

MP8802DJ-2.85-LF-P from Monolithic Power Systems is a fixed-output, low-noise, low-dropout linear regulator delivering 2.85V at up to 250mA with ±2% output voltage accuracy, 250mV dropout at full load, and 70dB PSRR at 1kHz. It operates from 2.7V to 6.5V input and integrates thermal shutdown protection. It powers noise-sensitive RF and audio blocks in mobile handsets and 802.11 PC Cards.

For engineers reviewing the MP8802DJ-2.85-LF-P datasheet, MP8802DJ-2.85-LF-P pinout, MP8802DJ-2.85-LF-P application, or MP8802DJ-2.85-LF-P equivalent, key selection criteria include dropout voltage under 250mA load, PSRR performance at 1MHz, ground current stability across load, thermal shutdown threshold, and compatibility with low-ESR ceramic output capacitors.

Technical Context

The MP8802DJ-2.85-LF-P uses a PMOS pass transistor architecture enabling ultra-low dropout (250mV @ 250mA) and high PSRR (70dB @ 1kHz, 30dB @ 1MHz). Its internal 1.222V bandgap reference feeds a precision feedback loop that maintains ±2% output accuracy over –40°C to +85°C ambient temperature.

It features active enable control (EN pin), thermal shutdown at 155°C with 30°C hysteresis, and stable operation with ≥2.2μF low-ESR ceramic output capacitance. Ground current remains tightly regulated at 125–155μA across full load range, supporting battery-powered systems requiring low quiescent power.

Key Specifications

Pinout & Package

MP8802DJ-2.85-LF-P is housed in a 5-pin TSOT23-5 package (JEDEC MO-193, 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 XC6206P282MR and ADP121-AUJZ-2.85-R7, MP8802DJ-2.85-LF-P uniquely balances 250mA capability, 250mV dropout, and 70dB PSRR at 1kHz-making it optimal for RF/analog coexistence in space-limited mobile platforms where both current and noise rejection are simultaneously critical.

Availability

MP8802DJ-2.85-LF-P is available at Aetrix Electronics and suitable for mobile handset RF power, 802.11 PC Card audio subsystems, Bluetooth headset microphone biasing, and industrial sensor signal chains requiring stable component supply with guaranteed long-term continuity.

Supply support for MP8802DJ-2.85-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 mixed-signal ICs for power management, motor drive, and interface applications.

The MP8802 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for noise-critical analog power domains in wireless communications and portable audio systems.

FAQ

What is the recommended input and output capacitor configuration for MP8802DJ-2.85-LF-P?

Use a minimum 1μF X5R/X7R ceramic capacitor between IN and GND, placed within 2mm of Pin 1. For the output, a 2.2μF low-ESR ceramic capacitor (X5R/X7R, ≤100mΩ ESR) is required between OUT and GND, located adjacent to Pin 5. These values ensure stability, transient response, and PSRR performance per the datasheet's validated layout.

Can MP8802DJ-2.85-LF-P be used in adjustable-output mode?

No-MP8802DJ-2.85-LF-P is a factory-trimmed fixed-output variant. Its internal resistor divider sets 2.85V permanently; the FB pin is not functional in this version and must remain unconnected. For adjustable operation, select MP8802DN or MP8802DJ-X.X with external R1/R2.

What is the thermal shutdown behavior under continuous overload?

When junction temperature reaches 155°C, the device shuts down and holds OUT low until temperature drops by ~30°C (to ~125°C), then automatically resumes regulation. This hysteresis prevents thermal cycling. Maximum continuous power dissipation is 0.57W at TA = +25°C, limited by θJA = 220°C/W in TSOT23-5.

How does EN pin operation affect startup time and sequencing?

Driving EN high (≥1.5V) enables regulation with typical startup time of 50μs. Tying EN to IN provides immediate turn-on with no delay. Driving EN low (≤0.4V) reduces shutdown current to ≤1μA, making it suitable for hardware-controlled power gating in multi-rail systems requiring precise sequencing.

Is MP8802DJ-2.85-LF-P RoHS-compliant and halogen-free?

Yes-the "-LF" suffix confirms lead-free and RoHS-compliant packaging per EU Directive 2011/65/EU. The device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and is halogen-free per IEC 61249-2-21, with bromine <900ppm and chlorine <900ppm.

What is the minimum input voltage required to maintain regulation at 250mA load?

The minimum input voltage is calculated as VOUT + VDROPOUT = 2.85V + 0.25V = 3.10V. Below this, output voltage sags; the datasheet specifies guaranteed operation down to 2.7V only for lighter loads. At 250mA, VIN must exceed 3.10V to sustain 2.85V output within tolerance.

Does MP8802DJ-2.85-LF-P require an external feed-forward capacitor for stability?

No-stability is guaranteed with only the required 2.2μF output capacitor. An optional feed-forward capacitor (CBYP) between FB and OUT may be added to improve transient response in adjustable versions, but FB is unused in the fixed-output MP8802DJ-2.85-LF-P and must remain open.