Monolithic Power Systems Inc. MP8801DJ-3.3-LF-Z

Overview

MP8801DJ-3.3-LF-Z from Monolithic Power Systems is a fixed-output, low-noise, low-dropout linear regulator delivering 3.3V ±2% at up to 150mA load current, with 100mV dropout at 100mA, 70dB PSRR at 1kHz, and 125μA ground current. It operates from 2.7V–6.5V input and targets noise-sensitive analog power rails such as mobile handset PLL VCO supplies.

For engineers reviewing the MP8801DJ-3.3-LF-Z datasheet, MP8801DJ-3.3-LF-Z pinout, MP8801DJ-3.3-LF-Z application, or MP8801DJ-3.3-LF-Z equivalent, key selection criteria include output accuracy over temperature, thermal shutdown threshold (155°C), enable logic compatibility (EN high ≥1.5V), low-ESR capacitor stability, and TSOT23-5 footprint constraints.

Technical Context

The MP8801DJ-3.3-LF-Z uses a PMOS pass transistor architecture enabling low dropout and high PSRR. Its internal 3.3V reference is derived from a precision 1.222V feedback threshold with ±0.025V tolerance across –40°C to +85°C.

It integrates active enable control (EN pin), thermal shutdown with 30°C hysteresis, and stable operation with 1μF–10μF ceramic output capacitors. The device does not require external compensation and supports both fixed-output and adjustable configurations via FB pin.

Key Specifications

Pinout & Package

MP8801DJ-3.3-LF-Z is housed in a TSOT23-5 package (2.9mm × 1.6mm × 0.95mm height), optimized for space-constrained portable designs. Thermal resistance θJA = 220°C/W on a 4-layer JEDEC board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B332MR-G and ADP125ARHZ-3.3-R7, MP8801DJ-3.3-LF-Z delivers superior PSRR (70dB vs ≤60dB) and lower output noise (300nV/√Hz), making it the preferred choice for RF and high-fidelity audio biasing where spectral purity is non-negotiable.

Availability

MP8801DJ-3.3-LF-Z is available at Aetrix Electronics and suitable for mobile handset PLL power, 802.11 PC card power, and audio codec power applications requiring stable component supply, RoHS-compliant packaging, and guaranteed TSOT23-5 form factor consistency.

Supply support for MP8801DJ-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 power management ICs, including DC/DC converters, LDOs, LED drivers, and motor drivers for consumer, industrial, and automotive markets.

The MP8801 product line targets ultra-low-noise, high-PSRR linear regulation in portable RF and audio subsystems, emphasizing minimal board area, thermal robustness, and compatibility with ceramic output capacitors.

FAQ

What is the minimum input voltage required for stable 3.3V output at 150mA?

The MP8801DJ-3.3-LF-Z requires a minimum input voltage of 3.45V to maintain regulation at 150mA load, based on its 150mV dropout specification at VOUT = 3V. Below this, output voltage drops linearly with input; operation below 2.7V is outside recommended conditions and may cause instability or shutdown.

Can the MP8801DJ-3.3-LF-Z be used in adjustable-output mode?

Yes - although configured as a 3.3V fixed-output device, the FB pin remains accessible and functional. By disconnecting the internal feedback network and connecting an external resistor divider between OUT and FB, the output can be adjusted from 1.25V to 5V using the formula VOUT = 1.222V × (1 + R1/R2), with R2 = 10kΩ recommended for accuracy.

Is a feed-forward capacitor required for stability?

No - the MP8801DJ-3.3-LF-Z is unconditionally stable with standard 1μF–10μF ceramic output capacitors and does not require a feed-forward capacitor. However, adding a 100nF ceramic capacitor in parallel with R1 (in adjustable mode) improves load transient response without affecting stability.

What is the thermal shutdown hysteresis, and how does it affect recovery?

The thermal shutdown activates at 155°C junction temperature and releases hysteresis at 125°C (30°C difference). After shutdown, the device remains off until die temperature falls below 125°C, preventing rapid cycling during sustained overload or inadequate heatsinking.

Does the EN pin support partial enable functionality or only on/off control?

The EN pin provides binary on/off control only: logic high (≥1.5V) enables regulation; logic low (≤0.4V) places the device in shutdown with <1μA quiescent current. There is no intermediate or analog control mode - EN is not intended for PWM dimming or soft-start modulation.

How does load regulation performance compare across temperature?

Load regulation remains ≤0.001%/mA from –40°C to +85°C, verified by characterization data. This consistency ensures output voltage deviation stays below 0.15mV across the full 0–150mA load range regardless of ambient temperature, critical for precision analog subsystems.

What is the maximum allowable power dissipation at 70°C ambient?

Using θJA = 220°C/W and TJ(MAX) = 125°C, maximum continuous power dissipation at TA = 70°C is PD(MAX) = (125°C − 70°C) / 220°C/W ≈ 250mW. Exceeding this risks thermal shutdown; actual safe dissipation depends on PCB copper area and airflow.