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

Overview

MP8801DJ-3.3-LF-P 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 150mV dropout at 150mA, 70dB PSRR at 1kHz, and 125μA ground current. It operates from 2.7V–6.5V input and targets noise-sensitive analog rails such as mobile handset PLL VCO supplies and audio codec power.

For engineers reviewing the MP8801DJ-3.3-LF-P datasheet, MP8801DJ-3.3-LF-P pinout, MP8801DJ-3.3-LF-P application, or MP8801DJ-3.3-LF-P equivalent, key selection criteria include output accuracy over temperature, PSRR performance at RF frequencies, thermal shutdown threshold (155°C), dropout behavior under full load, and compatibility with low-ESR ceramic output capacitors.

Technical Context

The MP8801DJ-3.3-LF-P uses a PMOS pass transistor architecture enabling low dropout and high PSRR without requiring an external bias supply. Its internal 3.3V reference is trimmed to ±2% across –40°C to +85°C, and feedback is referenced to a precise 1.222V FB threshold for adjustable configurations.

Thermal shutdown activates at 155°C with 30°C hysteresis, and the EN pin supports logic-level enable/disable control with <1μA shutdown current. Stability is guaranteed with 1μF–10μF X5R/X7R ceramic output capacitors, eliminating need for tantalum or electrolytic types.

Key Specifications

Pinout & Package

MP8801DJ-3.3-LF-P is housed in a TSOT23-5 package (2.9mm × 1.6mm × 1.0mm height), optimized for space-constrained portable designs and thermally enhanced via exposed pad connection to PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B332MR-G and RT9193-33GB, MP8801DJ-3.3-LF-P uniquely balances 150mA drive, ultra-low 300nV/√Hz noise, and 70dB/30dB PSRR across 1kHz/1MHz - making it optimal for co-located RF/analog SoC power where spectral purity is non-negotiable.

Availability

MP8801DJ-3.3-LF-P 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 traceable lot-level sourcing.

Supply support for MP8801DJ-3.3-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 power management ICs, including DC/DC converters, LDOs, LED drivers, and motor drivers, with design centers in the US, China, and Taiwan.

The MP8801 series belongs to MPS's low-noise LDO product line, engineered specifically for noise-critical analog and RF subsystems in portable wireless devices where PSRR, output noise, and thermal reliability are primary design constraints.

FAQ

What is the maximum allowable input voltage for MP8801DJ-3.3-LF-P?

The absolute maximum input voltage is +7V, but the recommended operating range is 2.7V to 6.5V. Exceeding 6.5V risks violating safe operating area limits even if within absolute max ratings, especially under thermal stress or high load current.

Can MP8801DJ-3.3-LF-P be used in adjustable-output configuration?

Yes - although configured as 3.3V fixed, the FB pin remains accessible. By disconnecting the internal divider and connecting an external R1/R2 network (with R2 = 10kΩ ±1%), output can be set from 1.25V to 5V per VOUT = 1.222V × (1 + R1/R2).

Does MP8801DJ-3.3-LF-P require an external feed-forward capacitor?

No - the feed-forward capacitor across R1 is optional and improves transient response only for adjustable configurations. In fixed 3.3V mode, stability is ensured with ≥1μF ceramic output capacitance and no additional components needed.

What is the thermal shutdown hysteresis and why does it matter?

Thermal shutdown triggers at 155°C with 30°C hysteresis (re-enables at ~125°C). This prevents rapid on/off cycling during sustained overload, allowing safe cooldown before resuming regulation - critical for reliability in sealed handheld enclosures.

Is the TSOT23-5 package lead-free and RoHS-compliant?

Yes - the "-LF" suffix confirms lead-free, halogen-free, and RoHS-compliant construction. The device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per IPC/JEDEC J-STD-020.

How does load regulation performance impact audio codec applications?

With better than 0.001%/mA load regulation, output voltage deviation remains under 150μV across full 0–150mA load swing - preserving ADC reference stability and preventing gain error or distortion in high-resolution audio paths.

What PCB layout practices maximize PSRR and noise performance?

Place 1μF input and output ceramic capacitors within 2mm of respective pins; route FB trace short and away from noisy signals; connect GND pin directly to solid ground plane; and use thermal vias under the exposed pad to enhance heat dissipation and reduce thermal impedance.