Monolithic Power Systems Inc. MP20041DGT-SS-LF-P

Overview

MP20041DGT-SS-LF-P from Monolithic Power Systems is a dual-channel, ultra-low-noise, high-PSRR linear regulator with fixed 3.3V/3.3V outputs, 300mA per channel, 11μVRMS output noise, and 72dB PSRR at 10kHz-designed for powering sensitive RF and analog circuitry in battery-powered wireless LAN modules.

For engineers reviewing the MP20041DGT-SS-LF-P datasheet, MP20041DGT-SS-LF-P pinout, MP20041DGT-SS-LF-P application, or MP20041DGT-SS-LF-P equivalent, key selection criteria include dual independent enable control, PMOS pass element architecture enabling near-zero shutdown current (0.03–1μA), and TQFN8 package thermal performance (θJA = 80°C/W) under compact PCB area constraints.

Technical Context

The MP20041DGT-SS-LF-P integrates two independent PMOS-based LDOs with separate EN1/EN2 inputs, enabling asynchronous channel control and true zero-current shutdown when both enables are low. Each regulator features internal current limiting (525mA short-circuit limit) and thermal shutdown (140°C trip, 10°C hysteresis).

Its ultra-low 11μVRMS noise (100Hz–100kHz, no bypass capacitor required) and high PSRR (69dB @ 100Hz, 72dB @ 10kHz at 150mA load) stem from optimized error amplifier design and PMOS pass transistor characteristics-critical for powering VCOs, ADCs, and RF front-ends without external filtering.

Key Specifications

Pinout & Package

MP20041DGT-SS-LF-P is housed in a thermally enhanced 2mm × 2mm TQFN8 package with exposed thermal pad (pin 5 GND). The package supports ≤80°C/W junction-to-ambient thermal resistance on a 4-layer PCB with proper ground plane layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output LDO applications.

Compared with XC6216D332MR-G and ADP7182ACPZ-3.3-R7, MP20041DGT-SS-LF-P uniquely delivers dual 3.3V rails with matched ultra-low noise, high PSRR, and per-channel enable in a single 2mm×2mm footprint-reducing solution size by >40% versus discrete LDO pairs.

Availability

MP20041DGT-SS-LF-P is available at Aetrix Electronics and suitable for wireless LAN modules, battery-powered medical sensors, and industrial handheld scanners requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MP20041DGT-SS-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 MP20041 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for noise-sensitive RF, medical, and portable electronics where PSRR, output noise, and quiescent current are critical system-level constraints.

FAQ

What is the maximum input voltage rating for MP20041DGT-SS-LF-P?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.5V to 6.0V. Exceeding 6.5V risks permanent damage to the internal PMOS pass elements and protection circuitry, as confirmed in the Absolute Maximum Ratings table of Rev. 1.2 datasheet.

Does MP20041DGT-SS-LF-P require an external noise-bypass capacitor?

No-its 11μVRMS output noise (100Hz–100kHz) is achieved without any external bypass capacitor, as verified in Electrical Characteristics Table (page 4) and Typical Performance plots (page 6). Adding one provides no measurable improvement and wastes PCB area.

How does the thermal shutdown behave during continuous overload?

When junction temperature reaches 140°C, both LDOs shut down; they automatically restart when temperature falls to 130°C (10°C hysteresis). This cycle repeats until overload is removed, protecting against permanent damage-per Operation section (page 8) and Absolute Maximum Ratings (page 3).

Can EN1 and EN2 be tied together for simultaneous control?

Yes-EN1 and EN2 may be connected to a common logic signal, but doing so eliminates independent channel control. The datasheet explicitly supports this configuration, and the shutdown current remains ≤1μA when both pins are pulled low (page 4, Shutdown Supply Current specification).

What is the minimum output capacitor value required for stability?

A minimum 0.47μF ceramic capacitor with ESR < 1.2Ω is required on each output, as specified in Application Information (page 9). Using smaller values risks instability and excessive load-transient overshoot, confirmed by ESR vs. Stability plot (Figure 2, page 9).

Is MP20041DGT-SS-LF-P RoHS and REACH compliant?

Yes-the "-LF" suffix denotes lead-free, halogen-free, and RoHS-compliant packaging, as stated in the Ordering Information table (page 2) and Quality Assurance section of the MPS website. All units shipped meet EU Directive 2011/65/EU and Regulation (EC) No 1907/2006.

What is the dropout voltage at full 300mA load for each channel?

At 300mA load, dropout is 220mV for OUT1 (VOUT=1.8V) and 180mV for OUT2 (VOUT=2.5V) per Electrical Characteristics table (page 4). For MP20041DGT-SS-LF-P (3.3V outputs), extrapolation from the 73mV @ 100mA spec and PMOS R_DS(on) behavior yields ~250mV-consistent with typical PMOS LDO scaling.