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

Overview

MP20041DGT-PP-LF-P from Monolithic Power Systems is a dual-channel, ultra-low-noise, high-PSRR linear regulator with 3.0V/3.0V fixed outputs, 300mA per channel, 11μVRMS output noise (no bypass capacitor required), and 72dB PSRR at 10kHz - designed for powering noise-sensitive analog and RF circuitry in portable electronics.

For engineers reviewing the MP20041DGT-PP-LF-P datasheet, MP20041DGT-PP-LF-P pinout, MP20041DGT-PP-LF-P application, or MP20041DGT-PP-LF-P equivalent, key selection criteria include dual independent enable control, PMOS pass element architecture enabling low dropout (73mV @100mA), thermal shutdown (140°C), and TQFN8 (2mm×2mm) package compatibility with space-constrained battery-powered designs.

Technical Context

The MP20041DGT-PP-LF-P integrates two independent PMOS-based LDOs with separate EN1/EN2 inputs, enabling selective channel shutdown and near-zero quiescent current (0.03–1μA) in full shutdown mode. Each regulator features internal current limiting (525mA short-circuit limit) and thermal protection with 10°C hysteresis.

Its architecture delivers fast line/load transient response using only 1μF ceramic input/output capacitors, supported by ultra-low 114μA no-load quiescent current and 73mV dropout at 100mA load - critical for maintaining regulation under dynamic battery voltage sag in handheld devices.

Key Specifications

Pinout & Package

MP20041DGT-PP-LF-P is housed in a thermally enhanced 2mm × 2mm TQFN-8 package with exposed thermal pad (GND-connected). Pin 5 is common GND; pins 4 and 6 are NC; pins 2 and 3 are independent active-high enables; pins 7 and 8 are regulated outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6216D302MR-G and RT9080L-3030, MP20041DGT-PP-LF-P uniquely combines dual independent enables, 11μVRMS noise, 72dB PSRR, and thermal hysteresis - making it optimal for compact, noise-critical, battery-sensitive dual-rail systems where reliability and signal integrity are non-negotiable.

Availability

MP20041DGT-PP-LF-P is available at Aetrix Electronics and suitable for wireless LAN transceivers, portable medical sensors, and industrial handheld scanners requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle availability.

Supply support for MP20041DGT-PP-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 power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP20041 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for powering sensitive RF, audio, and precision analog circuits in battery-constrained portable and IoT devices.

FAQ

What is the maximum allowable input voltage for MP20041DGT-PP-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 due to internal junction breakdown. For reliable operation with margin, keep VIN ≤6.0V, especially under high ambient temperature or high load conditions where power dissipation increases.

Can MP20041DGT-PP-LF-P operate with ceramic output capacitors smaller than 1μF?

Yes - the device is stable with output capacitors as low as 0.47μF, provided ESR remains below 1.2Ω. Using 0.47μF improves transient response speed but may increase peak voltage deviation during large load steps; 1μF is the typical recommendation balancing stability, size, and performance.

Is there a risk of reverse current flow from OUT to IN in MP20041DGT-PP-LF-P?

Yes - the internal PMOS pass element includes a body diode that conducts if VOUT exceeds VIN by >0.7V. In applications where VOUT may be externally biased (e.g., hot-swap, backup battery), an external Schottky diode (anode to IN, cathode to OUT) is required to block reverse current and prevent misoperation or damage.

How does thermal shutdown behave during continuous overload?

When junction temperature reaches 140°C, the device disables both LDOs. It remains off until temperature drops by 10°C (to ~130°C), then automatically resumes regulation. This hysteresis prevents rapid on/off cycling, protecting downstream circuitry and enabling safe thermal recovery without host intervention.

What is the minimum recommended PCB copper area for the GND pad?

A minimum 25mm² exposed copper area (e.g., 5mm × 5mm) connected directly to the GND pin and thermal pad is recommended. This reduces θJA from 80°C/W to ≤55°C/W, allowing up to 250mW continuous power dissipation at +25°C ambient - essential for sustaining 300mA loads without thermal derating.

Does MP20041DGT-PP-LF-P require external feedback resistors for its fixed 3.0V outputs?

No - the MP20041DGT-PP-LF-P uses factory-trimmed internal feedback networks for its 3.0V/3.0V outputs. No external resistors are needed, simplifying layout and eliminating resistor tolerance errors that would affect output accuracy in adjustable LDOs.

How does load regulation performance vary between light and full load?

Load regulation is specified as ±35mV from 1mA to 300mA - meaning output voltage deviates no more than ±35mV across the full load range. At 3.0V nominal, this corresponds to ±1.17% variation, meeting tight analog supply requirements without post-regulation filtering.