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

Overview

MP20041DGT-MG-LF-P from Monolithic Power Systems is a dual-channel, ultra-low-noise, high-PSRR linear regulator with fixed 2.8V and 1.8V outputs, 300mA per channel, 11μVRMS output noise, and 72dB PSRR at 10kHz-designed for RF-sensitive power rails in battery-powered wireless LAN modules.

For engineers reviewing the MP20041DGT-MG-LF-P datasheet, MP20041DGT-MG-LF-P pinout, MP20041DGT-MG-LF-P application, or MP20041DGT-MG-LF-P equivalent, key selection criteria include dual independent enable control, PMOS pass element dropout performance (75mV @100mA), thermal shutdown threshold (140°C), and TQFN8 package thermal resistance (θJA = 80°C/W).

Technical Context

The MP20041 integrates two independent LDOs sharing a common input and ground but featuring separate EN1/EN2 controls and OUT1/OUT2 outputs. Each channel uses an internal PMOS pass transistor enabling low dropout (≤220mV @300mA) and near-zero reverse current without external diodes.

It delivers 11μVRMS integrated noise (100Hz–100kHz) without requiring a noise-bypass capacitor, and achieves 72dB PSRR at 10kHz under 150mA load-critical for powering VCOs, ADCs, and RF front-ends where supply ripple directly impacts signal integrity.

Key Specifications

Pinout & Package

MP20041DGT-MG-LF-P is housed in a thermally enhanced 2mm × 2mm TQFN-8 package with exposed thermal pad (pin 5 = GND). The package supports ≤1.25W continuous power dissipation at TA = +25°C and features 80°C/W junction-to-ambient thermal resistance on a standard 4-layer PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6216D2818MR-G and RT9080A-2818GJ6F, MP20041DGT-MG-LF-P delivers superior RF noise immunity (11μVRMS vs. ≥20μVRMS) and higher PSRR (72dB vs. ≤68dB), making it optimal for co-located RF/analog systems where supply coupling directly impacts measurement accuracy or wireless range.

Availability

MP20041DGT-MG-LF-P is available at Aetrix Electronics and suitable for wireless LAN modules, portable medical sensors, and handheld industrial scanners requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MP20041DGT-MG-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 noise-sensitive RF, medical, and precision analog applications where traditional LDOs introduce unacceptable supply-induced distortion.

FAQ

What are the exact output voltages programmed for MP20041DGT-MG-LF-P?

The MP20041DGT-MG-LF-P is factory-configured with Channel 1 (OUT1) set to 2.8V and Channel 2 (OUT2) set to 1.8V, both trimmed to ±1% accuracy across –40°C to +85°C. These values are fixed and non-adjustable via external resistors.

Can MP20041DGT-MG-LF-P operate with input voltage below 2.5V?

No. The absolute minimum input voltage is 2.5V per the Recommended Operating Conditions. Operation below this violates specification and may cause output regulation failure or undefined behavior, especially near dropout conditions.

Is the thermal pad (pin 5) required to be soldered to PCB ground?

Yes. Pin 5 is the GND terminal and also serves as the primary thermal path. It must be soldered to a solid ground plane using multiple thermal vias to achieve the specified θJA = 80°C/W and prevent thermal shutdown under 300mA load.

Does MP20041DGT-MG-LF-P require external noise-bypass capacitors?

No. Its 11μVRMS output noise is achieved without external bypass capacitors due to internal noise-reduction architecture-verified across 100Hz–100kHz with 1μF ceramic output capacitors.

What happens if EN1 and EN2 are left floating?

Leaving EN1 or EN2 floating violates Absolute Maximum Ratings and may cause unpredictable output states, increased quiescent current, or latch-up. Both enable pins must be actively driven high (≥1.6V) or low (≤0.45V), or tied to VIN/GND as needed.

How does MP20041DGT-MG-LF-P handle reverse current flow from OUT to IN?

The internal PMOS pass element includes a body diode that conducts if VOUT > VIN + ~0.7V. To prevent unintended reverse current (e.g., during hot-swap or backup power scenarios), an external Schottky diode is recommended across IN–OUT per the datasheet Figure 4.

What is the maximum allowable power dissipation at 60°C ambient temperature?

Using PD(MAX) = (TJ(MAX) − TA)/θJA and TJ(MAX) = 125°C (Recommended Operating), PD(MAX) = (125 − 60)/80 = 0.81W. Exceeding this risks thermal shutdown; derating is required above 25°C ambient.