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

Overview

MP20041DGT-MG-LF-Z from Monolithic Power Systems is a dual-channel, ultra-low-noise, high-PSRR linear regulator with fixed 2.8V and 1.8V outputs, delivering up to 300mA per channel from a 2.5V–6.0V input. It features 11μVRMS output noise without bypass capacitor, 72dB PSRR at 10kHz, and 73mV dropout at 100mA - optimized for RF-sensitive and battery-powered systems.

For engineers reviewing the MP20041DGT-MG-LF-Z datasheet, MP20041DGT-MG-LF-Z pinout, MP20041DGT-MG-LF-Z application, or MP20041DGT-MG-LF-Z equivalent, key selection criteria include independent enable control (EN1/EN2), thermal shutdown (140°C), current limit (525mA), and TQFN8 package compatibility with space-constrained PCB layouts.

Technical Context

The MP20041DGT-MG-LF-Z integrates two independent PMOS-based LDOs with separate enable inputs, enabling selective channel shutdown to achieve near-zero quiescent current (0.03μA). Each regulator maintains tight 1% output voltage accuracy across –40°C to +85°C ambient temperature.

Its architecture delivers fast load transient response (<200μs recovery) with only 1μF ceramic output capacitors, supported by internal compensation and low ESR stability down to 0.1Ω. Channel-to-channel isolation exceeds 60dB above 1MHz, minimizing crosstalk in mixed-signal power domains.

Key Specifications

Pinout & Package

MP20041DGT-MG-LF-Z is housed in a thermally enhanced 2mm × 2mm TQFN-8 package with exposed thermal pad (pin 5 GND connected to die attach paddle). The compact footprint supports high-density layout in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6223D281MR-G and RT9080L-2818, MP20041DGT-MG-LF-Z uniquely combines dual fixed outputs, 11μVRMS noise, and 72dB PSRR in a 2mm×2mm package - making it the only option meeting stringent RF and precision analog power requirements without additional filtering or sequencing ICs.

Availability

MP20041DGT-MG-LF-Z is available at Aetrix Electronics and suitable for wireless LAN modules, portable medical sensors, and industrial handheld scanners requiring stable component supply with guaranteed long-term availability.

Supply support for MP20041DGT-MG-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 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 portable computing applications demanding simultaneous dual-rail regulation with minimal board area.

FAQ

What are the exact output voltages of MP20041DGT-MG-LF-Z?

The MP20041DGT-MG-LF-Z provides factory-trimmed fixed outputs: OUT1 = 2.8V ±1% and OUT2 = 1.8V ±1%, verified per the ordering guide code "MG" and confirmed in the Rev. 1.2 datasheet Table 1. These values are non-adjustable and do not require external feedback components.

Can MP20041DGT-MG-LF-Z operate from a 2.5V input when regulating 2.8V output?

No - the minimum input voltage must exceed the higher output voltage plus dropout. With 2.8V OUT1 and 75mV dropout at 100mA, VIN must be ≥2.875V. At 2.5V input, only the 1.8V output can regulate; the 2.8V channel drops out and ceases regulation.

Is an external Schottky diode required to prevent reverse current?

Yes - the internal PMOS body diode conducts if VOUT > VIN + ~0.7V. For applications where output voltage may exceed input (e.g., hot-swap, backup battery), an external Schottky (e.g., Diodes Inc. DFLS160) must be placed anode-to-IN, cathode-to-OUT per Figure 4 in the datasheet.

What is the recommended PCB layout for thermal performance?

Connect pin 5 (GND) to a solid internal or bottom-layer ground plane covering ≥40mm², with ≥4 thermal vias (0.3mm diameter) directly under the exposed pad. Place 1μF input and output ceramic capacitors within 2mm of their respective pins, using X5R/X7R dielectrics rated ≥6.3V.

Does MP20041DGT-MG-LF-Z support power sequencing between the two outputs?

Yes - EN1 and EN2 are fully independent, allowing precise control of startup order (e.g., enable 1.8V before 2.8V) and individual shutdown during low-power states. No external timing circuitry is needed; sequencing is implemented via host MCU GPIO timing.

What is the maximum allowable power dissipation at 85°C ambient?

Using θJA = 80°C/W from the datasheet, PD(MAX) = (125°C − 85°C) / 80°C/W = 0.5W. At VIN = 4.2V and VOUT1 = 2.8V, this limits continuous 300mA operation to ≤3.5V input or reduced load current to avoid thermal shutdown.

Are there any known reliability concerns with the TQFN8 package in reflow soldering?

No - the 2mm×2mm TQFN8 package is qualified per JEDEC J-STD-020D for moisture sensitivity level 3 (MSL3) and withstands standard lead-free reflow profiles (peak 260°C, 10s). Proper stencil aperture (0.18mm thickness, 0.25mm opening) ensures reliable solder joint formation on the thermal pad.