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

Overview

MP20041DGT-MS-LF-Z from Monolithic Power Systems is a dual-channel, ultra-low-noise, high-PSRR linear regulator with 300mA per channel output capability, 11μVRMS output noise (no bypass capacitor required), 72dB PSRR at 10kHz, and 73mV dropout at 100mA load-designed for powering sensitive analog/RF circuitry in battery-powered wireless LAN modules.

For engineers reviewing the MP20041DGT-MS-LF-Z datasheet, MP20041DGT-MS-LF-Z pinout, MP20041DGT-MS-LF-Z application, or MP20041DGT-MS-LF-Z equivalent, key selection criteria include dual independent enable control (EN1/EN2), ±1% output voltage accuracy across 1.2V–3.6V range in 100mV steps, thermal shutdown at 140°C, and TQFN8 (2mm × 2mm) package compatibility with space-constrained portable designs.

Technical Context

The MP20041 integrates two independent PMOS-based LDOs with separate enable inputs (EN1/EN2), enabling selective channel shutdown to achieve <1μA total quiescent current when both channels are disabled. Each regulator features internal current limiting (525mA short-circuit limit) and thermal shutdown with 10°C hysteresis.

Its architecture delivers fast line/load transient response using only 1μF ceramic input/output capacitors, supported by low ESR stability requirements (<1.2Ω) and inherent reverse-current protection mitigation guidance via external Schottky diode recommendation.

Key Specifications

Pinout & Package

MP20041DGT-MS-LF-Z is housed in a thermally enhanced 2mm × 2mm TQFN8 package with exposed thermal pad (pin 5 GND). The package supports high-density layout and efficient heat dissipation in compact handheld PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6223D182MR-G and ADM7154ACPZ-1.8-R7, MP20041DGT-MS-LF-Z uniquely delivers dual independent enables, matched 300mA per channel, and 11μVRMS noise in a single 2mm × 2mm package - optimizing space, power, and noise performance for compact dual-rail systems.

Availability

MP20041DGT-MS-LF-Z is available at Aetrix Electronics and suitable for wireless LAN modules, battery-powered medical sensors, and industrial handheld scanners requiring stable component supply with full RoHS-compliant packaging and traceable sourcing.

Supply support for MP20041DGT-MS-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 focus on energy-efficient power management solutions for computing, communications, and consumer markets.

The MP20041 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for noise-sensitive RF/analog subsystems in portable and battery-operated devices where PSRR, dropout, and quiescent current are critical.

FAQ

What are the exact output voltages configured for MP20041DGT-MS-LF-Z?

The "MS" suffix corresponds to factory-programmed output voltages of 1.8V on OUT1 and 2.5V on OUT2, as defined in the MP20041 ordering guide. These values are trimmed to ±1% accuracy across temperature and load, with no external feedback resistors required.

Can MP20041DGT-MS-LF-Z operate with input voltage below 2.5V?

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

Is an external Schottky diode mandatory for reverse-current protection?

It is strongly recommended when VOUT can exceed VIN (e.g., during hot-swap or battery swap), as the internal PMOS body diode becomes forward-biased above ~0.7V differential. The datasheet explicitly advises adding a Schottky to clamp reverse voltage to ~0.3V.

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. This limits usable power at full 300mA per channel unless board-level thermal enhancements (e.g., thermal vias, ground plane) reduce effective θJA.

Does MP20041DGT-MS-LF-Z require output capacitors with specific ESR ranges?

Yes - the datasheet specifies stable operation with ceramic output capacitors having ESR < 1.2Ω. Capacitance between 0.47μF and 10μF is recommended; lower ESR improves load transient response but may risk instability if too low without proper compensation.

How does channel-to-channel isolation perform at RF frequencies?

Typical channel-to-channel isolation exceeds 60dB up to 1MHz per Figure 2 in the datasheet, achieved through independent PMOS pass elements and dedicated ground routing. This prevents coupling between RF and digital supply rails in mixed-signal applications.

What is the thermal shutdown recovery behavior after junction temperature drops?

Upon thermal shutdown at 140°C, the device remains off until junction temperature falls by 10°C (to 130°C), at which point normal regulation resumes automatically - no external reset or enable toggling is required for recovery.