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

Overview

MP20041DGT-GC-LF-Z from Monolithic Power Systems is a dual-channel, ultra-low-noise, high-PSRR linear regulator delivering 300mA per channel with 1.2V–3.6V programmable outputs (100mV steps, ±1% accuracy), 11μVRMS output noise without bypass capacitor, and 72dB PSRR at 10kHz - deployed in battery-powered handheld devices requiring clean, low-quiescent-power rail generation.

For engineers reviewing the MP20041DGT-GC-LF-Z datasheet, MP20041DGT-GC-LF-Z pinout, MP20041DGT-GC-LF-Z application, or MP20041DGT-GC-LF-Z equivalent, key selection criteria include dual independent enable control, PMOS pass transistor architecture enabling near-zero shutdown current, thermal/overcurrent protection, and TQFN8 package compatibility with space-constrained portable designs.

Technical Context

The MP20041 integrates two independent LDOs sharing a common input and ground, each with dedicated EN pins (EN1/EN2) for asynchronous channel control and internal PMOS pass elements enabling low dropout (75mV @100mA, VOUT=1.8V) and ultra-low quiescent current (114μA total, both channels active). It operates across 2.5V–6.0V input while maintaining regulation down to 1.2V output.

Its noise performance is specified at 11μVRMS (100Hz–100kHz, 10mA load) without external noise-reduction capacitors, and PSRR reaches 72dB at 10kHz under 150mA load - enabled by high-gain error amplifiers and optimized internal compensation. Thermal shutdown activates at 140°C with 10°C hysteresis, and current limit is set to 525mA per channel.

Key Specifications

Pinout & Package

MP20041DGT-GC-LF-Z is housed in a thermally enhanced 2mm × 2mm TQFN-8 package with exposed thermal pad (pin 5 = GND), supporting high-density PCB layouts and efficient heat dissipation in compact portable systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A202025PDBVR and ADP7158ARDZ-1.2, MP20041DGT-GC-LF-Z uniquely delivers true dual-channel integration with matched 300mA capability, 11μVRMS noise without bypass caps, and per-channel enable - reducing component count, footprint, and design risk in space- and noise-sensitive portable systems.

Availability

MP20041DGT-GC-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, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP20041DGT-GC-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 expertise in DC/DC converters, LDOs, motor drivers, and LED drivers since 1997.

The MP20041 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for noise-sensitive portable and wireless applications where PSRR, dropout, and quiescent current directly impact battery life and RF performance.

FAQ

What output voltages does MP20041DGT-GC-LF-Z provide?

The MP20041DGT-GC-LF-Z is a factory-programmed variant with fixed output voltages: Channel 1 (OUT1) = 1.2V and Channel 2 (OUT2) = 2.5V, confirmed by the "GC" suffix in the ordering code per MPS's Output Voltage Selector Guide. These values are trimmed to ±1% accuracy across temperature and load.

Can MP20041DGT-GC-LF-Z operate with a 2.5V input when regulating 2.5V output?

No - the minimum input voltage must exceed the output voltage by the dropout margin. At 2.5V output and 100mA load, dropout is 60mV (per datasheet), so VIN must be ≥2.56V. At 300mA, dropout rises to 180mV, requiring VIN ≥2.68V. Operation at exactly 2.5V input would cause regulation loss.

Is an external Schottky diode required for reverse current protection?

Yes - the internal PMOS pass element includes a parasitic body diode from OUT to IN. If VOUT exceeds VIN by >0.3V (e.g., during hot-swap or backup battery scenarios), reverse current flows. MPS explicitly recommends adding an external Schottky diode in parallel to clamp reverse voltage and prevent misoperation.

How does the MP20041 handle simultaneous load transients on both channels?

Each LDO has independent feedback and pass transistors, so load transients on one channel induce minimal cross-coupling (<10mV typical per datasheet waveforms). The 2mm×2mm TQFN8 package's low thermal resistance (θJA = 80°C/W) prevents thermal interaction, and separate COUT placement ensures localized transient suppression.

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

Using PD(MAX) = (TJ(MAX) − TA)/θJA and TJ(MAX) = 125°C (recommended max junction temp), θJA = 80°C/W, and TA = 85°C: PD(MAX) = (125 − 85)/80 = 0.5W. This limits usable (VIN − VOUT) × IOUT combinations - e.g., at VIN = 5.0V and VOUT = 1.8V, max continuous IOUT per channel is ~156mA.

Does MP20041DGT-GC-LF-Z require external compensation components?

No - the MP20041 is internally compensated and designed to remain stable with 0.47–10μF ceramic output capacitors having ESR <1.2Ω. Adding external compensation resistors or capacitors is unnecessary and may degrade transient response or stability per the datasheet's Application Information section.