Monolithic Power Systems Inc. MP20043DGT-A-LF-P

Overview

MP20043DGT-A-LF-P from Monolithic Power Systems is a dual-channel, 300mA low-dropout linear regulator with programmable output voltage (1.2V–3.3V in 100mV steps, ±2.5% accuracy), 75dB PSRR at 1kHz, and 7μVRMS output noise. It uses internal PMOS pass devices, supports independent channel enable via EN1/EN2, and provides output discharge during shutdown. Used in battery-powered wireless LAN modules requiring stable dual-rail low-noise bias.

For engineers reviewing the MP20043DGT-A-LF-P datasheet, MP20043DGT-A-LF-P pinout, MP20043DGT-A-LF-P application, or MP20043DGT-A-LF-P equivalent, key selection criteria include programmable dual-output flexibility, 60mV dropout at 100mA, shutdown current <1µA, thermal protection at 140°C, and TQFN8 (2mm×2mm) package compatibility with space-constrained portable designs.

Technical Context

The MP20043 implements two independent LDO channels with P-channel MOSFET pass elements, enabling ultra-low dropout (60mV @ 100mA) and near-zero quiescent current in shutdown mode (0.01–1µA). Each channel features dedicated enable inputs (EN1/EN2) and programmable output voltage determined by binary states (High/Low/Open) of P1 and P2 pins.

It integrates current limiting (660mA short-circuit limit), thermal shutdown (140°C trip with 10°C hysteresis), and output discharge (20–100Ω internal resistance when disabled). The device operates from 2.5V to 5.5V input and maintains 75dB PSRR at both 100Hz and 1kHz under 300mA load.

Key Specifications

Pinout & Package

TQFN8 (2mm × 2mm) package with exposed thermal pad; RoHS-compliant, halogen-free, and rated for –40°C to +85°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6216D182MR-G and RP114K281D-TR-F, MP20043DGT-A-LF-P uniquely delivers field-programmable dual outputs in one TQFN8 package, enabling hardware reuse across multiple voltage configurations while maintaining 300mA capability, 60mV dropout, and sub-1µA shutdown current.

Availability

MP20043DGT-A-LF-P is available at Aetrix Electronics and suitable for wireless LAN modules, battery-powered sensors, and hand-held medical devices requiring stable component supply with guaranteed long-term availability.

Supply support for MP20043DGT-A-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 emphasis on efficiency, integration, and reliability for power management solutions.

The MP20043 belongs to MPS's precision dual-LDO product line, designed specifically for space-constrained, battery-operated applications demanding programmable dual-rail regulation, ultra-low quiescent current, and robust thermal protection.

FAQ

What are the valid logic states for P1 and P2 pins, and how do they affect output voltage?

P1 and P2 accept three valid states: High (≥1.6V), Low (≤0.4V), or Open (floating, biased to ~0.7V internally). These states select one of nine pre-defined VOUT1/VOUT2 pairs-e.g., P1=Open, P2=Open yields 2.8V/3.3V. No external pull-up/down resistors are needed due to internal biasing.

Does MP20043DGT-A-LF-P require external capacitors, and what are the recommended values?

Yes: a minimum 0.47µF ceramic input capacitor is required; output capacitors of 0.47–10µF ceramic (ESR <1Ω) are recommended. Larger values improve transient response and noise suppression but increase board area. Tantalum capacitors are acceptable but less optimal than ceramic for ESR and stability.

How does the output discharge function operate during shutdown?

When EN1 and/or EN2 are driven low, an internal 20–100Ω discharge path connects the corresponding VOUT pin to GND, actively collapsing the output voltage within microseconds. This prevents back-powering of downstream components and eliminates residual voltage that could cause latch-up or false wake-up in system-level power sequencing.

What is the maximum allowable power dissipation for MP20043DGT-A-LF-P in its TQFN8 package?

At TA = 25°C, maximum continuous power dissipation is 1.5W (θJA = 80°C/W). Derating is required above 25°C ambient: PD(MAX) = (125°C − TA)/80°C/W. Exceeding this limit triggers thermal shutdown at 140°C junction temperature, with automatic recovery after 10°C cooldown.

Can EN1 and EN2 be tied together for simultaneous channel control?

Yes-EN1 and EN2 may be connected to a common logic signal for synchronized on/off control. However, doing so forfeits independent channel sequencing capability. If staggered startup or selective shutdown is required (e.g., powering RF before baseband), EN1 and EN2 must be driven separately with proper logic-level translation.

Is MP20043DGT-A-LF-P compatible with lead-free reflow soldering processes?

Yes-the TQFN8 package is RoHS-compliant and rated for standard lead-free reflow profiles, including peak temperatures up to 260°C for 10 seconds. The exposed thermal pad must be soldered to a PCB ground plane to ensure thermal performance and mechanical reliability.