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

Overview

MP20043DGT-C-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, 7μVRMS output noise, and independent EN1/EN2 shutdown control. It uses internal PMOS pass devices, delivers 60mV dropout at 100mA, and supports battery-powered wireless LAN and handheld equipment.

For engineers reviewing the MP20043DGT-C-LF-P datasheet, MP20043DGT-C-LF-P pinout, MP20043DGT-C-LF-P application, or MP20043DGT-C-LF-P equivalent, key selection criteria include programmable dual-output voltage configuration via P1/P2 logic states, ultra-low quiescent current (150μA dual-channel active, <1μA shutdown), and TQFN8 (2mm×2mm) thermal performance with θJA = 80°C/W.

Technical Context

The MP20043 implements two independent LDO channels with P-channel MOSFET pass elements, enabling low dropout (60mV @100mA) and near-zero shutdown current. Each channel features dedicated enable pins (EN1/EN2), internal current limiting (660mA short-circuit limit), and thermal shutdown at 140°C with 10°C hysteresis.

Voltage programming is achieved through binary-coded P1/P2 terminal states (High/Low/Open), selecting one of nine pre-defined VOUT1/VOUT2 pairs per combination (e.g., Combination C yields 1.8V/2.8V to 3.3V/3.3V). Output discharge resistance (20–100Ω) activates during shutdown to rapidly deplete stored charge.

Key Specifications

Pinout & Package

TQFN8 (2mm × 2mm, 0.5mm pitch) with exposed thermal pad; RoHS-compliant, halogen-free, lead-free construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6223DxxMR and RP114Lxx1x-TR, MP20043DGT-C-LF-P uniquely integrates dual programmable outputs, independent enables, output discharge, and industry-leading 75dB PSRR - reducing component count while enabling dynamic power management in space-constrained battery systems.

Availability

MP20043DGT-C-LF-P is available at Aetrix Electronics and suitable for wireless LAN modules, battery-powered medical sensors, and industrial handheld scanners requiring stable component supply across automotive-grade temperature ranges (−40°C to +85°C).

Supply support for MP20043DGT-C-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 over two decades of innovation in DC/DC converters, LDOs, and motor drivers.

The MP20043 belongs to MPS's ultra-low-noise, programmable LDO product line, designed specifically for battery-powered portable electronics demanding dual-rail flexibility, minimal quiescent current, and robust thermal behavior.

FAQ

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

P1 and P2 each accept three states: High (≥1.6V), Low (≤0.4V), or Open (floating, detected at ~0.7V). Their combined states select one of nine predefined VOUT1/VOUT2 pairs - e.g., P1=Open, P2=Open yields 2.8V/3.3V in Combination A. The datasheet defines four combinations (A/C/E/B), with MP20043DGT-C-LF-P using Combination C.

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

Yes: a minimum 0.47µF ceramic input capacitor (X5R/X7R) is mandatory for stability; 1µF is typical. Output capacitors must be ceramic, 0.47–10µF, with ESR <1Ω. Larger values improve load transient response but increase size - no upper limit on input capacitance.

How does the output discharge function operate during shutdown?

When EN1 or EN2 is driven Low, an internal 20–100Ω switch connects the corresponding VOUT pin to GND, actively discharging external output capacitors. This prevents residual voltage from powering downstream logic or causing undefined states during power sequencing.

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

Using θJA = 80°C/W and TJ(MAX) = 125°C, maximum continuous power dissipation is PD(MAX) = (125°C − 85°C)/80°C/W = 0.5W. Exceeding this triggers thermal shutdown at 140°C. PCB layout with thermal pad soldering is critical to maintain this rating.

Can MP20043DGT-C-LF-P operate with input voltage below 2.5V?

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

Is the MP20043DGT-C-LF-P pin-compatible with other variants in the MP20043 family?

Yes - all MP20043 variants (A/B/C/E-LF-Z) share identical TQFN8 (2mm×2mm) package, pinout, and electrical interface. Only top marking and programmed voltage combination differ; no layout changes are needed when substituting within the family.

What failure protections are integrated into the MP20043DGT-C-LF-P?

It integrates per-channel current limiting (660mA short-circuit limit), thermal shutdown (140°C activation, 10°C hysteresis), and ESD protection (2kV HBM). These operate autonomously without external components, ensuring robustness in uncontrolled environments.