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

Overview

MP20043DGT-D-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-designed for battery-powered wireless LAN and handheld equipment.

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

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 logic (EN1/EN2), internal current limiting (660mA short-circuit limit), and thermal shutdown with 10°C hysteresis.

Voltage programming is achieved through binary-coded states of P1 and P2 pins (High/Low/Open), selecting one of nine pre-defined VOUT1/VOUT2 pairs per combination (e.g., Combination A, B, C, or E). Output discharge resistance is 20–100Ω when disabled, ensuring rapid rail collapse in power sequencing applications.

Key Specifications

Pinout & Package

TQFN8 (2mm × 2mm) package 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 XC6216Dxx1MR-G and RP111Nxx1B-TR-F, MP20043DGT-D-LF-P uniquely integrates dual programmable outputs in one TQFN8 package with superior PSRR, lower noise, and zero-resistor configuration - reducing component count, layout area, and design validation effort for portable electronics.

Availability

MP20043DGT-D-LF-P is available at Aetrix Electronics and suitable for cellular phones, battery-powered handheld equipment, and wireless LAN modules requiring stable component supply across production lifecycles.

Supply support for MP20043DGT-D-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 design centers in the US, China, and Taiwan.

The MP20043 belongs to MPS's low-noise, programmable LDO product line, engineered specifically for space- and power-constrained portable electronics needing flexible, reliable dual-rail regulation without external programming components.

FAQ

What are the valid voltage combinations for MP20043DGT-D-LF-P?

The MP20043DGT-D-LF-P supports nine distinct VOUT1/VOUT2 pairs depending on P1 and P2 pin states (High/Low/Open), grouped into Combinations A, B, C, and E. For example, with P1=Open and P2=Open, VOUT1=2.8V and VOUT2=3.3V (Combination A). Full tables are provided in the datasheet Rev. 1.1, page 4.

Can EN1 and EN2 be tied together for simultaneous control?

Yes - EN1 and EN2 may be connected to a common enable signal for synchronized channel activation or shutdown. However, doing so forfeits independent sequencing capability. The pins accept standard CMOS logic levels (VIH ≥1.6V, VIL ≤0.4V) and must never be left floating.

What is the recommended output capacitor for optimal transient response?

A 1µF X5R/X7R ceramic capacitor with ESR <1Ω is specified for stable operation and optimal load transient response. Capacitance may be increased up to 10µF to further improve ripple suppression and transient recovery, provided physical size and board space allow.

Does MP20043DGT-D-LF-P require an input capacitor?

Yes - a minimum 0.47µF ceramic input capacitor is required between VIN and GND, placed as close as possible to pins 1 and 6. Larger values improve line transient response but increase solution size; tantalum capacitors are acceptable alternatives if ceramic is unavailable.

How does the output discharge function operate during shutdown?

When EN1 or EN2 is driven low, the corresponding VOUT pin connects internally to GND through a 20–100Ω switch, actively discharging external capacitance. This ensures rapid, predictable rail collapse for proper system reset timing and avoids floating voltages that could cause latch-up in downstream ICs.

What thermal derating applies above 25°C ambient?

With θJA = 80°C/W on a standard 4-layer board, maximum continuous power dissipation decreases linearly: PD(MAX) = (125°C − TA)/80°C/W. At TA = 60°C, PD(MAX) = 0.81W. Exceeding this causes thermal shutdown at 140°C junction temperature, with 10°C hysteresis before automatic recovery.

Is MP20043DGT-D-LF-P compatible with lead-free reflow profiles?

Yes - the TQFN8 package is rated for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260°C for 10 seconds. The exposed thermal pad must be soldered to a solid ground plane for both thermal performance and mechanical reliability.