Monolithic Power Systems Inc. MP20142DGT-LF-P

Overview

MP20142DGT-LF-P from Monolithic Power Systems is a dual-channel, 200mA low-dropout linear regulator with programmable output voltage (1.2V–3.3V in 100mV steps), ±2.5% accuracy, and integrated output discharge. It uses internal P-channel MOSFET pass devices, delivers 75dB PSRR at 1kHz, and supports independent enable control per channel for battery-powered wireless LAN and handheld equipment.

For engineers reviewing the MP20142DGT-LF-P datasheet, MP20142DGT-LF-P pinout, MP20142DGT-LF-P application, or MP20142DGT-LF-P equivalent, key selection criteria include programmable dual-output voltage configuration, 60mV dropout at 100mA, 7µVRMS output noise, shutdown current <1µA, and TQFN8 (2mm×2mm) thermal performance with θJA = 80°C/W.

Technical Context

The MP20142 implements two independent LDO channels with P-channel MOSFET pass elements, enabling ultra-low dropout (60mV @ 100mA) and near-zero quiescent current in shutdown (0.01–1µA). Each channel features dedicated EN pins, internal current limiting (660mA), and thermal shutdown at 140°C with 10°C hysteresis.

Output voltage is set via binary encoding of P1/P2 states (Low/High/Open), yielding nine deterministic combinations (e.g., P1=Open, P2=H → VOUT1=3.0V, VOUT2=3.3V). The device maintains 75dB AC PSRR at 1kHz and 7µVRMS integrated noise (10Hz–30kHz) under 1mA load with 1µF ceramic output capacitors.

Key Specifications

Pinout & Package

MP20142DGT-LF-P is housed in a thermally enhanced TQFN8 package (2mm × 2mm, 0.6mm height) with exposed thermal pad. Pin 1 is marked by a dot; the exposed paddle must be soldered to PCB ground for optimal thermal performance (θJA = 80°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6223D121MR-G and RT9013-33GB, MP20142DGT-LF-P uniquely delivers dual programmable outputs in one TQFN8 package with sub-1µA shutdown, integrated discharge, and 7µVRMS noise-enabling compact, low-power, multi-rail designs without compromise.

Availability

MP20142DGT-LF-P is available at Aetrix Electronics and suitable for wireless LAN modules, battery-powered handheld equipment, and laptop subsystems requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.

Supply support for MP20142DGT-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 mixed-signal ICs for power management, motion control, and automotive applications.

The MP20142 belongs to MPS's low-noise, programmable LDO product line, designed specifically for space-constrained, battery-operated devices requiring multiple precision voltage rails with minimal quiescent power and robust protection.

FAQ

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

P1 and P2 accept three valid states: Low (connected to GND), High (connected to VIN), or Open (unconnected, high-impedance). These states combine to select one of nine deterministic output voltage pairs (e.g., P1=Open, P2=H yields VOUT1=3.0V, VOUT2=3.3V). Bias currents are specified at ±8µA for high/low states and 0.7V for open-state threshold; floating is not permitted.

Does MP20142DGT-LF-P require external capacitors, and what values are recommended?

Yes: a minimum 0.47µF ceramic input capacitor is required; larger values improve line transient response. For outputs, 0.47–10µF ceramic capacitors with ESR <1Ω are recommended-1µF is used in all electrical characteristics testing. Tantalum capacitors may be used but offer no advantage over X5R/X7R ceramics in size or stability.

How does the output discharge function operate, and what is its resistance range?

When either EN1 or EN2 is driven low, an internal 20–100Ω discharge path connects the corresponding VOUT pin to GND, rapidly discharging external output capacitors. This prevents residual voltage from interfering with system reset sequencing or causing latch-up in downstream logic, especially critical in battery-backed systems.

What is the thermal shutdown behavior, and can it recover automatically?

Thermal shutdown activates at TJ = 140°C and disables both LDO channels. Recovery occurs automatically when junction temperature falls by 10°C (to ~130°C), re-enabling regulation. This auto-restart cycle protects against permanent damage during sustained overload or poor heatsinking, with no external intervention required.

Can MP20142DGT-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 conditions and risks failure to regulate-especially at higher output voltages or loads. Dropout voltage is specified starting from VIN = (VOUT + 0.4V) or 2.5V, whichever is greater.

Is the TQFN8 package lead-free and RoHS compliant?

Yes: the "-LF" suffix in MP20142DGT-LF-P explicitly denotes lead-free, RoHS-compliant packaging. The device meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards.

How does PSRR performance vary with load and frequency?

PSRR is specified at 75dB at 1kHz with 200mA load on one channel and 1µF output capacitor. Performance degrades above 10kHz due to internal compensation; typical data shows ~55dB at 100kHz and ~35dB at 1MHz. Maintaining low ESR output capacitance and proper PCB layout preserves high-frequency rejection.