Monolithic Power Systems Inc. MP20142DGT-LF-Z

Overview

MP20142DGT-LF-Z 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 channel enable via EN1/EN2 pins for battery-powered portable systems.

For engineers reviewing the MP20142DGT-LF-Z datasheet, MP20142DGT-LF-Z pinout, MP20142DGT-LF-Z application, or MP20142DGT-LF-Z equivalent, key selection criteria include programmable dual-LDO voltage configuration, shutdown current <1µA, 60mV dropout at 100mA, 7µVRMS noise, and TQFN8 (2mm×2mm) thermal performance in space-constrained designs.

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 control, current limiting (660mA), thermal shutdown (140°C), and output discharge via internal 20–100Ω path.

Voltage programming is achieved through binary-state logic on P1/P2 pins (L/H/Open), selecting one of nine fixed VOUT1/VOUT2 pairs - e.g., P1=H, P2=Open yields 2.8V/3.3V - with no external resistors required. The architecture eliminates base-drive losses inherent in PNP-based LDOs, extending battery life in low-power applications.

Key Specifications

Pinout & Package

MP20142DGT-LF-Z is housed in a thermally enhanced TQFN8 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad for PCB heat dissipation. Pin 1 is marked by top-side index area; GND pins (6, 7, 8) and VIN (1) are routed to large copper areas for optimal thermal and EMI performance.

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-Z uniquely integrates dual programmable LDOs in a 2mm×2mm package with output discharge and sub-1µA shutdown - enabling compact, flexible, and battery-optimized multi-rail designs unattainable with single-channel alternatives.

Availability

MP20142DGT-LF-Z is available at Aetrix Electronics and suitable for cellular phones, battery-powered handheld equipment, and wireless LAN modules requiring stable component supply across industrial temperature ranges (-40°C to +85°C).

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

The MP20142 belongs to MPS's low-noise, low-quiescent-current LDO product line, designed specifically for battery-powered portable electronics demanding programmable dual-rail regulation, minimal footprint, and robust protection features.

FAQ

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

P1 and P2 accept three logic states: Low (≤0.4V), High (≥1.6V), or Open (floating). Their combined states select one of nine predefined VOUT1/VOUT2 pairs - e.g., P1=High, P2=Open sets VOUT1=2.8V and VOUT2=3.3V. No pull-up/down resistors are needed; internal bias ensures reliable Open-state detection at 0.7V.

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

Yes: a minimum 0.47µF ceramic input capacitor (X5R/X7R) is required on VIN, and 0.47–10µF ceramic output capacitors (ESR <1Ω) are recommended for each VOUT. Larger values improve transient response but increase board area; tantalum caps are acceptable but less stable than ceramic.

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

When EN1 or EN2 is driven low, an internal 20–100Ω NMOS switch connects the corresponding VOUT pin to GND, discharging external capacitors rapidly. This prevents residual voltage from interfering with downstream logic reset sequences or causing latch-up in powered-down subsystems.

What thermal derating applies when operating above 25°C ambient?

With θJA = 80°C/W on a standard 4-layer board, maximum power dissipation drops linearly: PD(MAX) = (125°C − TA)/80. At 85°C ambient, max dissipation is 0.5W. To maintain 200mA per channel at high VIN–VOUT differentials, use PCB copper pours under the exposed thermal pad to lower effective θJA.

Can EN1 and EN2 be tied together, and what happens if left floating?

EN1 and EN2 may be tied together for simultaneous channel control, but neither pin must float - datasheet explicitly warns against floating EN pins due to undefined logic state and potential shoot-through or oscillation. Always tie unused EN pins to VIN (ON) or GND (OFF) with direct connection.

Is MP20142DGT-LF-Z RoHS-compliant and halogen-free?

Yes: the "-LF" suffix denotes lead-free, RoHS-compliant packaging; the "-Z" suffix indicates tape-and-reel delivery. The TQFN8 package meets JEDEC MO-229 standards and contains no halogens per IEC 61249-2-21 requirements.

What is the guaranteed accuracy over temperature and load conditions?

Output voltage accuracy is ±2.5% over full operating range (−40°C to +85°C ambient, 1mA–200mA load, 2.5V–5.5V input). Load regulation is ≤1.2% for VOUT >1.5V and ≤1.8% for VOUT ≤1.5V; line regulation is ≤0.1%/V - all specified in the Electrical Characteristics table.