Monolithic Power Systems Inc. MP2018GZD-5-P

Overview

MP2018GZD-5-P from Monolithic Power Systems is a fixed 5.0V, 500mA low-dropout linear regulator with 10µA quiescent current, 3V–16V input range, and integrated power-good (PG) with programmable delay via PGDL pin. It operates in TO252-5 package and delivers ±2% output accuracy across -40°C to +125°C ambient, enabling reliable power for ultra-low-power microcontrollers and battery-powered medical or portable equipment.

For engineers reviewing the MP2018GZD-5-P datasheet, MP2018GZD-5-P pinout, MP2018GZD-5-P application, or MP2018GZD-5-P equivalent, key selection criteria include dropout voltage at 500mA (≤1000mV), PG threshold hysteresis (5% VOUT), thermal shutdown at 165°C, and compatibility with ≥0.47µF ceramic output capacitors - all critical for energy-constrained, high-voltage-battery systems.

Technical Context

The MP2018GZD-5-P implements a PMOS pass transistor architecture with internal error amplifier, UVLO, and thermal sensing circuitry. Its 10µA quiescent current and 400mV typical dropout at 300mA enable operation under light-load battery conditions where efficiency and voltage headroom are constrained.

Power Good functionality is implemented as an open-drain output referenced to VOUT, with programmable assertion delay (6–14ms) set by external capacitor on PGDL pin and charged by 3–9µA internal current source. Thermal shutdown activates at 165°C with 30°C hysteresis, ensuring safe recovery without latch-up.

Key Specifications

Pinout & Package

MP2018GZD-5-P is housed in a TO252-5 surface-mount package with exposed thermal pad connected internally to GND. The pad must be soldered to a large copper ground plane for effective heat dissipation and optimal thermal resistance (θJC = 3°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Compared with XC6210B502MR-G and ADP7105ARDZ-5.0, MP2018GZD-5-P uniquely integrates programmable PG delay and TO252-5 thermal performance in a single 5V LDO - eliminating external timing components while sustaining 500mA in high-ambient environments.

Availability

MP2018GZD-5-P is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, and industrial handheld scanners requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant sourcing.

Supply support for MP2018GZD-5-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, and global manufacturing partnerships.

The MP2018 belongs to MPS's low-quiescent-current LDO product line, engineered specifically for battery-powered and energy-harvesting systems where extended runtime, wide input range, and integrated supervision features reduce system-level component count.

FAQ

What is the minimum output capacitor required for stability?

The MP2018GZD-5-P is stable with a minimum 0.47µF X5R or X7R ceramic capacitor on the output. Larger values (up to 22µF) improve load transient response and noise rejection. Tantalum or aluminum electrolytic capacitors are not recommended due to ESR and temperature drift issues that may compromise stability.

How does the PGDL pin set power-good delay time?

PGDL is charged by a 3–9µA internal current source to a 1.65V threshold. Delay time t_PGDL (ms) = C_PGDL (nF) × 1.65V / I_PGDL (µA). For example, a 47nF capacitor yields 6–14ms delay depending on actual IPGDL. The capacitor must be placed directly between PGDL and GND.

Can MP2018GZD-5-P operate from a 2S Li-ion battery (8.4V max)?

Yes - the device supports input voltages from 3V to 16V, fully covering the 6V–8.4V range of a 2S Li-ion battery. Its 750mV dropout at 300mA ensures regulation remains active even as the battery discharges to ~5.75V, maximizing usable capacity.

Is the exposed thermal pad electrically isolated?

No - the exposed pad is internally connected to the GND terminal (Pin 3). It must be soldered to a PCB ground plane for both electrical reference integrity and thermal conduction. Failure to connect the pad degrades θJA by >30°C/W and risks thermal shutdown under 300mA load.

What happens during thermal shutdown?

When junction temperature exceeds 165°C, the internal thermal sensor disables the pass transistor, halting output current. The device remains latched off until temperature falls to ~135°C (30°C hysteresis), then automatically resumes regulation - no external reset is needed.

Does MP2018GZD-5-P require an input capacitor?

Yes - a minimum 1µF X5R or X7R ceramic capacitor is required between IN and GND, placed as close as possible to the pin. This suppresses input ripple and prevents oscillation during line transients; larger values (up to 10µF) improve line regulation and transient response.

How accurate is the 5.0V output across temperature and load?

Output voltage is specified at ±2% over full operating conditions: -40°C to +125°C ambient, 5mA to 500mA load, and 6V–16V input. At 25°C and 5mA load, accuracy tightens to ±1% (4.9V–5.1V), verified in production test.