Monolithic Power Systems Inc. MP2015AGQ-33-Z

Overview

MP2015AGQ-33-Z from Monolithic Power Systems is a fixed-output 3.3V, 150mA low-quiescent-current linear regulator with 2.5V–24V input range, 700mV dropout at full load, ±2% output accuracy, and integrated thermal shutdown and current limiting. It delivers stable power to ultra-low-power microcontrollers in battery-powered industrial sensors and portable instrumentation.

For engineers reviewing the MP2015AGQ-33-Z datasheet, MP2015AGQ-33-Z pinout, MP2015AGQ-33-Z application, or MP2015AGQ-33-Z equivalent, key selection criteria include quiescent current (4.4–50µA across load), EN pin enable threshold (1.32–1.64V), FB reference voltage (1.215V), PSRR (58dB @100Hz), and QFN-8 package thermal resistance (θJA = 48°C/W).

Technical Context

The MP2015AGQ-33-Z implements a PMOS-based LDO architecture with internal feedback control referenced to a precision 1.215V bandgap. Its EN pin enables logic-controlled startup with hysteresis (0.22V) between rising (1.48V typ) and falling (1.26V typ) thresholds.

It achieves stability with ≥0.47µF ceramic output capacitance and maintains regulation under line variations (0.01–0.05%/V) and load steps (0.005–0.015%/mA). Thermal protection activates at 150–165°C with 20°C hysteresis, ensuring safe operation in enclosed environments.

Key Specifications

Pinout & Package

MP2015AGQ-33-Z uses a thermally enhanced QFN-8 (3mm × 3mm) package with exposed thermal pad connected to GND. The 8-pin layout supports compact high-density PCB designs while enabling efficient heat dissipation (θJA = 48°C/W on 4-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-quiescent-current LDO applications.

Compared with XC6210B332MR-G and ADM7172ACPZ-3.3-R7, MP2015AGQ-33-Z uniquely balances ultra-low IQ (4.4µA), 24V input tolerance, integrated EN control, and robust thermal protection in a compact QFN-8-making it optimal for space-constrained, wide-input, battery-critical designs.

Availability

MP2015AGQ-33-Z is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart meter auxiliary rails, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MP2015AGQ-33-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 power ICs, with core expertise in DC/DC converters, LDOs, motor drivers, and LED drivers.

The MP2015A series was designed specifically for ultra-low-power, wide-input-voltage applications in battery-operated and harsh-environment electronics-emphasizing quiescent current optimization, thermal resilience, and ease of integration.

FAQ

What is the minimum input voltage required for regulation at 3.3V output?

The MP2015AGQ-33-Z maintains regulation when input voltage is ≥4.0V, based on its 700mV dropout specification at 150mA load. At lighter loads, dropout decreases-e.g., <200mV at 10mA-allowing operation down to 3.5V in low-power sleep modes.

Can the EN pin be left floating?

No. The EN pin must be actively driven high (≥1.48V) or pulled to IN for guaranteed startup. Floating EN risks undefined behavior due to leakage paths; a 100kΩ pull-up to IN is recommended if GPIO control is not used.

Is an external feed-forward capacitor required for stability?

No. The MP2015AGQ-33-Z is stable with only a ≥0.47µF ceramic output capacitor. A 22nF feed-forward capacitor across the upper FB resistor improves noise performance for high-resolution ADCs but is optional and not needed for basic regulation.

How does thermal shutdown behave during overload?

When junction temperature reaches 150–165°C, the device shuts down completely. After cooling by ≥20°C (hysteresis), it automatically restarts. This cycle repeats until the overload condition is removed, protecting against permanent silicon damage.

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

Using θJA = 48°C/W and TJ(MAX) = 125°C, maximum continuous power dissipation is (125 − 85)/48 = 0.83W. Exceeding this causes thermal shutdown; actual safe dissipation depends on PCB copper area and airflow.

Does the part support reverse voltage protection?

No. The internal PMOS pass device has a body diode that conducts from OUT to IN if VOUT > VIN. An external Schottky diode in series with IN is required to prevent reverse current damage in backup-battery or hot-swap scenarios.

What is the FB pin voltage tolerance and its role in fixed-output variants?

The FB pin is internally regulated to 1.215V ±2.5% (1.191–1.239V). In fixed-output versions like MP2015AGQ-33-Z, FB is internally connected to the output divider; leaving it unconnected is correct-no external resistors are needed.