Monolithic Power Systems Inc. MP5073GG-Z

Overview

MP5073GG-Z from Monolithic Power Systems is a 5.5V, 2A low-R_DS(ON) load switch with programmable current limit, soft-start control, output discharge, and power-good indication. It integrates a 50mΩ DMOS FET in a 2mm×2mm QFN-12 package and operates across 0.5V–5.5V input range. Used for rail sequencing and inrush current suppression in portable SSDs and tablet power rails.

For engineers reviewing the MP5073GG-Z datasheet, MP5073GG-Z pinout, MP5073GG-Z application, or MP5073GG-Z equivalent, key selection criteria include adjustable current limit via ILIM resistor, <200ns short-circuit response, thermal shutdown at 150°C, and PG assertion delay of 50µs - all critical for battery-powered system reliability and hot-swap compliance.

Technical Context

The MP5073GG-Z implements a sense-FET current-limit architecture with external resistor programming (ILIM pin), enabling precise 1.3–1.5A typical current limit at 23.8kΩ. Its internal charge pump drives the gate to sustain low R_DS(ON) (50mΩ @ 5V V_CC) across its 0.5V–5.5V VIN range.

It features dual-stage protection: primary current regulation (20µs response) and secondary fast-off circuitry (200ns response at ~7A peak). The PG pin provides push-pull output with 140–450mV voltage-gap threshold and 50µs delay, synchronized to V_OUT ramp completion.

Key Specifications

Pinout & Package

MP5073GG-Z uses a thermally enhanced 12-pin QFN package (2mm × 2mm, 0.4mm pitch) with exposed thermal pad (pins 6, 11, and exposed pad = VIN; pin 9 = VOUT).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar load switch applications.

Compared with TPS22919DBVR and AP22653AW5-7, MP5073GG-Z uniquely combines programmable current limiting, soft-start, output discharge, and PG signaling in a 2mm×2mm footprint-enabling robust, compact hot-swap control across ultra-low-VIN and high-reliability portable systems.

Availability

MP5073GG-Z is available at Aetrix Electronics and suitable for notebook SSD power management, tablet SoC sequencing, and USB-C port control requiring stable component supply, full production traceability, and long-term lifecycle support.

Supply support for MP5073GG-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 design centers in the US, China, and Taiwan.

The MP5073 belongs to MPS's load switch product line, engineered for space-constrained, battery-operated systems requiring precise inrush control, fault resilience, and rail monitoring without external components.

FAQ

What is the minimum input voltage supported by MP5073GG-Z?

The MP5073GG-Z operates down to 0.5V input voltage, enabling compatibility with partially discharged single-cell Li-ion batteries and low-voltage always-on rails. This is verified in the Absolute Maximum Ratings table and confirmed in Recommended Operating Conditions (VIN ≥ 0.5V).

How is the current limit set, and what resistor value yields 2A?

The current limit is set by an external resistor from ILIM to GND. Using the formula I_LIMIT = (1/R_LIMIT) × 33,000, a 15kΩ resistor yields ~2.2A (per Design Example Table 1). At 23.8kΩ, the typical limit is 1.4A - confirming programmability across 0.5–2A range.

Does MP5073GG-Z support reverse current blocking?

No, MP5073GG-Z does not provide reverse current blocking. It is a unidirectional high-side load switch with VIN-to-VOUT conduction only. Reverse flow (e.g., VOUT > VIN) is not blocked and may cause back-powering unless external diodes or circuits are added.

What is the purpose of connecting NC pins 7, 8, and 10 to VOUT?

Connecting NC pins 7, 8, and 10 to VOUT improves thermal performance by increasing copper area for heat spreading and enhances electrical compatibility with pin-compatible variants MP5087 and MP5077, simplifying multi-source board design.

Can the soft-start time be disabled or bypassed?

No, soft-start cannot be fully disabled. If the SS pin is left floating or the capacitor is too small (<4.7nF), the VOUT rise time defaults to MOSFET gate-charge limitation - resulting in uncontrolled inrush. A minimum 4.7nF capacitor is required for predictable slew control.

Is the PG pin actively driven high or open-drain?

The PG pin is a push-pull output, actively driven high to VCC or low to GND. It does not require an external pull-up. When asserted, it sources up to 4mA (VPG_H = 3.2V @ VCC=3.3V); when deasserted, it sinks 1mA with VPG_L ≤ 0.3V - enabling direct interface with digital logic.

What happens during thermal shutdown, and how does recovery work?

At 150°C junction temperature, MP5073GG-Z disables the power FET and holds VOUT low. After cooling by 30°C (to ≤120°C), it automatically resumes normal operation without requiring EN toggling - providing self-recovering fault handling during transient overloads.