Monolithic Power Systems Inc. MP5092GD-Z

Overview

MP5092GD-Z from Monolithic Power Systems is a dual-channel programmable current load switch IC with integrated 10mΩ R_DS(ON) FETs, supporting 0.5V–5.5V input voltage and delivering up to 7.5A per channel. It features independent enable control, output discharge, adjustable soft-start via external capacitor, and overcurrent protection using an ILIM resistor. It is deployed in portable computing power rails for USB-C PD, SSD power sequencing, and display backlight drivers.

For engineers reviewing the MP5092GD-Z datasheet, MP5092GD-Z pinout, MP5092GD-Z application, or MP5092GD-Z equivalent, key selection criteria include dual-channel independence, 7.5A programmable current limit accuracy, <200ns short-circuit response, thermal shutdown at 155°C, and QFN-18 (2mm×3mm) package compatibility with high-density PCB layouts.

Technical Context

The MP5092 implements two fully independent load switch channels, each with dedicated VCC, EN, ILIM, SS, and discharge control-enabling asymmetric configuration (e.g., one channel at 3.3V/5A, the other at 5V/7.5A). Its sense-FET current limiting uses a precision auto-zero comparator with ±6% accuracy at 7.5A and supports external resistor programming (10.5kΩ → 7.5A).

Short-circuit protection operates in two stages: primary regulation at programmed current limit (typ. 20µs response), and secondary fast-off activation at ~13A with 200ns total latency and 80µs auto-recovery. Thermal shutdown triggers at 155°C with 30°C hysteresis, and output discharge engages via internal 200Ω pull-down when EN is deasserted and load is light.

Key Specifications

Pinout & Package

MP5092GD-Z is housed in a thermally enhanced QFN-18 package (2mm × 3mm, 0.5mm pitch) with exposed thermal pad. The 18-pin layout supports dual symmetric channel routing and compact decoupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22965DSGR and NIS5132MN, MP5092GD-Z delivers higher current density (7.5A/channel), full programmability (ILIM, SS), and integrated discharge-making it uniquely suited for space-constrained, high-reliability portable power domains where thermal efficiency and fault containment are critical.

Availability

MP5092GD-Z is available at Aetrix Electronics and suitable for notebook mainboard power sequencing, USB-C PD sink control, and solid-state drive enable applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP5092GD-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, and global manufacturing partnerships.

The MP5092 belongs to MPS's load switch product line, engineered specifically for portable and high-density computing platforms where ultra-low R_DS(ON), precise current limiting, and compact thermal packaging are mandatory.

FAQ

What is the minimum input voltage required for MP5092GD-Z to operate?

The MP5092GD-Z supports an input voltage range of 0.5V to 5.5V. Operation below 0.5V is not guaranteed due to under-voltage lockout (UVLO) activation, which disables the device until VIN exceeds the rising threshold (~0.5V typical). This ensures reliable startup even with weak or partially charged sources like battery-backed rails.

How does the ILIM resistor affect current limit accuracy at low setpoints?

At current limits below 1.5A, the MP5092GD-Z's current limit accuracy degrades due to internal offset in the sense amplifier, as noted in the datasheet. For example, with RLIM = 50kΩ (targeting ~1.6A), the actual trip point may vary between 1.54A and 1.74A. Accuracy improves significantly above 2A, where offset impact is proportionally smaller.

Can MP5092GD-Z be used with a single shared VCC for both channels?

Yes-VCC1 and VCC2 can be tied together to a common 3V–5.5V bias rail. The datasheet confirms independent operation is maintained even with shared VCC, provided sufficient local decoupling (≥1µF ceramic) is placed near the VCC pins and ground connections remain low-impedance to avoid coupling noise between channels.

What happens during simultaneous short-circuit events on both channels?

Each channel responds independently: primary current limiting engages within ~20µs, followed by secondary fast-off (<200ns) if current exceeds ~13A. Both channels will enter 80µs auto-recovery cycles concurrently. Thermal shutdown activates only if combined power dissipation raises junction temperature beyond 155°C-verified in the absolute maximum ratings section.

Is the output discharge function active when the load draws significant current?

No-the internal 200Ω discharge path is only enabled when the channel is disabled (EN low) AND the output voltage is detected as lightly loaded (typically <10mA). Under heavy load, discharge is suppressed to prevent uncontrolled current sinking that could disrupt downstream regulation or cause reverse current flow.

Does MP5092GD-Z support hot-swap into a live backplane?

Yes-the MP5092GD-Z was explicitly designed for hot-swap applications. Its soft-start function controls inrush slew rate, while <200ns short-circuit response and dual-stage OCP protect the backplane from voltage droop and fault propagation during card insertion, as confirmed in the OPERATION section of the datasheet.