Monolithic Power Systems Inc. MP28310GC-Z

Overview

MP28310GC-Z from Monolithic Power Systems is an ultra-low-quiescent-current power-management IC combining a 300mA step-down converter with a 100mA LDO regulator. The device is designed for compact battery-powered systems that need very low standby current, a small CSP package, and two local regulated rails from a 2V to 5.5V input.

As part of the MP28310 product family, MP28310GC-Z combines 500nA quiescent current, 1.5MHz switching, 300mA buck conversion, integrated 100mA LDO regulation, shutdown support, and a 12-CSP 1.2mm x 1.6mm package. For engineers reviewing the MP28310GC-Z datasheet, MP28310GC-Z pinout, MP28310GC-Z application, or MP28310GC-Z equivalent, this device is widely used in wearables, wireless sensors, portable medical devices, IoT modules, battery-powered meters, and compact low-power embedded systems.

Technical Context

In low-power portable systems, MP28310GC-Z operates as a primary local regulator where the buck converter supplies an efficient main rail and the LDO provides a secondary low-current rail. The 500nA quiescent current helps extend standby runtime in always-on products.

The 2V to 5.5V input range supports lithium, alkaline-derived, and system 3.3V/5V rails. The 1.5MHz switching frequency reduces the size of the inductor and capacitors required around the tiny CSP package.

MP28310GC-Z is commonly used when a board needs a 300mA step-down rail, a 100mA LDO rail, ultra-low sleep current, and a very small footprint for battery-operated electronics.

Key Specifications

Pinout & Package

The MP28310GC-Z pinout includes input supply, buck switch node, buck output/feedback functions, LDO input/output pins, enable or shutdown control, and ground connections in a 12-CSP package.

For PCB design, the buck inductor and capacitors should be placed close to the IC, the switch node should be kept compact, and the LDO output capacitor should be near the LDO output pin.

Key Features

• 500nA quiescent current supports long standby life.
• 300mA buck output supplies compact digital rails.
• 100mA LDO provides a secondary low-noise rail.
• 1.5MHz switching supports small external passives.
• 12-CSP package minimizes board area.
• Shutdown function supports battery power management.

Applications

Equivalent & Alternatives

When evaluating a MP28310GC-Z equivalent, engineers should compare quiescent current, input range, buck current, LDO current, package size, switching frequency, and fixed output options.

Compared with TPS62743YFPR, MP28310GC-Z adds an integrated 100mA LDO rail in a very small CSP package. MP28310GC-Z vs MIC2225-GMYMT-TR selection depends on standby current, rail current, footprint, and required fixed output voltages.

Quality

MP28310GC-Z should be sourced as original Monolithic Power Systems components through traceable supply channels. Quality checks may include CSP package inspection, top-mark validation, solderability testing, output-voltage verification, and regulator load testing.

Production validation should include startup behavior, load transients, thermal performance, protection response, output ripple, and PCB layout review for the switching and linear regulator sections.

Availability

MP28310GC-Z available at Aetrix Electronics and is suitable for wearable, sensor, IoT, portable medical, and compact battery-powered systems requiring stable power-management component supply support.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.

For production builds, confirming package, output-voltage option, rail-current budget, lifecycle status, lead time, and sourcing continuity helps reduce procurement risk.

Manufacturer

Monolithic Power Systems is a semiconductor manufacturer specializing in high-performance power-management ICs, DC-DC converters, modules, motor drivers, battery-management devices, and compact power solutions for industrial, automotive, communication, computing, and consumer electronics.

The MP28310 product family is an MPS ultra-low-quiescent-current regulator series combining step-down conversion and LDO regulation for compact battery-powered systems.

FAQ

What is MP28310GC-Z used for?

MP28310GC-Z is used for wearables, wireless sensors, portable medical devices, IoT modules, battery-powered meters, and compact low-power embedded systems.

Where can I find the MP28310GC-Z datasheet download?

The MP28310GC-Z datasheet is available from Monolithic Power Systems and authorized distributors such as Mouser.

What should be considered in MP28310GC-Z pinout design?

Designers should keep the buck switching loop compact and place the LDO capacitor close to the output pin.

Does MP28310GC-Z include an LDO?

Yes. It includes a 100mA LDO regulator together with the buck converter.

What are common MP28310GC-Z equivalent solutions?

Common candidates include TPS62743YFPR and MIC2225-GMYMT-TR depending on standby current, LDO need, output current, and package.