Monolithic Power Systems Inc. MP5516GR-0000-Z

Overview

MP5516GR-0000-Z from Monolithic Power Systems is a power loss protection (PLP) PMIC with integrated e-fuse and bidirectional buck-boost converter for enterprise SSD backup power management. It delivers 6A input current limiting, supports 2.65V–16V input, regulates up to 36V storage voltage (VSTRG), and enables configurable hold time via energy stored in external capacitors. Used in high-reliability SSDs to preserve data during sudden input failure.

For engineers reviewing the MP5516GR-0000-Z datasheet, MP5516GR-0000-Z pinout, MP5516GR-0000-Z application, or MP5516GR-0000-Z equivalent, this IC provides I²C-configurable ILIMIT_E-FUSE (1.2A–6A), COT-controlled mode transition between boost charge and buck release, reverse-current blocking, capacitor health monitoring, and dual power-good indicators (PGB/PGS) - all critical for robust PLP system design.

Technical Context

The MP5516 operates as a dual-path power manager: its e-fuse path handles input current limiting, soft-start, UVLO/OVP, and reverse-current blocking, while its bidirectional buck-boost path manages energy transfer between VBUS and STRG using a single inductor and COT control. The two paths share no switching elements but coordinate via analog comparators (FBB, FBS, DET) and digital register control.

Its internal architecture integrates an LDO (VCC = 5V), ADC for VIN/VIN_CURRENT/VIN_POWER sensing, MTP memory for 1000× programmable configuration, and dedicated MOSFET drivers for HS-FET (60mΩ), LS-FET (37mΩ), and disconnect FET (16mΩ). All protections - SCP on both load and storage sides, thermal shutdown (150°C), and pre-charge current limiting - are hardware-asserted with minimal latency.

Key Specifications

Pinout & Package

MP5516GR-0000-Z is housed in a thermally enhanced QFN-25 (4mm × 4mm, 0.5mm pitch) package with exposed thermal pad. Pin mapping is validated per MPS MP5516 Rev. 1.1 datasheet (pp. 4–5).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power loss protection applications.

Compared with TPS65988 and LTC4041, MP5516GR-0000-Z uniquely integrates e-fuse current limiting, bidirectional energy transfer, capacitor health diagnostics, and MTP-programmable parameters - making it the only solution qualified for high-reliability, high-current PLP in enterprise SSDs per JEDEC standards.

Availability

MP5516GR-0000-Z is available at Aetrix Electronics and suitable for enterprise SSDs, industrial UPS modules, server RAID controllers, and medical imaging power fail-safe systems requiring stable component supply and long-term lifecycle assurance.

Supply support for MP5516GR-0000-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 power management ICs, with over 20 years of leadership in DC/DC conversion, motor drivers, and battery management.

The MP5516 belongs to MPS's Power Loss Protection (PLP) product line, engineered specifically for mission-critical data retention in enterprise solid-state storage - emphasizing ultra-fast mode transition, capacitor longevity monitoring, and minimal external component count.

FAQ

What is the maximum storage voltage (VSTRG) supported by MP5516GR-0000-Z?

The MP5516GR-0000-Z supports a configurable storage voltage up to 36V, set via the FBS feedback divider and internal 1.2V reference. This enables use of high-voltage tantalum or polymer capacitors to maximize energy density while minimizing footprint - critical for space-constrained SSD modules.

How does the MP5516 handle reverse current during input failure?

The MP5516 integrates a reverse-blocking MOSFET at the input stage that actively prevents stored energy on the STRG rail from flowing back into a failing or disconnected VIN source. This ensures 100% of backup energy is delivered to the load during hold-up, directly improving effective tHOLD without increasing capacitor size.

Can the MP5516GR-0000-Z be used without I²C configuration?

Yes - MP5516GR-0000-Z ships with factory-default MTP settings (ILIMIT_E-FUSE = 6A, fSW = 600kHz, VSTRG = 28V, etc.) and operates immediately upon power-up with EN asserted. I²C is optional for fine-tuning, health monitoring, or dynamic reconfiguration during system runtime.

What is the purpose of the CT pin, and what capacitor value is recommended?

The CT pin connects to the drain of the internal disconnect MOSFET and stabilizes the pre-charge loop during VSTRG ramp-up. A ≥2.2µF ceramic capacitor rated ≥VSTRG must be placed between CT and AGND; its voltage rating must match the configured storage voltage to prevent breakdown during boost charging.

Does MP5516GR-0000-Z support capacitor aging detection?

Yes - the MP5516 includes integrated capacitor health detection that applies a controlled 20mA discharge current (I²C-configurable) to measure ESR and capacitance decay. Results are stored in registers accessible via I²C, enabling firmware to trigger alerts or recalibrate hold-up timing based on actual capacitor condition.

What thermal management features are built into the MP5516GR-0000-Z?

The MP5516GR-0000-Z includes hardware thermal shutdown at 150°C with 25°C hysteresis, plus junction temperature monitoring via ADC. Its QFN-25 package features an exposed thermal pad, and the datasheet specifies θJA = 22.1°C/W on a 6-layer PCB - enabling reliable 6A operation with standard 2oz copper and thermal vias.

Is the MP5516GR-0000-Z RoHS and REACH compliant?

Yes - MP5516GR-0000-Z is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. MPS confirms green status on its official quality assurance portal, and the device meets IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) 1.