Monolithic Power Systems Inc. MP8870GL-0001-P

Overview

MP8870GL-0001-P from Monolithic Power Systems is a fully integrated, I²C-configurable synchronous step-down converter delivering up to 15A continuous output current with 3V–18V input range, 0.3V–1.536V programmable reference voltage (1.5mV steps), and adaptive constant-on-time (COT) control for ultra-fast transient response in SoC/FPGA core power applications.

For engineers reviewing the MP8870GL-0001-P datasheet, MP8870GL-0001-P pinout, MP8870GL-0001-P application, or MP8870GL-0001-P equivalent, this device supports real-time VOUT adjustment, differential remote sensing, PMBus-compliant configuration, and one-time MTP programming for production-ready default settings including 650kHz switching frequency, 16A valley current limit, and 1ms soft-start.

Technical Context

The MP8870GL-0001-P implements an internally compensated adaptive COT control architecture that eliminates external loop compensation components while maintaining stability with zero-ESR output capacitors. Its dual-path current sensing enables precise valley current limiting (14–18A range) and hiccup-mode OCP response.

It integrates a 3.5V internal LDO (VCC), bootstrap gate driver (BST), open-drain power-good (PG) with 100µs configurable delay, and seven selectable I²C addresses via A0 resistor biasing. The GPIO pin functions as either PG or PMBus alert output, configurable via MTP/I²C register.

Key Specifications

Pinout & Package

MP8870GL-0001-P is housed in a thermally enhanced QFN-21 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (PGND-connected) for efficient heat dissipation in high-current DC/DC designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with MP8872GL-0000-P and TPS546D24RSAR, MP8870GL-0001-P delivers optimal balance of integration, programmability, and thermal performance for mid-range 10–15A core rails where space, cost, and rapid bring-up are prioritized over extreme current or digital ecosystem lock-in.

Availability

MP8870GL-0001-P is available at Aetrix Electronics and suitable for solid-state drives (SSDs), FPGA/SoC core supplies, networking equipment, and industrial control systems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MP8870GL-0001-P 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 two decades of innovation in DC/DC conversion, motor drivers, and LED lighting solutions.

The MP8870 belongs to MPS's high-current, I²C-configurable buck converter product line, designed specifically for demanding core power applications in datacenter, telecom, and industrial embedded systems where programmability, efficiency, and reliability are critical.

FAQ

What is the default MTP configuration stored in MP8870GL-0001-P?

The MP8870GL-0001-P ships with factory-programmed one-time MTP settings: reference voltage = 0.40V, switching frequency = 650kHz, valley current limit = 16A, soft-start time = 1ms, and PFM/PWM mode set to Auto. These values are loaded at power-up without host I²C intervention.

Can MP8870GL-0001-P operate without I²C communication after initial configuration?

Yes. Once the MTP is programmed, MP8870GL-0001-P operates autonomously using stored parameters. I²C is only required for runtime reconfiguration (e.g., dynamic VOUT adjustment) or reading telemetry; it is not needed for basic regulation functionality.

How does the differential remote sense (RGND/FB) improve regulation accuracy?

RGND provides a dedicated Kelvin return path for the feedback divider, rejecting voltage drop across PCB traces and connectors. This enables ±0.5% output accuracy at the load-even with 50mΩ total path resistance-without requiring post-regulation trimming or external error amplifiers.

What thermal derating applies when operating at 15A continuous in a 4-layer board?

On a standard 4-layer EVL8870-L-00A board (85mm×85mm), case temperature rise is ≤70°C at 15A/1V out with 12V input. Derating begins above 105°C junction; full 15A is maintained up to +85°C ambient with adequate airflow or heatsinking per θJA = 26°C/W.

Is the GPIO pin functional as both PG and PMBus alert simultaneously?

No. The GPIO pin is configured at boot via MTP or I²C register as either open-drain power-good (PG) or PMBus alert output-not both. When set as PG, it asserts low during UV/OV faults; when set as alert, it pulls low upon detection of any enabled fault condition.

What is the minimum output capacitance required for stable operation?

Stability is maintained with zero-ESR ceramic output capacitors. Minimum recommended value is 220µF (e.g., four 47µF/6.3V X5R 0805s in parallel), with effective series resistance (ESR) <5mΩ. No electrolytic or polymer capacitors are required for loop stability.

Does MP8870GL-0001-P support pre-biased start-up, and how is it enabled?

Yes. Pre-biased start-up is enabled by default and requires no configuration. It allows the output capacitor to retain its existing voltage during enable assertion, preventing reverse current flow into the inductor or load-critical for hot-swap and multi-rail sequencing applications.