Infineon Technologies IR3887MTRPBFAUMA1

Overview

IR3887MTRPBFAUMA1 from Infineon is a fully integrated 30 A synchronous buck regulator with OptiMOS™ power stages, Fast Constant On-Time (COT) control, 0.6 V ±0.5% reference voltage, and operation from 4.3–17 V (or 2.0–17 V with external VCC). It delivers high-efficiency point-of-load power for server VRMs and telecom baseband cards.

For engineers reviewing the IR3887MTRPBFAUMA1 datasheet, IR3887MTRPBFAUMA1 pinout, IR3887MTRPBFAUMA1 application, or IR3887MTRPBFAUMA1 equivalent, key selection criteria include programmable 600 kHz–2 MHz switching frequency, monotonic soft-start with four timing options, thermally compensated OCP with four current-limit settings, and support for ceramic output capacitors without external compensation.

Technical Context

The IR3887 implements a Fast COT control architecture with adaptive on-time generation and zero-crossing detection for stable regulation across load transients. Its internal LDO supplies gate drivers and logic, enabling single-supply operation while supporting external VCC bias to extend PVin down to 2.0 V.

It integrates high- and low-side OptiMOS™ MOSFETs with bootstrap diode, eliminating external components. Protection includes pre-bias start-up, latched/non-latched OVP via SS/Latch pin, UVP/OVP/OTP, and thermally compensated overcurrent with selectable thresholds based on ILIM pin configuration.

Key Specifications

Pinout & Package

IR3887MTRPBFAUMA1 uses a 31-pin PQFN package measuring 4 mm × 5 mm with exposed thermal pad (PGND-connected), optimized for high-current thermal dissipation and compact POL designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2960GQZ and TPS546B24A, the IR3887MTRPBFAUMA1 offers balanced analog configurability - including selectable OCP, soft-start, and FCCM/DEM - without digital complexity or input range compromise, making it optimal for analog-centric industrial and telecom POL designs.

Availability

IR3887MTRPBFAUMA1 is available at Aetrix Electronics and suitable for server VRMs, telecom baseband cards, and enterprise SSD controllers requiring stable component supply, industrial qualification, and long-term production continuity.

Supply support for IR3887MTRPBFAUMA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in silicon and silicon carbide power devices.

The IR3887 belongs to Infineon's OptiMOS™ IPOL (Integrated POL) product line, designed specifically for high-current, space-constrained point-of-load applications in datacenter, networking, and industrial infrastructure where integration, thermal performance, and analog configurability are critical.

FAQ

What is the minimum input voltage supported by IR3887MTRPBFAUMA1?

The IR3887MTRPBFAUMA1 supports a minimum input voltage of 2.0 V when an external bias supply is applied to the VCC/LDO pin. In single-supply mode (no external VCC), the minimum PVin is 4.3 V. This dual-mode capability enables use in low-voltage battery-backed or intermediate bus architectures without compromising control stability.

How does the thermally compensated overcurrent protection work?

The IR3887's OCP threshold scales linearly with junction temperature using an internal thermal sensor - for example, the 30 A setting at 25 °C reduces to ~25 A at 125 °C. This compensation prevents false triggering during thermal stress while maintaining consistent fault coverage across the full operating range, verified per JEDEC JESD22-A108 reliability testing.

Can IR3887MTRPBFAUMA1 operate with ceramic output capacitors only?

Yes - the Fast COT control architecture eliminates the need for external compensation components and is explicitly validated with ceramic-only output capacitors (e.g., 22 µF × 4 × 0805). The control loop remains stable across temperature, input voltage, and load variations without requiring tantalum or electrolytic bulk capacitance.

What is the function of the VSENM pin?

VSENM serves as the Kelvin return for pseudo remote sensing - it connects to the low-side feedback resistor and provides a dedicated analog ground reference separate from PGND. This minimizes voltage error caused by PCB trace resistance between the regulator and load, improving load regulation to ±0.5% across 0–30 A output current.