Infineon Technologies IR3510MTRPBF

Overview

IR3510MTRPBF from Infineon Technologies is a Hot-Swap N+1 Redundant X-Phase Controller IC for high-end CPU and server VRM power delivery. It integrates input isolation FET control, multiphase VRM regulation (with remote sense and open-sense-lead protection), and bidirectional OR-ing FET control - all in a single 32-pin MLPQ 5×5 mm package. Key confirmed parameters: 150 kHz–1 MHz programmable oscillator, dual ENABLE thresholds (0.6 V / 1.15 V), 6.75 V VBIAS reference output, ±10 mV voltage error amplifier offset, and average current mode control for precise phase current sharing.

For engineers reviewing the IR3510MTRPBF datasheet, IR3510MTRPBF pinout, IR3510MTRPBF application, or IR3510MTRPBF equivalent, this controller is selected for N+1 redundant server power systems requiring hot-swap capability, analog-programmable OVP/OCP limits, true remote sensing with fault detection, and synchronized timing interface to phase ICs like IR3086A/IR3088A.

Technical Context

The IR3510 implements a dual-loop control architecture: voltage regulation via a 100 dB DC-gain error amplifier with 4–12 MHz bandwidth, and current limiting via a separate transconductance amplifier (140 µA/mV) with 350 kHz bandwidth. Its average current mode control directly measures IIN from external phase ICs to enforce tight current sharing across paralleled VRM modules.

OR-ing functionality uses differential sensing between OR+ and OR− pins with ±2 mV comparator offset and adjustable reverse-current cutoff; input fault handling includes programmable OCP delay (via IOCD capacitor) and immediate OVP shutdown (<9.5 µs response). The integrated charge pump drives both GATE_I (input isolation FET) and GATE_O (OR-ing FET) with clamped 25–31 µA turn-on current and sub-0.6 µs OC response.

Key Specifications

Pinout & Package

IR3510MTRPBF is housed in a thermally enhanced 32-lead MLPQ (5×5 mm, 34°C/W junction-to-case), optimized for high-power server PCB layouts with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hot-swap and N+1 redundant controller applications.

Compared with ISL6367IRZ and MP8765GQ, the IR3510MTRPBF uniquely combines charge-pump-driven high-side gate control, dual-threshold enable sequencing, and dedicated OR-ing status signaling - making it the only choice for fully integrated, hot-swappable, N+1 redundant server VRM architectures.

Availability

IR3510MTRPBF is available at Aetrix Electronics and suitable for enterprise server VRM design, hot-swappable PSU modules, and redundant data center power systems requiring stable component supply and long-term lifecycle support.

Supply support for IR3510MTRPBF 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 global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

The IR35xx X-Phase controller product line was designed specifically for high-efficiency, multi-phase CPU and GPU VRMs in enterprise servers and data centers - emphasizing thermal robustness, redundancy, and analog precision.

FAQ

What is the function of the CX pin on the IR3510MTRPBF?

The CX pin connects an external 0.01 µF capacitor to generate the charge pump voltage that drives the GATE_I and GATE_O outputs. This internal charge pump produces ~5.3 V above VCC, enabling direct high-side N-channel FET gate drive without external bootstrap components or isolated supplies - critical for compact, high-reliability server power designs.

How does the IR3510MTRPBF implement N+1 redundancy?

It uses dedicated OR+ and OR− pins to monitor voltage differential across the OR-ing FET, turning GATE_O on when the local VRM output exceeds the bus voltage and off when reverse current flows. The ORING pin provides real-time status, while the average current mode control ensures balanced loading across paralleled VRMs - enabling automatic, lossless failover without manual intervention.

Can the IR3510MTRPBF be used with non-Infineon phase ICs?

Yes - it interfaces with any X-Phase-compatible phase IC via RMPOUT (phase timing sync), VREF (reference feed), and IIN (average current feedback). The datasheet confirms compatibility with IR3086A/IR3088A, but the analog control architecture (VSET, OCPSET, OVPSET) and standard remote sense interface make it interoperable with third-party multiphase controllers supporting similar analog command protocols.

What is the purpose of the two ENABLE thresholds?

The lower threshold (~0.6 V) activates input isolation FETs to precharge the VRM input capacitors, limiting inrush current; the higher threshold (~1.15 V) enables full VRM regulation and output voltage ramp-up. This staged enable sequence prevents voltage droop on shared 12 V buses and avoids false triggering of upstream OCP circuits during hot-insertion.