Infineon Technologies IR3507ZMTRPBF

Overview

IR3507ZMTRPBF from Infineon Technologies is a multiphase synchronous buck controller Phase IC designed for high-performance CPU/ASIC power delivery. It implements feed-forward voltage-mode PWM control, lossless inductor current sensing, and single-wire average current sharing across up to 8 phases. With 7V/2A high-side and 4A sink low-side gate drivers, it supports up to 5.1V output in systems using XPhase3™ architecture.

For engineers reviewing the IR3507ZMTRPBF datasheet, IR3507ZMTRPBF pinout, IR3507ZMTRPBF application, or IR3507ZMTRPBF equivalent, key selection criteria include phase timing daisy-chain capability (PHSIN/PHSOUT), PSI-enabled light-load efficiency optimization, bootstrapped synchronous PFET integration, and thermal-aware self-calibration of PWM ramp and current sense amplifiers.

Technical Context

The IR3507ZMTRPBF operates as a slave phase controller in the XPhase3™ architecture, receiving DACIN reference, EAIN error signal, and CLKIN/PHSIN timing from a master Control IC. It executes trailing-edge PWM with input-voltage–dependent ramp slope adjustment to maintain loop stability under line transients.

It integrates dual gate drivers (GATEH/GATEL), lossless current sensing via CSIN+/CSIN−, and analog IOUT bus for inter-phase current sharing. The 3-wire digital bus enables precise phase interleaving without external timing components, while PSI de-assertion triggers anti-bias circuitry to prevent output sag during state transitions.

Key Specifications

Pinout & Package

IR3507ZMTRPBF uses a 20-lead MLPQ package (4 mm × 4 mm body, 0.5 mm pitch) with exposed thermal pad for efficient heat dissipation in high-current multiphase VRMs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multiphase phase controller applications.

Compared with IR35203MTRPBF (its required master IC) and ISL6367IRZ (a competing 6-phase controller), IR3507ZMTRPBF uniquely delivers daisy-chain–based phase alignment, PSI-driven efficiency scaling, and lossless current sensing in a compact 4×4 mm MLPQ package-enabling higher density and lower system cost in next-gen CPU/ASIC VRMs.

Availability

IR3507ZMTRPBF is available at Aetrix Electronics and suitable for server CPU VRMs, AI accelerator power modules, FPGA core supplies, and network ASIC power delivery requiring stable component supply and long-term lifecycle support.

Supply support for IR3507ZMTRPBF 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 high-efficiency DC-DC conversion solutions.

The IR3507Z belongs to Infineon's XPhase3™ multiphase controller product line, engineered specifically for high-current, low-voltage CPU/ASIC power delivery with emphasis on light-load efficiency, thermal robustness, and system-level timing precision.

FAQ

What is the role of the PHSIN and PHSOUT pins in IR3507ZMTRPBF?

PHSIN receives the phase timing signal from the upstream device (Control IC or prior Phase IC), while PHSOUT drives the downstream device to form a daisy chain. This 3-wire digital bus enables precise N-phase interleaving without external delay components, achieving <15 ns phase skew across all channels in production systems.

How does the PSI interface improve light-load efficiency?

The PSI input triggers automatic phase shedding and gate driver bias reduction when asserted low. Its 620 mV rising threshold and built-in anti-bias circuitry prevent output voltage sag during transitions, enabling >85% efficiency at 5% load in 8-phase configurations without compromising transient response.

Can IR3507ZMTRPBF operate without an external Control IC?

No. IR3507ZMTRPBF is a slave-only Phase IC requiring a master Control IC (e.g., IR35203) to provide DACIN reference, EAIN error signal, CLKIN clock, and system-level fault management. It lacks VID decoding, oscillator, or error amplifier circuitry needed for standalone operation.

What is the maximum supported switching frequency per phase?

The IR3507ZMTRPBF supports per-phase switching frequencies from 250 kHz to 1.5 MHz, constrained by the system clock (CLKIN) range of 500 kHz to 9 MHz and the number of phases. For example, a 4-phase design with 2 MHz system clock yields 500 kHz per-phase frequency with precise interleaving via PHSIN/PHSOUT.