IR35203MTRPBF

IR35203MTRPBF is a multi‑phase buck regulator controller from International Rectifier (IR). It drives external MOSFETs to regulate processor/GPU core voltages in a multi‑phase VRM, delivering high efficiency and fast transient response. Key features typically include current‑mode control, programmable switching frequency (hundreds of kHz range), multiple phase outputs, soft‑start, enable input, and protection mechanisms such as over‑current, over‑voltage, under‑voltage lockout, thermal shutdown, and fault/power‑good signaling. It requires external high/low side MOSFETs, bootstrap components, inductors, and a feedback network to set the output voltage. The MTRPBF suffix indicates a RoHS‑compliant Pb‑free package variant.

Key features of IR35203MTRPBF (3-Phase VRM Controller):
- 3-phase multiphase PWM controller for external MOSFETs; drives six gate outputs (HOx/LOx) for three high-side/low-side FETs.
- Interleaved 3-phase operation for reduced input ripple and improved transient response.
- Programmable switching frequency with SYNC input for phase synchronization (up to ~1 MHz possible, depending on config).
- Analog feedback with error amplifier, reference, and feed-forward for stable voltage regulation.
- Current-mode PWM with slope compensation for stable operation under heavy load; per-phase cycle-by-cycle current limit and hiccup protection on fault.
- Protections: UVLO/OVP, per-phase OCP, fault latch with status/power-good indicators.
- Soft-start, enable control, and adjustable dead-time to optimize efficiency and timing.
- Phase synchronization and fault/status reporting via dedicated pins (PGOOD/FAULT).
- Wide controller supply range with low quiescent current.
- Pb-free, MTRPBF package.

- Pin count: 16 pins (MSOP-16, MTRPBF package)
- Function: 3-phase multiphase buck voltage-regulator controller. Drives three high-side/low-side gate outputs (HOx/LOx) for a VRM, with oscillator, current sense, feedback, enable, and power-good signals for CPU/core voltage regulation.

- Manufacturer: Infineon Technologies (orig. International Rectifier; the IR35203 line was acquired when Infineon bought IR).
- Company type: A German multinational semiconductor company that designs and manufactures power management ICs and other semiconductor devices.

IR35203MTRPBF is a multiphase buck regulator controller. Typical applications include:
- CPU and GPU voltage regulators (VRMs)
- Motherboard power modules and chipset/memory rails
- Server, workstation, and high-end telecom/industrial DC-DC converters
- Point-of-load rails for FPGAs, ASICs, and network processors
- Other high-efficiency, fast-transient multiphase DC-DC converters requiring precise regulation.

8-pin MSOP package (MSOP-8), Pb-free, delivered in Tape & Reel.