Infineon Technologies CHL8550CRT

Overview

CHL8550CRT from Infineon Technologies is a high-efficiency dual-channel MOSFET driver for synchronous buck converters, supporting independent HVCC (4.0–13.2 V) and LVCC supplies, 2 A source/4 A sink low-side drive, 2 A source/2 A sink high-side drive, <10 ns propagation delay, and integrated bootstrap diode in a thermally enhanced 10-pin DFN package. It targets server memory VRMs using +5VSB in S3 sleep states.

For engineers reviewing the CHL8550CRT datasheet, CHL8550CRT pinout, CHL8550CRT application, or CHL8550CRT equivalent, key selection criteria include phase-by-phase thermal warning flag, Active Tri-Level (ATL) PWM compatibility, adaptive non-overlap control, 1 MHz switching capability, and variable gate drive optimization for efficiency at 5 V.

Technical Context

The CHL8550CRT implements adaptive non-overlap logic to prevent shoot-through during high-frequency switching up to >1 MHz, with propagation delays and transition times under 10 ns. Its dual independent supply rails (HVCC/LVCC) enable optimized gate drive strength across 4.0–13.2 V while maintaining consistent 2 A/4 A (LS) and 2 A/2 A (HS) current capability.

It integrates a bootstrap diode and supports IR's patented Active Tri-Level (ATL) PWM input, enabling precise per-phase turn-off timing for transient response optimization. The adjustable thermal warning flag provides phase-specific overtemperature indication without shutdown.

Key Specifications

Pinout & Package

CHL8550CRT uses a thermally enhanced 10-pin DFN package (3 mm × 3 mm, 0.5 mm pitch), RoHS-compliant and lead-free, with exposed thermal pad for PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel synchronous buck gate driver applications.

Compared with IR3597MTRPBF and LM5113MMX/NOPB, CHL8550CRT uniquely delivers independent HVCC/LVCC operation, per-phase thermal warning, and ATL PWM support-enabling higher efficiency, tighter transient response, and finer-grained thermal management in high-performance server VRMs.

Availability

CHL8550CRT is available at Aetrix Electronics and suitable for server DDR memory VRMs, multi-phase CPU voltage regulators, and S3 sleep-state power delivery systems requiring stable component supply and long-term lifecycle assurance.

Supply support for CHL8550CRT 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 global semiconductor leader specializing in power management, automotive, and industrial control ICs, with deep expertise in high-efficiency power conversion solutions.

The CHL8550CRT belongs to Infineon's high-frequency synchronous buck driver product line, engineered specifically for server-class voltage regulator modules demanding ultra-fast transient response, thermal resilience, and 5 V–12 V variable gate drive flexibility.

FAQ

What is the purpose of the THWARN pin on the CHL8550CRT?

The THWARN pin is an open-drain thermal warning flag that asserts low when the internal die temperature exceeds a user-adjustable threshold. It enables per-phase thermal monitoring without disabling the driver, allowing host controllers to initiate phase shedding or frequency reduction while maintaining regulation integrity.

Does the CHL8550CRT require an external bootstrap diode?

No. The CHL8550CRT integrates a bootstrap diode between HVCC and BOOT pins, eliminating the need for an external diode. This reduces component count, PCB area, and potential failure points in high-reliability VRM designs while maintaining robust bootstrap capacitor charging across temperature and load.

Can the CHL8550CRT operate with only a 5 V supply?

Yes. The CHL8550CRT supports 4.0–13.2 V on both HVCC and LVCC rails, and maintains full 2 A/4 A (LS) and 2 A/2 A (HS) drive strength at 5 V. This makes it ideal for +5VSB-powered S3 sleep-state VRMs while delivering sub-10 ns propagation delay and fast 3 nF load switching.

How does the CHL8550CRT implement non-overlap protection?

The CHL8550CRT uses adaptive non-overlap control that dynamically adjusts dead time between high-side and low-side gate signals based on supply voltage and temperature. This prevents shoot-through under varying operating conditions without fixed timing constraints, ensuring robust operation across 200 kHz–1 MHz switching frequencies.