Infineon Technologies CHL8214-01CRT

Overview

CHL8214-01CRT from Infineon Technologies is a dual-loop digital multi-phase buck controller for GPU voltage regulation, supporting up to 4+1 phases per loop, I²C-configurable VID selection (3-bit), and IR Adaptive Transient Algorithm (ATA) for bulk capacitor reduction. It operates from 3.3V ±10%/−15%, delivers per-loop OVP/UVP/OCP protection, and integrates thermistor-based VRHOT# signaling.

For engineers reviewing the CHL8214-01CRT datasheet, CHL8214-01CRT pinout, CHL8214-01CRT application, or CHL8214-01CRT equivalent, key selection criteria include dual-loop phase control (2/3/4+1), I²C address programmability, Dynamic Phase Control (DPC), IR Efficiency Shaping, and MTP-based custom configuration storage.

Technical Context

The CHL8214-01CRT implements two independent digital PWM control loops with configurable switching frequencies from 200 kHz to 1.2 MHz per phase. Each loop supports Active Diode Emulation and 1-phase light-load modes, and features proprietary non-linear ATA for transient response optimization without external compensation.

It integrates I²C interface with pin-selectable address, security enable pin, and SMBus-compatible timing. The device uses MTP memory to store custom configurations and supports IR ATL-compatible 3.3V tri-state drivers, with analog signal footprint compatibility to CHL8225 for layout reuse.

Key Specifications

Pinout & Package

CHL8214-01CRT is housed in a 40-pin 6×6 mm QFN package with exposed thermal pad. Pin functions are validated per Figure 1 (CHL8213/14 Package Top View) in the August 2013 datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-loop GPU buck controller applications.

Compared with CHL8213-01CRT, CHL8214-01CRT adds VRHOT# and thermistor support for thermal-aware GPU power management; versus ISL6377IRZ, it enables digital telemetry, adaptive transient response, and phase optimization unattainable in analog-only architectures.

Availability

CHL8214-01CRT is available at Aetrix Electronics and suitable for GPU core regulation, GDDR memory rail control, and overclocking platform development requiring stable component supply and long-term design-in support.

Supply support for CHL8214-01CRT 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 digital power conversion.

The CHL82xx family targets high-performance GPU voltage regulation, emphasizing digital configurability, thermal intelligence, and minimal external component count for next-gen graphics platforms.

FAQ

What is the function of the VRHOT# pin on CHL8214-01CRT?

The VRHOT# pin is an open-drain, active-low thermal alert output that asserts when the internal thermistor circuit detects die temperature exceeding the programmed threshold. It interfaces directly with GPU ASIC thermal management logic to trigger throttling or shutdown, and is absent on CHL8213 variants.

Can CHL8214-01CRT operate with only one active phase per loop?

Yes - CHL8214-01CRT supports 1-phase operation and Active Diode Emulation mode per loop, automatically entered under light load conditions to reduce switching losses. This behavior is configurable via I²C register settings and does not require external hardware changes.

How does the I²C security enable pin affect configuration access?

The ADDR/PROT/EN_L2 pin must be held high to unlock I²C write access to configuration registers. When low, all write operations are blocked, preventing runtime tampering. This hardware-enforced security layer complements software-level I²C bus locking features.

Is CHL8214-01CRT compatible with 3.3V tri-state gate drivers?

Yes - CHL8214-01CRT is explicitly designed to interface with IR ATL-compliant 3.3V tri-state drivers. Its PWM outputs meet timing and voltage swing requirements for direct connection without level-shifting, simplifying driver stage design and reducing propagation delay.