Analog Devices Inc./Maxim Integrated MAX17021GTL+T

Overview

The MAX17021GTL+T from Maxim Integrated is a dual-phase, Quick-PWM™ step-down VID power-supply controller designed for IMVP-6+ CPU core supplies in notebook computers. It delivers ±0.5% output-voltage accuracy over line/load/temperature, supports 7-bit VID (0–1.50V), and operates with 4V–26V input across two interleaved phases to reduce ripple and improve transient response. Its active voltage positioning and true differential current sensing enable precise regulation for high-current mobile processors.

For engineers reviewing the MAX17021GTL+T datasheet, MAX17021GTL+T pinout, MAX17021GTL+T application, or MAX17021GTL+T equivalent, key selection criteria include IMVP-6+ compliance, dual-phase current balancing, programmable 200–800kHz switching frequency, thermal-fault (VRHOT) and phase-good (PHASEGD) monitoring, and support for ceramic/tantalum/polymer bulk capacitors in compact 5mm × 5mm TQFN packages.

Technical Context

The MAX17021GTL+T implements a dual-phase interleaved Quick-PWM architecture with out-of-phase operation to minimize input/output ripple and simplify EMI filtering. It integrates boost switches, slew-rate-controlled VID transitions, and a dedicated droop amplifier (Gm = 590–610 µS) for dynamic load-line compensation.

Its fault protection includes output overvoltage (1.75–1.85V trip), undervoltage (−450 to −350 mV), thermal shutdown at 160°C, and phase imbalance detection via PHASEGD. The controller supports soft-start/shutdown, suspend-exit control, and VRHOT thermistor-based thermal-fault signaling.

Key Specifications

Pinout & Package

MAX17021GTL+T is housed in a 40-pin, 5mm × 5mm thin QFN package with exposed pad (EP) connected to GND for thermal dissipation. Pin functions are validated per Maxim's official pin configuration diagram (Rev 2, 7/09).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-phase IMVP-6+/IMVP-6.5 CPU core supply applications.

Compared with MAX17082GTL+T and RT8803AZQW, the MAX17021GTL+T uniquely combines IMVP-6+ compliance, VRHOT thermal fault signaling, and PHASEGD imbalance detection in a single 40-pin TQFN-enabling higher system reliability and tighter voltage margins in premium mobile platforms.

Availability

MAX17021GTL+T is available at Aetrix Electronics and suitable for notebook CPU core supplies, blade server VRMs, voltage-positioned step-down converters, and multiphase desktop CPU power applications requiring stable component supply and long-term industrial availability.

Supply support for MAX17021GTL+T 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, computing, and communications applications.

The MAX17021GTL+T belongs to Maxim's Quick-PWM™ CPU power-controller family, engineered specifically for IMVP-6+ compliant notebook and mobile computing platforms requiring high efficiency, tight voltage regulation, and advanced fault diagnostics.

FAQ

What is the supported VID voltage range for the MAX17021GTL+T?

The MAX17021GTL+T supports a 7-bit VID interface covering 0V to 1.50V in precise steps, fully compliant with IMVP-6+ specifications for Intel Montevina processors. Its DAC achieves ±0.5% DC output-voltage accuracy across this range when measured at the FB pin relative to GNDS, including load-regulation error. This ensures reliable CPU core voltage scaling under varying thermal and loading conditions.

Does the MAX17021GTL+T include overvoltage protection?

Yes, the MAX17021GTL+T includes dedicated output overvoltage protection (OVP) with a trip threshold of 1.75V to 1.85V measured at the FB pin. When triggered, it initiates immediate shutdown to protect the CPU. This OVP function is confirmed in the device's Electrical Characteristics table and applies only to the MAX17021GTL+T and MAX17082GTL+T-not the MAX17482GTL+T. Propagation delay is 10µs.

What package type and thermal characteristics does the MAX17021GTL+T use?

The MAX17021GTL+T uses a 40-pin, 5mm × 5mm thin QFN package with exposed pad (TQFN-EP), rated for continuous operation from −40°C to +105°C. At +70°C ambient, its continuous power dissipation is 1778mW, derating at 22.2mW/°C above that temperature. The exposed pad must be soldered to a PCB ground plane for optimal thermal performance and electrical stability.

How does the MAX17021GTL+T implement active voltage positioning?

The MAX17021GTL+T implements active voltage positioning using its FBAC pin and internal droop amplifier (Gm = 590–610 µS). By injecting a current proportional to load current into the feedback node, it intentionally lowers output voltage under load-reducing power dissipation and bulk capacitance requirements. The GNDS input allows direct sensing of CPU ground bounce, and AGNDS gain is trimmed to 0.97–1.03 V/V for precise load-line slope control.

What fault-monitoring outputs does the MAX17021GTL+T provide?

The MAX17021GTL+T provides four dedicated fault-monitoring outputs: PWRGD (power-good), VRHOT (thermal fault), PHASEGD (phase imbalance), and CLKEN (clock enable). PWRGD asserts after a 3–10ms startup delay when output reaches regulation; VRHOT activates when THRM pin voltage falls below 28–32% of VCC; PHASEGD flags current mismatch exceeding ±1.25mV; and CLKEN synchronizes downstream clocks only when regulation is stable.