Analog Devices Inc./Maxim Integrated MAX20067GTJ/V+

Overview

MAX20067GTJ/V+ from Maxim Integrated is an AEC-Q100 qualified automotive 3-channel TFT-LCD display bias IC featuring a synchronous boost converter (up to 18V), dual charge-pump drivers (VGON +36V, VGOFF −24V), and an 8-bit DAC-controlled VCOM buffer. It integrates gate-shading level shifting, I²C programmability, and diagnostics for central information displays, infotainment systems, and instrument clusters.

For engineers reviewing the MAX20067GTJ/V+ datasheet, MAX20067GTJ/V+ pinout, MAX20067GTJ/V+ application, or MAX20067GTJ/V+ equivalent, key selection considerations include its −40°C to +105°C operation, programmable 440kHz/2.2MHz switching frequency, spread-spectrum EMI reduction, I²C-configurable sequencing, and integrated gate-shading control for display uniformity.

Technical Context

The MAX20067GTJ/V+ implements a current-mode synchronous boost converter with selectable 440kHz or 2.2MHz operation and spread-spectrum modulation to reduce EMI. Its two independent charge-pump drivers generate high-voltage rails: VGON up to +36V and VGOFF down to −24V, both with overcurrent and voltage monitoring.

It integrates an 8-bit DAC driving a rail-to-rail VCOM buffer, a gate-shading push-pull level shifter controlled via CTL input, and comprehensive diagnostics-including undervoltage/overvoltage detection on HVINP, VGON, and VGOFF, AVDD overcurrent, and temperature warning-accessible via I²C.

Key Specifications

Pinout & Package

MAX20067GTJ/V+ is housed in a 32-pin, 5mm × 5mm, 0.5mm pitch TQFN package with exposed thermal pad (EP) for enhanced power dissipation in automotive environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TFT-LCD bias applications.

Compared with MAX20091ATJ/V+ and TPS65150RGER, the MAX20067GTJ/V+ uniquely combines AEC-Q100 qualification, gate-shading correction, 8-bit VCOM DAC, and dual-rail charge pumps with I²C-accessible diagnostics-making it the only option for safety-critical, high-uniformity automotive TFT displays requiring full programmability and fault visibility.

Availability

MAX20067GTJ/V+ is available at Aetrix Electronics and suitable for central information displays, instrument clusters, and infotainment systems requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MAX20067GTJ/V+ 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 automotive, industrial, and communications applications.

The MAX20067GTJ/V+ belongs to Maxim's automotive display power management product line, engineered specifically to replace discrete bias solutions in TFT-LCD modules for next-generation digital cockpits and ADAS interfaces.

FAQ

What is the maximum output voltage of the boost converter in the MAX20067GTJ/V+?

The MAX20067GTJ/V+ boost converter delivers up to 18V output. This voltage powers downstream gate driver stages in TFT-LCD column drivers and remains stable across load and temperature variations. The MAX20067GTJ/V+ uses current-mode control and selectable switching frequencies to maintain regulation integrity under dynamic display load conditions.

Does the MAX20067GTJ/V+ support I²C-based power sequencing?

Yes, the MAX20067GTJ/V+ supports full I²C-based power sequencing for all three bias rails (VBOOST, VGON, VGOFF) and VCOM. Sequencing parameters-including delay times, ramp rates, and fault thresholds-are programmable via I²C registers. The MAX20067GTJ/V+ also offers hardware SEQ pin fallback for preset sequences if I²C communication is unavailable during startup.

Is the MAX20067GTJ/V+ qualified for automotive use?

Yes, the MAX20067GTJ/V+ is AEC-Q100 qualified (Grade 2) and operates from −40°C to +105°C. It includes internal thermal shutdown, voltage monitoring on HVINP, VGON, and VGOFF, and AVDD overcurrent protection-all reported via I²C. These features ensure robust operation in automotive cabin and under-dash environments where the MAX20067GTJ/V+ is deployed.

What is the function of the CTL pin on the MAX20067GTJ/V+?

The CTL pin on the MAX20067GTJ/V+ enables or disables the integrated gate-shading push-pull level shifter. When asserted, this circuit applies dynamic voltage correction to TFT gate lines to improve vertical luminance uniformity. The MAX20067GTJ/V+ does not require external components to implement gate-shading-this function is fully self-contained and controllable via a single logic-level input.

Can the MAX20067GTJ/V+ generate both positive and negative high-voltage rails?

Yes, the MAX20067GTJ/V+ integrates two independent charge-pump drivers: one generating VGON up to +36V and another generating VGOFF down to −24V. Each rail includes dedicated undervoltage/overvoltage monitoring, and both are fully configurable via I²C. This dual-rail capability makes the MAX20067GTJ/V+ suitable for active-matrix TFT-LCDs requiring symmetric high-voltage gate drive.