Analog Devices Inc./Maxim Integrated MAX20067BGTJ/V+

Overview

The MAX20067BGTJ/V+ from Maxim Integrated is an automotive-grade 3-channel TFT display bias IC integrating a current-mode boost converter (up to 18V), dual push-pull charge-pump drivers (VGON up to +32V, VGOFF down to –24V), and an 8-bit DAC-controlled VCOM buffer. It delivers gate-shading level shifting and full I²C programmability for infotainment displays requiring precise, fault-monitored power sequencing.

For engineers reviewing the MAX20067BGTJ/V+ datasheet, MAX20067BGTJ/V+ pinout, MAX20067BGTJ/V+ application, or MAX20067BGTJ/V+ equivalent, key selection criteria include its AEC-Q100 qualification, -40°C to +105°C operation, 32-pin TQFN package, and integrated diagnostics for HVINP, VGON, VGOFF, AVDD, and temperature - critical for automotive display power integrity.

Technical Context

The MAX20067BGTJ/V+ implements a synchronous boost converter with programmable switching frequencies (440kHz or 2.2MHz) and spread-spectrum modulation to reduce EMI. Its dual charge-pump architecture uses independent push-pull drivers (DRVP/DRVN) with dedicated feedback (FBGH/FBGL) for regulated high-voltage outputs.

Control is enabled via I²C interface (400kHz) or stand-alone mode using SEQ pin presets; all functional blocks - boost, charge pumps, gate-shading, and VCOM buffer - operate independently or in coordinated sequencing. Built-in fault detection includes undervoltage/overvoltage on HVINP, VGON, VGOFF; overcurrent on AVDD; and thermal warning with shutdown at 165°C.

Key Specifications

Pinout & Package

MAX20067BGTJ/V+ is housed in a compact 32-pin TQFN package (5mm × 5mm, 0.5mm pitch, exposed thermal pad), optimized for automotive PCB space constraints and thermal dissipation (θ_JA = 29°C/W on 4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20067GTJ/V+, the MAX20067BGTJ/V+ offers lower boost current (1.25A max) for cost-optimized mid-size displays, while the TPS65150RGER lacks VCOM integration and gate-shading - making MAX20067BGTJ/V+ the only AEC-Q100-qualified solution with all three functions in one package.

Availability

MAX20067BGTJ/V+ is available at Aetrix Electronics and suitable for infotainment displays, central information displays, and instrument clusters requiring stable component supply, automotive qualification, and long-term production continuity.

Supply support for MAX20067BGTJ/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 markets.

The MAX20067/MAX20067B product line targets automotive TFT-LCD display power systems, integrating bias generation, VCOM control, and gate-shading into a single AEC-Q100-qualified IC to simplify display subsystem design.

FAQ

What is the maximum output current capability of the MAX20067BGTJ/V+ boost converter?

The MAX20067BGTJ/V+ boost converter provides a maximum LXP switch current limit of 1.25A at 75% duty cycle, supporting AVDD loads up to ~1.1A (accounting for efficiency losses). This is confirmed in the Electrical Characteristics table under "LXP Current Limit" for the MAX20067B variant. The MAX20067BGTJ/V+ is optimized for mid-size automotive displays where lower power consumption and thermal footprint are prioritized over peak current.

Does the MAX20067BGTJ/V+ support both I²C and stand-alone operation modes?

Yes, the MAX20067BGTJ/V+ supports dual operation modes: full I²C control (400kHz, addresses 0x60/0x61) for dynamic configuration and diagnostics, and stand-alone mode using the SEQ pin to select among four factory-preset power-up/power-down sequences. Both modes retain all fault monitoring features, and the CTL input remains active for gate-shading in either mode - ensuring display uniformity regardless of control architecture.

What is the VCOM DAC resolution and voltage range of the MAX20067BGTJ/V+?

The MAX20067BGTJ/V+ integrates an 8-bit DAC controlling the VCOM buffer, delivering 256 steps with 19.5mV per step. Its output voltage range is 1.5V to (VCOMP – 1.5V), where VCOMP is typically tied to AVDD (up to 18V), yielding a practical VCOM span of ~1.5V to 16.5V. This resolution and range meet stringent grayscale stability requirements for automotive TFT panels, as verified in Table 2 ("VCOM DAC Values") and Electrical Characteristics.

How does the gate-shading function work on the MAX20067BGTJ/V+?

The MAX20067BGTJ/V+ gate-shading circuit uses the CTL input to trigger a hardware-based level shifter that dynamically adjusts gate-driver voltage timing across the display panel. When CTL asserts, the internal SRC–GATES and DRN–GATES switches modulate the gate-on waveform with a fixed 150ns delay (for 1nF load), improving pixel uniformity without MCU involvement. This function is fully documented in the "Gate-Shading Level Shifter" section and Table 1 ("Gate-Shading Operating Modes").

Is the MAX20067BGTJ/V+ AEC-Q100 qualified, and what grade does it meet?

Yes, the MAX20067BGTJ/V+ is AEC-Q100 qualified and meets Grade 2 requirements (operating temperature range –40°C to +105°C). This qualification is explicitly stated in the "Benefits and Features" section and confirmed in the Absolute Maximum Ratings table. The device also includes internal thermal shutdown (165°C) and hysteresis (15°C), fulfilling automotive safety and reliability mandates for display power systems.