MAX1881EUG+

Overview

The MAX1881EUG+ is a quad-output DC-DC converter designed for active matrix thin-film transistor (TFT) liquid crystal displays. It integrates one high-power step-up converter, two low-power charge pumps, and a linear regulator within a TSSOP-24 package. The main converter generates an output up to 13V with efficiencies reaching 91%. Charge pumps regulate positive and negative outputs up to ±40V. A resistor-programmable 40mA LDO provides preregulation or postregulation. The device operates from a 2.7V to 5.5V input voltage range.

Feature Summary

• Integrates a high-power step-up converter with current-mode PWM architecture for fast transient response.
• Includes dual low-power charge pumps that independently regulate positive and negative supply rails.
• Features a built-in resistor-programmable 40mA low-dropout linear regulator for flexible supply conditioning.
• Contains a VCOM buffer capable of driving the capacitive backplane of TFT LCD panels.

Applications

• Powering active matrix thin-film transistor (TFT) liquid crystal displays
• Generating regulated voltages for display row and column drivers
• Providing bias supplies for capacitive backplanes in panel applications

Procurement Notes

Verify component authenticity through authorized channels due to limited availability status. Confirm package integrity upon receipt as the unit utilizes a TSSOP-24 surface-mount configuration. Ensure input voltage specifications remain within the 2.7V to 5.5V operational range during system integration testing. Cross-reference datasheet revision details to align with current design requirements.

Selection Notes

Select this component when designing power systems for TFT LCD modules requiring multiple regulated rails from a single low-voltage source. The integrated topology reduces external component count compared to discrete solutions. Consider the 40mA LDO limit for load requirements; utilize external transistors if higher current is necessary. Evaluate thermal performance given the power dissipation characteristics inherent to the integrated switching and linear regulation functions.

Part Context

This part belongs to the MAX1778/MAX1880–MAX1885 family of multiple-output DC-DC converters. These devices are specifically engineered to meet the complex power supply needs of active matrix displays. The series distinguishes itself by combining high-efficiency switching with precise linear regulation in a compact form factor suitable for space-constrained electronic assemblies.

Replacement Considerations

Public confirmed substitute part numbers: MAX1778EUG+, MAX1880EUG+, MAX1882EUG+, MAX1883EUG+, MAX1884EUG+. Verify functional equivalence regarding output configurations and current capabilities before substitution.